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Sample records for molar deciduo inferior

  1. The sealing of second mandibular temporary molar pits and fissure with the laser of Nd: YAG, phosphoric acid and the glass ionomer cement; Selamento de fossulas e fissura de segundo molar deciduo inferior com laser de Nd: YAG, acido fosforico e cimento de ionomero de vidro

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    Toda, Maria Aparecida

    2003-07-01

    The main of our study was to check the sealing of second mandibular temporary molar pits and fissure, in vitro, with the laser of Nd: YAG, phosphoric acid at 37% and the glass ionomer cement (CIV, Fuji IX GC).The proposal was to check the structural morphologic changes in the laser irradiation upon the enamel surface to watch the pits and fissure sealing with the glass ionomer cement use after the laser irradiation and to verify the efficiency of the 'double conditioning' (phosphoric acid + Nd: YAG). At the same time we watch the evolution of the temperature in the pulp chamber's inside. Our desire was to achieve a therapeutic alternative technic to prevent the dental caries. The Nd: YAG laser parameters were the same: 79 mJ of energy per pulse; frequency of 5 Hz; mean power of 0,4 W; optical fiber on contact of 320 {mu}m diameter; fluency of 99,52 J/ cm{sup 2}, assuming that the only differential was the time of the laser application on the enamel surface. The samples were prepared with this way: Laser Nd: YAG (53 second) + acid + CIV (Fuji IX); Laser Nd: YAG (53 s); Laser Nd: YAG (20 s + 20 s) + acid + CIV; Laser Nd: YAG (20 s + 20 s); Acid + CIV; Control. Through the scanning electron microscopy (MEV) we noticed fusion and resolidification regions due to the laser irradiation and a better adaptation of the glass ionomer cement when we did the 'double conditioning'. Concerning the temperature increase we can conclude that the echeloned period was the best recommended because the temperature was found in a pattern that would not cause any damage to the dental pulp. For future studies we suggest a longer relaxing time between the laser irradiation, a comparative study of this method with other lasers, the use of other sealing materials and the study with the permanent teeth. (author)

  2. Lower Third Molar Region Región del Tercer Molar Inferior

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    Iván Suazo Galdames

    2012-01-01

    The lower third molar region is an important region for the odontostomatological practice, since it presents a great amount of pathological processes related to the development and eruption of the third molar; thus having a considerable number of surgical interventions. Despite its importance, this region is not accounted for in anatomical terminology nor is it described in topographic anatomy; and in spite of the great number of studies that analyze the surgical anatomy of the region, it is ...

  3. Eruption chronology of the first deciduous teeth in children born prematurely with birth weight less than 1500g / Cronologia de erupcao dos primeiros dentes deciduos em criancas nascidas prematuras com peso inferior a 1500g / Cronologia de erupcion de los primeros dientes deciduos en ninos nacidos prematuros y con peso al nacer inferior a 1500g

    Scientific Electronic Library Online (English)

    Pedro Garcia, F. Neto; Mario Cicero, Falcao.

    2014-03-01

    Full Text Available Objetivo: Descrever a cronologia de erupção dos primeiros dentes decíduos em crianças prematuras com peso de nascimento menor que 1500g e comparar as diferenças entre os sexos e entre a adequação nutricional ao nascimento. Métodos: Estudo longitudinal com 40 crianças prematuras e de muito baix [...] o peso ao nascer, de ambos os sexos. Considerou-se dente erupcionado no momento em que a coroa atravessou a gengiva e passou a pertencer ao ambiente bucal. A comparação da cronologia de erupção quanto ao sexo e entre as crianças adequadas e não adequadas nutricionalmente ao nascer foi realizada com o teste t de Student, sendo significante p Abstract in spanish Objetivo: Describir la cronología de erupción de los primeros dientes deciduos en niños prematuros con peso al nacer inferior a 1500g y comparar las diferencias entre los sexos y entre la adecuación nutricional al nacer. Métodos: Estudio longitudinal con 40 niños prematuros y de muy bajo peso [...] al nacer, de ambos sexos. Se consideró diente erupcionado en el momento en que la corona atravesó la encía y pasó a pertenecer al ambiente bucal. La comparación de la cronología de erupción respecto al sexo y entre los niños adecuados y no adecuados nutricionalmente al nacer se realizó con la prueba t de Student. El nivel de significancia fue de 0,05. Resultados : La erupción del (los) primer(os) diente(s) tuvo lugar, en promedio, a los 11,00±2,06 meses de edad cronológica y con 9,61±1,91 meses de edad corregida para la prematuridad. Los primeros dientes erupcionados fueron los incisivos centrales inferiores (81 y 71). El promedio de erupción en el sexo masculino fue de 9,74±1,91 y, en el femenino, de 9,46±1,95 meses, ambas corregidas para la prematuridad (p=0,98). El promedio de erupción en los niños adecuados nutricionalmente al nacer fue de 10,05±1,36 meses y, en los pequeños, de 9,35±2,16, también corregidas para la prematuridad (p=0,07). Conclusiones: El promedio de edad de erupción de los primeros dientes corregido para la prematuridad fue de 9,61 meses. El sexo y la adecuación nutricional al nacer no alteraron la cronología de la erupción. Abstract in english Objective: To describe the eruption chronology of the first deciduous teeth in premature infants with birth weight less than 1500g and to compare it according to gender and nutritional status at birth. Methods: Longitudinal study including 40 low birth weight premature infants of both genders. [...] The tooth was considered erupted when the crown went through the gum and became part of the oral environment. The comparison of the eruption chronology in relation to gender and among children appropriate or small for gestational age was done by Student's t-test, being significant p

  4. Avaliação ortopantomográfica das angulações mesiodistais de caninos, pré-molares e molares inferiores com e sem a presença dos terceiros molares Panoramic evaluation of the mesiodistal angulations of canine teeth, premolar and inferior molars with and without the presence of the third molars

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    Rodrigo Castellazzi Sella

    2009-12-01

    Full Text Available OBJETIVOS: comparar os valores médios normais das angulações mesiodistais dentárias, propostos por Ursi, em 1989, com as angulações mesiodistais de caninos, pré-molares e molares inferiores em indivíduos com e sem a presença dos terceiros molares inferiores e idades entre 18 e 25 anos. Além disso, foram comparados os valores das angulações mesiodistais desses dentes nessas duas situações. MÉTODOS: foram utilizadas 40 radiografias ortopantomográficas de indivíduos, de ambos os gêneros, que não receberam tratamento ortodôntico, divididos em dois grupos: Grupo I, constituído por 20 radiografias que não apresentavam os terceiros molares inferiores; e Grupo II, formado por 20 radiografias com os terceiros molares inferiores presentes. RESULTADOS E CONCLUSÕES: a análise dos resultados e a análise estatística permitiram concluir que ambos os grupos exibiram pré-molares e molares inferiores mais angulados em sentido mesial, quando comparados à oclusão normal. Por outro lado, a angulação mesiodistal de caninos inferiores mostrou-se semelhante àquela apresentada em casos de oclusão normal. Os dois grupos, quando comparados entre si, exibiram semelhantes valores angulares dos caninos, pré-molares e molares inferiores, de modo que a presença dos terceiros molares não exerceu influência sobre essas angulações mesiodistais dentárias.AIM: To compare the normal mean values of the mesiodistal axial angulation, proposed by Ursi in 1989, with the mesiodistal axial angulation of canine teeth, premolar and inferior molars in individuals with and without the presence of the third inferior molars and ages between 18 and 25 years. Besides, the values of the mesiodistal axial angulation of these teeth were compared in these two situations. METHODS: Forty panoramic x-rays were used from individuals of both genders that didn't receive orthodontic treatment, divided in two groups: Group I, constituted by 20 x-rays that didn't present the third inferior molars, and Group II, formed by 20 x-rays with the presence of the third inferior molars. RESULTS AND CONCLUSIONS: The results analysis and the statistical analysis allowed to conclude that both Groups exhibited inferior premolar and molars more angled in mesial direction when compared to the normal occlusion. On the other hand, the mesiodistal axial angulation of inferior canine teeth was similar to the presented in cases of normal occlusion. The two groups, when compared amongst themselves, exhibited similar angular values of the canine teeth, premolar and inferior molars, so that the presence of the third molars didn't exercise influence on these dental angulations.

  5. Avaliação ortopantomográfica das angulações mesiodistais de caninos, pré-molares e molares inferiores com e sem a presença dos terceiros molares / Panoramic evaluation of the mesiodistal angulations of canine teeth, premolar and inferior molars with and without the presence of the third molars

    Scientific Electronic Library Online (English)

    Rodrigo Castellazzi, Sella; Marcos Rogério de, Mendonça; Osmar Aparecido, Cuoghi.

    2009-12-01

    Full Text Available OBJETIVOS: comparar os valores médios normais das angulações mesiodistais dentárias, propostos por Ursi, em 1989, com as angulações mesiodistais de caninos, pré-molares e molares inferiores em indivíduos com e sem a presença dos terceiros molares inferiores e idades entre 18 e 25 anos. Além disso, f [...] oram comparados os valores das angulações mesiodistais desses dentes nessas duas situações. MÉTODOS: foram utilizadas 40 radiografias ortopantomográficas de indivíduos, de ambos os gêneros, que não receberam tratamento ortodôntico, divididos em dois grupos: Grupo I, constituído por 20 radiografias que não apresentavam os terceiros molares inferiores; e Grupo II, formado por 20 radiografias com os terceiros molares inferiores presentes. RESULTADOS E CONCLUSÕES: a análise dos resultados e a análise estatística permitiram concluir que ambos os grupos exibiram pré-molares e molares inferiores mais angulados em sentido mesial, quando comparados à oclusão normal. Por outro lado, a angulação mesiodistal de caninos inferiores mostrou-se semelhante àquela apresentada em casos de oclusão normal. Os dois grupos, quando comparados entre si, exibiram semelhantes valores angulares dos caninos, pré-molares e molares inferiores, de modo que a presença dos terceiros molares não exerceu influência sobre essas angulações mesiodistais dentárias. Abstract in english AIM: To compare the normal mean values of the mesiodistal axial angulation, proposed by Ursi in 1989, with the mesiodistal axial angulation of canine teeth, premolar and inferior molars in individuals with and without the presence of the third inferior molars and ages between 18 and 25 years. Beside [...] s, the values of the mesiodistal axial angulation of these teeth were compared in these two situations. METHODS: Forty panoramic x-rays were used from individuals of both genders that didn't receive orthodontic treatment, divided in two groups: Group I, constituted by 20 x-rays that didn't present the third inferior molars, and Group II, formed by 20 x-rays with the presence of the third inferior molars. RESULTS AND CONCLUSIONS: The results analysis and the statistical analysis allowed to conclude that both Groups exhibited inferior premolar and molars more angled in mesial direction when compared to the normal occlusion. On the other hand, the mesiodistal axial angulation of inferior canine teeth was similar to the presented in cases of normal occlusion. The two groups, when compared amongst themselves, exhibited similar angular values of the canine teeth, premolar and inferior molars, so that the presence of the third molars didn't exercise influence on these dental angulations.

  6. Má oclusão de Classe I com biprotrusão e ausência dos primeiros molares inferiores Angle Class I malocclusion with bimaxillary dental protrusion and missing mandibular first molars

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    Aldino Puppin Filho

    2011-01-01

    O presente relato de caso descreve o tratamento ortodôntico de uma paciente de 24 anos de idade, portadora de má oclusão de Classe I de Angle, com protrusão dos incisivos superiores e inferiores, além de perda recente dos primeiros molares inferiores. O tratamento idealizado envolveu a exodontia dos primeiros pré-molares superiores, aliada ao fechamento dos espaços presentes na arcada inferior. O resultado obtido demonstra a necessidade de planos de tratamento individualizados e a importância...

  7. Comparative in Vitro Study Between the Visibility of the Caries Lesion and the Optic Density of Proximal Surfaces in Deciduos Molars

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    Tania DHREMER

    2006-08-01

    Full Text Available Objective: This report uses the indirect digital image program “DentScan-DentView”®, in order to compare averages of optical density in carious lesion with visible activity and inactivity in healthy tissue of primary molars all done in vitro. Method: The sample of 193 proximal faces in primary molars was visually analyzed, x-rayed and scanned. It was used 't' of paired Student test and ANOVA with Tuckey test for statistical analysis. Results: The average of optical density in rigid tissues (enamel and dentine in the control group, were always higher than in tissues with carious lesion diagnoses using visual and tactile clinical exams in vitro, in the same teeth. Conclusion: It was concluded that the average of enamel optical density is significantly over the level p<0.0001 compared to dentine and tissues with proximal carious lesion. The enamel optical density seems to decrease with in increase of proximal carious severity.

  8. Movimentação de molares inferiores ancorados em mini-parafusos / Mandibular molar uprighting, using mini-screw as anchorage

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    Rosana Canteras, Di Matteo; Nelson, Villa; Wilson Roberto, Sendyk.

    2005-08-01

    Full Text Available Freqüentemente a movimentação ortodôntica exige recursos adicionais de ancoragem. Os mini-parafusos têm-se apresentado como uma possível solução. O propósito deste trabalho foi estabelecer um método para a verticalização de molares inferiores inclinados para mesial, utilizando ancoragem em mini-para [...] fusos colocados na região de linha oblíqüa externa da mandíbula. Foram selecionados três pacientes entre 40 a 48 anos (dois do gênero feminino, um do gênero masculino), com molares inferiores inclinados para mesial e distalmente posicionados às áreas edêntulas. Os pacientes foram tratados ortodonticamente durante um período de 6 a 12 meses, com técnica ortodôntica MD3. Mini-parafusos de titânio foram colocados bilateralmente com anestesia local. Uma incisão sobre a linha oblíqüa externa da mandíbula, medindo aproximadamente 1 cm foi realizada em cada lado, distalmente aos molares inclinados. Após descolamento muco-periosteal, mini-parafusos foram implantados e foram realizadas suturas deixando suas cabeças exteriorizadas. Uma semana após a remoção das suturas, cargas ortodônticas (entre 150 a 200 gramas/força) foram aplicadas através de forças elásticas. Verificamos que alguma inflamação foi observada ao redor dos mini-parafusos, mas foi controlada com procedimentos de higienização. O procedimento cirúrgico é simples, podendo ser realizado pelo ortodontista; as formas dimensionais dos mini-parafusos são adequadas e estes são de fácil remoção após uso. Concluímos que o uso de mini-parafusos representa uma alternativa efetiva de ancoragem ortodôntica na verticalização de molares inferiores. Abstract in english Tooth movement frequently requires additional anchorage resources. Mini-screws have been used as a possible solution to this matter. The purpose of this study was to establish a method of mandibular molar uprighting, using mini-screw as anchorage, positioned on the mandibular external oblique line, [...] behind and posterior to the tooth. Three pacients with ages between 40 and 48 years old (two females and one male) were selected. The three of them presented mesially tipped molars, positioned posterior to the edentulous areas, on both sides of the mandible. These patients received orthodontic treatment during a period of 6 and 12 months with the MD3 technique. Titanium mini-screws were positioned bilaterally, under local anesthesia. One incision with 1 cm was done in each side of the mandibular external oblique line, distally to the tipped molars. After that, the mini-screws were positioned and sutures were done, leaving the mini-screws heads exposed. After one week, orthodontic loads (between 150 and 200 grams/force) were applied to the mini-screws through elastics. A certain degree of inflammation around the mini-screws was noticed, but it was controlled by hygienic procedure. This surgery procedure was simple and could be done easily by the orthodontist. The dimensions and shapes of the mini-screws proved to be appropriate and their removal after the orthodontic movement were done without difficulty. The result was time reduction on the molars uprighting, without side effects on the others teeth. The use of mini-screws seems to be a good alternative for an effective orthodontic anchorage on the uprighting mandibular molars.

  9. Evolución clínica de la pericoronaritis en terceros molares inferiores semirretenidos / Clinical evolution of pericoronitis in the third inferior semi-retained molars

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    Felicia C, Morejón Álvarez; Luis Enrique, Torres Rodríguez; Tailín, Morejón Álvarez; Alianna, Herrera Forcelledo.

    2010-06-01

    Full Text Available Se realizó un estudio longitudinal, prospectivo, analítico y descriptivo, con el objetivo de determinar la evolución clínica de la pericoronaritis en terceros molares inferiores semirretenidos, patología que aqueja a un porciento elevado de la población, siendo importante su diagnóstico y tratamient [...] o oportuno. Esta investigación se desarrolló en el Hospital General Docente Abel Santamaría Cuadrado, durante el período comprendido de enero a octubre de 2009. La muestra estuvo compuesta por 52 pacientes que asistieron a la consulta de cirugía maxilofacial, por presentar síntomas y signos clínicos propios de la pericoronaritis. Para el análisis estadístico se utilizaron como principales medidas los números absolutos y relativos, y las pruebas no paramétricas de ji cuadrado; se tomó como nivel de significación á-0,005. En los pacientes con pericoronaritis de terceros molares inferiores semirretenidos, la forma serosa fue la más frecuente con un 48%, siendo el dolor moderado el síntoma clínico de mayor incidencia en esta pericoronaritis, no así en la forma supurada, que en el 42,3% existía un dolor severo. Como otros síntomas clínicos presentes, surgieron la inflamación y enrojecimiento del tejido pericoronario en el 100% de los casos, seguido del trismo en un 86,53% y la presencia de pus en un 22%, que se hicieron más notables en la forma supurada de la pericoronaritis. Abstract in english A longitudinal, prospective, analytic and descriptive study was conducted aimed at determining the clinical evolution of pericoronitis in the third inferior semi-retained molars, a pathology that affects a high percent of the population, where the diagnosis and appropriate treatment is very importan [...] t. This research was carried out from January to October 2009 at "Abel Santamaria Cuadrado" University Hospital. The sample was comprised of 52 patients attending to the oral offices presenting clinical signs and symptoms of pericoronitis. Absolute and relative numbers, parametric chi-square test and the level of significance á- 0,005 were used to perform the statistical analysis. In patients presenting pericoronitis in the third inferior semi-retained molars were found: the serous form that was the most frequent with 48%, being the moderate pain the clinical symptoms that showed the highest incidence in this pericoronitis, that differed from the suppurated which presented 42,3% of severe pain. Other clinical symptoms suggested inflammation and flare of the pericoronary tissue in 100% of the cases, followed by trismus in 86, 53% and the presence of pus (22%), which were more notable in the suppurated form of pericoronitis.

  10. Sintesi sulla morfometria del primo molare inferiore nel gruppo Microtus (Terricola) savii

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    Armando Nappi; Sophie Montuire; Patrick Brunet-Lecomte

    2003-01-01

    Microtus (Terricola) savii è distribuito su quasi tutta la penisola italiana e la Sicilia. La sottospecie brachycercus, descritta su esemplari della Sila (Calabria), risulta essere buona specie da studi cromosomici. È stata testata la morfometria del primo molare inferiore tramite 27 variabili considerando 55 (di cui 2 fossili) popolazioni di M. savii (1351 denti) e 7 di Terricola calabresi (221 denti). Se il ...

  11. Valoración de la presencia y estado de erupción del tercer molar inferior en las fracturas del ángulo mandibular

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    José Manuel Díaz Fernández

    1998-12-01

    Full Text Available Se realizó un estudio prospectivo de 176 pacientes con fractura de mandíbula en el Servicio de Cirugía Maxilofacial del Hospital Provincial Docente «Saturnino Lora» de Santiago de Cuba, durante los años 1990-1995, con la finalidad de analizar la posible interrelación entre las fracturas del ángulo y la presencia y estado de erupción del tercer molar inferior. Se pudo comprobar que la incidencia de dichas fracturas era de gran significación cuando los terceros molares inferiores no erupcionados se hallaban presentes, que había una predisposición más marcada a la fractura del ángulo cuando ésta se producía bilateralmente, así como también que el tercer molar inferior no erupcionado debilitaba el ángulo de la mandíbula, tanto cualitativa como cuantitativamente; o sea, se demostró una relación directa entre la cantidad de espacio óseo ocupado por el tercer molar inferior no erupcionado y la debilidad del área del hueso.A prospective study was performed in 176 patients presenting mandibular factures, treated in Maxillofacial Surgery Service of «Saturnino Lora» Teaching Provincial Hospital, Santiago de Cuba (1990-1995, to analyse possible interrelation between angle fractures and presence and state of eruption of inferior third molars. We check out that incidence of such fractures was significant when non-erupted inferior third molars were present, a remarkable predisposition against angle fracture when this one was bilateral, as well as that non-erupted inferior third molars weakened mandibular angle, both qualitatively as quantitatively; that is, a direct relationship between amount of bone space, occupied by non erupted inferior third molar and weakness of bone area was proved.

  12. Valoración de la presencia y estado de erupción del tercer molar inferior en las fracturas del ángulo mandibular

    Scientific Electronic Library Online (English)

    José Manuel, Díaz Fernández; Ricardo, Pérez Arredondo; María de los A., Rodríguez Pérez; Maribel, Ruiz Pérez.

    1998-12-01

    Full Text Available Se realizó un estudio prospectivo de 176 pacientes con fractura de mandíbula en el Servicio de Cirugía Maxilofacial del Hospital Provincial Docente «Saturnino Lora» de Santiago de Cuba, durante los años 1990-1995, con la finalidad de analizar la posible interrelación entre las fracturas del ángulo y [...] la presencia y estado de erupción del tercer molar inferior. Se pudo comprobar que la incidencia de dichas fracturas era de gran significación cuando los terceros molares inferiores no erupcionados se hallaban presentes, que había una predisposición más marcada a la fractura del ángulo cuando ésta se producía bilateralmente, así como también que el tercer molar inferior no erupcionado debilitaba el ángulo de la mandíbula, tanto cualitativa como cuantitativamente; o sea, se demostró una relación directa entre la cantidad de espacio óseo ocupado por el tercer molar inferior no erupcionado y la debilidad del área del hueso. Abstract in english A prospective study was performed in 176 patients presenting mandibular factures, treated in Maxillofacial Surgery Service of «Saturnino Lora» Teaching Provincial Hospital, Santiago de Cuba (1990-1995), to analyse possible interrelation between angle fractures and presence and state of eruption of i [...] nferior third molars. We check out that incidence of such fractures was significant when non-erupted inferior third molars were present, a remarkable predisposition against angle fracture when this one was bilateral, as well as that non-erupted inferior third molars weakened mandibular angle, both qualitatively as quantitatively; that is, a direct relationship between amount of bone space, occupied by non erupted inferior third molar and weakness of bone area was proved.

  13. Má oclusão de Classe I com biprotrusão e ausência dos primeiros molares inferiores / Angle Class I malocclusion with bimaxillary dental protrusion and missing mandibular first molars

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    Aldino, Puppin Filho.

    2011-12-01

    Full Text Available O presente relato de caso descreve o tratamento ortodôntico de uma paciente de 24 anos de idade, portadora de má oclusão de Classe I de Angle, com protrusão dos incisivos superiores e inferiores, além de perda recente dos primeiros molares inferiores. O tratamento idealizado envolveu a exodontia dos [...] primeiros pré-molares superiores, aliada ao fechamento dos espaços presentes na arcada inferior. O resultado obtido demonstra a necessidade de planos de tratamento individualizados e a importância dos conceitos biomecânicos para movimentar adequadamente os dentes. Esse caso clínico foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO), representando a categoria livre escolha, como parte dos requisitos para obtenção do título de Diplomado pelo BBO. Abstract in english This case report describes the orthodontic treatment of a 24-year-old patient presenting with Angle Class I malocclusion, bimaxillary dental protrusion and recent loss of mandibular molars. Treatment involved extraction of the maxillary first premolars and closing of mandibular first molar spaces. T [...] reatment outcomes demonstrate the need for individualized treatment planning and highlight the key role played by biomechanical concepts in achieving proper orthodontic tooth movement. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO) as representative of the free choice category in partial fulfillment of the requirements for obtaining the BBO Diploma.

  14. Má oclusão de Classe I com biprotrusão e ausência dos primeiros molares inferiores Angle Class I malocclusion with bimaxillary dental protrusion and missing mandibular first molars

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    Aldino Puppin Filho

    2011-12-01

    Full Text Available O presente relato de caso descreve o tratamento ortodôntico de uma paciente de 24 anos de idade, portadora de má oclusão de Classe I de Angle, com protrusão dos incisivos superiores e inferiores, além de perda recente dos primeiros molares inferiores. O tratamento idealizado envolveu a exodontia dos primeiros pré-molares superiores, aliada ao fechamento dos espaços presentes na arcada inferior. O resultado obtido demonstra a necessidade de planos de tratamento individualizados e a importância dos conceitos biomecânicos para movimentar adequadamente os dentes. Esse caso clínico foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria livre escolha, como parte dos requisitos para obtenção do título de Diplomado pelo BBO.This case report describes the orthodontic treatment of a 24-year-old patient presenting with Angle Class I malocclusion, bimaxillary dental protrusion and recent loss of mandibular molars. Treatment involved extraction of the maxillary first premolars and closing of mandibular first molar spaces. Treatment outcomes demonstrate the need for individualized treatment planning and highlight the key role played by biomechanical concepts in achieving proper orthodontic tooth movement. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO as representative of the free choice category in partial fulfillment of the requirements for obtaining the BBO Diploma.

  15. Efecto del tratamiento quirúrgico de los terceros molares inferiores sobre el síndrome de disfunción temporomandibular

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    José Manuel Díaz Fernández

    1996-08-01

    Full Text Available Se realizó una investigación con la finalidad de determinar el efecto del tratamiento quirúrgico de los terceros molares inferiores no erupcionados sobre el síndrome de disfunción temporomandibular en 44 estudiantes, a quienes les efectuaron estudios clinicoestomatognáticos durante los períodos preoperatorio y posoperatorio. El índice de disfunción de Helkimo arrojó disfunción ligera en el 55 % y moderada en el resto durante la fase preoperatoria, mientras que el examen posoperatorio reveló disfunción ligera en el 45 % y moderada o severa en el 55 %. Se comprobaron notables cambios en el rango del movimiento mandibular durante la apertura bucal máxima y en los movimientos de lateralidad de la mandíbula.An investigation was conducted with the aim of determining the effect of surgical treatment of unerupted lower third molars on the temporomandibular joint dysfunction syndrome in 44 students who underwent clinical and stomatognathic studies during the preoperative and postoperative period. The index of Helkimo's dysfunction yielded a mild dysfunction in 55 % of cases, and a moderate dysfunction in the remaining patients during the preoperative phase, while the postoperative examination revealed a mild dysfunction in 45 % of patients and a moderate to severe dysfunction in 55 % of cases. Remarkable changes were proved regarding the rank of mandibular movement during maximum oral opening and in lateral movements of the jaw.

  16. Variations of interleukin-6 after surgical removal of lower third molars / Variaciones de la interleuquina-6 tras la cirugía del tercer molar inferior

    Scientific Electronic Library Online (English)

    Carmen, López Carriches; José Mª, Martínez-González; Manuel, Donado Rodríguez.

    2006-12-01

    Full Text Available Objetivos: Determinar si tras la cirugía del tercer molar inferior se produce una liberación de interleuquina-6 (IL-6) y comparar la cantidad de IL-6 en pacientes que tomaron AINES y en aquellos que tomaron glucocorticoides. Diseño del estudio: Estudio prospectivo sobre 73 pacientes sometidos a la e [...] xtracción quirúrgica de los terceros molares inferiores. Fueron divididos en dos grupos: De diclofenaco y de metilprednisolona. Se recogieron muestras de fluído crevicular gingival para valorar la liberación de interleuquina-6 tras la cirugía. Se usó el programa estadístico BMDP para hacer un amplio tratamiento de los datos. Resultados: Los niveles de IL-6 se elevaron tras la cirugía del tercer molar inferior permaneciendo elevados al séptimo día del postoperatorio, elevándose más a las 24 horas en el grupo de diclofenaco siendo esta diferencia significativa (0,008). Conclusiones: La IL-6 se eleva tras la cirugía del tercer molar inferior, presentando diferente comportamiento en los dos grupos de estudio. Abstract in english Objectives: To determine if there is a release of IL-6 after surgical removal of lower third molars and to compare the amount of IL-6 in patients treated with NSAID and in those treated with glucocorticoids. Study Design: Prospective study on 73 patients who attended the Oral Surgery Unit (Departmen [...] t of Medicine and Oral Surgery) in the Faculty of Odontology of the Universidad Complutense de Madrid for the surgical removal of their lower third molars. These patients were separated into two groups: the diclofenac group and the methylprednisolone group. A record card was completed with preoperative and postoperative epidemiological and clinic data. Samples of gingival crevicular fluid were collected in order to assess the release of interleukin-6 after surgery. In order to make a broad study of data, the BMDP program was used for statistical analysis. Results: Levels of IL-6 were higher after surgical extraction of lower third molars and remained high until the seventh day after. Levels were higher in the diclofenac group 24 hours after surgery, the difference was significant (0.008). Conclusions: IL-6 is higher after surgical extraction of lower third molars, behaving differently in each of the groups.

  17. Evaluation of accessory furcation canals of permanent mandibular molars using radiography and clearing / Avaliação do canal cavo-interradicular em molares inferiores permanentes através de Rx e diafanização

    Scientific Electronic Library Online (English)

    Leandro José Corrêa, Harb; Fernanda Lavarda, Ramos; Carine Weber, Pires; Maria Gabriela Pereira de, Carvalho; Katia Olmedo, Braun.

    2010-12-01

    Full Text Available OBJETIVO: Avaliar a presença do canal cavo-interradicular em molares inferiores permanentes através de radiografias e diafanização. METODOLOGIA: A amostra foi constituída por 344 molares inferiores re-hidratados, preparados e armazenados individualmente em recipientes de vidro. A presença do canal c [...] avo-interradicular foi investigada por um único operador treinado usando lupa (4x) para as radiografias e microscópio óptico odontológico (30x) para as amostras diafanizadas. Microscopia eletrônica de varredura (MEV) foi usada para verificar diferenças morfológicas do assoalho pulpar. RESULTADOS: A análise radiográfica mostrou que 9% das amostras tinham uma zona levemente radiolúcida, 2% mostravam uma imagem sugestiva, e 89% das amostras não tinham nenhuma evidência. Pela diafanização, o canal não foi encontrado nas amostras avaliadas. Pela MEV, as amostras recém extraídas mostraram com canalículos dentinários uniformes; as demais apresentaram pequenos sítios com canalículos uniformes. CONCLUSÃO: O exame radiográfico não foi o melhor método de diagnóstico; a diafanização é um excelente método avaliativo, pois permite a visualização tridimensional da anatomia interna dental em pesquisas in vitro. Abstract in english PURPOSE: To evaluate the presence of furcation canals of permanent mandibular teeth using radiography and a clearing technique. METHODS: The sample comprised 344 extracted mandibular molars. The presence of furcation canals was assessed by a single trained observer using magnifying lens (4x) for the [...] dental radiographs and a dental optical microscope (30x) for the cleared specimens. Scanning electron microscopy (SEM) was used to evaluate morphological differences in the pulp chamber floor. RESULTS: Radiographs showed that 9% of the specimens had radiolucent areas, 2% had an image that suggested a canal, and 89% had no abnormal findings. Clearing techniques did not show any accessory canal. SEM images revealed dentin tubules in recently extracted teeth; the other specimens had small areas with dentin tubules. CONCLUSION: Radiography was not better than the clearing technique to diagnose furcation canals. The clearing technique can provide three-dimensional visualization of the internal tooth anatomy for in vitro studies.

  18. Incidencia de las extracciones del primer molar inferior permanente en los ruidos articulares / Permanent lower first molar extraction incidence in articular noises

    Scientific Electronic Library Online (English)

    María Julia, López Vallejos; Carlos Eduardo, Buffil; María Mercedes, González.

    2015-06-01

    Full Text Available Los ruidos articulares se presentan frecuentemente en la práctica diaria odontológica, algunos son audibles a simple oído y en otros casos es necesario tener entrenado el oído ya que pueden resultar imperceptibles. Mediante un examen clínico y desarrollo de un protocolo destinado especialmente para [...] la articulación temporomandibular (ATM), los odontólogos registraron los datos en fichas individuales. Además se registraron los datos relacionados con la frecuencia de aparición según el sexo y la edad. Los resultados demostraron que la extracción prematura del primer molar inferior permanente no incide en la aparición de ruidos articulares. Abstract in english Articular noises are frequently present in the daily dental practice. Some are easily discernible, nevertheless, in some other cases a trained ear might be necessary to perceive them since they might be imperceptible. In the present study, by means of a physical examination and development of a spec [...] ifically TMJ-designed (temporomandibular joint) protocol dentists recorded data in individual files. Data related to onset frequency according to age and gender were equally recorded. Results revealed the fact that premature extraction of the permanent lower first molar did not bear influence on the onset of articular noises.

  19. A influência da perda bilateral do primeiro molar inferior permanente na morfologia dentofacial: um estudo cefalométrico / The influence of bilateral lower first permanent molar loss on dentofacial morfology: a cephalometric study

    Scientific Electronic Library Online (English)

    David, Normando; Cristina, Cavacami.

    2010-12-01

    Full Text Available OBJETIVO: avaliar as alterações cefalométricas em pacientes com perda bilateral do primeiro molar inferior permanente. MÉTODOS: foram analisadas 68 telerradiografias laterais de pacientes de consultórios particulares. A amostra foi dividida em dois grupos pareados quanto ao sexo e idade - 34 indivíd [...] uos sem perdas (grupo controle) e 34 com perda bilateral do primeiro molar inferior permanente (grupo com perda). Foram excluídos da amostra pacientes que haviam perdido outros dentes que não o primeiro molar inferior, casos de agenesia e pacientes com menos de 16 anos de idade. Buscou-se avaliar somente indivíduos que tivessem relatado a perda há pelo menos 5 anos. RESULTADOS: demonstraram que a perda bilateral do primeiro molar inferior permanente leva ao suave fechamento do ângulo GnSN (P=0,05), um giro anti-horário do plano oclusal (P=0,0001), uma suave diminuição da altura facial anteroinferior (P=0,05), uma acentuada inclinação lingual (P=0,04) e retrusão dos incisivos inferiores (P=0,03). Por outro lado, a perda bilateral do primeiro molar inferior permanente não foi capaz de influenciar a relação maxilomandibular no sentido anteroposterior (P=0,21), a quantidade de mento (P=0,45), a inclinação dos incisivos superiores (P=0,12) e a posição anteroposterior dos incisivos superiores (P=0,46). CONCLUSÃO: a perda bilateral dos primeiros molares inferiores é capaz de produzir alterações marcantes no posicionamento dos incisivos inferiores e no plano oclusal, além de uma suave redução vertical da face Abstract in english OBJECTIVE: To evaluate cephalometric changes in patients after bilateral loss of lower first permanent molar teeth. METHODS: Sixty-eight lateral radiographs of patients from private practices were analyzed. The sample was divided into two groups matched for age and gender: 34 individuals without los [...] s (control group) and 34 presenting with bilateral loss of lower first permanent molar teeth (loss group). Patients who had lost teeth other than first molars, cases of agenesis and patients under 16 years of age were excluded from the sample. Only individuals who reported losing teeth at least 5 years earlier were evaluated. RESULTS: It was found that bilateral loss of lower first permanent molars leads to smooth closure of GnSN angle (P=0.05), counterclockwise rotation of occlusal plane (P=0.0001), mild decrease in lower anterior face height (P=0.05), pronounced lingual tipping (P=0.04) and retrusion of mandibular incisors (P=0.03). Moreover, bilateral loss of lower first permanent molars did not affect the maxillomandibular relationship in the anteroposterior direction (P=0.21), amount of treatment (P=0.45), inclination of upper incisors (P=0.12) and anteroposterior position of maxillary incisors (P=0.46). CONCLUSION: Bilateral loss of lower first molars can produce marked changes in lower incisor positioning and in the occlusal plane as well as a mild reduction of the face in the vertical direction

  20. Comparación del postoperatorio de dos colgajos en cirugía de terceros molares inferiores Post operative comparison of two flap designs in lower third molar surgery

    Directory of Open Access Journals (Sweden)

    G. Laissle Casas del Valle

    2009-06-01

    Full Text Available La cirugía de terceros molares constituye en la práctica de la cirugía oral y maxilofacial, una de las intervenciones más realizadas. Las indicaciones son variadas, desde medidas profilácticas hasta grandes lesiones osteolíticas. Algunas de las consecuencias después de dicha intervención son; edema, trismus y dolor postoperatorio. En la técnica quirúrgica, el colgajo cobra gran importancia a la hora de minimizar estas consecuencias. El objetivo del presente estudio es evaluar el postoperatorio de la cirugía de terceros molares mandibulares incluidos, utilizando un colgajo lineal en un lado y un colgajo triangular en el otro lado del mismo paciente. Se realizó un estudio prospectivo en 15 pacientes de la Facultad de Odontología de la Universidad Mayor. Se tomaron registros fotográficos estandarizados y se midió la apertura bucal máxima pre-quirúrgica de cada paciente. Se registró el edema, la limitación de apertura bucal y el dolor a las 48 horas y a los 7 días, además del tiempo intraoperatorio. Todos los datos fueron analizados estadísticamente. No existen diferencias significativas en el edema, limitación de la apertura ni dolor al utilizar ambos colgajos. Tampoco existe correlación entre el tiempo operatorio y las tres variables estudiadas. El postoperatorio de la cirugía de terceros molares mandibulares incluidos es similar al utilizar un colgajo lineal o un colgajo triangular. El cirujano puede optar por uno o el otro indistintamente, según su preferencia.One of the most common procedures in the field of Oral and Maxillofacial Surgery is third molar surgery. From prophylactic measures to large osteolytic lesions, there are various indications. Some of the consequences of this procedure are; edema, trismus and postoperative pain. Flap design is an important feature of surgical technique that plays a vital role in minimizing these consequences. The objective of this study is a post operative evaluation of included third molar jaw surgery using a linear flap on one side and a triangular flap on the other side of the same patient. A prospective study of 15 patients from the Dentistry College at the Major University was carried out. Before surgery standard photos were taken and maximum oral opening was measured for each patient. The edema, maximum oral opening and pain were measured 48 hours and 7 days after surgery. All of the data were analyzed statistically. There are no significant differences in the edema, ability to open the mouth or the level of pain using the two types of flap. There also is no correlation between the operation time and the three variables studied. The postoperative edema, pain and trismus after included third molar surgery are similar when using linear or triangular flap designs. The surgeon can choose one or the other indistinctly, according to his/her preference.

  1. Diagnostic Accuracy of Panoramic Radiography in Determining the Position of Impacted Third Molars in Relation to the Inferior Dental Canal Compared with Surgery

    Directory of Open Access Journals (Sweden)

    F Ezoddini Ardakani

    2010-10-01

    Full Text Available Background/Objective: Extraction of the third lower molar tooth is one of the common surgical procedures that may lead to the damage of the infra-alveolar nerve. This damage could be related to deep impacted third molar teeth and roots close to the mandibular canal. Therefore, the radiography evaluation of the position of this tooth in relation to the inferior dental canal is important before surgery."nPatients and Methods: In this cross-sectional descriptive study, 59 patients who were referred to maxillofacial surgeons for third molar tooth surgery, and had a panoramic radiography were enrolled into the study. The positions of the impacted teeth in the panoramic radiography were determined according to their relation to the mandibular canal and were reported as five different subgroups (A, B, C, D and E. Cases which were not classified in any of these subgroups were considered as F. The surgeon also determined the position of the impacted teeth after surgery based on the mentioned classification. To assess the correlation of the data, Kappa analysis was used."nResults: Kappa statistics for agreement between radiography and surgery was 0.85 (p<0.001."nConclusion: According to this study, radiological assessment before third molar tooth surgery can reduce the risk of conceivable damage to the canal and nerve. It is recommended to consider the radiologists opinion before surgery.    

  2. Electromyographic Study of the Masseter Muscle after Lower Third Molar Surgery Estudio Electromiográfico del Músculo Masetero tras Cirugía de Tercer Molar Inferior

    Directory of Open Access Journals (Sweden)

    Tarley Eloy Pessoa de Barros

    2011-03-01

    Full Text Available Third molar extraction surgery is one of the most frequently performed procedures in the areas of buccal-maxillofacial traumatology and surgery. The post-surgery evolution was evaluated based on the clinical evidence obtained so far. The objective of this study was to analyze the post-surgery clinical evolution of the masseter muscle by means of surface electromyography, to evaluate muscle activity. Four analyses were performed: one pre-surgery, to register the normal activity, and three in post-surgery: on the 7th, 14th and 21st postoperative days, in a sample of 30 patients. On the 21st day, there was near normal recovery of the electrical signal of the masseter in women, but in men this activity did not reach normal levels. Surface electromyography is a safe and reliable tool for post-surgery evolution control of masseter function.La cirugía de extracción del tercer molar es uno de los procedimientos realizados con mayor frecuencia en las áreas de traumatología y cirugía buco-maxilofacial. La evolución post-quirúrgica fue evaluada sobre la base de la evidencia clínica obtenida hasta el momento. El objetivo de este estudio fue analizar la evolución clínica post-operatoria del músculo masetero por medio de electromiografía de superficie, para evaluar la actividad muscular. Fueron realizados cuatro análisis: uno previo a la cirugía, para registrar la actividad normal, y tres en la post-quirúrgica: en el día del 7, 14 y 21 postoperatorio, en una muestra de 30 pacientes. El día 21, hubo recuperación cercana a la normal de la señal eléctrica del músculo masetero en las mujeres, pero en los hombres esta actividad no alcanzó los niveles normales. La electromiografía de superficie es una herramienta segura y fiable para el control de la evolución post-quirúrgica de la función del músculo masetero.

  3. Electromyographic Study of the Masseter Muscle after Lower Third Molar Surgery / Estudio Electromiográfico del Músculo Masetero tras Cirugía de Tercer Molar Inferior

    Scientific Electronic Library Online (English)

    Tarley Eloy Pessoa de, Barros; Gabriel Denser, Campolongo; Reginaldo Perilo de, Oliveira; Nilton, Alves; Reinaldo José de, Oliveira.

    2011-03-01

    Full Text Available La cirugía de extracción del tercer molar es uno de los procedimientos realizados con mayor frecuencia en las áreas de traumatología y cirugía buco-maxilofacial. La evolución post-quirúrgica fue evaluada sobre la base de la evidencia clínica obtenida hasta el momento. El objetivo de este estudio fue [...] analizar la evolución clínica post-operatoria del músculo masetero por medio de electromiografía de superficie, para evaluar la actividad muscular. Fueron realizados cuatro análisis: uno previo a la cirugía, para registrar la actividad normal, y tres en la post-quirúrgica: en el día del 7, 14 y 21 postoperatorio, en una muestra de 30 pacientes. El día 21, hubo recuperación cercana a la normal de la señal eléctrica del músculo masetero en las mujeres, pero en los hombres esta actividad no alcanzó los niveles normales. La electromiografía de superficie es una herramienta segura y fiable para el control de la evolución post-quirúrgica de la función del músculo masetero. Abstract in english Third molar extraction surgery is one of the most frequently performed procedures in the areas of buccal-maxillofacial traumatology and surgery. The post-surgery evolution was evaluated based on the clinical evidence obtained so far. The objective of this study was to analyze the post-surgery clinic [...] al evolution of the masseter muscle by means of surface electromyography, to evaluate muscle activity. Four analyses were performed: one pre-surgery, to register the normal activity, and three in post-surgery: on the 7th, 14th and 21st postoperative days, in a sample of 30 patients. On the 21st day, there was near normal recovery of the electrical signal of the masseter in women, but in men this activity did not reach normal levels. Surface electromyography is a safe and reliable tool for post-surgery evolution control of masseter function.

  4. Segundo y tercer molar inferior izquierdo impactados. Presentación de un caso / Impacted second and third lower left molar. A case report

    Scientific Electronic Library Online (English)

    Luis, Hernández Pedroso.

    Full Text Available Introducción: los dientes impactados presentan variadas formas de presentación en cuanto a posición, diente involucrado y complicaciones asociadas. Objetivo: mostrar un caso poco frecuente de impactación de dientes continuos con las complicaciones y posibilidades terapéuticas implementadas. Presenta [...] ción del caso: presentamos el caso de una paciente femenina, 17 años, quien acude a la clínica de cirugía de la Facultad de Estomatología, en IBB, República de Yemen, por presentar dolor en hemiarcada inferior izquierda, al examen clínico se aprecia, 37 parcialmente erupcionado y ausencia de 38 en cavidad bucal. Se completa estudio con análisis radiográfico diagnosticando retención del 37 y 38, se decide exéresis quirúrgica del 37 y seguimiento de erupción del 38, asociado a terapéutica conservadora del 36 con severa lesión cariosa. Conclusiones: la valoración integral del paciente en casos de retenciones múltiples se hace necesaria para lograr el equilibrio funcional y estético como los obtenidos en casos como este. Abstract in english Introduction: the impacted teeth have several forms of presentation in position, involved tooth, and associated complications. Objective: to show an unfrequented case of impactation in neighbor teeth, with its complications and therapeutic solutions. Presentation of the case: the case is a female pa [...] tient, 17 years old, who came to service of surgery of dentistry college of IBB university, Yemen; due to she felt pain in left inferior dental arcade, in the clinical examination was observed the 37 partially erupted, and absent of the 38 in the oral cavity. A radiographic exam was done, diagnosing retention in 37 and 38. Surgical extraction of 37 was done and the eruption follows up of the 38, in association with a conservative treatment in the 36 due to severe carious lesion. Conclusions: the integral assessment is necessary in all patient with multiple retention to get the functional and aesthetic equilibrium like a result obtained in this case.

  5. Eficacia analgésica de diclofenaco versus metilprednisolona en el control del dolor postoperatorio tras la cirugía del tercer molar inferior / Analgesic efficacy of diclofenac versus methylprednisolone in the control of postoperative pain after surgical removal of lower third molars

    Scientific Electronic Library Online (English)

    Carmen, López Carriches; José Mª, Martínez-González; Manuel, Donado Rodríguez.

    2005-12-01

    Full Text Available Objetivo: Comparar la eficacia analgésica de la metilprednisolona (corticoide) versus diclofenaco (antiinflamatorio no esteroideo-AINE-) tras la cirugía del tercer molar inferior. Diseño del estudio: Estudio prospectivo sobre 73 pacientes sometidos a la extracción quirúrgica de los terceros molares [...] inferiores. Fueron divididos de forma aleatoria en dos grupos: De diclofenaco y de metilprednisolona. Se cumplimentó una ficha donde se hizo constar los datos epidemiológicos y clínicos preoperatorios y postoperatorios. La valoración del dolor se hizo mediante escala visual analógica y semicuantitativa y número de analgésicos de rescate consumidos. El control del dolor se hizo en la primera hora, a las 8 horas, 24 horas, 48 y 72 horas. Se usó el programa estadístico BMDP para hacer un amplio tratamiento de los datos. Resultados: En el dolor reflejado por los pacientes en la escala visual analógica no hubo diferencias de conjunto entre los dos grupos (aunque sí las hubo en ciertos momentos). Tampoco hubo diferencias en el número de analgésicos de rescate consumidos. Conclusiones. La reducción del dolor que se consigue con el corticoide no es significativa por lo que no está justificado su uso rutinario. Abstract in english Objetive: To compare the analgesic efficacy of methylprednisolone (corticoid) versus diclofenac (nonsteroidal antiinflammatory-NSAID-) after surgical removal of lower third molars. Study Design: Prospective study on 73 patients for the surgical removal of their lower third molars. These patients wer [...] e separated in two groups at random: a diclofenac group and a methylprednisolone group. A record card was filled in with preoperative and postoperative epidemiological and clinic data. The pain level assessment was made on a semiquantitative and an analogical visual scales and in relation to the amount of rescue analgesics consumed. Pain levels were measured at 1, 8, 24, 48 and 72 hours. In order to make a broad study of data, BMDP program was used for statistics. Results: In the pain described by patients in the analogical visual scale there were no differences between groups as a whole. There were no differences in the amount of rescue analgesics consumed. Conclusions. There is less pain in the corticoid group but not as to justify its routine use.

  6. Correlation between radiographic signs of third molar proximity with inferior alveolar nerve and postoperative occurrence of neurosensory disorders: A prospective, double-blind study

    Scientific Electronic Library Online (English)

    Fábio Wildson Gurgel, Costa; Erick Helton Lima, Fontenele; Tácio Pinheiro, Bezerra; Thyciana Rodrigues, Ribeiro; Bárbara Gressy Duarte Souza, Carneiro; Eduardo Costa Studart, Soares.

    2013-03-01

    Full Text Available PURPOSE: To evaluate the interference of radiographic factors in the appearance of sensory deficit related to inferior alveolar nerve (IAN) after third molars (3Ms) removal. METHODS: A prospective, double-blind, observational, unicentric study was performed with 126 patients submitted to a surgical [...] procedure of lower 3Ms removal in the period from March to October/2011. Collected data included gender, age, eruption stage of 3Ms, position/angle of 3Ms (Pell-Gregory and Winter classifications, respectively), presence/absence of radiographic signs of 3Ms proximity with the inferior alveolar canal and surgical technique. Occurrence evaluation of the IAN injury was performed on the seventh postoperative day through pin-prick, two-point discrimination and brush directional stroke tests. RESULTS: Predominant radiographic signs were: narrowing of the inferior alveolar canal (68.25%), darkening of root (46.82%) and diversion of the canal (31%). None of the patients presented sensory loss. Sixty-one (48.41%) of the cases had at least one or two radiographic signs of proximity with NAI. Forty-seven (37.3%) had 3 or more signs, and 18 (14.29%) did not have any radiographic signs of proximity to mandibular canal. CONCLUSION: There was not a positive correlation between presence of radiographic signs of 3Ms with IAN proximity and postoperative neurosensory disorders occurrence.

  7. Inferior alveolar nerve damage following removal of mandibular third molar teeth. A prospective study using panoramic radiography.

    Science.gov (United States)

    Smith, A C; Barry, S E; Chiong, A Y; Hadzakis, D; Kha, S L; Mok, S C; Sable, D L

    1997-06-01

    Permanent alteration of sensation in the lip after the removal of mandibular third molar teeth is an unusual but important complication. Studies have been performed to assess the risk of nerve damage but most of these have been retrospective and poorly controlled. This prospective trial predicted the outcome of altered sensation prior to surgery based on assessment of a panoramic radiograph and correlated this with the result postoperatively in the consecutive removal of 479 third molar teeth. Results indicated that 5.2 per cent had transient alteration in sensation but only one patient (0.2 per cent) had prolonged anaesthesia. As 94.8 per cent of teeth extracted had no neurological sequelae the figures for prediction were skewed and a kappa statistical analysis of 0.27 illustrated a fair level of agreement between prediction and outcome. This study supports previously reported levels of neurological damage and confirms that panoramic radiography is the optimum method for radiological assessment for mandibular third molar teeth prior to their removal. PMID:9241922

  8. Comparative study of the anesthetic efficacy of 4% articaine versus 2% lidocaine in inferior alveolar nerve block during surgical extraction of impacted lower third molars

    Scientific Electronic Library Online (English)

    Alejandro, Sierra Rebolledo; Esther, Delgado Molina; Leonardo, Berini Aytés; Cosme, Gay Escoda.

    2007-03-01

    Full Text Available Objetivo: Valorar y comparar la eficacia anestésica de la Articaína al 4% respecto a la Lidocaína al 2%, ambas con una concentración de 1:100.000 de epinefrina en el bloqueo troncal del nervio alveolar inferior durante la extracción quirúrgica de terceros molares inferiores incluidos. Diseño del est [...] udio: Se realizó un ensayo clínico aleatorio a doble ciego en una muestra de 30 pacientes programados para las extracciones quirúrgicas bilaterales de terceros molares inferiores simétricos en el Servicio de Cirugía Bucal del Máster de Cirugía e Implantología Bucal de la Universidad de Barcelona. Previo consentimiento del paciente, dos operadores efectuaron las intervenciones quirúrgicas de forma extemporánea, utilizando como anestésico local la Articaína al 4% o la Lidocaína al 2 % con la misma concentración de vasoconstrictor (epinefrina 1:100.000). Las variables estudiadas para cada anestésico fueron: tiempo de latencia (o de inicio del efecto anestésico), duración del efecto anestésico, cantidad de solución anestésica utilizada y la necesidad de reanestesiar la zona operatoria. Se utilizó una escala analógica visual para valorar la cantidad de dolor experimentado durante el acto quirúrgico y, así, evaluar subjetivamente la profundidad anestésica de las dos soluciones. Resultados: Se observaron diferencias estadísticamente significativas (p= .003) en cuanto a la duración del efecto anestésico, que fue mayor para la artcaína al 4% (220,8 minutos), respecto a la lidocaína al 2% (168,20 minutos). En las variables tiempo de latencia, cantidad de solución anestésica utilizada y necesidad de reanestesiar el campo operatorio se evidenciaron diferencias clínicas a favor de la articaína, aunque estas diferencias no fueron estadísticamente significativas. La valoración cualitativa de los anestésicos mediante la escala analógica visual mostró similitud en el dolor experimentado por los pacientes con ambos anestésicos. Conclusiones: De acuerdo con los resultados obtenidos se puede afirmar que la articaína al 4% muestra mejores características clínicas que la lidocaína al 2%, especialmente en cuanto al tiempo de latencia y duración del efecto anestésico. Sin embargo, no hubieron diferencias estadísticamente significativas que confirmen la superioridad de una solución respecto a la otra, al valorar la eficacia anestésica. Abstract in english Background: A comparative study is made of the anesthetic efficacy of 4% articaine versus 2% lidocaine, both with epinephrine 1:100,000, in truncal block of the inferior alveolar nerve during the surgical extraction of impacted lower third molars. Study design: A randomized double-blind clinical tri [...] al was conducted of 30 patients programmed for the bilateral surgical extraction of symmetrical lower third molars in the context of the Master of Oral Surgery and Implantology (University of Barcelona, Barcelona, Spain). Following the obtainment of informed consent, two operators performed surgery on an extemporaneous basis, using as local anesthetic 4% articaine or 2% lidocaine with the same concentration of vasoconstrictor (epinephrine 1:100,000). The study variables for each anesthetic were: latency (time to action) and duration of anesthetic effect, the amount of anesthetic solution used, and the need of re-anesthetize the surgical zone. A visual analog scale was used to assess pain during surgery, and thus subjectively evaluate the anesthetic efficacy of the two solutions. Results: Statistically significant differences (p = 0.003) were observed in the mean duration of anesthetic effect (220.86 min. for 4% articaine vs. 168.20 min. for 2% lidocaine). Latency, the amount of anesthetic solution and the need to re-anesthetize the surgical field showed clinical differences in favor of articaine, though statistical significance was not reached. The pain scores indicated similar anesthetic efficacy with both solutions. Conclusions: The results obtained suggest that 4% articaine offers better clinical performance than 2

  9. Eficacia analgésica del diclofenaco sódico vs. ibuprofeno después de la extracción quirúrgica de un tercer molar inferior incluido / Analgesic efficacy of diclofenac sodium versus ibuprofen following surgical extraction of impacted lower third molars

    Scientific Electronic Library Online (English)

    Vicenç, Esteller Martínez; Jordi, Paredes García; Eduard, Valmaseda Castellón; Leonardo, Berini Aytés; Cosme, Gay-Escoda.

    2004-12-01

    Full Text Available -Objetivo: En este estudio evaluamos la eficacia analgésica del diclofenaco sódico en comparación con el ibuprofeno, después de la extracción quirúrgica de un tercer molar inferior incluido. -Diseño de estudio: Los pacientes que participaron en el estudio fueron distribuidos de forma aleatoria en do [...] s grupos. Uno fue el grupo ibuprofeno y el otro el grupo diclofenaco. La intervención practicada fue la extracción quirúrgica de un tercer molar inferior cuya dificultad fue determinada en función del grado de inclusión en todos los pacientes. Las variables registradas fueron la intensidad del dolor y la necesidad de medicación de rescate durante un periodo de una semana. Los registros se realizaron una vez al día a la misma hora y registrados en un cuaderno por parte del paciente. -Resultados: Un total de 81 pacientes (87.1%) fueron incluidos en el estudio. Los valores fueron similares en las primeras 48 horas postoperatorias, pero a partir del tercer día existió una tendencia del grupo diclofenaco a mostrar valores de dolor superiores, aunque sin llegar a existir diferencias estadísticamente significativas (p>0.05). Esta tendencia a presentar mayor dolor durante el periodo postoperatorio en el grupo diclofenaco también se vio reflejada en el requerimiento del analgésico de rescate y en el número de comprimidos empleados. -Conclusiones: No se evidenciaron diferencias estadísticamente significativas en cuanto a la eficacia analgésica del diclofenaco sódico respecto al ibuprofeno, aunque sí pudo observarse una mayor tendencia hacia la necesidad de más medicación suplementaria durante los 2 primeros días del postoperatorio en el grupo diclofenaco pero sin adquirir significación estadística (p>0.05). Abstract in english -Objective: An evaluation is made of the analgesic efficacy of diclofenac sodium versus ibuprofen after impacted lower third molar surgery. -Study design: The patients were randomly assigned to one of two groups (ibuprofen or diclofenac). The difficulty of third molar surgery, performed under local [...] anesthesia, was assessed by the degree of inclusion involved. The recorded study variables were pain intensity and the need for rescue medication during one week. The recordings were made once a day at the same time, using a patient-completed questionnaire. -Results: Eighty-one patients were finally included in the study (87.1%). The results were similar in the first 48 postoperative hours in both groups, though on the third day the diclofenac group tended to show higher pain scores - the differences being nonsignificant, however (p>0.05). This tendency was also reflected by an increased need for rescue medication and the consumption of a larger number of tablets in the diclofenac group. -Conclusions: There were no statistically significant differences in analgesic efficacy between diclofenac sodium and ibuprofen, though the former was associated with an increased need for supplementary medication in the first two postoperative days (p>0.05).

  10. Using an operating microscope to re-treat an inferior premolar with two canals / Uso do microscópio operatório no retratamento de um pré-molar inferior com dois canais

    Scientific Electronic Library Online (English)

    Janaína Fernandes, SANTOS; Gustavo Moreira, ALMEIDA; Eduardo Fernandes, MARQUES; Carlos Eduardo da Silveira, BUENO.

    2014-12-01

    Full Text Available O artigo tem como objetivo apresentar um caso clínico de retratamento endodôntico realizado em um pré-molar inferior esquerdo com dois canais de difícil localização, onde é discutida a importância dos conhecimentos anatômicos e o uso do microscópio operatório, sobretudo em reintervenções complexas. [...] Realizou-se um retratamento endodôntico no elemento 34, possuidor de restauração protética e fístula por vestibular. No exame clínico, constatou-se resultado negativo ao teste de sensibilidade e resultado positivo ao teste de percussão vertical. Após remoção de todo o material obturador existente, o microscópio operatório foi solicitado para avaliação de uma possível fratura ou presença de outro canal. Foi constatada a presença de outro canal, o qual foi tratado e obturado como o já existente. Após 12 meses, novo exame radiográfico foi feito e constatou-se normalidade radiográfica e assintomatologia. Em casos mais complexos e com anatomia peculiar torna-se imprescindível a utilização do microscópio operatório no auxílio à localização de um canal extra para o sucesso do tratamento. Abstract in english This report aims to present a clinical case of endodontic re-treatment performed on a left inferior premolar with two canals of difficult localization. The importance of anatomical knowledge and the use of an operating microscope, especially in complex reintervention are discussed. An endodontic re- [...] treatment was performed on element 34, which had a prosthetic restoration and vestibular fistula. In clinical examination, it was observed a negative result to the sensitization test and a positive result to vertical percussion test. After all the obturating material was removed, an operating microscope was requested to assess a possible fracture or the presence of another canal. It was noticed the presence of another canal that was treated and obturated as the existing canal. After 12 months, a new radiographic exam was performed, whose result was found asymptomatic and radiographically normal. In complex peculiar anatomy cases, the operating microscope is vital for the localization of extra canal to guarantee treatment success.

  11. Location and angulation of curvatures of mesiobucal canals of mandibular molars debrided by three endodontic techniques Posição e angulação de curvaturas radiculares em canais mesiobucais de molares inferiores preparados por três técnicas endodônticas

    Directory of Open Access Journals (Sweden)

    Isa Geralda Teixeira Constante

    2007-03-01

    Full Text Available The aim of this study was to assess the correlation between the degree of angulation and the position of root curvatures and their influence on the comparative results between the performances of the Progressive, Staged and Serial Preparation Techniques. The mesiobucal canals of 70 extracted mandibular molars were filled with a radiological contrast of 100% Barium sulphate and radiographed with a direct digital radiographic system, in an apparatus that guarantees that the samples remain in the same spatial position at all times. The images were then analyzed in the Coreldraw 10 program (MicroSafe, RJ, Brasil in accordance with two criteria: the methods of Berbert, Nishiyama¹ (1994 and Schneider11 (1971 to determine the position and the angle of the root curvatures, respectively. Initially, the possibility of correlation between these two variables was studied. The teeth were then selected according to angulation (greater than 25 degrees and position of root curvatures (cervical, median and apical in order to perform the endodontic techniques. After preparation, the samples were radiographed again and the images were superimposed in order to compare the pre- and post-operative areas. The difference between them showed the percentage of widening for each technique. The results showed that there was no correlation between the angulations and the root curvature positions, and that the different positions did not interfere in the performance of the techniques. The Progressive Preparation technique produced the highest widening values for all the groups, irrespective of the root curvature position.O objetivo deste trabalho foi verificar a correlação entre o grau de angulação e a posição das curvaturas radiculares, e a sua influência nos resultados comparativos entre os desempenhos das técnicas do Preparo Progressivo, Escalonada e Seriada. Os canais mésio-vestibulares de 70 dentes molares inferiores extraídos foram preenchidos com um contraste radiológico de sulfato de Bário a 100% e radiografados em um sistema de radiografia digital direta, em um aparato que garantia que as amostras ficassem sempre na mesma posição espacial. As imagens foram, então, analisadas no programa Coreldraw 10 (MicroSafe, RJ, Brasil segundo dois critérios: os métodos de Berbert, Nishiyama¹ (1994 e de Schneider11 (1971 para determinação da posição e do ângulo das curvaturas radiculares, respectivamente. Estudou-se inicialmente a possibilidade de correlação entre essas duas variáveis. Os dentes foram, então, selecionados segundo a angulação (superior a 25 graus e posição das curvaturas radiculares (cervical, mediana e apical para a realização das técnicas endodônticas. Após os preparos, as amostras foram novamente radiografadas e as imagens sobrepostas para a comparação das áreas pré e pós-operatórias. A diferença entre elas mostrou a porcentagem de alargamento para cada técnica. Os resultados mostraram não existir correlação entre as angulações e as posições das curvaturas radiculares, e que as diferentes posições não interferem no desempenho das técnicas. A técnica do Preparo Progressivo mostrou maiores valores de alargamento para todos os grupos, independentemente da posição da curvatura radicular.

  12. Estudo comparativo entre dois protocolos anestésicos envolvendo bloqueio do nervo alveolar inferior convencional e de Vazirani-Akinosi para exodontia de terceiro molar inferior / Comparative study of two anaesthetic protocols involving conventional and Vazirani-Akinosi alveolar inferior nerve block for lower third molar extraction

    Scientific Electronic Library Online (English)

    Danilo de Paula Ribeiro, Borges; Liane Maciel de Almeida, Souza; Maria Luisa Silveira, Souto; Liliane Poconé, Dantas; Mônica Silveira, Paixão; Francisco Carlos, Groppo.

    2014-01-01

    Full Text Available INTRODUÇÃO: O bloqueio do nervo alveolar inferior (BNAI) apresenta alta porcentagem de falha na Odontologia. A fim de melhorar esse índice, vêm-se estudando diferentes alternativas, como diferentes técnicas e soluções anestésicas. OBJETIVO: Avaliar duas diferentes técnicas - técnica convenciona [...] l e de Vazirani-Akinosi - para o bloqueio do nervo alveolar inferior, bem como compará-las quanto à sua efetividade e quantificar o percentual de aspirações positivas nas duas diferentes técnicas. MATERIAL E MÉTODO: Foram avaliados 160 pacientes de ambos os sexos, sendo 80 submetidos ao bloqueio do nervo alveolar inferior de Vazirani-Akinosi e bloqueio do nervo bucal (G1), e 80 submetidos ao bloqueio do nervo alveolar inferior convencional e ao bloqueio do nervo bucal (G2). Em ambos os grupos, utilizou-se a combinação de articaína 4% com epinefrina 1:100.000 para bloqueio do nervo bucal, e lidocaína 2% com epinefrina 1:100.000 para bloqueio do nervo alveolar inferior. Foram avaliados: a quantidade de aspirações positivas, a eficácia da anestesia e o momento em que ocorreu a falha anestésica durante o procedimento cirúrgico. RESULTADO: Não houve diferenças estatisticamente significantes (p = 0,2453) entre os grupos G1 e G2 observando-se a eficácia e o índice de aspirações positivas, e o momento em que ocorreu a falha anestésica, observando-se uma maior eficácia de ambas as técnicas, quando comparadas com a literatura (90%) CONCLUSÃO: Não houve diferença significativa entre o BNAI pela técnica convencional e o BNAI pela técnica de Vazirani-Akinosi quanto a quantidade de aspirações positivas e eficácia, sendo que o uso da articaína 4% com epinefrina 1:100.000 no bloqueio do nervo bucal possivelmente aumentou a eficácia anestésica de ambas as técnicas. Abstract in english INTRODUCTION: The inferior alveolar nerve block has a high percentage of failure in dentistry. To improve this ratio, has been studied different alternatives, as different techniques, as well as anesthetics. OBJECTIVE: Evaluate two different techniques (conventional technique and Vazirani-Akino [...] si) for inferior alveolar nerve block, and compare them regarding their effectiveness and quantify the percentage of positive aspirations in both techniques. MATERIAL AND METHOD: 160 patients were evaluated for both sex, with 80 undergoing Vazirani-Akinosi technique plus buccal nerve block (G1), and 80 to conventional inferior alveolar nerve block plus buccal nerve block (G2), both groups using a combination of 4% articaine with 1:100.000 epinephrine to buccal nerve block and 2% lidocaine with 1:100.000 epinephrine to inferior alveolar nerve block. We evaluated the amount of positive aspirations, the effectiveness or not of anesthesia (pain) and when it occurred during the surgical procedure. RESULT: There were no statistically significant differences (p = 0.2453) between G1 and G2 observing the positive aspiration. It was obtained efficiency of 90% for both techniques. CONCLUSION: No significant difference between the conventional alveolar inferior nerve block technique and Vazirani-Akinosi alveolar nerve block technique considering the amount of positive aspirations and efficacy, and the use of 4% articaine with 1:100.000 epinephrine in buccal nerve block possibly increased the anesthetic efficacy of both techniques.

  13. Uso de metilprednisolona versus diclofenaco en el control de la inflamación y el trismo tras la cirugía del tercer molar inferior / The use of methylprednisolone versus diclofenac in the treatment of inflammation and trismus after surgical removal of lower third molars

    Scientific Electronic Library Online (English)

    Carmen, López Carriches; José Mª, Martínez González; Manuel, Donado Rodríguez.

    2006-09-01

    Full Text Available Objetivo: Comparar el efecto sobre la inflamación y el trismo de la metilprednisolona (corticoide) versus diclofenaco (antiinflamatorio no esteroideo-AINE-) tras la cirugía del tercer molar inferior. Diseño del estudio: Estudio prospectivo sobre 73 pacientes sometidos a la extracción quirúrgica de l [...] os terceros molares inferiores. Fueron divididos de forma aleatoria en dos grupos: De diclofenaco y de metilprednisolona. Se cumplimentó una ficha donde se hizo constar los datos epidemiológicos y clínicos preoperatorios y postoperatorios en relación a la inflamación y el trismo (tres medidas faciales y apertura bucal). Se usó el programa estadístico BMDP para hacer un amplio tratamiento de los datos. Resultados: A las 24 horas el grupo tratado con diclofenaco presentaba mayor inflamación en una de las medidas faciales (p Abstract in english Objective: To compare the efficacy of methylprednisolone (corticoid)versus diclofenac (nonsteroidal anti-inflammatory -NSAID-) in the treatment of inflammation and trismus after the surgical removal of lower third molars. Study design: Prospective study on 73 patients for the surgical removal of the [...] ir lower third molars. These patients were separated in two groups at ramdom: the diclofenac group and the methylprednisolone group. A record card was filled in with preoperative and postoperative epidemiological and clinic data about inflammation and trismus (three facial measures and mouth opening). In order to make a broad study of data, BMDP program was used for statistics. Results: 24 hours after surgery, patients in the diclofenac group showed a more severe inflammation in one of the facial measurements (p

  14. Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation / Aproximación a Segmentos de Línea Recta en la Curva Existente del Canal Radicular Mesiobucal Ligeramente Curvado del Primer Molar Inferior: Una Investigación Radiográfica

    Scientific Electronic Library Online (English)

    J, Prabhakar; M. S, Priya; L. Jones Tarcius, Doss; V. G, Sukumaran.

    2013-03-01

    Full Text Available El objetivo de este estudio fue investigar radiográficamente la curva existente en el canal radicular mesiobucal ligeramente curvado del primer molar inferior mediante la aplicación de aproximaciones a segmentos de línea recta. Se utilizaron molares inferiores humanos extraídos que fueron radiografi [...] ados. Fueron seleccionadas, según el método de Schneider, 100 radiografías cuyo canal mesiobucal mostró una ligera curvatura (10-20°). Las curvas fueron delineadas y analizadas mediante el método de aproximación a segmentos de línea recta. Cada curva se consideró como una unidad que consta de seis diferentes segmentos de línea recta que unen a siete puntos específicos y el ángulo de curvatura en estos puntos se determinó utilizando la fórmula de la pendiente. Todas las curvas analizadas en este estudio tenían diversos grados de curvaturas en diferentes puntos de la curva. La curvatura máxima (0,40°) se registró en el tercio medio del canal radicular. Dentro de la limitación del estudio, una curvatura significativa se produce a través de la curva existente en el canal mesiobucal del primer molar inferior y el tercio medio de la curva que muestra un mayor grado de curvatura. Existe la posibilidad que ocurra una mayor curvatura en el tercio coronal de la curva. Aunque un estudio tridimensional sería más apropiado, la aproximación a segmentos de línea recta puede ser un mejor método que los existentes para simular la geometría del canal. Abstract in english The aim of this study was to radiographically investigate the curve existing in slightly curved mesiobuccal canal of mandibular first molar by applying Piecewise straight line approximation. Extracted human mandibular molars were radiographed and one hundred radiographs were selected whose mesiobucc [...] al canal showed slight curvature (10-20°) according to Schneider's method. The curves were traced and analyzed using Piecewise straight line method. Each curve was considered as a unit consisting of six different pieces of straight lines joining at seven specific points and the angle of curvature at these points was determined using the slope formula. All curves analyzed in this study had varying degrees of curvatures at different points on the curve. Maximum curvature (0.40°) was recorded at the middle third of the root canal. Within the limitation of the study, significant curvature occurs through out the curve existing in the mesiobuccal canal of mandibular first molar and the middle third of the curve showing greater degree of curvature. There is a possibility of greater curvature occurring in the coronal third of the curve. Though three dimensional studies would be more appropriate, Piecewise straight line approximation may be a better method than existing methods to simulate canal geometry.

  15. Lower third molar fused with a supernumerary tooth: diagnosis and treatment planning using Cone-Beam Computed Tomography / Terceiro molar inferior fusionado com um supranumerário: diagnóstico e plano de tratamento usando Tomografia Computadorizada Volumétrica

    Scientific Electronic Library Online (English)

    Osny, FERREIRA-JÚNIOR; Luciana Dorigatti de, ÁVILA; Marcelo Bonifácio da Silva, SAMPIERI; Eduardo, DIAS-RIBEIRO.

    2014-12-01

    Full Text Available Fusão é a união de dois germes dentários em desenvolvimento, resultando numa única estrutura dentária, podendo ocorrer entre dois germes dentários normais ou entre o germe de um dente normal com um supranumerário. Dentes supranumerários são dentes adicionais à série normal e podem ocorrer em qualque [...] r região da arcada dentária, entretanto, são mais comumente encontrados na maxila do que na mandíbula. O presente artigo ilustra um caso de fusão entre um terceiro molar mandibular e um dente supranumerário, onde foi realizada uma intervenção cirúrgica com o objetivo de remover os elementos dentários. Para complementar o diagnóstico, além da radiografia panorâmica, utilizou-se a técnica radiográfica de Donovan, mas, devido à proximidade do elemento dental com o ramo mandibular, não foi possível determinar um diagnóstico preciso de fusão. Sendo assim foi utilizada a Tomografia Computadorizada Volumétrica que fornece informações precisas e em três dimensões, possibilitando desta forma chegar ao diagnóstico de fusão e também auxiliando no planejamento cirúrgico. Abstract in english Fusion is the union of two developing dental germs, resulting in a single large dental structure. It involve two normal dental germs or the germ of a normal tooth with a germ of a supernumerary one. Supernumerary teeth are additional teeth of the normal series which may occur in any region of the de [...] ntal arch, althoug they are more common in the maxilla than in the mandible. This article presents a case of fusion between a third molar and a supernumerary tooth, in which a surgical intervention was carried out, with the objective of removing the dental elements. The panoramic radiography was complemented by the Donovan´s radiographic technique, but because of the proximity of the dental element to the mandibular ramus, it was not possible to have a final fusion diagnosis. Hence, the Cone-Beam Computed Tomography which provides precise three-dimensional information, was used to determinate the fusion diagnosis and also to help in the surgical planning.

  16. Comparison of the cleaning efficacy of the FKG race system and hand instrument in molar root canal / Comparação da eficácia de limpeza entre o sistema FKG race e instrumentos manuais em molares inferiores

    Scientific Electronic Library Online (English)

    Carla Renata, Sipert; Renata Pardini, Hussne; Celso Kenji, Nishiyama.

    2006-01-01

    Full Text Available Objetivo deste trabalho foi avaliar a capacidade de limpeza de canais radiculares por meio do sistema de instrumentação RaCe (FKG Dentaire - La-Cheaux-de Fonds - Suíça) em comparação à instrumentação manual por meio de limas tipo K-File (Maillefer Instruments - Ballaigues - Suíça). Foram selecionado [...] s 20 dentes humanos extraídos (molares superiores) que tiveram seu conteúdo radicular removido após realização da abertura coronária. Os canais foram preenchidos com corante (tinta nanquim) e após 48 horas para secagem, realizou-se a odontometria da raiz mésio-vestibular. Metade dos espécimes foi instrumentada pela técnica de Oregon modificada e a outra metade pela seqüência crown-down preconizada pelo fabricante do sistema RaCe. Após o preparo, os dentes foram seccionados longitudinalmente e avaliados de acordo com a quantidade de corante remanescente. Os dados obtidos foram registrados por meio de escores numéricos e as médias aritméticas foram analisadas entre os grupos pelo teste de Mann Whitney. Ambas as técnicas foram incapazes de limpar completamente o interior dos canais radiculares sendo que a técnica manual desempenhou limpeza significantemente superior apenas no terço médio. Conclui-se que o sistema RaCe foi capaz de desempenhar uma limpeza satisfatória sendo próxima àquela conseguida pela técnica de instrumentação manual. Abstract in english INTRODUCTION AND OBJECTIVE: The aim of this study was to evaluate the ability of root canal cleaning of the RaCe rotary instrumentation system (FKG Dentaire - La-Cheaux-de Fonds - Switzerland), compared to manual filing with Stainless Steel K-files (Maillefer Instruments - Ballaigues - Switzerland). [...] MATERIAL AND METHOD: Twenty extracted human teeth (maxillary molars) were selected and their pulp tissue was removed after coronal access. The root canals were filled with a dye (India ink) and allowed to dry for 48 hours, followed by establishment of the working length of the mesiobuccal root; then, half of the specimens were instrumented by the modified Oregon technique and the other half were instrumented by crown-down sequence of the RaCe system. After preparation, the teeth were longitudinally sectioned and evaluated according to the amount of remaining dye. RESULTS: Data obtained were registered as numerical scores, and the arithmetic means were compared between groups using the Mann Whitney test. Both techniques were unable to completely clean the interior of the root canals, with a better performance of the manual technique only at the middle third. CONCLUSION: It could be concluded that the RaCe system was able to provide satisfactory cleaning, similar to that obtained by the manual instrumentation technique.

  17. Enamel defects in permanent first molars and incisors in individuals with cleft lip and/or palate / Defectos de esmalte en primeros molares e incisivos en individuos con fisura labial y/o palatina

    Scientific Electronic Library Online (English)

    Vivian Patricia, Saldias-Vargas; Marcos Roberto, Tovani-Palone; Ana Paula, Moura-Martins; Gisele, da Silva-Dalben; Marcia, Ribeiro-Gomide.

    2014-10-01

    Full Text Available Antecedentes. Los defectos de esmalte son comunes en los incisivos superiores deciduos y permanentes de individuos con fisura de labio y paladar; su ocurrencia ha sido asociada con la fisura, especialmente cuando el alveolo es afectado. Objetivo. Comparar la prevalencia de defectos de esmalte en inc [...] isivos centrales y primeros molares superiores e inferiores permanentes de individuos con fisura labiopalatina, fisura palatina y sin fisura. Materiales y métodos. El estudio analizó el caso de 150 individuos -50 con fisura labiopalatina, 50 con fisura palatina y 50 sin fisura- de ambos géneros entre 6 y 12 años. La frecuencia, extensión y localización de las alteraciones de esmalte en la superficie vestibular de los dientes fue evaluado por el índice DDE modificado. Resultados. Hubo mayor manifestación de defectos de esmalte en incisivos y molares superiores en los grupos con fisuras, con diferencia estadística significativa comparada con el grupo sin fisura. Conclusiones. La ocurrencia de defectos de esmalte fue común en incisivos y molares permanentes y estuvo significativamente asociada a las fisuras. Abstract in english Background. Enamel defects are common in deciduous and permanent maxillary incisors of individuals with lip and palate cleft, and their occurrence has been associated with the cleft, especially when the alveolus is affected. Objective. To compare the prevalence of enamel defects in permanent maxilla [...] ry and mandibular central incisors and first molars of individuals with cleft lip and palate, cleft palate, and without clefts. Materials and methods. The study analyzed the case of 150 individuals -50 with cleft lip and palate, 50 with cleft palate and 50 without clefts-, of both genders and aged 6 to 12 years. The frequency, extent, and location of enamel alterations on the buccal aspect of teeth were evaluated by the modified DDE index. Results. There was a greater manifestation of enamel defects in maxillary incisors and molars in groups with clefts, with statistically significant difference compared with the noncleft group. Conclusions. The occurrence of enamel defects was common in permanent incisors and molars and was significantly associated with clefts.

  18. Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation Aproximación a Segmentos de Línea Recta en la Curva Existente del Canal Radicular Mesiobucal Ligeramente Curvado del Primer Molar Inferior: Una Investigación Radiográfica

    OpenAIRE

    J Prabhakar; Priya, M. S.; L. Jones Tarcius Doss; V. G Sukumaran

    2013-01-01

    The aim of this study was to radiographically investigate the curve existing in slightly curved mesiobuccal canal of mandibular first molar by applying Piecewise straight line approximation. Extracted human mandibular molars were radiographed and one hundred radiographs were selected whose mesiobuccal canal showed slight curvature (10-20°) according to Schneider's method. The curves were traced and analyzed using Piecewise straight line method. Each curve was considered as a unit consisting o...

  19. Cuartos molares supernumerarios: relato de caso clínico

    Directory of Open Access Journals (Sweden)

    Daniela Nascimento Silva

    2006-04-01

    Full Text Available Los dientes supernumerarios se diagnostican mediante exámenes radiográficos de rutina, pues generalmente son asintomáticos. Los cuartos molares representan el segundo grupo de dientes supernumerarios con más frecuencias; ocurren en posición distal a los terceros molares, especialmente en el maxilar superior, y en la mayoría de casos, estos están incluidos. El objetivo de este artículo es realizar la presentación de un caso, de una mujer de 30 anos con los cuartos molares incluidos en el maxilar inferior y describir la técnica para su remoción.Supernumerary teeth are generally asymptomatic and are diagnosed by routine X-ray tests. The fourth molar teeth represent the second group of the most frequent supernumerary teeth, occur in distal position to the third molar teeth, specially in the superior maxilla and, in most of the cases, they are included. The aim of this paper is to comment on the case of a 30-year-old woman with the fourth molar teeth included in the inferior maxilla and to describe the technique used for their removal.

  20. Cuartos molares supernumerarios: relato de caso clínico

    Scientific Electronic Library Online (English)

    Daniela, Nascimento Silva; Marcelo, Ferraro-Bezerra; Karis, Barbosa Guimarães; Claudia Marcela, Hernández Cancino.

    2006-04-01

    Full Text Available Los dientes supernumerarios se diagnostican mediante exámenes radiográficos de rutina, pues generalmente son asintomáticos. Los cuartos molares representan el segundo grupo de dientes supernumerarios con más frecuencias; ocurren en posición distal a los terceros molares, especialmente en el maxilar [...] superior, y en la mayoría de casos, estos están incluidos. El objetivo de este artículo es realizar la presentación de un caso, de una mujer de 30 anos con los cuartos molares incluidos en el maxilar inferior y describir la técnica para su remoción. Abstract in english Supernumerary teeth are generally asymptomatic and are diagnosed by routine X-ray tests. The fourth molar teeth represent the second group of the most frequent supernumerary teeth, occur in distal position to the third molar teeth, specially in the superior maxilla and, in most of the cases, they ar [...] e included. The aim of this paper is to comment on the case of a 30-year-old woman with the fourth molar teeth included in the inferior maxilla and to describe the technique used for their removal.

  1. Inflammatory process decrease by gallium-aluminium-arsenide (GaAlAs) low intensity laser irradiation on postoperative extraction of impacted lower third molar; Reducao de processo inflamatorio com aplicacao de laser de arseneto de galio aluminio ({lambda}=830 nm) em pos-operatorio de exodontia de terceiros molares inferiores inclusos ou semi-inclusos

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    Atihe, Mauricio Martins

    2002-07-01

    This study aimed the observation of inflammatory process decrease by the use of GaAlAs Low Intensity Laser ({lambda}=830 nm; 40 mW) irradiation. Five patients were selected and submitted to surgery of impacted lower third molars, both right and left sides at different occasions. On a first stage, a tooth of a random chosen side - right or left - was extracted by conventional surgery, without LILT. The inflammatory process was measured at postoperative on the first, third and seventh days. This side was then called 'control side'. After 21 days, period in which the inflammatory process of the first surgery was terminated, the other side surgery took place, this time using LILT (4 J at four spots) at postoperative, first and third days. As the previous surgery, the inflammatory process was also measured at postoperative on the first, third and seventh days. This side was called 'experimental or lased side'. The inflammatory process was evaluated by measuring its four characteristic signs: swelling, pain, color and temperature. It was clearly observed a decrease for swelling, pain and color on the lased side which presented significant inference and descriptive statistics. It can be concluded that GaAlAs Low Intensity Laser ({lambda}=830 nm) can surely be used as an additional and important anti-inflammatory source on impacted lower third molar surgeries. (author)

  2. Intraoperative molar pregnancy crisis.

    Science.gov (United States)

    Robinson, B J

    1994-08-01

    Molar pregnancy is a gestation in which the ovum is transformed into a fleshy tumor mass or mole. Of all gynecologic tumors, it is one of the most feared. It is characterized by first trimester bleeding, hyperemesis, and toxemia and can be diagnosed using pelvic ultrasound. Suction currettage is the treatment of choice for molar pregnancy when a patient desires to have more children; however, hysterectomy may be necessary. Abdominal hysterectomy reduces the risk of malignant sequelae. Complications associated with molar pregnancy usually are a result of suction curettage and include pulmonary insufficiency syndrome, choriocarcinoma, hyperthyroidism, theca lutein cysts, and disseminated intravascular coagulation. The perioperative nurse can be instrumental in assessing, planning, organizing, and directing intervention for potential complications associated with the management of a molar pregnancy crisis. The perioperative nurse is encouraged to review all aspects of molar pregnancy to understand the ramifications of the surgical procedures. PMID:7944318

  3. Second molar impaction associated with lip bumper therapy

    Scientific Electronic Library Online (English)

    Helder Baldi, Jacob; Shawn, LeMert; Richard G., Alexander; Peter H., Buschang.

    2014-12-01

    Full Text Available INTRODUÇÃO: embora placas labioativas (PLAs) promovam um ganho clínico significativo no perímetro da arcada inferior em pacientes com dentição mista, ortodontistas são relutantes em usá-las devido a possibilidade de problemas eruptivos dos segundos molares. [...] OBJETIVO: o presente estudo avaliou a impacção dos segundos molares associada ao uso das PLAs e como a impacção pôde ser resolvida. MÉTODOS: radiografias cefalométricas lateral e panorâmica de 67 pacientes (34 do sexo feminino e 33 do masculino) foram avaliadas antes (T1) e após (T2) o tratamento com PLAs, que durou aproximadamente 1,8 ± 0,9 anos. Expansão rápida do palato (ERP) foi usada na maxila no início do uso da PLA. Usando as radiografias panorâmicas, a impacção dos segundos molares inferiores foi avaliada relativamente à posição dos primeiros molares mandibulares. Os movimentos horizontais e verticais dos primeiros e segundos molares inferiores foram avaliados com base em sobreposições de estruturas estáveis da arcada inferior por meio das radiografias laterais. RESULTADOS: oito (11,9%) pacientes apresentaram impacção dos segundos molares mandibulares ao final do tratamento com PLA; dois pacientes tiveram de recorrer à intervenção cirúrgica para a correção da impacção, cinco tiveram a correção da impacção usando apenas espaçadores e um apresentou autocorreção da impacção. A coroa e o ápice do primeiro molar inferior migraram 1.3mm e 2,.3mm, respectivamente, para mesial. O segundo molar não mostrou movimento horizontal significativo. CONCLUSÃO: embora o tratamento com PLA aumente o risco de impacção do segundo molar mandibular, as impacções, na maioria das vezes, podem ser facilmente corrigidas. Abstract in english INTRODUCTION: Although lip bumpers (LBs) provide significant clinical gain of mandibular arch perimeter in mixed-dentition patients, orthodontists are reluctant to use them due to the possibility of permanent second molar eruptive disturbances. [...] OBJECTIVE: The present study was conducted to assess second molar impaction associated with the use of LBs, and to investigate how they can be solved. MATERIAL AND METHODS: Lateral and panoramic radiographs of 67 patients (34 females and 33 males) were assessed prior (T1) and post-LB treatment (T2). LB therapy lasted for approximately 1.8 ± 0.9 years. Concomitant rapid palatal expansion (RPE) was performed in the maxilla at LB treatment onset. Impaction of mandibular second molars was assessed by means of panoramic radiographs in relation to the position of first mandibular molars. Horizontal and vertical movements of first and second molars were assessed cephalometrically on lateral cephalometric radiographs based on mandibular superimpositions. RESULTS: Eight (11.9%) patients had impacted second molars at the end of LB therapy. Two patients required surgical correction, whereas five required spacers and one patient was self-corrected. Mandibular first molar tip and apex migrated forward 1.3 mm and 2.3 mm, respectively. Second molar tip showed no statistically significant horizontal movement. CONCLUSION: Although LB therapy increased the risk of second molar impaction, impactions were, in most instances, easily solved.

  4. Utilización de un bosque deciduo por bovinos a pastoreo / Utilization of a deciduous forest by grazing bovines

    Scientific Electronic Library Online (English)

    Tisbey, Miliani; Freddy, Espinoza; José L, Gil; Alfredo, Baldizán; Yris, Diaz.

    2008-09-01

    Full Text Available Con el objetivo de evaluar la utilización de un bosque deciduo por bovinos a pastoreo al noreste del estado Guárico, Venezuela, en los períodos seco y lluvioso del año 2007, se realizó un ensayo bajo un diseño factorial en bloques al azar. Para ello, se utilizaron vaquillas mestizas doble propósito [...] con una presión de pastoreo de 6 kg MS/100 kg PV. Los tratamientos evaluados fueron tres modalidades de pastoreo: Pastoreo de pasto estrella (Cynodon nlemfuensis), Pastoreo de C. nlemfuensis con acceso restringido al bosque (5 h) y Pastoreo de C. nlemfuensis con libre acceso al bosque. La superficie utilizada para los tratamientos con bosque fue 2 ha. El período de ensayo fue 10 d/época. Se midió la utilización de materia seca de gramíneas, hojarasca, follaje de árboles y frutos caídos. No se encontraron diferencias significativas en la utilización del pasto entre los distintos tratamientos. No obstante, se observaron diferencias altamente significativas (P Abstract in english With the objective to evaluate the utilization of a deciduous forest by grazing bovines at northeast of Guarico state, Venezuela, in dry and rainy seasons in 2007, it was carried out an experiment with a factorial design with randomized blocks. For that, there were used mixed dual purpose heifers wi [...] th a grazing pressure of 6 kg DM/100 kg LW. The evaluated treatments were three grazing conditions: OG: Grazing of star grass (Cynodon nlemfuensis), RAF: Grazing of C. nlemfuensis with restricted access to the forest (5 h) and OAF: Grazing of C. nlemfuensis with open access to the forest. The area used for the treatments with forest was 2 ha. Dry matter utilization of grasses, litter, tree foliage, and fallen fruits were measured. No significant differences were found for grass utilization among treatments. However, significant differences (P

  5. Multiple Abnormal Unerupted Mandibular Permanent Molar Teeth: A Case Report / Molares Mandibulares Anormales No-Erupcionados Múltiples: Reporte de un Caso

    Scientific Electronic Library Online (English)

    Umit, Karacayli; Nuket, Gocmen-Mas.

    2009-03-01

    Full Text Available Los molares permanentes anormales no erupcionados múltiples, además de otras anomalías del desarrollo de los dientes, desde hace tiempo han recibido atención de anatomistas y cirujanos maxilofaciales. Este artículo presenta un caso clínico de un paciente masculino de 23 años de edad, que fue admitid [...] o en el Departamento de Cirugía Maxilofacial de la Facultad de Odontología de la Escuela de Medicina Gulhane, con una historia de seis meses de dolor, en la posición de descanso y durante la masticación, así como dolor en su cuerpo mandibular derecho. Fue encontrada la impactación que resulta de la falla en la erupción y la dislocación de la anatomía normal del desarrollo en tres molares mandibulares. En el examen extraoral fue definida asimetría facial del lado derecho. El diagnóstico de molares mandibulares anormales no erupcionados múltiples fue confirmado por radiografía panorámica e imágenes de tomografía 3D. El diente invertido no erupcionado fue el tercer molar que se encontró en la base de la mandíbula en el lado derecho. En el otro lado, el primer molar se posicionó sobre la base de la mandíbula distoangularmente. El segundo molar se encontró verticalmente en medio del cuerpo mandibular izquierdo. También, el tercer molar erupcionó mesioangularmente. La longitud del arco fue evaluada por el cirujano oral. La distancia mesio-distal entre los dientes fue suficiente. Las causas de impactación de los dientes permanentes podrían haber sido influenciadas por los factores locales, tales como la retención prolongada de dientes deciduos o gérmenes dentales malposicionados, pero no fueron provocados por deficiencia de longitud del arco y dientes supernumerarios. Anomalías tales como las reportadas en el presente caso, son importantes en la cirugía maxilofacial. Abstract in english Abnormal multiply unerupted permanent molars have long received the attention of anatomists and maxillofacial surgeons besides the other developmental teeth anomalies. This paper presents a clinical case of a 23-year-old male patient who was admitted to the department of maxillofacial surgery in fac [...] ulty of dentistry in Gulhane Medical School with a six month history of pain at the rest position and during chewing and also tender on his right corpus of mandible. The impaction which resulted in eruption failure and anatomical dislocation of the normally developed three mandibular molar teeth was found. It was defined facial asymmetry on his right side in extra-oral examination. Diagnosis of multiple abnormal unerupted mandibular molar teeth was confirmed by panoramic and 3D CT images. The unerupted inverted tooth was the third molar which is positioned to basis of the mandible on the right side. In the other side, the first molar was placed on basis of mandible and located distoangulary. The second molar was located on middle of the left corpus mandible vertically. And also, the third molar was erupted mesioangulary. The arch-length was evaluated by the oral surgeon. Mesio-distal distance between the teeth was to be sufficient. Causes of impacted permanent teeth might have been influenced by local factors such as prolonged deciduous tooth retention, malposed tooth germs, but not causing arch-length deficiency and supernumerary teeth. Abnormalities such as those reported in the present case are significant during maxillofacial surgery.

  6. Multiple Abnormal Unerupted Mandibular Permanent Molar Teeth: A Case Report Molares Mandibulares Anormales No-Erupcionados Múltiples: Reporte de un Caso

    Directory of Open Access Journals (Sweden)

    Umit Karacayli

    2009-03-01

    Full Text Available Abnormal multiply unerupted permanent molars have long received the attention of anatomists and maxillofacial surgeons besides the other developmental teeth anomalies. This paper presents a clinical case of a 23-year-old male patient who was admitted to the department of maxillofacial surgery in faculty of dentistry in Gulhane Medical School with a six month history of pain at the rest position and during chewing and also tender on his right corpus of mandible. The impaction which resulted in eruption failure and anatomical dislocation of the normally developed three mandibular molar teeth was found. It was defined facial asymmetry on his right side in extra-oral examination. Diagnosis of multiple abnormal unerupted mandibular molar teeth was confirmed by panoramic and 3D CT images. The unerupted inverted tooth was the third molar which is positioned to basis of the mandible on the right side. In the other side, the first molar was placed on basis of mandible and located distoangulary. The second molar was located on middle of the left corpus mandible vertically. And also, the third molar was erupted mesioangulary. The arch-length was evaluated by the oral surgeon. Mesio-distal distance between the teeth was to be sufficient. Causes of impacted permanent teeth might have been influenced by local factors such as prolonged deciduous tooth retention, malposed tooth germs, but not causing arch-length deficiency and supernumerary teeth. Abnormalities such as those reported in the present case are significant during maxillofacial surgery.Los molares permanentes anormales no erupcionados múltiples, además de otras anomalías del desarrollo de los dientes, desde hace tiempo han recibido atención de anatomistas y cirujanos maxilofaciales. Este artículo presenta un caso clínico de un paciente masculino de 23 años de edad, que fue admitido en el Departamento de Cirugía Maxilofacial de la Facultad de Odontología de la Escuela de Medicina Gulhane, con una historia de seis meses de dolor, en la posición de descanso y durante la masticación, así como dolor en su cuerpo mandibular derecho. Fue encontrada la impactación que resulta de la falla en la erupción y la dislocación de la anatomía normal del desarrollo en tres molares mandibulares. En el examen extraoral fue definida asimetría facial del lado derecho. El diagnóstico de molares mandibulares anormales no erupcionados múltiples fue confirmado por radiografía panorámica e imágenes de tomografía 3D. El diente invertido no erupcionado fue el tercer molar que se encontró en la base de la mandíbula en el lado derecho. En el otro lado, el primer molar se posicionó sobre la base de la mandíbula distoangularmente. El segundo molar se encontró verticalmente en medio del cuerpo mandibular izquierdo. También, el tercer molar erupcionó mesioangularmente. La longitud del arco fue evaluada por el cirujano oral. La distancia mesio-distal entre los dientes fue suficiente. Las causas de impactación de los dientes permanentes podrían haber sido influenciadas por los factores locales, tales como la retención prolongada de dientes deciduos o gérmenes dentales malposicionados, pero no fueron provocados por deficiencia de longitud del arco y dientes supernumerarios. Anomalías tales como las reportadas en el presente caso, son importantes en la cirugía maxilofacial.

  7. Retained Asymptomatic Third Molars and Risk for Second Molar Pathology

    OpenAIRE

    Nunn, M.E.; Fish, M.D.; Garcia, R.I.; Kaye, E.K.; Figueroa, R.; Gohel, A.; Ito, M.; H. J. Lee; Williams, D.E.; Miyamoto, T.

    2013-01-01

    Prophylactic extraction of unerupted asymptomatic third molars is the most common oral surgery procedure in the United States. However, limited evidence exists to justify its costs and associated morbidity. We analyzed data collected over 25 years from 416 adult men enrolled in the Veterans Affairs Dental Longitudinal Study to evaluate the association of retained asymptomatic third molars with risk of adjacent second molar pathology (caries and/or periodontitis), based on third molar status (...

  8. Hipomineralização molar-incisivo

    Directory of Open Access Journals (Sweden)

    Basso, Ana Paula et al.

    2007-01-01

    Full Text Available A hipomineralização-molar incisivo (HMI é um defeito de origem sistêmica no esmalte dentário de primeiros molares e incisivos permanentes. Nesta condição, o esmalte hipomineralizado é frágil e pode se destacar facilmente, deixando a dentina exposta e causando, assim, problemas como sensibilidade dentária e maior risco ao estabelecimento de lesões de cárie. A HMI é freqüentemente confundida com fluorose ou amelogênese imperfeita e sua prevalência varia de 3,6 a 25%. Vários fatores etiológicos são citados para a condição e estão freqüentemente relacionados com doenças na infância nos primeiros três anos de vida. O tratamento envolve desde a restauração dos dentes afetados com materiais adesivos ou até mesmo a extração dos mesmos, dependendo da severidade do caso.

  9. Maxillary sinus pneumatization after maxillary molar extraction assessed with cone beam computed tomography

    International Nuclear Information System (INIS)

    The purpose of this study was to examine the inferior expansion of the maxillary sinus floor following maxillary molar extraction. Cone beam computed tomographic images of 59 subjects were used to evaluate the height difference of the maxillary sinus floor between extraction sites and contralateral dentate sites. The height of the maxillary sinus floor was defined as the vertical distance to the Frankfort plane from the level of the anterior nasal spine to the most inferior point of the sinus floor. We examined the difference in sinus pneumatization according to the number of missing teeth and the vertical relationship of the molar roots to the sinus floor. The inferior expansion of the maxillary sinus floor was 1.20 ± 1.86 mm on the maxillary first molar and 1.90 ± 2.42 mm on the maxillary second molar. Increased expansion was observed in cases where two proximate molars were extracted. There was no significant difference in sinus pneumatization following extraction according to the vertical relationship of the molar roots to the sinus floor. The results of this study confirm that sinus pneumatization occurs following maxillary molar extraction. In situations where pneumatization can affect treatment after molar extraction, three-dimensional radiography should be considered.

  10. Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars

    Scientific Electronic Library Online (English)

    Rubens Rodrigues, Tavares.

    2015-04-01

    Full Text Available O presente caso clínico relata o tratamento de uma má oclusão de Classe II de Angle, em uma jovem com face harmoniosa, porém agravada por agenesias de segundos e terceiros molares inferiores e consequente extrusão dos segundos molares superiores. A anomalia oclusal atípica e peculiar levou a uma pro [...] posta de tratamento individualizada, visando normalizar os maus posicionamentos dentários e uma posterior reabilitação das áreas edêntulas, por meio de uma abordagem multidisciplinar. O presente caso foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO), como parte dos requisitos para a obtenção do título de Diplomado pelo BBO. Abstract in english This clinical case reports the treatment of an Angle Class II malocclusion in a young woman with a balanced face affected by agenesis of second and third mandibular molars and subsequent extrusion of second maxillary molars. The atypical and peculiar occlusal anomaly led to individualized treatment [...] proposed in order to normalize dental malpositions, with subsequent rehabilitation of edentulous areas by means of a multidisciplinary approach. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) in partial fulfillment of the requirements for obtaining the title of certified by the BBO.

  11. Presentación de un paciente geriátrico con retención de tercer molar mandibular / Presentation of a Geriatric Patient with Third Molar Retention

    Scientific Electronic Library Online (English)

    David, Vazquez Isla; Miguel Osvaldo, Rodríguez Garrido; Adis Mirta, Reyna Leyva; Mirleydi, Mesa Pupo; Iveth, Méndez Danta.

    2013-06-01

    Full Text Available Se presentó un paciente masculino de 80 años de edad con retención del tercer molar inferior, que acudió a cuerpo de guardia con cuadro inflamatorio subagudo y dolor de moderada intensidad. El examen radiográfico evidenció la presencia del tercer molar inferior retenido en posición horizontal, el cu [...] al presentaba en su corona área radiolúcida compatible con caries dental. El paciente fue tratado con antibiótico, analgésico y antiinflamatorio y una vez rebasada la fase aguda fue intervenido quirúrgicamente con excelente evolución Abstract in english A 80-year-old male patient with retention of third lower molar that was admitted at Emergency Service with inflammatory sub-acute status and pain of moderated intensity is presented. The radiographic exam evidenced the presence of the third molar retained at horizontal position, which presented in i [...] ts crown, a dark area compatible with dental cavity. The patient was treated with antibiotic, analgesic and anti-inflammatory and when acute phase was over, the third molar was extracted. The surgery was completed without complications with an excellent evolution

  12. Evaluación del distalador molar Belussi Evaluation of Belussi's molar distalizer

    Directory of Open Access Journals (Sweden)

    Samer Abdel Nour Khoury

    2008-12-01

    Full Text Available La distalización de los molares superiores en mesogresión es una alternativa de tratamiento muy utilizado en nuestros días. Se conocen muchos métodos de distalización molar, estos han evolucionado notablemente y siguen siendo eficaces en el tratamiento. El objetivo de esta investigación fue evaluar los cambios dentales producidos por el distalador molar Belussi. El aparato fue empleado en 11 pacientes con una edad promedio de 12 años, distoclusión de molares causada por mesogresión, y con tipo facial favorable. A cada uno se le confeccionaron modelos de estudio y se le realizaron fotografías, radiografías panorámicas y telerradiografías laterales de cráneo, antes y después del tratamiento, para analizar las variables objeto de estudio. El aparato se mantuvo en boca hasta lograr un sobretratamiento de la relación molar. Finalmente, se obtuvo una distalización molar de 4,45 mm acompañada de una inclinación de 5,55°, con una pérdida mínima de anclaje temporal.The distalization of the superior molars in mesial migration is a useful alternative treatment nowadays. Many methods of molar distalization are known. They have significantly evolved and they are still effective in the treatment. The objective of this investigation was to evaluate the dental changes produced by Belussi Molar Distalizer. The appliance was used in 11 patients with an average of 12 years-old, distoocclusion of molars caused by mesial migration and with a favorable facial type. Study models were made for each one of them and pictures, panoramic x-rays and lateral X-rays of the skull were taken, before and after the treatment, to analyze the variables object of study. The appliance was kept in the mouth until achieving an overtreatment of the molar relation. Finally, a molar distalization of 4.45 mm accompanied with an inclination of 5.55° was obtained, with a minimum loss of temporary anchorage.

  13. Evaluación del distalador molar Belussi / Evaluation of Belussi's molar distalizer

    Scientific Electronic Library Online (English)

    Samer Abdel, Nour Khoury; Gloria, Marín Manso; Maiyelín, Llanes Rodríguez; Yulenia, Cruz Rivas.

    2008-12-01

    Full Text Available La distalización de los molares superiores en mesogresión es una alternativa de tratamiento muy utilizado en nuestros días. Se conocen muchos métodos de distalización molar, estos han evolucionado notablemente y siguen siendo eficaces en el tratamiento. El objetivo de esta investigación fue evaluar [...] los cambios dentales producidos por el distalador molar Belussi. El aparato fue empleado en 11 pacientes con una edad promedio de 12 años, distoclusión de molares causada por mesogresión, y con tipo facial favorable. A cada uno se le confeccionaron modelos de estudio y se le realizaron fotografías, radiografías panorámicas y telerradiografías laterales de cráneo, antes y después del tratamiento, para analizar las variables objeto de estudio. El aparato se mantuvo en boca hasta lograr un sobretratamiento de la relación molar. Finalmente, se obtuvo una distalización molar de 4,45 mm acompañada de una inclinación de 5,55°, con una pérdida mínima de anclaje temporal. Abstract in english The distalization of the superior molars in mesial migration is a useful alternative treatment nowadays. Many methods of molar distalization are known. They have significantly evolved and they are still effective in the treatment. The objective of this investigation was to evaluate the dental change [...] s produced by Belussi Molar Distalizer. The appliance was used in 11 patients with an average of 12 years-old, distoocclusion of molars caused by mesial migration and with a favorable facial type. Study models were made for each one of them and pictures, panoramic x-rays and lateral X-rays of the skull were taken, before and after the treatment, to analyze the variables object of study. The appliance was kept in the mouth until achieving an overtreatment of the molar relation. Finally, a molar distalization of 4.45 mm accompanied with an inclination of 5.55° was obtained, with a minimum loss of temporary anchorage.

  14. Embarazo molar repetido: Caso clínico

    Directory of Open Access Journals (Sweden)

    Leonor Zapata

    2002-03-01

    Full Text Available Se presenta el caso clínico de una paciente con tres embarazos molares en tres años. Los dos primeros fueron dos molas completas y el último una mola parcial, todas de la misma pareja sexual. Se revisaron 385 historias de pacientes con cualquier tipo de embarazo molar entre 1991-2000. Hubo 3 pacientes con embarazo molar repetido lo que representa el 0,77 %, se diagnosticaron 104 embarazos y de estos 4 fueron molares lo que representó una mola por cada 26 embarazos. Se hacen comentarios sobre etiología, futuro reproductivo, posible evolución hacia tumor trofoblástico de la gestación y vigilancia clínica de los próximos embarazos.The case of a patient with three molar pregnancies in three years is reported. The first two were complete mola and the last one a partial mola, all from the same sexual partner. The record of 385 patients with any kind of molar pregnancy between 1991-2000 were revised and there were 3 patients with repeated molar pregnancies (0.77 %. There were 104 pregnancies from which 4 were mola (one mola for each 26 pregnancies. We comment about etiology, reproductive future, possible evolution to gestational trophoblastic tumor and clinical surveillance of subsequent pregnancies.

  15. Extrações de molares na Ortodontia / Molar extractions in orthodontics

    Scientific Electronic Library Online (English)

    Marco Antônio, Schroeder; Daniela Kimaid, Schroeder; Diego Júnior Silva, Santos; Michelle Machado, Leser.

    2011-12-01

    Full Text Available O tratamento ortodôntico com extração de molares em pacientes adultos é tecnicamente mais complexo, devido a inúmeros fatores. Em geral, o espaço a ser fechado é maior do que o espaço dos pré-molares e, por isso, a ancoragem é crítica e o tempo de tratamento mais longo. É comum esses casos apresenta [...] rem algum grau de comprometimento periodontal por causa da idade dos pacientes e, portanto, necessitam de maior controle da mecânica ortodôntica para reduzir os efeitos colaterais do fechamento do espaço. Por isso, bons resultados de finalização são mais difíceis de ser alcançados. Sendo assim, este artigo tem como objetivo apresentar as razões para a indicação de extração de molares nos tratamentos ortodônticos, as contraindicações, as diferentes fases da mecânica ortodôntica, esclarecer os fatores envolvidos nesse tipo de planejamento e tratamento e apresentar casos clínicos tratados com extração de molares. Abstract in english Orthodontic treatment with extraction of molars in adult patients is technically more complex due to a number of factors. In general, the space to be closed is greater than premolar spaces rendering critical anchorage and longer treatment time. Often such cases exhibit some degree of periodontal inv [...] olvement due to patient age. Hence, the need for greater control over orthodontic mechanics to reduce the side effects of space closure. Therefore, good finishing results can be more difficult to achieve. Thus, the purpose of this article is to determine the reasons for molar extraction indications, describe different stages of orthodontic mechanics, and explain the issues involved in this kind of planning and treatment. Additionally, it aims at describing some treatments with molar extractions.

  16. Extrações de molares na Ortodontia Molar extractions in orthodontics

    Directory of Open Access Journals (Sweden)

    Marco Antônio Schroeder

    2011-12-01

    Full Text Available O tratamento ortodôntico com extração de molares em pacientes adultos é tecnicamente mais complexo, devido a inúmeros fatores. Em geral, o espaço a ser fechado é maior do que o espaço dos pré-molares e, por isso, a ancoragem é crítica e o tempo de tratamento mais longo. É comum esses casos apresentarem algum grau de comprometimento periodontal por causa da idade dos pacientes e, portanto, necessitam de maior controle da mecânica ortodôntica para reduzir os efeitos colaterais do fechamento do espaço. Por isso, bons resultados de finalização são mais difíceis de ser alcançados. Sendo assim, este artigo tem como objetivo apresentar as razões para a indicação de extração de molares nos tratamentos ortodônticos, as contraindicações, as diferentes fases da mecânica ortodôntica, esclarecer os fatores envolvidos nesse tipo de planejamento e tratamento e apresentar casos clínicos tratados com extração de molares.Orthodontic treatment with extraction of molars in adult patients is technically more complex due to a number of factors. In general, the space to be closed is greater than premolar spaces rendering critical anchorage and longer treatment time. Often such cases exhibit some degree of periodontal involvement due to patient age. Hence, the need for greater control over orthodontic mechanics to reduce the side effects of space closure. Therefore, good finishing results can be more difficult to achieve. Thus, the purpose of this article is to determine the reasons for molar extraction indications, describe different stages of orthodontic mechanics, and explain the issues involved in this kind of planning and treatment. Additionally, it aims at describing some treatments with molar extractions.

  17. Anesthetic technique for inferior alveolar nerve block: a new approach

    Scientific Electronic Library Online (English)

    Dafna Geller, Palti; Cristiane Machado de, Almeida; Antonio de Castro, Rodrigues; Jesus Carlos, Andreo; José Eduardo Oliveira, Lima.

    2011-02-01

    Full Text Available BACKGROUND: Effective pain control in Dentistry may be achieved by local anesthetic techniques. The success of the anesthetic technique in mandibular structures depends on the proximity of the needle tip to the mandibular foramen at the moment of anesthetic injection into the pterygomandibular regio [...] n. Two techniques are available to reach the inferior alveolar nerve where it enters the mandibular canal, namely indirect and direct; these techniques differ in the number of movements required. Data demonstrate that the indirect technique is considered ineffective in 15% of cases and the direct technique in 13-29% of cases. OBJECTIVE: The aim of this study was to describe an alternative technique for inferior alveolar nerve block using several anatomical points for reference, simplifying the procedure and enabling greater success and a more rapid learning curve. MATERIAL AND METHODS: A total of 193 mandibles (146 with permanent dentition and 47 with primary dentition) from dry skulls were used to establish a relationship between the teeth and the mandibular foramen. By using two wires, the first passing through the mesiobuccal groove and middle point of the mesial slope of the distolingual cusp of the primary second molar or permanent first molar (right side), and the second following the oclusal plane (left side), a line can be achieved whose projection coincides with the left mandibular foramen. RESULTS: The obtained data showed correlation in 82.88% of cases using the permanent first molar, and in 93.62% of cases using the primary second molar. CONCLUSION: This method is potentially effective for inferior alveolar nerve block, especially in Pediatric Dentistry.

  18. Inferior Vena Cava Filter Placement and Removal

    Science.gov (United States)

    ... Professions Site Index A-Z Inferior Vena Cava Filter Placement and Removal What is Inferior Vena Cava ... benefits vs. risks? What is Inferior Vena Cava Filter Placement and Removal? In an inferior vena cava ...

  19. Assessment of first molars sagittal and rotational position in Class II, division 1 malocclusion

    Scientific Electronic Library Online (English)

    Paulo Estevão, Scanavini; Renata Pilli, Jóias; Maria Helena Ferreira, Vasconcelos; Marco Antonio, Scanavini; Luiz Renato, Paranhos.

    2013-12-01

    Full Text Available OBJETIVO: esse estudo avaliou o posicionamento anteroposterior dos primeiros molares superiores (1º MS) e inferiores, e o grau de rotação dos 1º MS, em indivíduos com má oclusão de Classe II, divisão 1. MÉTODOS: mensuraram-se, em aparelho de precisão Assimetria I, 60 pares de modelos, de 27 indivídu [...] os do sexo feminino e 33 do masculino, entre 12 e 21 anos de idade, com má oclusão de Classe II, divisão 1. Utilizando a sutura palatina mediana como referência de eixo de simetria, os modelos foram posicionados no aparelho para mensuração da distância entre a crista marginal mesial do molar mais distal e a crista marginal mesial do molar do lado oposto, a fim de verificar o posicionamento sagital dos molares. Em relação à giroversão, mediu-se a distância entre pontos na crista marginal mesial. O teste qui-quadrado a 5% foi utilizado para verificar a variação de posicionamento dos molares, por arcos e por lado. O teste t de Student a 5% foi utilizado para comparar esses valores. RESULTADOS: houve maior número de molares inferiores mesializados e, comparando os lados, maior número de molares mesializados no lado direito em ambas as arcadas. As rotações médias dos molares foram de 0,76mm do lado direito e 0,93mm do esquerdo. CONCLUSÃO: não houve diferença estatisticamente significativa entre os valores médios das mesializações dos molares quanto a lado ou arco. Quando observada isoladamente, a rotação dos molares, quantificada em milímetros, representou uma situação de ¼ de Classe II. Abstract in english OBJECTIVE: This study assessed the anterior-posterior positioning of the upper and lower first molars, and the degree of rotation of the upper first molars in individuals with Class II, division 1, malocclusion. METHODS: Asymmetry I, an accurate device, was used to assess sixty sets of dental casts [...] from 27 females and 33 males, aged between 12 and 21 years old, with bilateral Class II, division 1. The sagittal position of the molars was determined by positioning the casts onto the device, considering the midpalatal suture as a symmetry reference, and then measuring the distance between the mesial marginal ridge of the most distal molar and the mesial marginal ridge of its counterpart. With regard to the degree of rotation of the upper molar, the distance between landmarks on the mesial marginal ridge was measured. Chi-square test with a 5% significance level was used to verify the variation in molars position. Student's t test at 5% significance was used for statistical analysis. RESULTS: A great number of lower molars mesially positioned was registered, and the comparison between the right and left sides also demonstrated a higher number of mesially positioned molars on the right side of both arches. The average rotation of the molars was found to be 0.76 mm and 0.93 mm for the right and left sides, respectively. CONCLUSION: No statistically significant difference was detected between the mean values of molars mesialization regardless of the side and arch. Molars rotation, measured in millimeters, represented ¼ of Class II.

  20. Autotransplantation of a Mandibular Third Molar: A Case Report with 5 Years of Follow-up

    Scientific Electronic Library Online (English)

    Mauro Henrique Chagas e, Silva; Mariane Floriano Lopes Santos, Lacerda; Maria das Gracas Afonso Miranda, Chaves; Celso Neiva, Campos.

    2013-06-01

    Full Text Available O objetivo deste trabalho foi descrever o transplante autógeno de um terceiro molar inferior direito para substituir as raízes residuais do segundo molar no mesmo quadrante, preservando a função e a estética. Foi realizado acompanhamento clínico e radiográfico por 5 anos. Após o transplante, o dente [...] doador recebeu tratamento endodôntico e colocação de hidróxido de cálcio, o qual foi substituído periodicamente a cada 3 meses, até a obturação dos canais radiculares, totalizando período de 1 ano quando então, o fechamento apical foi confirmado. O dente encontra-se em perfeitas condições funcionais e estéticas após 5 anos do início do tratamento. O autotransplante é uma opção viável para a substituição de dentes perdidos quando um dente doador está disponível. O autotransplante de um terceiro molar inferior direito com comprometimento estético e funcional afim de substituir raízes residuais (resultado de um processo cariogênio extenso) de um segundo molar do mesmo quadrante foi um tratamento alternativo viável. Abstract in english This paper describes the autologous transplantation of a mandibular right third molar to replace the residual roots of the second molar in the same quadrant, preserving function and aesthetics. A 5-year clinical and radiographic follow-up was undertaken. After transplantation, the donor tooth receiv [...] ed endodontic treatment and placement of calcium hydroxide, which was periodically replaced every 3 months until the filling of the root canals, totalizing a period of 1-year, when apical closure was confirmed. The tooth was in perfect functional and aesthetic conditions 5 years after beginning of treatment. Autotransplantation is a feasible option for replacing missing teeth when a donor tooth is available. The autotransplantation of a right mandibular third molar with compromised function and aesthetics to replace the residual roots resulting from coronal destruction due to extensive carious lesion of the second molar in the same quadrant was a viable treatment alternative.

  1. Má oclusão Classe I de Angle tratada com extrações de primeiros molares permanentes Angle Class I malocclusion treated with extraction of first permanent molars

    OpenAIRE

    Ivan Tadeu Pinheiro da Silva

    2010-01-01

    A má oclusão Classe I de Angle é caracterizada por uma relação anteroposterior normal nos molares, que pode ou não estar acompanhada por alterações esqueléticas - nos planos vertical ou transverso - ou dentárias. A biprotrusão, revelada pela inclinação acentuada dos incisivos superiores e inferiores para vestibular, somada ao trespasse horizontal excessivo, faz com que o paciente fique mais exposto a traumas dentários, além de causar comprometimento estético. A escolha dos dentes a serem extr...

  2. Inferior alveolar nerve damage because of overextended endodontic material: a problem of sealer cement biocompatibility?

    Science.gov (United States)

    Escoda-Francoli, Jaume; Canalda-Sahli, Carles; Soler, Albert; Figueiredo, Rui; Gay-Escoda, Cosme

    2007-12-01

    Damage to the inferior alveolar nerve is a relatively infrequent complication in dental practice. When root canal treatment of a lower molar or premolar surpasses and/or overextends beyond the apical foramen and invades the periapical zone, the foreign material introduced within such a sensitive anatomical space may mechanically or even chemically affect the inferior alveolar nerve. We describe a case of endodontic treatment of a permanent right lower first molar in which the sealer cement overextended in large amounts and damaged the right inferior alveolar nerve. The condition reverted a few months after the surgical removal of the material. Evaluation of the removed material, using powder x-ray diffraction and scanning electron microscopy with coupled dispersive energy spectroscopy, showed it to consist of calcium tungstate (scheelite [CaWO4]) and zirconium oxide (baddeleyite [ZrO2]), which were chemical components of the sealer cement. PMID:18037065

  3. Autotransplantation of a Mature Mandibular Third Molar to Replace Hopeless Mandibular First Molar Autotransplantation of a Mature Mandibular Third Molar to Replace Hopeless Mandibular First Molar

    OpenAIRE

    Samar Fatemi; Sonbol Fatemi; Maryam Boojarpoor

    2013-01-01

    In this case report, a mature third mandibular molar was transplanted in the socket of a hopeless first mandibular molar of the same quadrant. A 32-year-old woman was diagnosed with strip perforation of her left first lower molar. Orthograde and retrograde treatments were unsuccessful. The tooth was extracted and replaced by the third molar of the same quadrant. Following transplantation, the tooth was splinted and the soft tissue was sutured. Removing sutures and pulp extirpation were carr...

  4. Prevalência de perda precoce de molares decíduos: estudo retrospectivo = Prevalence of early loss of deciduous molars: a retrospective study

    Directory of Open Access Journals (Sweden)

    Alessandro Leite Cavalcanti

    2008-07-01

    Full Text Available Este estudo retrospectivo determinou a prevalência da perda precoce demolares decíduos em pacientes atendidos na clínica de Odontopediatria da Universidade Estadual da Paraíba. Foram examinados 515 prontuários, sendo os dados registrados em um formulário. Foram analisadas as variáveis: gênero, idade, tipo de molar decíduo perdido,arcada dentária (maxilar ou mandibular e lado (direito e esquerdo. Observou-se que a prevalência de perda precoce foi de 15,1%, existindo uma distribuição similar entre os gêneros. Em relação à idade da criança, a maior freqüência de perda acometeu pacientescom sete anos (32,1%. Houve distribuição equitativa da perda dentária entre as arcadas superior e inferior, com 43,6% cada uma, sendo o lado esquerdo o mais acometido (41%. O segundo molar superior esquerdo foi o mais acometido (17,9%, seguido do primeiromolar decíduo superior direito (16,1%. Pode-se concluir que a prevalência de perda precoce foi baixa e que os molares decíduos superiores foram os dentes mais comumente perdidos.This retrospective study determined the prevalence of early loss of deciduous molars in patients enrolled at the Pediatric Dentistry clinic at the State University of Paraíba. A review of 515 patient records were analyzed, registered in a form. The following variables were analyzed: gender, age, type of deciduous molar loss, region (maxilla or mandible and side (right and left. It was observed that the prevalence of early tooth loss was 15.1% and there was a similar distribution between the genders. In regard to age, the greatest frequency of tooth loss involved patients at 7 years old (32.1%. There was a similar distribution of tooth loss between the maxilla and mandible regions, at 43.6% each, with the left side being themost involved (41%. The second upper left deciduous molar was the most commonly missing tooth (17.9%, followed by the first upper right deciduous molar (16.1%. It can be concluded that the prevalence of early loss was lower and that the upper primary molarswere the most commonly missing teeth.

  5. Evaluation of Dental Eruption of Third Molars in the Length of Mandible / Evaluación de la Erupción Dentaria de los Terceros Molares en Relación a la Longitud de la Mandíbula

    Scientific Electronic Library Online (English)

    Gilberto de, Sousa Filho; Adelmar Afonso de, Amorim Júnior; Carla Cabral dos Santos Accioly, Lins; Joaquim Celestino da, Silva Neto.

    2009-12-01

    Full Text Available El objetivo de la presente investigación fue evaluar la erupción del tercer molar a lo largo de la mandíbula usando documentación de ortodoncia obtenida entre los años 2005 y 2006, en un total de 193 casos de individuos brasileños, adultos, de ambos sexos. El análisis cefalométrico y los estudios ra [...] diográficos panorámicos fueron obtenidos de dos clínicas y seleccionados al azar en la ciudad de Recife, Estado de Pernambuco, Brasil. Se analizó el tamaño linear de la mandíbula usando el método cefalómetrico de McNamara, y también la presencia o ausencia de retención dental del tercer molar inferior con la ayuda de radiografías panorámicas, evaluando la relación de esas retenciones, si las hubiere, con la longitud efectiva de la mandíbula. Los resultados muestran que cuando la longitud mandibular efectiva es pequeña induce a retención dental de los terceros molares, siendo en la mayoría de los casos el tercer molar inferior izquierdo, lo cual fue obervado en 46,5 % . Sin embargo, en el 53,8 % de los casos se observó ausencia o no formación de los gérmenes dentales del molar mencionado, característica que se encontró en 60 % en el lado derecho, mostrando un gran tamaño de longitud efectiva de la mandíbula, indicando que la no formación de ese molar no fue directamente relacionada a un reducido espacio en el arco dental. El estudio demostró que el dimorfismo sexual no influencia la erupción de ese molar, sin embargo, la variable edad, resaltó una dependencia relacionada con la erupción dental, retención o ausencia del tercer molar inferior izquierdo. Abstract in english The aim of this work was to evaluate the eruption of the third molar teeth in the length of the mandible using the orthodontic documentation obtained between 2005 and 2006 as sampling method, a total of 193 cases of both sexes. The cephalometric analysis and panoramic radiographic studies were chose [...] n from two clinics randomly selected in the city of Recife ­ Pernambuco - Brazil. It was analyzed the linear size of mandibular bone by the use of McNamara's Cephalometric Analysis, and also the presence or not of dental retention of inferior third molar teeth with the help of panoramic radiographic study, evaluating the commitment of these retentions with the effective length of mandible. The work concluded that when the effective mandibular length is small induces a dental retention of these third molars, mostly the left inferior third molar, which 46.5% of the cases was observed as retained. However, in 53.8% of the cases was observed the absence or no-formation of these dental germs for the left inferior third molar and 60% for the right, showing a big size of the effective length of the mandible exposing that the no-formation of these teeth was not directly related to the lack of space in the dental arch. The study demonstrated that the sexual dimorphism does not influence the eruption of these teeth, however, according to age, was emphasized a dependence concerning about dental eruption, retention or absence of left inferior third molar.

  6. Coronectomy of a lower third molar in combination with vital pulp therapy

    OpenAIRE

    Kim, Young-Bin; Joo, Woo-Hee; Min, Kyung-San

    2014-01-01

    Coronectomy is a procedure that intentionally spares the vital root after removal of the crown of the lower third molar to avoid damage to the inferior alveolar nerve. Vital pulp therapy is one option for managing exposed pulp tissue to reduce the risk of pulpal inflammation or necrosis. Among various dental materials, mineral trioxide aggregate (MTA) has been successfully used for vital pulp therapy. Thus, this case report discusses a coronectomy procedure in combination with vital pulp ther...

  7. La hiperdontia en región de molares Hyperdontia in molar region

    Directory of Open Access Journals (Sweden)

    George Táccio de Miranda Candeiro

    2011-12-01

    Full Text Available La hiperdontia constituye una de las anomalías más estudiadas de la dentición humana. Esa alteración representa la aparición de uno o más dientes en cantidades mayores de lo normal, que puede ocurrir en la mandíbula o maxila y de manera unilateral o bilateral. La etiología de los dientes supernumerarios puede ser explicada principalmente por hiperactividad de la lámina dentaria en la fase inicial. Es importante la detección precoz de dientes supernumerarios porque se ha visto una serie de complicaciones como los diastemas, que pueden causar en la cavidad bucal: retardo de la erupción o dientes impactados, posicionamiento inadecuado de dientes permanentes, desajuste oclusal y el desarrollo de quistes y tumores odontógenos. Así el diagnóstico es normalmente realizado a partir de un examen radiográfico convencional, principalmente la radiografía panorámica. Este trabajo tuvo como objetivo relatar 4 casos clínicos de pacientes con presencia de molares supernumerarios, que fueron atendidos en el Servicio de Radiología de la Escuela de Odontología de la Universidad Federal de Ceará.Hyperdontia is one of the more studied anomalies of human dentition. This alteration represents the appearance of one or more teeth in a number greater of normal, occurring in mandible or in maxilla and could be unilateral or bilateral. The etiology of supernumerary teeth may be explained mainly due to the hyperactivity of dental plate in its initial phase; its early detection is important because of there have been a series of complications that may to cause diastemata, eruption retard or impacted teeth, inappropriate positioning of permanent teeth, occlusal misalignment and the development of odontogenic cysts or tumors. Thus, the diagnosis is normally made from a conventional radiographic examination, mainly the panoramic X-ray. The objective of present paper is the present four clinical cases of patients presenting with supernumerary molars, seen in the Radiology Service during the course of stomatology of the Federal University of Ceará.

  8. La hiperdontia en región de molares / Hyperdontia in molar region

    Scientific Electronic Library Online (English)

    George Táccio, de Miranda Candeiro; Julio Ricardo, Velásquez Lopez; Julissa Janet, Robles Ruiz.

    2011-12-01

    Full Text Available La hiperdontia constituye una de las anomalías más estudiadas de la dentición humana. Esa alteración representa la aparición de uno o más dientes en cantidades mayores de lo normal, que puede ocurrir en la mandíbula o maxila y de manera unilateral o bilateral. La etiología de los dientes supernumera [...] rios puede ser explicada principalmente por hiperactividad de la lámina dentaria en la fase inicial. Es importante la detección precoz de dientes supernumerarios porque se ha visto una serie de complicaciones como los diastemas, que pueden causar en la cavidad bucal: retardo de la erupción o dientes impactados, posicionamiento inadecuado de dientes permanentes, desajuste oclusal y el desarrollo de quistes y tumores odontógenos. Así el diagnóstico es normalmente realizado a partir de un examen radiográfico convencional, principalmente la radiografía panorámica. Este trabajo tuvo como objetivo relatar 4 casos clínicos de pacientes con presencia de molares supernumerarios, que fueron atendidos en el Servicio de Radiología de la Escuela de Odontología de la Universidad Federal de Ceará. Abstract in english Hyperdontia is one of the more studied anomalies of human dentition. This alteration represents the appearance of one or more teeth in a number greater of normal, occurring in mandible or in maxilla and could be unilateral or bilateral. The etiology of supernumerary teeth may be explained mainly due [...] to the hyperactivity of dental plate in its initial phase; its early detection is important because of there have been a series of complications that may to cause diastemata, eruption retard or impacted teeth, inappropriate positioning of permanent teeth, occlusal misalignment and the development of odontogenic cysts or tumors. Thus, the diagnosis is normally made from a conventional radiographic examination, mainly the panoramic X-ray. The objective of present paper is the present four clinical cases of patients presenting with supernumerary molars, seen in the Radiology Service during the course of stomatology of the Federal University of Ceará.

  9. Impacted Mandibular Third Molars: Review of Literature and a Proposal of a Combined Clinical and Radiological Classification.

    Science.gov (United States)

    Santosh, P

    2015-01-01

    Tooth impaction is a pathological situation where a tooth fails to attain its normal functional position. Impacted third molars are commonly encountered in routine dental practice. The impaction rate is higher for third molars when compared with other teeth. The mandibular third molar impaction is said to be due to the inadequate space between the distal of the second mandibular molar and the anterior border of the ascending ramus of the mandible. Impacted teeth may remain asymptomatic or may be associated with various pathologies such as caries, pericoronitis, cysts, tumors, and also root resorption of the adjacent tooth. Even though various classifications exist in the literature, none of those address the combined clinical and radiologic assessment of the impacted third molar. Literature search using the advanced features of various databases such as PubMed, Scopus, Embase, Google Scholar, Directory of Open Access Journals and Cochrane electronic databases was carried out. Keywords like impaction, mandibular third molar, impacted mandibular third molar, complications, anatomy, inferior alveolar nerve injury, lingual nerve injury were used to search the databases. A total of 826 articles were screened, and 50 articles were included in the review which was obtained from 1980 to February 2015. In the present paper, the authors have proposed a classification based on clinical and radiological assessment of the impacted mandibular third molar. PMID:26229709

  10. Ankylosis of primary molar along with congenitally missing first permanent molar

    OpenAIRE

    Suprabha B; Pai S

    2006-01-01

    Ankylosis of primary mandibular molars has been routinely found to be associated with various developmental disturbances in permanent dentition such as aplasia of the succedaneous tooth, ectopic eruption of the premolar, infraoclusion of the ankylosed tooth leading to tipping of the first permanent molar etc. This article describes a rare case where there was ankylosis of a mandibular second primary molar along with congenitally missing first permanent molar which resulted in the transpositio...

  11. Evaluation of Food Retention in Occlusal Surfaces of First Primary Molars / Evaluación de la Retención de Alimentos en las Superficies Oclusales de los Primeros Molares Temporales

    Scientific Electronic Library Online (English)

    L. L, Meneghel; K. B. P, Fernandes; S. M. H, Lara; A, Ferelle; L, Sturion; L. R. F, Walter.

    2010-09-01

    Full Text Available Algunas características de los alimentos, como la viscosidad y consistencia, puede modificar el tiempo para el retiro de alimentos de la boca, así como favorecer la actividad de las bacterias cariogénicas, y el aumento de riesgo de caries dental. Este estudio tuvo como objetivos verificar la retenci [...] ón de alimentos en contacto con un sustrato cariogénico en niños de 24-30 meses de edad. 27 niños (54 dientes) fueron evaluados. Se realizo la ingesta de una galleta de chocolate, y la zona de retención del alimento fue documentada por la fotografía digital en dos tiempos de experimentación (to: 0 y t1: 30 minutos) y se calculó utilizando el software Image Tool 3.0. El índice de superficie (mm2) de retención de alimentos fue estadísticamente reducido (test de Wilcoxon, p = 0,001) después de 30 minutos para molares maxilares (to: 0,37 ± 0,04 y t1: 0,042 ± 0,015) y mandibulares (to:0,30 ± 0,03 y t1: 0,078 ± 0,019). No se observaron diferencias en El índice de superficie de retención de alimentos entre los grupos en el tiempo inicial. En el momento final, los molares inferiores muestran una zona de retención superiores a los maxilares (prueba de Mann-Whitney, p = 0,04). La prevalencia de la retención de alimentos en los molares inferiores fue más alta que los molares superiores (Chi cuadrado, p = 0,03). En conclusión, los primeros molares mandibulares primarios retienen más alimentos que los molares superiores, siendo concordante con los resultados clínicos de la prevalencia de caries. Abstract in english Some food characteristics, like stickiness and consistency, can modify the time for food removal from the mouth as well as favors the activity of cariogenic bacteria, increasing dental caries risk. This study aimed to observe food retention in contact with a cariogenic substrate in 24-30 months old [...] children. Therefore, 27 children (54 teeth) were evaluated. They intake a chocolate cookie and the food retention area was documented by digital photography in two experimental times (to: 0 and t1: 30 minutes) and it was calculated using Image Tool 3.0 software. The food retention surface index (mm2) was statistically reduced (Wilcoxon’s test, p=0.001) after 30 minutes for both maxillary (to: 0.37 ± 0.04 and t1:0.042 ± 0.015) and mandibular (to: 0.30 ± 0.03 and t1: 0.078 ± 0.019) molars. No differences were observed between the groups in food retention surface index at the initial time. At the final time, the mandibular molars show a higher retention area than the maxillary ones (Mann-Whitney’s test, p=0.04). The prevalence of food retention at the mandibular molars is higher than the maxillary molars (Chi Square’s test, p=0.03). In conclusion, first primary mandibular molars retain more food than the maxillary molars, being in agreement with clinical results of dental caries’ prevalence.

  12. Molar ectopic pregnancy in the uterine cornus.

    Science.gov (United States)

    Hwang, Jong Ha; Lee, Jae Kwan; Lee, Nak Woo; Lee, Kyu Wan

    2010-01-01

    Cornual pregnancy is a rare form of ectopic pregnancy. The incidence of hydatiform molar pregnancy is 1 in 1000 to 2000 pregnancies. Molar cornual ectopic pregnancy is extremely rare. A 41-year-old nulliparous woman was admitted via the emergency department because of vaginal bleeding for 2 weeks. Transvaginal sonography exhibited a heterogeneous hypoechoic shadow in the endometrium that suggested a hematometra including blood clots and tissue, and a multicystic echogenic mass, with flow at color Doppler ultrasonography, in the lateral wall of the uterus. A laparoscopic cornuostomy was performed. Pathologic analysis demonstrated placental tissue with features consistent with a partial molar pregnancy. Systemic methotrexate therapy was administered to treat the possible remnants of the molar pregnancy. Molar cornual ectopic pregnancy can be successfully treated with laparoscopic cornuostomy and systemic methotrexate therapy. PMID:20226416

  13. Association between Peritonsillar Abscess and Molar Caries

    Directory of Open Access Journals (Sweden)

    M Shayani Nasab

    2006-05-01

    Full Text Available Background: Peritonsillar abscess is the most common deep neck infections that are related with periodontal disease which has the same pathogenesis. We determined the relationship between peritonsillar infection and molar caries. Methods: In a cross-sectional study, 33 consecutive patients whom referred to Hamadan university clinic of otolaryngologic for peritonsillar abscess were examined by otolaryngologist and dentist who investigated relationship between peritonsillar infection and molar caries. Results: There were 27 males and 6 females with mean age 26.7+_7 years. The frequency caries on ipsilateral peritonsillar infection sides was in relation to molars caries on opposite sides (conterol group. This corrolation was significant with odds ratio 2.5. Conclusion: Molar caries were seen 2.5 times more likely to have peritonsillar infection compared with normal molar sides. Key Words: Peritonsillar abscess, Infection, Periodontal disease, Dental caries

  14. Treating Intraradicular Pockets of molars

    Directory of Open Access Journals (Sweden)

    H. Lotfizade

    1987-10-01

    Full Text Available It appears that until bone graft has not achieved 100% success, intraradicular diseases remain controversial and therefore, different treatment plans are suggested for them. Treating intraradicular diseases depend on many factors: maxillary molars are more prone to bone loss and have worse prognosis. To assess prognosis more carefully these factors should be considered: 1 bone loss: its apical depth, local or generalized 2 bone condition: buccal, lingual, mesial and distal aspects 3 tooth mobility: grades 2 and 3 have not good prognosis. Crown root ratio is also important. 4 the angle of divergence of roots: the more the roots are divergent, the better the prognosis would be. 5adjacent teeth health 6tooth position in jaws 7 age and general health of the patients 8 oral hygiene In general, teeth with 2 roots can be treated more effectively than 3 root ones. Maxillary first premolars are exceptions that do not respond to the treatments positively. We should look forward to the future investigations and findings.

  15. Caries dental aguda del primer molar permanente en niños de 12 años / Acute dental caries of the first permanent molar in children younger than 12 years

    Scientific Electronic Library Online (English)

    Daniel Enrique, Reyes Romagosa; Ireana Josefina, Baños Toirac; María Elena, Sánchez Iturriaga; Blanca Margarita, Rodríguez Martínez.

    2013-09-01

    Full Text Available Introducción: el primer molar permanente es considerado la llave de la oclusión dentaria, la presencia de caries en éste es elevada, lo que dificulta el logro de las metas trazadas por organizaciones de salud a nivel mundial en este grupo de edad. Objetivo: determinar el comportamiento de la caries [...] dental aguda en primer molar permanente en una población de 12 años de edad atendida en la Clínica Estomatológica Santa Cruz de la Parroquia Goaigoaza. Métodos: se realizó un estudio descriptivo transversal en la Clínica Estomatológica Santa Cruz. Parroquia Goaigoaza, municipio Puerto Cabello, estado Carabobo, en el período comprendido entre abril del 2009 a abril 2010. Se seleccionaron 97 pacientes de 12 años de edad los que constituyeron el universo y la muestra. Acudieron a la consulta por dolor debido a la presencia de caries dental aguda. Se registraron las variables: edad, sexo, grado clínico de la caries dental, estímulos externos que provocaron dolor, la cara dental y la arcada dentaria más afectadas. La información fue recogida mediante interrogatorio y examen clínico. Resultados: el sexo masculino representó el 63,9 %. La caries dental de 3er grado estuvo presente en un 68 %. Los estímulos externos que provocaron dolor fueron: el frío presente en 75,2 % y los alimentos dulces en 69,1 % en ambos sexos. El primer molar inferior derecho resultó más afectado (46,4 %) que el izquierdo (36,1 %), así como la arcada dentaria inferior (25,8 %) y la cara oclusal (64,9 %). Conclusiones: predominaron el sexo masculino y la caries dental aguda de 3er grado. El frío y los alimentos dulces fueron los estímulos externos más frecuentes. Los más afectados resultaron el primer molar inferior derecho, la cara oclusal y la arcada dentaria inferior. Abstract in english Introduction: the first permanent molar is considered the dental key to occlusion. The presence of caries here is high, hindering the achievement of goals set by various health organizations worldwide in this age group. Objetive: to determine acute dental caries behavior in the first permanent molar [...] within a 12 year-aged population, assisted at The Dental Clinic of Santa Cruz in Goaigoaza Parish. Method: a descriptive cross-sectional study was conducted in The Dental Clinic of Santa Cruz in Goaigoaza Parish, Puerto Cabello, Carabobo, from April 2009 to April 2010. 97 patients (12 year-aged) were selected to form the universe and sample. These patients came to consultation in pain due to the presence of acute dental caries. Variables were recorded such as: age, sex, clinical grade of dental caries, external stimuli causing pain, dental face and the most affected dental arch: the variables were. The information was collected by interview and clinical examination. Results: the males accounted for 63.9 %. 3rd grade dental caries were present in 68.0 %. External stimuli causing pain were cold (75.2 %) and sweet foods (69.1 %) in both genders. The lower right first molar was the more affected (46.4 %) than the left one (36.1 %), as well as the lower dental arch (25.8 %) and the occlusal face (64.9 %). Conclusions: acute 3rd grade dental caries and males patients predominated. Cold and sweet foods were the most frequent external stimuli, The lower right first molar, the occlusal face and lower dental arch were the most affected.

  16. Maxillary second molar impaction in the adjacent ectopic third molar: Report of five rare cases

    Directory of Open Access Journals (Sweden)

    Bernardo Q Souki

    2015-01-01

    Full Text Available Maxillary second molar impaction in the adjacent ectopic third molar is a rare condition that practitioners might face in the field of pediatric dentistry and orthodontics. The early diagnosis and extraction of the adjacent ectopic third molar have been advocated, and prior research has reported a high rate of spontaneous eruption following third molar removal. However, some challenges in the daily practice are that the early diagnosis of this type of tooth impaction is difficult with conventional radiographic examination, and sometimes the early surgical removal of the maxillary third molar must be postponed because of the risks of damaging the second molar. The objective of this study is to report a case series of five young patients with maxillary second molar impaction and to discuss the difficulty of early diagnosis with the conventional radiographic examination, and unpredictability of self-correction.

  17. Maxillary second molar impaction in the adjacent ectopic third molar: Report of five rare cases

    Science.gov (United States)

    Souki, Bernardo Q.; Cheib, Paula L.; de Brito, Gabriela M.; Pinto, Larissa S. M. C.

    2015-01-01

    Maxillary second molar impaction in the adjacent ectopic third molar is a rare condition that practitioners might face in the field of pediatric dentistry and orthodontics. The early diagnosis and extraction of the adjacent ectopic third molar have been advocated, and prior research has reported a high rate of spontaneous eruption following third molar removal. However, some challenges in the daily practice are that the early diagnosis of this type of tooth impaction is difficult with conventional radiographic examination, and sometimes the early surgical removal of the maxillary third molar must be postponed because of the risks of damaging the second molar. The objective of this study is to report a case series of five young patients with maxillary second molar impaction and to discuss the difficulty of early diagnosis with the conventional radiographic examination, and unpredictability of self-correction. PMID:26321848

  18. Acute inflammation at a mandibular solitary horizontal incompletely impacted molar

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    Minoru Yamaoka

    2009-04-01

    Full Text Available Minoru Yamaoka, Yusuke Ono, Masahide Ishizuka, Yoko Hasumi-Nakayama, Ryosuke Doto, Kouichi Yasuda, Takashi Uematsu, Kiyofumi FurusawaOral and Maxillofacial Surgery, Matsumoto Dental University School of Dentistry, Shiojiri, Nagano, JapanAbstract: Acute inflammation is frequently seen in the elderly around incompletely impacted molars located apart from molars or premolars. To identify the factors causing acute inflammation in the solitary molars without second molars or without second and first molars, ages of patients and rates of acute inflammation in 75 horizontal incompletely impacted mandibular molars in contact or not in contact with molars in subjects 41 years old or older were studied using orthopantomographs. Acute inflammation was seen in nine third molars out of 48 third molars in contact with second molars (18.8%, whereas acute inflammation was seen in 11 molars out of 19 solitary molars without second molars or without first and second molars (57.9% (p < 0.01. The mean age of 48 subjects with third molars in contact with the second molar was 50.42 ± 7.62 years, and the mean age of 19 subjects with isolated molars was 65.16 ± 10.41 years (p < 0.0001. These indicate that a solitary horizontal incompletely impacted molar leads more frequently to acute inflammation along with aging due to possible bone resorption resulting from teeth loss.Keywords: mandible, third molar, impaction, elderly, acute inflammation, solitary molar

  19. Empleo racional de la coronectomía en la extracción de terceros molares incluidos Rational application of coronectomy when treating lower impacted third molar

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    C. Recio Lora

    2009-08-01

    Full Text Available Los terceros molares son los dientes que, con más frecuencia, sufren el fracaso de su erupción y quedan incluidos o retenidos dentro de los maxilares. Un gran porcentaje de nuestros pacientes presentan los cordales incluidos y, de ellos, una parte importante se acompaña de patología que hace aconsejable su tratamiento quirúrgico. La técnica de la coronectomía aplicada al tercer molar incluido fue descrita por primera vez por Ecuyer y Debien en 1984 como la eliminación parcial de dicho diente, dejando deliberadamente parte de su raíz en el interior de la mandíbula. Fue propuesta para evitar la lesión del nervio dentario inferior (NDI en aquéllos casos en los que existía una íntima relación entre ambas estructuras anatómicas. Aunque el objetivo de la técnica es muy claro, no está libre de controversia, ya que el cirujano debe valorar la posibilidad de una complicación infecciosa de origen pulpar. Presentamos un caso clínico exitoso de esta técnica, junto al análisis de la postura ante la técnica de los distintos autores, así como sus ventajas e inconvenientes.Third molars are the teeth that most frequently fail to erupt and remain impacted or retained inside the bone. A large percentage of our patients have impacted wisdom teeth and many of these patients also have pathologies that require surgical treatment. Applied coronectomy technique of the impacted third molar was first described by Ecuyer and Debien in 1984. The described it as partial elimination of the tooth in question, deliberately leaving part of the root inside the bone. This was proposed to avoid injuring the inferior dental nerve in cases where there was a close relationship between the two anatomical structures. Although the objective of the procedure is very clear, it is still controversial. Therefore, the surgeon should evaluate the possibility of an infectious complication of pulpar origin. We present the successful clinical case that uses this technique, as well as an analysis of the distinct authors' opinions this technique and its advantages and disadvantages.

  20. Treatment of ectopic first permanent molar teeth.

    LENUS (Irish Health Repository)

    Hennessy, Joe

    2012-11-01

    Ectopic eruption of the first permanent molar is a relatively common occurence in the developing dentition. A range of treatment options are available to the clinician provided that diagnosis is made early. Non-treatment can result in premature exfoliation of the second primary molar, space loss and impaction of the second premolar. This paper will describe the management of ectopic first permanent molars, using clinical examples to illustrate the available treatment options. CLINICAL RELEVANCE: This paper is relevant to every general dental practitioner who treats patients in mixed dentition.

  1. Pneumatization of bilateral inferior turbinates: case report

    OpenAIRE

    Fatih Akagun; Banu Atalay Erdogan; Fatih Bora

    2013-01-01

    Nasal turbinates are very important for normal nasal functions. Warming, humidification, filtration and regulation of air sow are the main functions of turbinates. Pneumatization of inferior turbinate which is known as inferior concha bullosa is an anatomic variation and less than the pneumatization of middle turbinate. Although usually asymptomatic, severe pneumatized and inferior hypertrophic turbinates can cause nasal obstruction and headache. Mostly; pneumatization of inferior turbinate i...

  2. Caries dental y necesidades de tratamiento en el primer molar permanente en escolares de 12 años de las escuelas públicas del municipio de Rionegro (Antioquia, Colombia, 2010 / Dental Caries and Treatment Needs in the First Permanent Molar [...

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    Anny Marcela Vivares Builes

    2012-07-01

    Full Text Available Antecedentes: es importante evaluar el primer molar permanente, ya que en edad escolar es el diente permanente más afectado por caries. La prevalencia de caries en estos dientes se ha asociado con la actividad futura de caries. Objetivo: determinar la prevalencia de caries y las necesidades de tratamiento de los primeros molares permanentes en la población escolar de 12 años de las escuelas oficiales del municipio de Rionegro (Antioquia. Métodos: se realizó un estudio descriptivo transversal en 808 escolares de 12 años de escuelas públicas del municipio. Se analizó la prevalencia de caries dental en el primer molar permanente por número y tipo de dientes afectados y de acuerdo con sexo, escolaridad, zona de residencia y afiliación al Sistema General de Seguridad Social en Salud (SGSSS. También se describieron las necesidades de tratamiento para cada primer molar permanente. Resultados: los molares inferiores presentaron la mayor prevalencia de caries dental en relación con las variables de afiliación al SGSSS, sexo y zona de residencia; en estas dos últimas variables se evidenció más afectación en el primer molar inferior derecho y concentración en este molar de las necesidades de tratamiento restaurativo. Conclusiones: aunque se cuenta con estudios previos sobre prevalencia de caries dental en el municipio que muestran cumplimiento de metas de la Organización Mundial de la Salud, son más escasos los estudios que evalúen de manera individual los primeros molares permanentes para orientar políticas de salud pública dirigidos a la preservación de estas importantes estructuras dentales. Background: Evaluation of the first permanent molar is important since it is the tooth that is most affected from dental cavities in schoolers. Caries prevalence of this molar has been associated with future caries activity. Objective: Determine caries prevalence and treatment needs in the first permanent molar of a 12-year-old population from public schools in the municipality of Rionegro (Antioquia. Methods: A descriptive study in 808 12-year-old school children from public schools in Rionegro was conducted. Caries prevalence in the first permanent molar was analyzed regarding number and type of teeth affected and association with sex, grade, zone of residence, and type of affiliation to the social security system (SSS. Needs for dental treatment in this molar were also described. Results: Lower molars were the most affected by dental caries in relationship with sex, SSS, and zone of residence; in the latter two dental cavities were more prevalent in the right lower first molar, tooth in which the need for restorative treatment is higher than the other first molars. Conclusions: Although there are previous studies on the dental health status in Rionegro and indicators show that the goals of the World Health Organization are being met, evaluative research focused on the first permanent molar is scarce and necessary given its importance for health public policymaking intended to preserve this teeth.

  3. Inferior mirages: an improved model.

    Science.gov (United States)

    Young, Andrew T

    2015-02-01

    A quantitative model of the inferior mirage is presented, based on a realistic temperature profile in the convective boundary layer, using Monin-Obukhov similarity theory. The top of the inverted image is determined by the logarithmic part of the profile; the bottom is the apparent horizon, which depends on optical obstruction by roughness elements. These effects of surface roughness are included in the model, which is illustrated with a simulation. The vertical magnification varies throughout the mirage, becoming infinite at Minnaert's ill-named "vanishing line"-which makes green flashes apparent to the naked eye. PMID:25967823

  4. Traumatismos de veia cava inferior Inferior vena cava injuries

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    Cleinaldo de Almeida Costa

    2005-10-01

    Full Text Available OBJETIVO: Avaliar a incidência, o perfil clínico e as estratégias operatórias dos ferimentos de Veia Cava Inferior (VCI. MÉTODOS: Foram analisados retrospectivamente os prontuários de 76 doentes com ferimento de VCI atendidos nos dois prontossocorros de Manaus, no período de janeiro de 1997 a julho de 2002. Mecanismo de lesão, mortalidade, estado hemodinâmico, índice de trauma abdominal penetrante (PATI, achados intra-operatórios e conduta cirúrgica foram estudados. RESULTADOS: Quarenta e nove (65% doentes sofreram lesão por arma branca, 26 (34% por arma de fogo e um por traumatismo abdominal fechado. Quarenta e um (54% doentes sobreviveram. Quase todos chegaram acordados, entretanto 40% estavam hipotensos (pressão arterial sistólica BACKGROUND: Injuries of inferior vena cava (IVC require immediate and definitive action. Our objective is to evaluate the incidence, the clinical findings and the operative approach to IVC injuries. METHODS: We retrospectively studied 76 patients with IVC injuries treated in two Emergency Hospitals of Manaus, AM, Brazil, from January 1997 to July 2002. Mechanisms of injuries, mortality, hemodynamic status, penetrating abdominal trauma index (PATI, intraoperative findings and surgical approach were among assessed data. RESULTS: Fourty-nine patients (65% had stab wounds, 26 (34% gunshot wounds, and one had blunt abdominal trauma. Fourty-one (54% patients survived. Almost all patients entered the emergency room awake, although 40% were hypotensive (systolic blood pressure < 70 mmHg, and the penetrating abdominal trauma index average was above 40. At laparotomy, active retroperitoneal bleeding or an expanding retroperitoneal hematoma were detected in all cases. Caval injury was retro-hepatic in 21 patients, and infrahepatic in the other 55. The prevailing surgical approach was lateral repair in 65 patients. Atrial-caval shunting was tried in six patients, with only three survivals. CONCLUSIONS: We concluded that IVC injury remains a highly lethal injury and there is a close relationship with urban violence. This study emphasizes that successful outcome depends on prompt volume restoration, avoidance of hypothermia and a stratified selective surgical approach.

  5. Primer registro de Clastoptera sp. (Hemiptera: Cercopidae) en Harpalyce arborescens (Fabaceae) del bosque tropical deciduo de Tamaulipas, México / First record of Clastoptera sp. (Hemiptera: Cercopidae) in Harpalyce arborescens (Fabaceae) of the tropical deciduous forest in Tamaulipas, Mexico

    Scientific Electronic Library Online (English)

    José Guadalupe, Martínez-Avalos; Manuel, Lara; Griselda, Gaona; Gerardo, Sánchez-Ramos.

    2012-12-01

    Full Text Available Se registra por primera vez la presencia de Clastoptera sp., asociada a Harpalyce arborescens, especie de árbol maderable de alto valor comercial del bosque tropical deciduo del estado de Tamaulipas. Los registros se delimitan a 2 localidades, ubicadas en 3 sitios: San Vicente y González, del munici [...] pio de Casas, en la zona sureste de la Sierra de Tamaulipas (23°25'35.76" N, 98°38'56.86" O; 382 m y 23°21'35.75" N, 98°38'21.06" O; 455 m) y en el ejido Morelos, municipio de Llera, en la parte media de la misma sierra (23°27'27.37" N, 99°05'09.41" O; 546 m). Abstract in english Castopetra sp. is reported for the first time associated to Harpalyce arborescens at a timber tree species of high commercial value of the tropical deciduous forest in Tamaulipas state. The records of the genus are restricted to 2 locations in 3 sites: San Vicente and González, municipality of Casas [...] in the southeast of the Sierra de Tamaulipas (23°25'35.76" N, 98°38'56.86" W; 382 m and 23°21'35.75" N, 98°38'21.06" W; 455 m), and the ejido Morelos municipality of Llera in the middle of the same range (23°27'27.37" N, 99°05'09.41" W; 546 m).

  6. Autotransplantation of a Mature Mandibular Third Molar to Replace Hopeless Mandibular First Molar Autotransplantation of a Mature Mandibular Third Molar to Replace Hopeless Mandibular First Molar

    Directory of Open Access Journals (Sweden)

    Samar Fatemi

    2013-06-01

    Full Text Available In this case report, a mature third mandibular molar was transplanted in the socket of a hopeless first mandibular molar of the same quadrant. A 32-year-old woman was diagnosed with strip perforation of her left first lower molar. Orthograde and retrograde treatments were unsuccessful. The tooth was extracted and replaced by the third molar of the same quadrant. Following transplantation, the tooth was splinted and the soft tissue was sutured. Removing sutures and pulp extirpation were carried out one week later simultaneously while the splint was left for one month. Prior to root canal therapy completion, calcium hydroxide therapy was considered for the tooth. Root canal treatment was completed after 3 months and the tooth was restored. Despite presence of granulation tissue in the socket of the first molar and closed apex of the wisdom tooth, the 9-months follow up revealed that the treatment was successful and no signs and symptoms were detected. In clinical examination, probing depth was normal and the radiograph indicated no pathological changes. The tooth was not tender to percussion and the absence of metal sound was indicative of no replacement resorption.

  7. Má oclusão Classe I de Angle tratada com extrações de primeiros molares permanentes / Angle Class I malocclusion treated with extraction of first permanent molars

    Scientific Electronic Library Online (English)

    Ivan Tadeu Pinheiro da, Silva.

    2010-08-01

    Full Text Available A má oclusão Classe I de Angle é caracterizada por uma relação anteroposterior normal nos molares, que pode ou não estar acompanhada por alterações esqueléticas - nos planos vertical ou transverso - ou dentárias. A biprotrusão, revelada pela inclinação acentuada dos incisivos superiores e inferiores [...] para vestibular, somada ao trespasse horizontal excessivo, faz com que o paciente fique mais exposto a traumas dentários, além de causar comprometimento estético. A escolha dos dentes a serem extraídos para a correção, geralmente, recai sobre os primeiros ou segundos pré-molares, devido à sua posição na arcada. Contudo, a extração do primeiro molar permanente, em função de algum comprometimento, por cárie ou restauração extensa, pode ser uma alternativa, proporcionando a manutenção de um dente hígido em detrimento de outro já manipulado. O presente caso, tratado de maneira incomum, pela extração dos quatro primeiros molares permanentes, foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO), representando a categoria 2, como parte dos requisitos para a obtenção do título de diplomado pelo BBO. Abstract in english Angle Class I malocclusion is characterized by normal anteroposterior molar relationship, which may or may not be accompanied by skeletal changes-in the vertical or transverse planes-or dental changes. Bimaxillary dental protrusion, characterized by pronounced labial inclination of maxillary and man [...] dibular incisors combined with excessive overjet, expose patients to dental trauma and compromise aesthetics. In deciding which teeth to extract for Class I correction the first or second premolars are usually selected due to their location in the dental arch. However, the extraction of a first permanent molar compromised by caries or extensive restoration may be an alternative that ensures the preservation of a healthy tooth instead of one that has already been manipulated. This case, treated in an unusual manner by the extraction of four first permanent molars, was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) as representative of category 2, as part of the requirements for obtaining the BBO diplomate title.

  8. Estudo morfológico da polpa de molares de ratos Wistar frente a uma oclusão traumática experimental Morphological study of the pulp of Wistar rats molars under experimental occlusal interference

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    Luiz Alberto Plácido PENNA

    2000-06-01

    Full Text Available As alterações morfológicas pulpares, decorrentes de um estímulo externo experimental (interferência oclusal, foram estudadas, em nível de microscopia de luz. Utilizaram-se restaurações de amálgama, em sobreoclusão nos primeiros molares superiores direitos de dez ratos Wistar, divididos em 3 grupos e sacrificados por perfusão transcardíaca com formol a 10%, aos 10, 20 e 30 dias. A avaliação foi feita nos molares inferiores direitos (lado experimental e esquerdos (lado controle. As peças ósseas após descalcificação em solução de EDTA associada às microondas, seguiram técnica histológica de rotina e coloração por hematoxilina-eosina e tricrômico de Mallory. Verificou-se no lado controle uma reação intensa caracterizada por um posicionamento atípico dos odontoblastos, seguida pelo aparecimento de cálculos pulpares e posteriormente por uma aparente e uniforme acomodação tecidual em toda a polpa, com moderada incidência de fibras colágenas. No lado experimental, as alterações foram similares parecendo, porém, aumentar com o tempo, principalmente aos 30 dias, onde a imagem histológica era semelhante à do lado controle aos 10 dias. Os resultados obtidos permitiram concluir que a interferência oclusal provocou alterações no tecido conjuntivo pulpar tanto no lado experimental como no controle e que as mesmas foram proporcionais à direção dos movimentos mandibulares.Pulpal morphological alterations in mandibular molars of rats, resulting from an experimental external stimulus (occlusal interference, were studied using light microscopy. We placed amalgam restorations in supraocclusion in the right superior first molars of 10 Wistar rats divided into three groups, which were sacrificed by transcardiac perfusion with 10% formalin, after 10, 20 and 30 days. The evaluation of the right (experimental side and left (control side inferior molars was made after decalcification of the bony specimens with EDTA solution associated with microwaves, followed by routine histologic technique and staining with HE and Mallory?s Trichrome. On the control side, an intense reaction characterized by an atypical positioning of the odontoblasts was observed, followed by the appearance of pulp stones and, subsequently, by an apparent and uniform accommodation of the tissue in the whole pulp, with moderate incidence of collagenous fibers. On the experimental side, the alterations were similar, but they apparently increased with time, specially after 30 days, when the histologic image was similar to that of the control side after 10 days. We can conclude that the occlusal interference induces alterations in the pulpal connective tissue both on the experimental side and on the control side, and they are proportional to the direction of the mandibular movements.

  9. Estudo morfológico da polpa de molares de ratos Wistar frente a uma oclusão traumática experimental / Morphological study of the pulp of Wistar rats molars under experimental occlusal interference

    Scientific Electronic Library Online (English)

    Luiz Alberto Plácido, PENNA; Sigmar de Mello, RODE.

    2000-06-01

    Full Text Available As alterações morfológicas pulpares, decorrentes de um estímulo externo experimental (interferência oclusal), foram estudadas, em nível de microscopia de luz. Utilizaram-se restaurações de amálgama, em sobreoclusão nos primeiros molares superiores direitos de dez ratos Wistar, divididos em 3 grupos [...] e sacrificados por perfusão transcardíaca com formol a 10%, aos 10, 20 e 30 dias. A avaliação foi feita nos molares inferiores direitos (lado experimental) e esquerdos (lado controle). As peças ósseas após descalcificação em solução de EDTA associada às microondas, seguiram técnica histológica de rotina e coloração por hematoxilina-eosina e tricrômico de Mallory. Verificou-se no lado controle uma reação intensa caracterizada por um posicionamento atípico dos odontoblastos, seguida pelo aparecimento de cálculos pulpares e posteriormente por uma aparente e uniforme acomodação tecidual em toda a polpa, com moderada incidência de fibras colágenas. No lado experimental, as alterações foram similares parecendo, porém, aumentar com o tempo, principalmente aos 30 dias, onde a imagem histológica era semelhante à do lado controle aos 10 dias. Os resultados obtidos permitiram concluir que a interferência oclusal provocou alterações no tecido conjuntivo pulpar tanto no lado experimental como no controle e que as mesmas foram proporcionais à direção dos movimentos mandibulares. Abstract in english Pulpal morphological alterations in mandibular molars of rats, resulting from an experimental external stimulus (occlusal interference), were studied using light microscopy. We placed amalgam restorations in supraocclusion in the right superior first molars of 10 Wistar rats divided into three group [...] s, which were sacrificed by transcardiac perfusion with 10% formalin, after 10, 20 and 30 days. The evaluation of the right (experimental side) and left (control side) inferior molars was made after decalcification of the bony specimens with EDTA solution associated with microwaves, followed by routine histologic technique and staining with HE and Mallory?s Trichrome. On the control side, an intense reaction characterized by an atypical positioning of the odontoblasts was observed, followed by the appearance of pulp stones and, subsequently, by an apparent and uniform accommodation of the tissue in the whole pulp, with moderate incidence of collagenous fibers. On the experimental side, the alterations were similar, but they apparently increased with time, specially after 30 days, when the histologic image was similar to that of the control side after 10 days. We can conclude that the occlusal interference induces alterations in the pulpal connective tissue both on the experimental side and on the control side, and they are proportional to the direction of the mandibular movements.

  10. Evaluation of effects of two dexamethasone formulations in impacted third molar surgeries / Avaliação dos efeitos de duas formulações de dexametasona em cirurgias de terceiros molares inclusos

    Scientific Electronic Library Online (English)

    Marsal Moretto, Noboa; Juliana Cama, Ramacciato; Rubens Gonçalves, Teixeira; Carllini Barroso, Vicentini; Francisco Carlos, Groppo; Rogério Heládio Lopes, Motta.

    2014-09-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A utilização da injeção submucosa de dexametasona diretamente na área cirúrgica tem sido realizada em vários procedimentos odontológicos, mas ainda são escassos os estudos que avaliaram a sua eficácia em comparação com a via oral para exodontias de terceiros molares inclu [...] sos. Desta forma, o objetivo do presente estudo foi avaliar a dor, edema e trismo no pós-operatório de cirurgia de terceiros molares inclusos utilizando-se dexametasona, por via oral, ou por injeção local submucosa. MÉTODOS: Estudo prospectivo, controlado, cruzado e randomizado envolvendo 36 pacientes com indicação cirúrgica de terceiros molares inferiores que foram divididos em dois grupos: grupo A injeção local submucosa de dexametasona (4mg/1mL) após a anestesia local e grupo B - 1 comprimido de dexametasona (4mg), por via oral, uma hora antes do procedimento. Edema e trismo foram avaliados clinicamente no pré-operatório, 1º, 2º, 3º e 7º dia de pós-operatório. Os pacientes foram orientados a registrar a intensidade de dor na escala analógica visual nos períodos zero (pré-operatório), 1h, 2h, 4h, 12h, 1 dia, 2 dias, 3 dias e uma semana após as cirurgias. Os dados obtidos foram submetidos a análise estatística com nível de significância de 5%. RESULTADOS: Não revelaram diferenças significativas no tempo cirúrgico em relação aos lados operados (p=0,4). Os valores de edema facial e trismo não demonstraram diferenças estatisticamente significativas entre os grupos observados (p>0,05). Os valores médios de dor registrados na escala analógica visual não mostraram diferença estatística significativa entre os grupos e os pacientes não relataram grande desconforto pós-operatório e não necessitaram prolongar o fármaco analgésico (p>0,05). CONCLUSÃO: As duas vias de administração da dexametasona mostraram-se eficazes no controle da dor, edema e trismo após cirurgias de terceiros molares inferiores, apresentando resultados semelhantes. Abstract in english BACKGROUND AND OBJECTIVES: Submucosal dexamethasone injection directly in the surgical area has been used in different dental procedures, but there are still few studies evaluating its efficacy as compared to oral route for impacted third molar surgeries. So, this study aimed to evaluate postoperat [...] ive pain, edema and trismus after impacted third molar surgeries using oral or submucosal local injection of dexamethasone. METHODS: This was a prospective, controlled, crossover and randomized study involving 36 patients with indication of lower third molar surgeries, who were randomly distributed in two groups: group A - submucosal local injection of dexamethasone (4mg/1mL) after local anesthesia, and group B - oral dexamethasone tablet (4mg) one hour before procedure. Edema and trismus were clinically evaluated in the postoperative period and in the 1st, 2nd, 3rd and 7th postoperative days. Patients were oriented to record pain intensity in the visual analog scale in periods zero (preoperative), 1h, 2h, 4h, 12h, 1 day, 2 days and 3 days and one week after surgery. Data were submitted to statistical analysis with significance level of 5%. RESULTS: There were no significant differences in surgical time with regard to operated sides (p=0.4). Edema and trismus values were not statistically different between observed groups (p>0.05). Mean pain values recorded in the visual analog scale were not statistically different between groups and patients have not reported major postoperative discomfort and had no need to prolong analgesic medication (p>0.05). CONCLUSION: Both dexamethasone administration routes were effective to control pain, edema and trismus after lower third molar surgeries, presenting similar results.

  11. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available BREAST RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 WOMAN 1: ... surgery each of them chose to undergo. The deep inferior epigastric perforator flap technique allows surgeons to ...

  12. Pérdida del primer molar permanente en niños de 6-12 años de edad. Colón. 2013 / First permanent molar lost in children aged 6-12 years. Colon. 2013

    Scientific Electronic Library Online (English)

    Belkis, Reyes Martín; Marisol, Cuyac Lantigua; Belkis, Alfonso Biart; Magaly, Mirabal Peón; María V, Duque Reyes; Yanetsy, Sánchez Alvarado.

    2015-06-01

    Full Text Available El primer molar permanente es una de las estructuras dentarias más importantes para el desarrollo de una oclusión fisiológica y una adecuada función masticatoria, estos dientes desempeñan un papel primordial en el desarrollo y mantenimiento de una oclusión dentaria apropiada, son muy susceptibles a [...] la caries dental, después de su erupción, alrededor de los 6 años. Se realizó un estudio observacional, descriptivo, transversal en la escuela René Fraga Moreno del municipio Colón, provincia de Matanzas con el objetivo de determinar la pérdida del primer molar permanente en los niños de 6 a 12 años, en el periodo comprendido de noviembre del 2012 a enero del 2013. El universo fue 395 estudiantes comprendidos en las edades 6-12 años, la muestra la conformaron 41 niños con,al menos, la pérdida de uno de los cuatro primeros molares. Como resultado, prevalecieron los de 12 años, con los primeros molares ausentes, representando el 31.7 %; el sexo masculino fue el más representado con 65,8 %, el grupo de edad de 12 años presentó un 61.5 % de estudiantes con higiene bucal inadecuada. Se observó que un 87.8 % de los estudiantes estudiados consumían dieta cariogénica, el primer molar que más ausente se encontró en la boca de estos niños fue el primer molar inferior derecho con 60.9 %. Esta afección afectó más al sexo masculino. Predominó la higiene bucal inadecuada. En todas las edades prevaleció la dieta cariogénica. El primer molar inferior derecho fue el que más se ausentó en la boca de estos niños. Abstract in english The first permanent molar is one of the most important dental structures for the development of a physiologic occlusion and an adequate masticatory function; these teeth play an important role in the development and maintenance of an appropriate dental occlusion; they are very predisposed to dental [...] caries after their eruption, around the age of 6 years. A cross-sectional, descriptive, observational study was carried out in the school Rene Fraga Moreno, of Colon municipality, province of Matanzas, with the aim of determining the first permanent molar lost in children aged 6-12 years, in the period from November 2012 to January 2013. The universe were 395 schoolchildren aged 6-12 years; the sample was composed by 41 children, with at least the lost of one of the four first molars. As a result there it was the prevalence of children aged 12 years, with the absence of the first molars, representing 31, 7 %; the male gender was the most represented one with 65, 8 %, and the 12 years age group presented 61, 5 % of students with inadequate buccal hygiene. We observed that 87, 8 % of the studied schoolchildren had a cariogenic diet; the more frequently absent first molar was the first right low molar with 60. 9 %. The male gender was the most affected by this disorder. The inadequate buccal hygiene predominated. The cariogenic diet prevailed in all ages. The first right low molar was the most frequently found lost in the mouth of these children.

  13. Pneumatization of bilateral inferior turbinates: case report

    Directory of Open Access Journals (Sweden)

    Fatih Akagun

    2013-01-01

    Full Text Available Nasal turbinates are very important for normal nasal functions. Warming, humidification, filtration and regulation of air sow are the main functions of turbinates. Pneumatization of inferior turbinate which is known as inferior concha bullosa is an anatomic variation and less than the pneumatization of middle turbinate. Although usually asymptomatic, severe pneumatized and inferior hypertrophic turbinates can cause nasal obstruction and headache. Mostly; pneumatization of inferior turbinate is detected incidentaly on paranasal computerized tomography. Treatment is not always necessary but in some symptomatic cases surgery may be required. There is no consensus about surgical management. Paranasal sinus and turbinate surgical treatment focuses on techniques that affect the functions of the lowest rate. In this report, a 35 year old inferior concha bullosa case who suffers from nasal obstruction is presented and the symptomatology, diagnosis and treatment options are discussed.

  14. Estágio de mineralização dos terceiros molares e sua relação com a idade cronológica: uma amostra da população do Centro-Oeste do Brasil / Third molars stage of mineralization and its relation to chronological age: Midwest Brazil sample

    Scientific Electronic Library Online (English)

    Alyne de Carvalho, GUNDIM; Ana Paula, SOUSA; Jéssica Caroline, SILVA; Renata de, OLIVEIRA; Fernanda Paula, YAMAMOTO-SILVA; Brunno Santos de Freitas, SILVA.

    2014-09-01

    Full Text Available INTRODUÇÃO: Nos últimos anos, alguns estudos foram conduzidos com o objetivo de avaliar a aplicabilidade da análise de desenvolvimento dos terceiros molares na estimativa da idade humana. No entanto, há escassez de trabalhos em amostras populacionais da região Centro-Oeste do Brasil. OBJETIVO: [...] Avaliar a relação entre estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica de indivíduos da região Centro-Oeste do Brasil. MATERIAL E MÉTODO: Trata-se de um estudo observacional transversal, com uma amostra constituída por 120 prontuários de pacientes entre 5 e 22 anos de idade, dos gêneros masculino e feminino, atendidos entre os anos de 2007 e 2012 na nossa instituição. O estágio de desenvolvimento dos terceiros molares inferiores foi avaliado pelo método descrito por Nolla e relacionado à idade cronológica do indivíduo por meio de regressão linear, sendo considerados significantes valores de tendência linear entre 0 e 1. RESULTADO: Pode-se observar que tanto a amostra composta por pacientes do gênero masculino (R2 = 0,7495) quanto do feminino (R2 = 0,8507) apresentaram correlação linear entre o estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica. Notou-se, ainda, que os estágios de desenvolvimento coincidiram com idades semelhantes em ambos os gêneros. CONCLUSÃO: Há relação entre a idade cronológica e o estágio de desenvolvimento dos terceiros molares inferiores na amostra estudada. Estes dados sugerem que este tipo de análise deve ser individualizada, de acordo com as características populacionais da região. Abstract in english INTRODUCTION: In recent years some studies have been taken to evaluate the applicability of the third molar development analysis in the estimation of human age. However, just a few studies with the population from Midwest Brazil were performed. OBJECTIVE: The present study aim to analyze the r [...] elationship between the lower third molars development stage and the chronological age of individuals in Midwest Brazil region. MATERIAL AND METHOD: This cross-sectional observational study comprised a total of 120 panoramic radiographies of patients aged 5-22 year-old, males and females, attended between 2007 and 2012 at our Institution. The third molars development stage was analyzed based on the method described by Nolla and related with the chronological age of the individual by linear regression. It was considered significant values for linear tendency between 0-1. RESULT: It was observed that both, male patients (R2 = 0.7495) and females (R2 = 0.8507), showed a linear correlation between the third molars development stage and chronological age. It was also noted that the development stages coincided with similar ages in both genders. CONCLUSION: There is a relationship between chronological age and developmental stage of the third molars in the sample studied. These data suggest that this type of analysis should be individualized according to the population characteristics.

  15. Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars *

    OpenAIRE

    Tavares, Rubens Rodrigues

    2015-01-01

    This clinical case reports the treatment of an Angle Class II malocclusion in a young woman with a balanced face affected by agenesis of second and third mandibular molars and subsequent extrusion of second maxillary molars. The atypical and peculiar occlusal anomaly led to individualized treatment proposed in order to normalize dental malpositions, with subsequent rehabilitation of edentulous areas by means of a multidisciplinary approach. This case was presented to the Brazil...

  16. Iatrogenic injury to the inferior alveolar nerve : etiology, signs and symptoms, and observations on recovery

    DEFF Research Database (Denmark)

    Hillerup, SØren

    2008-01-01

    The purpose of this prospective, non-randomised, descriptive study is to characterise the neurosensory deficit and associated neurogenic discomfort in 52 patients with iatrogenic injury to the inferior alveolar nerve (IAN). All patients were examined and followed up according to a protocol assessing tactile, thermal, and positional perception as well as two-point discrimination and pain. In 48 patients with IAN injuries of differing etiologies who did not undergo surgery, 32 patients with injury associated with third molar surgery exhibited significant spontaneous improvement of sensory function. Recovery improvement of sensory function was insignificant in the patients with other etiologies. In most patients the level of sensory perception was such that microsurgical repair was only occasionally indicated. Four patients had microsurgical repair; the outcome was favourable in three. IAN injuries associated with third molar surgery, other dento-alveolar surgery or implant surgery occur sufficiently often to render prevention a key issue.

  17. Iatrogenic injury to the inferior alveolar nerve: etiology, signs and symptoms, and observations on recovery

    DEFF Research Database (Denmark)

    Hillerup, S

    2008-01-01

    The purpose of this prospective, non-randomised, descriptive study is to characterise the neurosensory deficit and associated neurogenic discomfort in 52 patients with iatrogenic injury to the inferior alveolar nerve (IAN). All patients were examined and followed up according to a protocol assessing tactile, thermal, and positional perception as well as two-point discrimination and pain. In 48 patients with IAN injuries of differing etiologies who did not undergo surgery, 32 patients with injury associated with third molar surgery exhibited significant spontaneous improvement of sensory function. Recovery improvement of sensory function was insignificant in the patients with other etiologies. In most patients the level of sensory perception was such that microsurgical repair was only occasionally indicated. Four patients had microsurgical repair; the outcome was favourable in three. IAN injuries associated with third molar surgery, other dento-alveolar surgery or implant surgery occur sufficiently often to render prevention a key issue.

  18. Molar Pregnancy Presents as Tubal Ectopic Pregnancy

    OpenAIRE

    Fatemeh Davari Tanha; Elham ShirAli; Haleh Rahmanpour; Fediey Haghollahi

    2011-01-01

    Hydatidiform moles are abnormal gestations characterized by the presence of hydropic changes affecting some or all of the placental villi. Hydatidiform moles arise as a result of the fertilization of an abnormal ovum. In this report, the patient was a 29 year old Asian woman who had induction of ovulation with letrozol. Since the majority of molar gestations arise within the uterine cavity thus the occurrence of a hydatidiform mole within ectopic gestational tissue is rare. It...

  19. Association between Peritonsillar Abscess and Molar Caries

    OpenAIRE

    M. Shayani Nasab; F Behnod; F Farehani; F Hashemian

    2006-01-01

    Background: Peritonsillar abscess is the most common deep neck infections that are related with periodontal disease which has the same pathogenesis. We determined the relationship between peritonsillar infection and molar caries. Methods: In a cross-sectional study, 33 consecutive patients whom referred to Hamadan university clinic of otolaryngologic for peritonsillar abscess were examined by otolaryngologist and dentist who investigated relationship between peritonsillar infection and m...

  20. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 ... hour, live from Beth Israel Medical Center in New York City, you'll hear about the tough ...

  1. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available BREAST RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00: ... Over the next hour, live from Beth Israel Medical Center in New York City, you'll hear ...

  2. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... tough decisions these and other women made after learning they had breast cancer. You will also see the breast reconstruction surgery each of them chose to undergo. The deep inferior epigastric perforator flap technique allows surgeons to ...

  3. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 ... some of this tissue with the muscle in order to maintain these perforating vessels intact to the ...

  4. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00: ... and they have an understanding really gives them control over the decision process. We're certainly not ...

  5. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 WOMAN ... live from Beth Israel Medical Center in New York City, you'll hear about the tough decisions ...

  6. Disposición del conducto dentario inferior en el cuerpo mandibular: Estudio anatómico y tomográfico

    Scientific Electronic Library Online (English)

    Jorge A, Beltrán Silva; Lillie E, Abanto Silva; Abraham, Meneses López.

    2007-09-01

    Full Text Available RESUMEN El objetivo del presente estudio fue determinar la distancia entre el conducto dentario inferior (CDI) y las tablas óseas lingual (TL), vestibular (TV) y basal (RB) en cuatro sectores del cuerpo mandibular. Se utilizaron diez mandíbulas que presentaban la región premolar y molar edéntula. Se [...] evaluaron mediante tomografía espiral convencional (Cranex TOME multifuctional unit, Soredex, Finlandia) y examen visual directo, posterior a la osteotomía. Se realizaron mediciones desde el CDI hasta TL, TV y RB; a nivel del segundo premolar, primer molar, segunda molar y tercer molar. Los resultados obtenidos se evaluaron estadísticamente con las pruebas Kolmogorov-Smirnov, ANOVA y test de Levene; las cuales demostraron homogeneidad y distribución normal entre las medidas de los especímenes y las tomografías (p>0.05). Al analizar las medidas mediante ANOVA y Kruskal-Wallis se encontró que el diámetro del CDI y la distancia hacia la TL eran constantes en los cuatro sectores del cuerpo mandibular (p>0.05). El diámetro del CDI presentó un rango de 2.3mm a 2.6mm y la distancia a TL de 2.5mm a 2.8mm. Las distancias a RB y TV presentaban diferencias estadísticamente significativas (p Abstract in english Abstract The aim of the current study was determine the distance between mandibular canal (CDI) and lingual (TL), labial (V) and basal cortical bone (RB) in four mandibular body areas. Ten mandibular bones showing premolar and molar edentulous region was used. They were assessed by Conventional Spir [...] al Tomography (Cranex TOME multifuctional unit, Soredex, Finland) and a direct visual exam following osteotomy. Measures were made from CDI to TL, TV and RB; at second premolar, first molar, second molar and third molar level. Gotten results were assessed by ANOVA, Kolmogorov-Smirnov and Levene tests that showed homogeneity among specimens measures and Tomographies (p>0.05). ANOVA and Kruskal-Wallis were used to refer measures where CDI diameter and the distance to TL were constant in the four mandibular body areas (p>0.05). CDI diameter showed a rank from 2.3mm to 2.6mm and a distance of 2.5mm a 2.8mm to TL. The distances to RB and TV showed statistically significant differences (p

  7. An incidental finding of the accessory inferior thyroid artery

    OpenAIRE

    Sedy J

    2008-01-01

    We report a case of an incidental finding of the right accessory inferior thyroid artery, emerging from the thyrocervical trunk together with a typical inferior thyroid artery, present in a normal position. On the left side, only single inferior thyroid artery was present. Only one inferior thyroid vein was found on each side. The accessory inferior thyroid artery entered the thyroid gland approximately 1 cm above the normal inferior thyroid, above the superior parathyroid gland. Although acc...

  8. Molar tubal ectopic pregnancy: Report of two cases.

    Science.gov (United States)

    Mbarki, Chaouki; Jerbi, Emna; Hsayaoui, Najeh; Zouari, Fatma; Ben Brahim, Ehsen; Oueslati, Hedhili

    2015-06-01

    Ectopic molar pregnancy is a rare occurrence and consequently not often considered as a diagnostic possibility. We report two cases of molar hydatidiform tubal pregnancy. Diagnosis of ectopic pregnancy was confirmed on clinical biological and sonographic investigations. Diagnosis of molar pregnancy was done on histopathology. The clinical course was favorable for both patients. Although rare, molar changes can occur at any site of an ectopic pregnancy. Clinical diagnosis of a molar pregnancy is difficult but histopathology is the gold standard for diagnosis. PMID:25510265

  9. Pérdida del primer molar permanente en niños de 7 a 13 años / Loss of the first permanent molar tooth in children from 7 to 13 years

    Scientific Electronic Library Online (English)

    Deinys, Pupo Arias; Xiomara Bárbara, Batista Zaldívar; Isidro de Jesús, Nápoles González; Oscar, Rivero Pérez.

    2008-10-01

    Full Text Available Fundamento: La caries dental es una enfermedad crónica, infecciosa, transmisible y multifactorial; prevalece en la infancia y constituye la causa fundamental de la pérdida dental. Objetivo: Determinar la pérdida del primer molar permanente en niños de 7 a 13 años. Método: Se realizó un estudio obser [...] vacional, descriptivo, longitudinal y prospectivo en 63 niños de 7 a 13 años pertenecientes al sector 1 de la urbanización «Las Margaritas», municipio Carirubana, estado Falcón, desde septiembre de 2005 a mayo de 2006. Las variables estudiadas fueron: edad, sexo, daño causado a las estructuras bucales e higiene bucal del niño. Resultados: Del total de pacientes, 16 corresponden al sexo masculino, lo que representó el 57,4 % de la muestra y 12 pacientes al femenino para un 42,6 %. En relación a la edad se obtuvo un mayor número de pacientes en las edades de 10-11 años con un total de seis niños (21,4%). El diente con mayor índice de ausencia fue el primer molar inferior derecho con un total de 16 para el 37,2. De las afecciones bucales más comunes provocadas por la pérdida del primer molar permanente, se encontró que 17 niños presentaron extrusión del antagonista y 13 masticación unilateral. Al analizar la higiene en los niños estudiados se observó que solo en 11 pacientes (39,2%) fue aceptable y en el 60,8 % (17 de los pacientes) fueron evaluados de no aceptable. Conclusiones: El sexo masculino fue el más afectado por la pérdida del primer molar permanente y la higiene bucal en su mayoría fue no aceptable. Abstract in english Background: Dental caries is a transmissible, infectious, chronic and multifactorial disease; prevails in the infancy and constitutes the fundamental cause of the dental loss. Objective: To determine the loss of the first permanent molar tooth in children from 7 to 13 years. Method: An observational [...] , descriptive, longitudinal and prospective study was conducted in 63 children from 7 to 13 years belonging to the sector 1 of the urbanization «Las Margaritas», Carirubana municipality, Falcón state, from September 2005 to May 2006. The studied variables were: age, sex, damage caused to the oral structures and oral hygiene of the boy. Results: Of the total of patients, 16 correspond to the male sex, what represented the 57.4% of the sample and 12 patients to the female one for a 42.6%. Relating to the age a greater number of patients between 10-11 years with a total of six children was obtained (21,4%). The tooth with greater index of absence was the first right lower molar with a total of 16 for the 37.2%. Of the most common oral affections caused by the loss of the first permanent molar tooth, was found that 17 children presented extrusion of the antagonist and 13 unilateral mastication. On analyzing the hygiene in the studied children was observed that just in 11 patients (39,2%) was acceptable and in the 60.8% (17 of the patients) were evaluated as no acceptable. Conclusions: The male sex was the most affected one by the loss of the first permanent molar tooth and mostly oral hygiene was no acceptable.

  10. Radiologic study of mandibular third molar of Korean youths

    International Nuclear Information System (INIS)

    The author has made a study on the classification of the mandibular 3rd molars of Korean youths through dental radiography by means of Pell and Gregory's classification and on the prevalence of the dental caries of distal surface of the mandibular 2nd molar adjacent to the mandibular 3rd molars turned anteriorly. The results are as follow; 1. It was found that the largest case number was class I (272 cases, 52.9%) in the relation of the tooth to the ramus of the mandible and 2nd molar. 2. The mesio-angular position was the largest number (239 cases, 46.5%) in the relation of the long axis of the impacted mandibular 3rd molar to the long axis of the 2nd molar. 3. The mesio-angular position of class I was the largest number (140 cases, 27.2%) in the relation of the tooth to the ramus of the mandible and 2nd molar and the long axis of the impacted mandibular 3rd moral to the long axis of the 2nd molar. 4. The average angle of the long axis of mandibular 3rd molar in mesioangular position or horizontal position to the occlusal plane was 143 W 5. Mandibular 3rd molar with lesion such as dental cries or pericoronitis was 73 cases (14.2). 6. The caries incidence rate of the distal surface of the 2nd molar was about 3.1%.

  11. Restauraciones cerámicas en molares jóvenes con endodoncia Ceramics restorations in young molars with endodontic

    Directory of Open Access Journals (Sweden)

    M. Urdaneta Quintero

    2009-12-01

    Full Text Available Objetivo: Efectuar restauraciones cerámicas Cerec (feldespática y de dióxido de circonio en molares jóvenes con endodoncia, para prevenir complicaciones en el aparato estomatognático por la pérdida de estos dientes. Material y métodos: Se describe la confección de restauraciones cerámicas a nivel de la zona molar mandibular derecha de un paciente del género femenino de 18 años de edad, a quien se le realizó radiografía periapical, por presentar dolor espontáneo en el lado derecho mandibular. Se diagnosticó una pulpitis irreversible en el primer y segundo molar que fue tratada endodónticamente. Las restauraciones cerámicas de ambos molares fueron confeccionadas con los sistemas CAD/CAM Cerec y evaluadas clínicamente a los 6 y 12 meses, de acuerdo a los criterios establecidos por el Servicio de Salud Pública de los Estados Unidos (USPHS. Resultados: La evaluación clínica evidenció que las estructuras de cerámica feldespática y de dióxido de circonio ofrecen en el lapso evaluado, adecuada forma anatómica, adaptación marginal, estabilidad en el color, ausencia de caries recidiva a nivel de dientes del sector posterior con tratamiento endodóntico y aceptación del paciente.Purpose: Make a ceramic restoration (feldsphatic and zirconium dioxide in young molars with endodontic treatment, to prevent further complications in the stomatognathic apparatus for the loss of these teeth. Material and methods: It describes the making of ceramic restorations in the right mandibular molar area to a female patient of 18 years old, to whom it was made a periapical radiography, for presenting spontaneous pain on the mandibular right side. It was diagnosed as an irreversible pulpitis at the first and second molar, that were treated endodontically. The ceramic restorations of both molars were made with the Cerec CAD/CAM system and were examined after 6 and 12 months in accordance with the US Public Health Service (USPHS criteria at baseline. Results: The clinical evaluation showed that the structures of feldspathic ceramic and zirconium dioxide in the offer period evaluated presented, proper anatomical shape, marginal adaptation, color stability, absence of recurrence cavities in the posterior teeth with endodontic treatment and acceptance of the patient.

  12. Restauraciones cerámicas en molares jóvenes con endodoncia / Ceramics restorations in young molars with endodontic

    Scientific Electronic Library Online (English)

    M., Urdaneta Quintero; L., Yánez de Meléndez; J., Álvarez Zárraga; M., Jimeno Jiménez; C., Soto Mestre.

    2009-12-01

    Full Text Available Objetivo: Efectuar restauraciones cerámicas Cerec (feldespática y de dióxido de circonio) en molares jóvenes con endodoncia, para prevenir complicaciones en el aparato estomatognático por la pérdida de estos dientes. Material y métodos: Se describe la confección de restauraciones cerámicas a nivel d [...] e la zona molar mandibular derecha de un paciente del género femenino de 18 años de edad, a quien se le realizó radiografía periapical, por presentar dolor espontáneo en el lado derecho mandibular. Se diagnosticó una pulpitis irreversible en el primer y segundo molar que fue tratada endodónticamente. Las restauraciones cerámicas de ambos molares fueron confeccionadas con los sistemas CAD/CAM Cerec y evaluadas clínicamente a los 6 y 12 meses, de acuerdo a los criterios establecidos por el Servicio de Salud Pública de los Estados Unidos (USPHS). Resultados: La evaluación clínica evidenció que las estructuras de cerámica feldespática y de dióxido de circonio ofrecen en el lapso evaluado, adecuada forma anatómica, adaptación marginal, estabilidad en el color, ausencia de caries recidiva a nivel de dientes del sector posterior con tratamiento endodóntico y aceptación del paciente. Abstract in english Purpose: Make a ceramic restoration (feldsphatic and zirconium dioxide) in young molars with endodontic treatment, to prevent further complications in the stomatognathic apparatus for the loss of these teeth. Material and methods: It describes the making of ceramic restorations in the right mandibul [...] ar molar area to a female patient of 18 years old, to whom it was made a periapical radiography, for presenting spontaneous pain on the mandibular right side. It was diagnosed as an irreversible pulpitis at the first and second molar, that were treated endodontically. The ceramic restorations of both molars were made with the Cerec CAD/CAM system and were examined after 6 and 12 months in accordance with the US Public Health Service (USPHS) criteria at baseline. Results: The clinical evaluation showed that the structures of feldspathic ceramic and zirconium dioxide in the offer period evaluated presented, proper anatomical shape, marginal adaptation, color stability, absence of recurrence cavities in the posterior teeth with endodontic treatment and acceptance of the patient.

  13. Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars.

    Science.gov (United States)

    Tavares, Rubens Rodrigues

    2015-01-01

    This clinical case reports the treatment of an Angle Class II malocclusion in a young woman with a balanced face affected by agenesis of second and third mandibular molars and subsequent extrusion of second maxillary molars. The atypical and peculiar occlusal anomaly led to individualized treatment proposed in order to normalize dental malpositions, with subsequent rehabilitation of edentulous areas by means of a multidisciplinary approach. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) in partial fulfillment of the requirements for obtaining the title of certified by the BBO. PMID:25992995

  14. Angle Class II, subdivision, with agenesis of mandibular second molars and extrusion of maxillary second molars *

    Science.gov (United States)

    Tavares, Rubens Rodrigues

    2015-01-01

    This clinical case reports the treatment of an Angle Class II malocclusion in a young woman with a balanced face affected by agenesis of second and third mandibular molars and subsequent extrusion of second maxillary molars. The atypical and peculiar occlusal anomaly led to individualized treatment proposed in order to normalize dental malpositions, with subsequent rehabilitation of edentulous areas by means of a multidisciplinary approach. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) in partial fulfillment of the requirements for obtaining the title of certified by the BBO. PMID:25992995

  15. Molar Pregnancy Presents as Tubal Ectopic Pregnancy

    Directory of Open Access Journals (Sweden)

    Fatemeh Davari Tanha

    2011-01-01

    Full Text Available Hydatidiform moles are abnormal gestations characterized by the presence of hydropic changesaffecting some or all of the placental villi. Hydatidiform moles arise as a result of the fertilizationof an abnormal ovum. In this report, the patient was a 29 year old Asian woman who had inductionof ovulation with letrozol. Since the majority of molar gestations arise within the uterine cavitythus the occurrence of a hydatidiform mole within ectopic gestational tissue is rare. It is importantto differentiate a hydatidiform mole from a conventional ectopic pregnancy, particularly in infertilewomen who have a history of ovulation induction.

  16. Association between clinical parameters and the presence of active caries lesions in first permanent molars Associação entre parâmetros clínicos e a presença de lesões ativas de cárie em primeiros molares permanentes

    Directory of Open Access Journals (Sweden)

    Juliana Maria Quaglio

    2006-12-01

    Full Text Available The aim of the present study was to evaluate the association between clinical parameters and the presence of active caries lesions on the occlusal surface of first permanent molars. Forty eight children (5.8-13.8 years-old with at least one first permanent molar present were selected. The clinical parameters evaluated were gender, age, DMF-T and dmf-t, presence of active white spots in other teeth, general plaque index, tooth's dental arch (upper or lower, tooth's side (right or left, presence of visible plaque and eruption degree of the first permanent molars. The first permanent molars were evaluated through visual inspection by two examiners in order to assess the presence of active or inactive caries lesions on the occlusal surface. Univariate and multivariate analyses for determination of the association between clinical parameters and the presence of active caries lesions in these teeth were performed. The presence of active white spots in other teeth was associated with the presence of active caries lesions in the first permanent molars, in both univariate and multivariate analyses (Odds ratio = 8.8 and 1.9, respectively. The presence of abundant visible plaque on the occlusal surface of the first permanent molars (Odds ratio = 3.5 in the univariate analysis, and 3.9 in the multivariate one also presented a significant association. In conclusion, the presence of active white spots in other teeth and the presence of considerable visible plaque were associated with the presence of active caries lesions on the occlusal surfaces of first permanent molars.O objetivo do presente trabalho foi avaliar a associação entre parâmetros clínicos e presença de lesões ativas de cárie sobre a superfície oclusal de primeiros molares permanentes. Quarenta e oito crianças (5,8-13,8 anos com pelo menos um primeiro molar permanente foram selecionadas. Os parâmetros clínicos avaliados foram sexo, idade, CPO-D e ceo-d, presença de manchas brancas ativas em outros dentes, índice de placa, arco dentário do dente (superior ou inferior, lado do dente (direito ou esquerdo, presença de placa visível e grau de erupção dos primeiros molares permanentes. Os primeiros molares permanentes foram avaliados usando inspeção visual por dois examinadores para avaliar a presença de lesões de cárie ativas ou inativas sobre a superfície oclusal. Análises univariada e multivariada para avaliação da associação dos parâmetros clínicos e presença de lesões ativas nesses dentes foram realizadas. A presença de manchas brancas ativas em outros dentes apresentou associação significante com a presença de lesões ativas de cárie nos primeiros molares permanentes, em ambas as análises univariada e multivariada ("Odds ratio" = 8,8 e 1,9, respectivamente. A presença de placa visível abundante sobre a superfície oclusal dos primeiros molares permanentes ("Odds ratio" = 3,5 na análise univariada, e 3,9 na análise multivariada também apresentou associação significante. Em conclusão, a presença de manchas brancas ativas em outros dentes e a presença de placa visível abundante apresentaram associação com a presença de lesões ativas de cárie sobre a superfície oclusal dos primeiros molares permanentes.

  17. "Nangañaña" (Tremelloscypha gelatinosa, Sebacinaceae), hongo silvestre comestible del bosque tropical deciduo en la depresión central de Chiapas, México / "Nangañaña" (Tremelloscypha gelatinosa, Sebacinaceae), a wild edible fungus from the tropical deciduous forest of the Central Chiapas Basin, Mexico

    Scientific Electronic Library Online (English)

    Victor, Manuel Bandala; Leticia, Montoya; Rafael, Villegas; Teresa Guadalupe, Cabrera; Manuel de Jesús, Gutiérrez; Tomás, Acero.

    2014-01-01

    Full Text Available Se presenta información sobre el uso de los esporomas de Tremelloscypha gelatinosa como alimento por los habitantes nativos de Nandayalu, una localidad al SE de Tuxtla Gutiérrez, Chiapas, México. El hongo es localmente llamado "nangañaña", los cuerpos fructíferos se recogen durante parte de la tempo [...] rada de lluvias (julio-agosto) y se usan para consumo familiar. Se describe el método de recolección y de preparación, y se presentan fotografías de sus basidiomas, de su hábitat y usos. La especie se registró fructificando en el suelo, bajo árboles de Gymnopodium floribundum, en bosque tropical deciduo en la depresión central de Chiapas. Tremelloscypha gelatinosa es un heterobasidiomiceto del orden Sebacinales y su relación filogenética con especies que forman micorrizas sugiere su posible relación ectomicorrízica con las raíces de las plantas y, por tanto, desempeñando una importante función ecológica en los ecosistemas tropicales donde se desarrolla. Es un hongo poco frecuente, hasta ahora registrado de Jamaica (localidad tipo), Florida (E.U.A.), Yucatán y Quintana Roo (México). No se tenía conocimiento de su uso como elemento comestible silvestre. Abstract in english We present information on the use of sporomes of Tremelloscypha gelatinosa as a food source among native people from Nandayalu, a locality situated SE of Tuxtla Gutiérrez, Chiapas, Mexico. The fungus is locally named "nangañaña" and its fruit bodies are collected during part of the rainy season (Jun [...] e-August) and are used for familiar consumption. Their methods of collecting and preparation are described and photographs of the basidiomes and habit are provided. Tremelloscypha gelatinosa was found growing below trees of Gymnopodium floribundum in the tropical deciduous forest of the Central Chiapas basin. It is a heterobasidiomycete belonging to the order Sebacinales and its phylogenetic placement among proven ectomycorrhizal sebacinoid species suggests its probable ectomycorrhizal symbiosis with plant roots, thus playing a relevant ecological role in tropical ecosytems where it occurs. Tremelloscypha gelatinosa is an infrequently encountered fungus, currently known from Jamaica (type locality), Florida (USA), Yucatán and Quintana Roo (Mexico) and until now unreported as a wild edible fungus.

  18. Mechanics analysis of molar tooth splitting.

    Science.gov (United States)

    Barani, Amir; Chai, Herzl; Lawn, Brian R; Bush, Mark B

    2015-03-01

    A model for the splitting of teeth from wedge loading of molar cusps from a round indenting object is presented. The model is developed in two parts: first, a simple 2D fracture mechanics configuration with the wedged tooth simulated by a compact tension specimen; second, a full 3D numerical analysis using extended finite element modeling (XFEM) with an embedded crack. The result is an explicit equation for splitting load in terms of indenter radius and key tooth dimensions. Fracture experiments on extracted human molars loaded axially with metal spheres are used to quantify the splitting forces and thence to validate the model. The XFEM calculations enable the complex crack propagation, initially in the enamel coat and subsequently in the interior dentin, to be followed incrementally with increasing load. The fracture evolution is shown to be stable prior to failure, so that dentin toughness, not strength, is the controlling material parameter. Critical conditions under which tooth splitting in biological and dental settings are likely to be met, however rare, are considered. PMID:25584989

  19. Morphological changes related to age in mesial root canals of permanent mandibular first molars

    Scientific Electronic Library Online (English)

    Omar A, Gani; Claudio F, Boiero; Carolina, Correa; Ivana, Masin; Ricardo, Machado; Emmanuel JNL, Silva; Luiz Pascoal, Vansan.

    2014-12-01

    Full Text Available O objetivo do presente estudo foi avaliar as alteracoes morfologicas relacionadas com a idade em canais radiculares mesial de primeiros molares inferiores. Cinquenta e seis especimes foram selecionados para este estudo. Os especimes foram distribuidos em quatro grupos etarios (n. 14): a) Grupo de cr [...] iancas menores de 13 anos, b) grupo de adolescentes (de 14 a 19 anos), c) Grupo de jovens adultos (de 20 a 39 anos ) e d) Grupo de adultos (acima de 40 anos). Apos as extracoes os elementos foram cuidadosamente limpos, esterilizados, identificadas e armazenadas em agua. A fim de melhorar a limpeza, foram colocados numa solucao de hipoclorito de sodio a 1%, durante quatro horas e enxaguados em 10 vol. peroxido de hidrogenio durante 8 horas. Depois, uma tecnica de diafanizacao foi realizada para ilustrar a anatomia do canal radicular. As imagens digitalizadas de todas as amostras foram obtidas atraves da utilizacao de um estereoscopio. Os canais foram visivelmente mais simples em adultos mais velhos: eles foram bem definidas e estreito, por vezes, demasiado estreito. Nucleo de calcificacao nao foi encontrado e havia apenas alguns restos de espacos internucleares. O sistema de canal apareceu mais limpa, mais clara e mais bem definida do que nas outras faixas etarias. Pode-se concluir que ha uma correlacao entre as alteracoes do envelhecimento e morfologicas nos canais radiculares mesial de primeiros molares inferiores. Abstract in english The aim of this study was to evaluate age-related morphological canal changes in mesial root canals of mandibular first molars of known ages. Fifty-six specimens were selected for this study and distributed into the following four age groups (n. 14): a) Group of children under 13 years, b) Group of [...] adolescents (from 14 to 19 years), c) Group of young adults (from 20 to 39 years) and d) Group of older adults (over 40 years). The specimens were in perfect condition because after extraction they were carefully cleaned, sterilized, identified and stored in water. In order to improve the cleaning, they were placed in 1% sodium hypochlorite solution for four hours and rinsed in 10 vol. hydrogen peroxide for 8 hours. After that, a clearing technique was performed to illustrate root canal anatomy. Digitalized images of all samples were obtained by use of a stereomicroscope. Canals were noticeably simpler in older adults: they were sharply defined and narrow, sometimes too narrow. Calcification nuclei were not found and there were only a few remains of internuclear spaces. The canal system appeared cleaner, clearer and more sharply defined than in the other age groups. It may be concluded that there is a correlation between aging and morphological changes in the mesial root canals of mandibular first molars.

  20. Remoción de terceros molares mandibulares con asistencia endoscópica: Nota técnica de un nuevo procedimiento quirúrgico para prevenir lesiones del NAI y formación de defectos óseos / Removal of mandibular third molars with endoscopic approach: Technical note of a new surgical procedure to avoid IAN damage and bone defect formation

    Scientific Electronic Library Online (English)

    R, Fuentes; V, Beltrán; M, Cantín; W, Engelke.

    2012-08-01

    Full Text Available La variada posición anatómica de los terceros molares mandibulares presenta importantes desafíos asociados a su profundidad y grado de inclinación. Las complicaciones más habituales del procedimiento quirúrgico convencional de extracción se relacionan con la extensa osteotomía y poca visualización d [...] el sitio quirúrgico, que pueden generar consecuencias post-quirúrgicas como inflamación, dolor, trismus, lesiones reversibles e irreversibles del nervio alveolar inferior (NAI) o nervio lingual, riesgo de fractura y formación de defectos periodontales del segundo molar. La implementación de soportes rígidos en la óptica endoscópica ha permitido utilizar esta tecnología para realizar abordajes mínimamente invasivos para remover terceros molares mediante accesos flapless con una mínima osteotomía de la zona oclusal, conservando la pared bucal y lingual a través de la visualización directa y magnificada del sitio quirúrgico, adaptable a los movimientos del paciente durante la intervención. En este reporte se presenta un nuevo procedimiento quirúrgico mínimamente invasivo a través de asistencia endoscópica para la conservación ósea en la remoción de terceros molares mandibulares con riesgo de lesión del nervio alveolar inferior. Abstract in english Anatomic variability of the position of mandibular third molars represents significant challenges associated with its depth and angulation. The most common complications of conventional surgical procedure are related to extensive osteotomy and poor visualization, which can cause postsurgical effects [...] such as inflammation, pain, trismus, reversible and irreversible lesions of the inferior alveolar nerve (IAN) or lingual nerve, fracture risk and formation of a deep periodontal defect on the distal aspect of the second molar. The implementation of rigid endoscopy in optics has allowed to use this technology via a minimally invasive approach to remove third molars by a minimally occlusal flapless ostectomy, preserving the buccal and lingual walls through direct and magnified visualization of the surgical site, adaptable to the patient’s movements during the surgery. In this report, we present a new and minimally invasive procedure through endoscopic assistance for bone conservation in the removal of third molars at risk of inferior alveolar nerve injury.

  1. Influence of Unerupted Third Molars on Angle and Condyle Fracture

    Directory of Open Access Journals (Sweden)

    Sergio Lins de-Azevedo-Vaz

    2012-01-01

    Full Text Available Condylar and angle fractures are the most common types of mandibular injuries. There is evidence in the literature suggesting that the presence of unerupted lower third molars increases the risk of angle fracture and reduces the chance of condyle fracture. The present paper reports on a case of a 19-year-old Caucasian man who had bilateral angle fracture associated with the two lower unerupted third molars. No other fracture was detected on the panoramic radiograph. This case suggests that unerupted lower third molars increase the risk of angle fracture whereas preventing condyle fracture. Reduction of the bone mass of the angle in the presence of third molars and disruption of the oblique ridge with partially erupted molars support our fi ndings. As the treatment of condyle fracture is more complex, it might not be appropriate to strengthen the mandibular angle, making the mandible more vulnerable to condylar fractures by means of prophylactic extraction of asymptomatic unerupted third molars.

  2. Caracterización de la formación y el desarrollo de los terceros molares / Characterization of the formation and development of the third molars

    Scientific Electronic Library Online (English)

    Liuba, González Espangler; Paula, Mok Barceló; Alexis, de la Tejera Chillón; Yaimel, George Valles; Marvis Lisy, Leyva Lara.

    2014-01-01

    Full Text Available Se realizó un estudio observacional, descriptivo y transversal en el Departamento de Ortodoncia de la Clínica Estomatológica Provincial Docente "Mártires del Moncada" de Santiago de Cuba, con vistas a caracterizar la formación y desarrollo de los terceros molares según edad, localización, sexo y gru [...] po étnico, en el período de mayo de 2010 a igual mes de 2011. La información necesaria se obtuvo de las historias clínicas y radiografías panorámicas de los pacientes ingresados en dicho Departamento. En la casuística, la edad promedio de aparición de la cripta fue a los 8,7 años y de los movimientos eruptivos a los 11-12,2 años; asimismo se concluyó que la arcada inferior, el sexo masculino y la raza negra se adelantaron en alcanzar las diferentes etapas de formación y desarrollo de los cordales. Se recomendó llevar a cabo otra investigación al respecto, pero con un número mayor de pacientes y en edades más tempranas, así como proponer un esquema de formación y desarrollo para el tercer molar en el territorio Abstract in english An observational, descriptive and cross-sectional study was carried out in the Department of Orthodontics of "Martires del Moncada" Provincial School of Dentistry in Santiago de Cuba, with the purpose of characterizing the formation and development of the third molars according to age, location, gen [...] der and ethnicity, in the period of May 2010 to the same month of 2011. The necessary information was obtained from medical records and panoramic x-rays of patients admitted to this department. In the case series the average age of the crypt onset was 8.7 years and the eruptive movements from 11 to 12.2 years; it was also concluded that the lower arch, male sex and black race were advanced to reach the different stages of formation and development of wisdom teeth. It was recommended to carry out another study on this, but with a greater number of patients and at younger ages, and to propose a scheme of the third molar formation and development in the territory

  3. Molar extinction coefficients of some fatty acids

    DEFF Research Database (Denmark)

    Sandhu, G.K.; Singh, K.

    2002-01-01

    The attenuation of gamma rays in some fatty acids, viz. formic acid (CH2O2), acetic acid (C2H4O2), propionic acid (C3H6O2), butyric acid (C4H8O2), n-hexanoic acid (C6H12O2), n-caprylic acid (C8H16O2), lauric acid (C12H24O2), myristic acid (C14H28O2), palmitic acid (C16H32O2), oleic acid (C18H34O2) and stearic acid (C18H36O2), has been measured at the photon energies 81, 356, 511, 662, 1173 and 1332 keV. Experimental values for the molar extinction coefficient, the effective atomic number and the electron density have been derived and compared with theoretical calculations. There is good agreement between experiment and theory.

  4. Molar extinction coefficients of some fatty acids

    International Nuclear Information System (INIS)

    The attenuation of gamma rays in some fatty acids, viz. formic acid (CH2O2), acetic acid (C2H4O2), propionic acid (C3H6O2), butyric acid (C4H8O2), n-hexanoic acid (C6H12O2), n-caprylic acid (C8H16O2), lauric acid (C12H24O2), myristic acid (C14H28O2), palmitic acid (C16H32O2), oleic acid (C18H34O2) and stearic acid (C18H36O2), has been measured at the photon energies 81, 356, 511, 662, 1173 and 1332 keV. Experimental values for the molar extinction coefficient, the effective atomic number and the electron density have been derived and compared with theoretical calculations. There is good agreement between experiment and theory

  5. Molar extinction coefficients of some fatty acids

    DEFF Research Database (Denmark)

    Sandhu, G.K.; Singh, K.; Lark, B.S.; Gerward, Leif

    2002-01-01

    The attenuation of gamma rays in some fatty acids, viz. formic acid (CH2O2), acetic acid (C2H4O2), propionic acid (C3H6O2), butyric acid (C4H8O2), n-hexanoic acid (C6H12O2), n-caprylic acid (C8H16O2), lauric acid (C12H24O2), myristic acid (C14H28O2), palmitic acid (C16H32O2), oleic acid (C18H34O2) and stearic acid (C18H36O2), has been measured at the photon energies 81, 356, 511, 662, 1173 and 1332 keV. Experimental values for the molar extinction coefficient, the effective atomic number and the...

  6. Molar extinction coefficients of some fatty acids

    Science.gov (United States)

    Sandhu, G. K.; Singh, Kulwant; Lark, B. S.; Gerward, L.

    2002-10-01

    The attenuation of gamma rays in some fatty acids, viz. formic acid (CH 2O 2), acetic acid (C 2H 4O 2), propionic acid (C 3H 6O 2), butyric acid (C 4H 8O 2), n-hexanoic acid (C 6H 12O 2), n-caprylic acid (C 8H 16O 2), lauric acid (C 12H 24O 2), myristic acid (C 14H 28O 2), palmitic acid (C 16H 32O 2), oleic acid (C 18H 34O 2) and stearic acid (C 18H 36O 2), has been measured at the photon energies 81, 356, 511, 662, 1173 and 1332 keV. Experimental values for the molar extinction coefficient, the effective atomic number and the electron density have been derived and compared with theoretical calculations. There is good agreement between experiment and theory.

  7. Statistical Interpretation of Femto-Molar Detection

    CERN Document Server

    Go, Jonghyun

    2009-01-01

    Over the last decade, many experiments have demonstrated that nanobiosensors based on Nanotubes and Nanowires are significantly more sensitive compared to their planar counterparts. Yet, there has been persistent gap between reports of analyte detection at ~femto-Molar concentration and theory suggesting the impossibility of sub-pM detection at the corresponding incubation time. This divide has persisted despite the sophistication of the theoretical models. In this paper, we calculate the statistics of diffusion-limited arrival-time distribution by a Monte Carlo method to suggest a statistical resolution of the enduring puzzle: The incubation time in the theory is the mean incubation time, while experiments suggest device stability limited the minimum incubation time. The difference in incubation times - both described by characteristic power-laws - provides an intuitive explanation of different detection limits anticipated by theory and experiments. These power laws broaden the scope of problems amenable to ...

  8. Apparent molar volumes and compressibilities of selected electrolytes in dimethylsulfoxide

    International Nuclear Information System (INIS)

    Densities at T = (293.15, 298.15, 303.15, 313.15, 323.15, and 333.15) K and sound velocities at T = 298.15 K of tetraphenylphosphonium bromide, sodium tetraphenylborate, sodium bromide, and sodium perchlorate in dimethylsulfoxide have been measured over the composition range from (0 to 0.3) mol . kg-1. From these data, apparent molar volumes and apparent molar isentropic compressibilities at infinite dilution as well as the expansibilities have been evaluated. The results have been discussed in terms of employing tetraphenylphosphonium tetraphenylborate as a reference electrolyte in splitting the limiting apparent molar volumes and apparent molar isentropic compressibilities into ionic contributions.

  9. Late Mandibular Angle Fracture After Impacted Third Molar Extraction: Case Report and Review of Predisposing Factors / Fractura Tardía de Ángulo de Mandibula Post Extracción de Tercer Molar Impactado: Reporte de un Caso y Revisión de Factores Predisponentes

    Scientific Electronic Library Online (English)

    Valdir Cabral, Andrade; Patrício José de Oliveira, Neto; Márcio, de Moraes; Luciana, Asprino.

    2013-08-01

    Full Text Available Cirugía del tercer molar es el procedimiento quirúrgico más común en la cavidad oral. Cuando se indica la extracción, una cuidadosa planificación basada en los exámenes clínicos y radiográficos es esencial para evitar complicaciones postoperatorias como sangrado, alveolitis, infecciones, lesiones a [...] los dientes adyacentes, comunicaciones oroantrales o incluso fracturas mandibulares. Aunque es raro, el riesgo de fracturas mandibulares postoperatorias después de la cirugía del tercer molar impactado se relaciona con algunos factores. Reportamos el caso de un paciente de 50 años de edad con queja de dolor en la región del ángulo mandibular izquierdo, quien y declaró que tres semanas antes se había extraído el tercer molar inferior izquierdo. Por tomografía computarizada se confirmó la presencia de una fractura en el ángulo mandibular. Este informe contribuye a mostrar los factores que predisponen para provocar esta lesión después de una revisión de la literatura, que muestran que el clínico los debería tener como consideración cuando indican la extracción de los terceros molares. Para evitar esta complicación, factores como el grado de impactación ósea, profundidad del diente en el hueso, proximidad al canal mandibular, posición en relación a dientes adyacentes, presencia de dilaceraciones radiculares, entre otras, deben ser tomadas en cuenta. Se presenta un caso de fractura mandibular tardía que ocurrió 21 días después de la extracción del tercer molar. Se realizó un tratamiento conservador y después de seis meses de seguimiento radiográfico y clínico, el paciente conservó completamente la función mandibular, con una oclusión normal y sin molestias. Abstract in english Third molar surgery is the most common surgical procedure in the oral cavity. Whenever extraction is indicated, careful planning based on clinical and radiographic examinations is essential to guard against postoperative complications like: bleeding, alveolitis, infections, injury to adjacent teeth, [...] oroantral communications, or even mandibular fractures. Although rare, the risk of postoperative mandibular fractures after third molar impaction surgery is related to some factors. Our case report a 50-year-old white female patient with a complaint of pain in the region of the left mandibular angle and stated that three weeks before she had the left mandibular third molar extracted, which computerized tomographic confirmed the presence of a fracture in the mandibular angle. However, our report contributes to showing the predisposing factors to cause this injury after a review of the literature, showing the clinician what they should take like consideration when they indicate the extraction of third molars. To avoid this complication, factors like bony impaction, depth of tooth within bone, proximity to the inferior dental canal, tooth position in relation to adjacent teeth, the presence of root dilacerations and others must be taken into account. A case of late mandibular fracture that occurred 21 days after third molar extraction is reported. Conservative treatment was adopted and after six-months of radiographic and clinical follow-up, the patient had fully preserved mandibular function, normal occlusion and no discomfort.

  10. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 WOMAN ... hour, live from Beth Israel Medical Center in New York City, you'll hear about the tough decisions ...

  11. Breast Reconstruction: Deep Inferior Epigastric Perforator

    Medline Plus

    Full Text Available ... coming to you live from O.R. 3. I'm Dr. William Samson. I'm a plastic surgeon, and I'll be your moderator for today's program. Today ... inferior epigastric perforator flap, or the DIEP flap. I'm pleased to introduce my colleague, Dr. Mark ...

  12. Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile / Aporte, descomposición de hojarasca y mineralización de nitrógeno en bosques siempreverdes de antiguo crecimiento y bosques secundarios deciduos, centro-sur de Chile

    Scientific Electronic Library Online (English)

    JEROEN, STAELENS; NELE, AMELOOT; LEONARDO, ALMONACID; EVELYN, PADILLA; PASCAL, BOECKX; DRIES, HUYGENS; KRIS, VERHEYEN; CARLOS, OYARZÚN; ROBERTO, GODOY.

    2011-03-01

    Full Text Available Los ecosistemas forestales del sur de Chile presentan un gran valor ecológico pues constituyen una de las mayores áreas del hemisferio Sur con existencias de bosques templados lluviosos. Están sometidos a procesos de deforestación, invasión de especies exóticas, fragmentación e incremento de deposit [...] ación de nitrógeno (N) atmosférico. Para apoyar su manejo sustentable se requiere de mayor conocimiento en el ciclo de nutrientes de estos ecosistemas. Se estudia la dinámica de nutrientes en cuatro sitios de bosques lluviosos valdivianos de la precordillera de los Andes, centro-sur de Chile: un bosque siempreverde de antiguo crecimiento prístino y otro alterado, un bosque caducifolio secundario con manejo silvícola y otro sin. Durante el período octubre 2002 -septiembre 2006, se estimaron (i) masa de la hojarasca (cuatro años) y contenido de nutrientes de la hojarasca (un año), (ii) descomposición y dinámica de nutrientes de hojarasca (un año) y de la corteza de Saxegothaea conspicua, y (iii) mineralización neta de nitrógeno (N-min) en el suelo in situ (un año). El aporte de hojarasca en los cuatro sitios fluctúa desde 3.5 hasta 5.8 ton ha-1 año-1, y es temporalmente menor en bosque caducifolio manejado, respecto del caducifolio sin manejo. Además, presentan una estacionalidad en los siempreverdes que es diferente, respecto de los deciduos. La hojarasca se descompone más rápidamente (promedio 32 % pérdida de masa después de un año) que la corteza (8 %), pero no se presentaron diferencias significativas en la hojarasca. El N neto en la hojarasca de los bosques siempreverdes disminuye durante la descomposición, pero se incrementa en la hojarasca de los deciduos. La N-mineralización neta del suelo fue completa en el bosque siempreverde prístino, intermedia en los bosques deciduos y el más baja en el bosque siempreverde alterado. Dada la ausencia de réplicas en las parcelas, no puede ser demostrado el impacto definido del tipo de bosque o régimen de manejo en el ciclo interno de nutrientes. Sin embargo, los resultados sugieren que el manejo silvícola puede afectar el reciclaje de nutrientes por la alteración en la composición de especies y estructura del bosque, aun cuando en el bosque secundario deciduo una extracción selectiva de madera en tiempo reciente (cinco años), no afecta la descomposición de la hojarasca o los montos de mineralización del nitrógeno. Abstract in english South Chilean forest ecosystems represent one of the largest areas of old-growth temperate rainforests remaining in the Southern hemisphere and have a high ecological value, but suffer from deforestation, invasion by exotic species, fragmentation, and increasing atmospheric nitrogen (N) deposition. [...] To support sustainable forest management, more knowledge is required on nutrient cycling of these ecosystems. Therefore, a descriptive study of nutrient dynamics was done in four Valdivian rainforests in the lower Andes range of south Chile: old-growth and altered evergreen stands and unmanaged and managed secondary deciduous stands. Time series were measured for (i) mass (four year) and nutrient content (N, K, Ca, and Mg; one year) of litterfall, (ii) decomposition and nutrient dynamics (N, C, K, Ca, Mg, and P; one year) of leaf litter and Saxegothaea conspicua bark litter, and (iii) in situ topsoil net N mineralization (one year). Litterfall in the four stands ranged from 3.5 to 5.8 ton ha-1 yr-1, was temporarily lower in the managed than in the unmanaged deciduous stand and had a different seasonality in the evergreen stands than in the deciduous stands. Leaf litter decomposed faster (on average 32 % mass loss after one year) than bark litter (8 %) but without significant differences between leaf litter types. Net N in evergreen leaf litter decreased during decomposition but increased in deciduous leaf litter. Net soil N mineralization was fastest in the pristine evergreen stand, intermediate in the deciduous stands and slowest in the altered evergreen forest. Given the absence of r

  13. Presence of third molars in orthodontic patients from northern Greece

    Directory of Open Access Journals (Sweden)

    Barka G

    2012-05-01

    Full Text Available Georgia Barka,1 Georgios Tretiakov,1 Theodosios Theodosiou,2 Ioulia Ioannidou-Marathiotou31School of Dentistry, 2Biostatistics, Department of Informatics, School of Natural Sciences, 3Department of Orthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, GreeceObjective: The purpose of the present study was to investigate the frequency of presence of third molar teeth and their distribution in each jaw and each side, according to sex, in a group of orthodontic patients with permanent dentition from northern Greece.Methods: The sample included panoramic radiographs from 220 patients with permanent dentition (mean age 13.62 ± 1.81. The ?2 test was used to assess the relationships between the variables, and the Fisher's exact test was used in cases where the expected frequencies in each cell were <5.Results: The frequency of third molar presence was 79.1%, and 20.9% was the frequency of third molar agenesis. Intersexual differences in the number of third molars was not statistically significant. There was a correlation between the distribution of third molars on the right and the left side (Fisher's exact test = 100.788; P = 0. The two sides showed the same tendency toward the presence or absence of third molars. A correlation was also found between the distribution of maxillary and mandibular third molars (Fisher's exact test = 24.372; P = 0. In each jaw, the presence or absence of third molars was highly related to the number of third molars found in the other jaw.Conclusion: The present results showed that in this orthodontic group of northern Greek patients, presence accounted for 79.1% and agenesis for 20.9%. No significant difference was found between the frequencies of third molar presence on the left and right sides in either the maxilla or mandible.Keywords: third molars, presence, orthodontic population, Greeks

  14. Evolución postquirúrgica del cierre de la herida quirúrgica por segunda intención en terceros molares / Postoperative evolution of surgical wound closure by secondary intention in third molars

    Scientific Electronic Library Online (English)

    Felicia Caridad, Morejón Álvarez; Yan, Álvarez Rodríguez.

    2014-12-01

    Full Text Available Introducción: la cirugía del tercer molar constituye uno de los tratamientos que con frecuencia se realiza en la práctica estomatológica. Actualmente es la técnica quirúrgica convencional más empleada. Objetivo: evaluar la evolución postoperatoria en los pacientes con terceros molares inferiores sem [...] iretenidos, con cierre de la herida quirúrgica por segunda intención, según la presencia de dolor, edema, sangramiento, sepsis y trismo mandibular. Material y método: se realizó un estudio analítico, longitudinal, prospectivo de casos y controles en el Hospital General Docente "Abel Santamaría Cuadrado" de Pinar del Río en el período comprendido desde septiembre de 2010 hasta julio de 2013. La muestra estuvo compuesta por 120 pacientes que asistieron a la consulta de cirugía maxilofacial por presentar los terceros molares mandibulares semiretenidos. Para el análisis estadístico se emplearon las técnicas de estadística comparativas de Kolmogorov-Smirnov y la de probabilidad exacta de Fisher. Resultados: en los 60 pacientes operados mediante la técnica quirúrgica convencional con sutura del colgajo vestibular, a las 72 horas presentaban dolor, en 48 era moderado para un 80%, y en 12, era intenso para un 20%. De los 60 que fueron operados mediante la técnica quirúrgica con cierre de la herida por segunda intención, a las 72 horas solo 15 pacientes para un 25% tenían dolor ligero. Conclusiones: hubo una mejor evolución postoperatoria en los pacientes con cierre de la herida quirúrgica por segunda intención, con un 45% de los casos sin dolor y un 90% con edema ligero a las 72 horas de operados; no presentaron síntomas como sangramiento, sepsis, ni trismo mandibular. Abstract in english Introduction: third molar surgery is a treatment often performed during the dentistry practice work. Nowadays it is the most used conventional surgical technique. Objective: to evaluate the postoperative results in patients with non-semi-retained mandibular molars, with closure of the wound by secon [...] dary intention, regarding aspects such as the presence of pain, edema, bleeding, sepsis and mandibular trismus. Methods: an analytical, longitudinal, prospective case-control study was conducted at Abel Santamaria Cuadrado General Teaching Hospital in Pinar del Río, in the period from September 2010 to July 2013. The sample consisted of 120 patients attending the maxillofacial surgery office because of semi-retained mandibular third molars. For statistical analysis we used the Kolmogorov-Smirnov statistic methods and the Fisher exact probability variant. Results: for the 60 patients operated by conventional surgical suture with vestibular flap, after 72 hours pain appeared, and it was moderate in 48-80%, and at 12 hours, it was intense for the 20%. For the 60 patients operated by surgical technique with wound closure by secondary intention, after 72 hours only 15 patients (25%) had mild pain. Conclusions: There was a better postoperative result in patients with surgical wound closure by secondary intention, with 45% of the patients with no pain and 90% with slight edema after 72 hours of surgery; the study showed no symptoms such as bleeding, sepsis, or mandibular trismus.

  15. EMBARAZO ECTÓPICO MOLAR CORNUAL: CASO CLÍNICO

    Scientific Electronic Library Online (English)

    Clara del Carmen, Flores Acosta; Oralia, Barboza Quintana; Oscar, Vidal Gutiérrez; Felipe, Morales Martínez.

    Full Text Available Antecedentes: La incidencia de embarazo ectópico es 20/1000 embarazos y en la región cornual se presentan en el 2-4%. La mola hidatiforme ocurre en 1/1000 embarazos en EEUU y 1/500 en México. La presentación simultánea es muy rara. Se han descrito solamente 40 casos en la literatura médica, con una [...] incidencia estimada de 0,04% de localización cornual. Caso clínico: Primigesta de 30 años, que cursando un embarazo de 8 semanas, acude de urgencia por presentar náuseas y vómitos de 1 día de evolución, con dolor abdominal y sangrado vaginal. Prueba de embarazo positiva. A la exploración física presenta dolor abdominal difuso y signos de irritación peritoneal. El ultrasonido transvaginal mostró imagen ecogénica multiquística intrauterina cercana a la región cornual, por lo que se sospecha embarazo molar. En la laparotomía exploradora se realizó resección cornual y posteriormente dilatación y curetaje de la cavidad uterina. La anatomía patológica confrmó el diagnóstico. Negativizó ß-hGC a las 7 semanas después de la cirugía. Abstract in english Background: The incidence of ectopic pregnancy is 20 per 1,000 pregnancies. The cornual ectopic pregnancy is found in 2-4%. Hydatidiform moles occur in 1 per 1000 pregnancies in USA and 1 per 500 in Mexico. Thus, the incidence of the two occurring together is very rare. Only 40 cases have been repor [...] ted in the medical literature, the incidence estimate is 0.04%. Clinic case: We analyzed a 30 year old woman patient case, gravida 1, with 8 weeks’ gestation by last menstrual period, came at the Hospital Universitario “Dr. José Eleuterio González”, Monterrey, Nuevo León, with complaints of nausea and vomiting for 1 day and abdominal pain, and transvaginal bleeding. A cualitative pregnancy test was positive. Physical examination revealed diffuse abdominal tenderness and peritoneal signs. The transvaginal ultrasonography showed a multicystic echogenic mass within the uterus near cornual region consistent with a molar pregnancy. A cornual resection was performed followed by dilation and curettage. Pathologic diagnosis was confrmed. The monitoring of ß-hGC titers was negative 7 weeks after surgery.

  16. Molar incisor hypomineralisation: clinical management of the young patient.

    LENUS (Irish Health Repository)

    Daly, Dympna

    2009-04-01

    Molar incisor hypomineralisation (MIH) is a common developmental condition resulting in enamel defects in first permanent molars and permanent incisors. It presents at eruption of these teeth. Early diagnosis is essential since rapid breakdown of tooth structure may occur, giving rise to acute symptoms and complicated treatment. The purpose of this article is to review MIH and illustrate its clinical management in young children.

  17. Treatment options for hypomineralized first permanent molars and incisors

    Directory of Open Access Journals (Sweden)

    Ivanovi? Mirjana

    2006-01-01

    Full Text Available The aim of this study was to discuss therapy possibilities in the management of molar incisor hypomineralization. Molar incisor hypomineralization (MIH is defined as hypomineralization of one or more first permanent molars frequently affecting incisors. Etiology of MIH is not fully clarified and numerous etiological factors have been cited. Hypomineralized molars are more prone to caries, cause severe restorative problems and are frequently extracted due to serious damage and caries complications. Incisors can present demarcated enamel opacities, while enamel breakdown is uncommon. Clinically, affected molars can be sensitive to thermal and chemical irritations even when there is no enamel breakdown. Molars can be sensitive to mechanical irritations making even regular tooth brushing painful. Specific problems related to the treatment of these teeth are sensitivity and occlusion in molars and aesthetics in incisors. Considering the fact that permanent first molars with severe defects and incisors demand complex and multidisciplinary treatment they present serious problem for the patient as well as for the dentist.

  18. Taurodont molars: Review of literature and radiological features

    International Nuclear Information System (INIS)

    Taurodontic molar teeth are present as a clinical entity in modem man. This is a suggestion that the occurrence has a racial bias. The importance of the differential diagnosis of teeth with enlarged pulp is discussed, and the possible influence of taurodontic molars on treatment planning is outlined. (author)

  19. Prevalent of root resorption of second molar adjustment the impacted third molar in prepiacal and panoramic radiographs

    Directory of Open Access Journals (Sweden)

    Mohammad Ebrahimi Saravi

    2013-10-01

    Full Text Available   Background and Aims: Impacted third molar reduces the bone level in the distal aspect of second molar, and sometimes it can lead to root resorption of the adjacent tooth. The purpose of this study was to determine this resorption using panoramic and periapical radiographs.   Materials and Methods: In this cross-sectional descriptive study 54 patient (28 men, 26 women above 15 years old with the average of 22 years in Oral and Maxillofacial Department of Tehran University were studied. A periapical radiography from the third molar and a panoramic radiograph were taken from each patient (Because of their routine use and evaluation of accuracy of panoramic compared with periapical, and the magnitude of the root resorption for the second molar was determined by 2 observers and written in a questionnaire. Data were analyzed using Fisher test.   Results: The prevalence of the root resorption of the second molar adjacent to the impacted third molar in the panoramic and the periapical radiographies, with respect to the limitation of the sample size were 46.3% and 31.5%, respectively, with 95% confidence(P>0.05. Most of these resorptions were in the cervical third of the second molar roots and in cases in which the third molars were mesially oriented or horizontal. There was also no significant difference between panoramic and periapical radiographs.   Conclusion: Due to the increased risk of the resorption of the second molar adjacent to the third molar, extraction of the impacted third molars, especiall y mesially oriented or horizontal ones are recommended.

  20. The inferior alveolar artery in the mandibular canal

    International Nuclear Information System (INIS)

    The present study investigated the course of the inferior alveolar artery (IAA) of the mandibular canal (MC), as well as morphological structure of the vascular wall, and the effects of Co-60 gamma irradiation on it. Male Sprague-Dawley strain 7-week-old rats were used as experimental animals. Histopathological changes in the vascular wall were observed by both light and electron microscopy. A single gamma irradiation of 17.82 Gy (TDF 100), 27.97 Gy (TDF 200), or 36.41 Gy (TDF 300) was given to the mandibular area. The IAA/MC ratio on the cross section was 3.4% at the mandibular foramen, 0.1% at the area between the second and third molar teeth, and 0.1% at the mental foramen. The corresponding diameters for these sites were 100 ?m, 30 ?m, and 20 ?m. Morphological examination revealed IAA to be the muscular type of artery. Trichrome staining revealed three layers, including the lamina intima (1.4 ?m), lamina media (13.3 ?m), and lamina adventitia (11.2 ?m). Dilatation of IAA occurred immediately after irradiation, followed by marked contraction on Day 3 after irradiation in the 17.82 Gy group, on Day 5 in the 27.97 Gy group, and on Day 7 in the 36.41 Gy group. During the period between Weeks 2 and 7, however, the 17.82 Gy group showed IAA dilatation. None of radiation injuries, such as rupture, necrosis and stenosis, was seen, but both vacuolation of the lamina intima and media, and irregular arrangement of the fibrous layer were seen. The vasculonervous bundle in MC seemed to be supported with fibrous connective tissues, suggesting an effective buffer effect on the dilatation of the vascular wall and the resistance to traumatic injuries. (N.K.)

  1. Molar extinction coefficients of some fatty acids

    Energy Technology Data Exchange (ETDEWEB)

    Sandhu, G.K.; Singh, Kulwant; Lark, B.S.; Gerward, L. E-mail: gerward@fysik.dtu.dk

    2002-10-01

    The attenuation of gamma rays in some fatty acids, viz. formic acid (CH{sub 2}O{sub 2}), acetic acid (C{sub 2}H{sub 4}O{sub 2}), propionic acid (C{sub 3}H{sub 6}O{sub 2}), butyric acid (C{sub 4}H{sub 8}O{sub 2}), n-hexanoic acid (C{sub 6}H{sub 12}O{sub 2}), n-caprylic acid (C{sub 8}H{sub 16}O{sub 2}), lauric acid (C{sub 12}H{sub 24}O{sub 2}), myristic acid (C{sub 14}H{sub 28}O{sub 2}), palmitic acid (C{sub 16}H{sub 32}O{sub 2}), oleic acid (C{sub 18}H{sub 34}O{sub 2}) and stearic acid (C{sub 18}H{sub 36}O{sub 2}), has been measured at the photon energies 81, 356, 511, 662, 1173 and 1332 keV. Experimental values for the molar extinction coefficient, the effective atomic number and the electron density have been derived and compared with theoretical calculations. There is good agreement between experiment and theory.

  2. La hiperdontia en región de molares

    Directory of Open Access Journals (Sweden)

    George Táccio de Miranda Candeiro

    2011-12-01

    Full Text Available La hiperdontia constituye una de las anomalías más estudiadas de la dentición humana. Esa alteración representa la aparición de uno o más dientes en cantidades mayores de lo normal, que puede ocurrir en la mandíbula o maxila y de manera unilateral o bilateral. La etiología de los dientes supernumerarios puede ser explicada principalmente por hiperactividad de la lámina dentaria en la fase inicial. Es importante la detección precoz de dientes supernumerarios porque se ha visto una serie de complicaciones como los diastemas, que pueden causar en la cavidad bucal: retardo de la erupción o dientes impactados, posicionamiento inadecuado de dientes permanentes, desajuste oclusal y el desarrollo de quistes y tumores odontógenos. Así el diagnóstico es normalmente realizado a partir de un examen radiográfico convencional, principalmente la radiografía panorámica. Este trabajo tuvo como objetivo relatar 4 casos clínicos de pacientes con presencia de molares supernumerarios, que fueron atendidos en el Servicio de Radiología de la Escuela de Odontología de la Universidad Federal de Ceará.

  3. Iatrogenic injury to the inferior alveolar nerve

    DEFF Research Database (Denmark)

    Hillerup, Søren

    2008-01-01

    The purpose of this prospective, non-randomised, descriptive study is to characterise the neurosensory deficit and associated neurogenic discomfort in 52 patients with iatrogenic injury to the inferior alveolar nerve (IAN). All patients were examined and followed up according to a protocol assessing tactile, thermal, and positional perception as well as two-point discrimination and pain. In 48 patients with IAN injuries of differing etiologies who did not undergo surgery, 32 patients with injury...

  4. Valoración de la microfiltración de Compoglass® en molares temporales / Evaluation of Compoglass® microleakage in primary molars

    Scientific Electronic Library Online (English)

    Nuria Esther, Gallardo-López; M. Joaquín, De Nova-García; Mª. Rosa, Mourelle-Martínez.

    2004-02-01

    Full Text Available El propósito de este estudio ha sido evaluar el sellado marginal que proporciona Compoglass® (Vivadent), una resina compuesta modificada con poliácidos, enmolares temporales. Se realizaron 12 cavidades de clase II en la superficie distal de 12 molares temporales exodonciados sanos, obturándolas con [...] Compoglass. Tras someterlas a un proceso de envejecimiento, se sellaron los dientes excepto en la zona de las restauraciones y se sumergieron en azul de metileno al 5% durante 4 horas. Después, se seccionaron longitudinalmente y se fotografiaron a 40 aumentos. La microfiltración se limitó al esmalte dentario en todas las muestras. Sólo se observófiltración en los márgenes gingivales y únicamente en el 36,36% de las muestras. Compoglass proporciona un sellado marginal aceptable para su uso clínico en la dentición temporal. Abstract in english The purpose of this study has been to evaluate the marginal seal of Compoglass® (Vivadent), a polyacid-modified composite resin, in primary molars. Twelve clase II-cavities were prepared on the distal surfaces of 12 extracted healthy primary molars, restoring them with Compoglass. After a thermocycl [...] ing process, the teeth were sealed except in the area of the restorations and were immersed in methylene blue 5% for 4 hours. Next, they were longitudinally sectioned and photographs were taken at a 40x magnification. The microleakage was limited to dental enamel in all the samples. Microleakage was onlyobserved in the gingival margins and just in the 36,36% of the samples.Compoglass offers an acceptable marginal seal for its clinical use in primary dentition.

  5. Specificity of Inferior Olive Response to Stimulus Timing

    OpenAIRE

    liu, T; Xu, D.(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China); Ashe, J; Bushara, K.

    2008-01-01

    The inferior olive is the sole source of the climbing fiber system, one of the two major afferent systems of the cerebellum; however, its exact role remains unknown. A longstanding hypothesis is that the inferior olive with its unique intrinsic rhythmic firing properties mediates motor timing. However, direct evidence linking the inferior olive to timing behavior has been difficult to demonstrate in animal or human studies likely due to the inhibition of inferior olive responses by self-produ...

  6. Influence of inferior olive on flexor reflex activity.

    OpenAIRE

    Rocca, Paola; STRATA, Pier Giorgio

    1986-01-01

    In Wistar rats we have studied the effect of inferior olive lesion or activation on the threshold of a flexor reflex elicited by a nociceptive stimulus applied to the hindpaw. When the inferior olive is lesioned by means of 3-acetylpyridine, the threshold value is significantly decreased. A recovery occurs in 3-4 weeks. When the inferior olive is activated by means of harmaline, the threshold value is significantly increased. These experiments suggest the inferior olive activity exerts an inh...

  7. A novel technique for inferior rectus recession

    Directory of Open Access Journals (Sweden)

    Gokyigit B

    2014-01-01

    Full Text Available Birsen Gokyigit, Serpil Akar, Omer Faruk YilmazDepartment of Strabismus, Istanbul Beyoglu Educational and Research Eye Hospital, Istanbul, TurkeyPurpose: To introduce a novel technique of inferior rectus recession operation to allow larger amounts of recession without causing lower lid retraction and to compare this method with the results obtained in standard inferior rectus recession.Material and methods: This study included 20 patients operated on in the authors' clinic. The median age of the patients was 24.5±18.6 (4–73 years and the median follow-up was 9.3±11.8 (3–43 months. Ten patients operated on with the standard method were labeled Group 1 and ten patients operated on with the new method were labeled Group 2. Without exceeding 4 mm, inferior rectus recession to the whole muscle was performed in Group 1 patients. Inferior rectus recession was also performed on patients in Group 2 following the new method. Using a spatula, approximately 10% of the muscle surface fibers were detached intact as a thin layer, and the remaining 90% of deeper fibers were recessed 4–8 mm as planned. Patients' preoperative deviations and lower lid positions were recorded. The same parameters were checked in the first and third month postoperatively. Both groups were evaluated retrospectively by screening their files, and the Mann–Whitney U test was used for statistical evaluation.Results: Lower lid retraction was seen in four patients of Group 1. There was no retraction in Group 2. While there was a need to perform additional vertical muscle procedures for vertical deviations and lower lid retractions in Group 1, it was observed that there was no need for additional procedures in Group 2 patients. There was a statistically meaningful difference between the two procedures (P<0.05.Conclusion: This novel technique was found to be an effective surgical method for permitting more recession without the risk of lower lid retraction.Keywords: inferior rectus recession, lower lid retraction, ophthalmologic surgical procedures

  8. Filtering through the data on retrievable inferior vena cava filters.

    Science.gov (United States)

    Weinberg, Ido; Drachman, Douglas E

    2015-10-01

    Technical success rates with implantation and retrieval of retrievable inferior vena cava filters are high Inferior vena cava filters are being used for a wide range of indications Systems should be put in place to ensure prompt and effective retrieval of inferior vena cava filters once these are no longer needed. PMID:26386236

  9. Inferior venacaval compression due to excessive abdominal packing

    Directory of Open Access Journals (Sweden)

    M.C.B. Santhosh

    2014-06-01

    Full Text Available Inferior venacaval compression is a common problem in late pregnancy. It can also occur due to compression of inferior venacava by abdominal or pelvic tumors. We report a case of acute iatrogenic inferior venacaval compression due to excessive abdominal packing during an intraabdominal surgery.

  10. Elongational viscosity of narrow molar mass distribution polystyrene

    DEFF Research Database (Denmark)

    Bach, Anders; Almdal, Kristoffer

    2003-01-01

    Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises above the linear viscoelastic prediction at intermediate strains, indicating strain hardening. The steady elongational viscosities are monotone decreasing functions of elongation rate. At elongation rates larger than the inverse reptation time, the steady elongational viscosity scales linearly with molar mass at fixed elongation rate.

  11. Inferior sinus venosus defects: anatomic features and echocardiographic correlates.

    Science.gov (United States)

    Plymale, Jennifer; Kolinski, Kellen; Frommelt, Peter; Bartz, Peter; Tweddell, James; Earing, Michael G

    2013-02-01

    Inferior sinus venosus defects (SVDs) are rare imperfections located in the inferior portion of the atrial septum, leading to an overriding inferior vena cava (IVC) and an interatrial connection. These defects have increased risk of anomalous pulmonary venous return (PAPVR) and often are confused with secundum atrial septal defects (ASDs) with inferior extension. The authors sought to review their experience with inferior SVDs and to establish at their institution an echocardiographic definition that differentiates inferior SVDs from secundum ASDs with inferior extension. The study identified 161 patients 1.5 to 32 years of age who had undergone repair of a secundum ASD with inferior extension or inferior SVD over the preceding 10 years. All surgical notes, preoperative transthoracic echocardiograms (TTEs), and preoperative transesophageal echocardiograms (TEEs) were reviewed. Based on the surgical notes, 147 patients were classified as having a secundum ASD (147/161, 91 %) and 14 patients (9 %) as having an inferior SVD. The study identified PAPVR in 7 % (1/14) of the patients with inferior SVDs and 3.5 % (5/14) of the patients with secundum ASDs. Surgical diagnosis and preoperative TTE correlated for 143 (89 %) of the 161 patients. Using a strict anatomic and echocardiographic definition with a blinded observer, the majority of the defects (14/18, 78 %) were reclassified correctly after review of their TTE images, and 100 % of the defects were correctly reclassified after TEE image review. Accurate diagnosis of inferior SVDs remains challenging. The data from this study demonstrate that use of a strict anatomic and echocardiographic definition (a defect that originates in the mouth of the IVC and continues into the inferoposterior border of the left atrium, leaving no residual atrial septal tissue at the inferior margin) allows for accurate differentiation between secundum ASDs with inferior extension and inferior SVDs. This differentiation is extremely important in planning for surgical versus device closure of these rare defects. PMID:22854830

  12. Caries Management Strategies for Primary Molars

    Science.gov (United States)

    Santamaria, R.M.; Innes, N.P.T.; Machiulskiene, V.; Evans, D.J.P.; Splieth, C.H.

    2014-01-01

    Minimal invasive approaches to managing caries, such as partial caries removal techniques, are showing increasing evidence of improved outcomes over the conventional complete caries removal. There is also increasing interest in techniques where no caries is removed. We present the 1-yr results of clinical efficacy for 3 caries management options for occlusoproximal cavitated lesions in primary molars: conventional restorations (CR; complete caries removal and compomer restoration), Hall technique (HT; no caries removal, sealing in with stainless steel crowns), and nonrestorative caries treatment (NRCT; no caries removal, opening up the cavity, teaching brushing and fluoride application). In sum, 169 children (3-8 yr old; mean, 5.56 ± 1.45 yr) were enrolled in this secondary care–based, 3-arm, parallel-group, randomized clinical trial. Treatments were carried out by specialist pediatric dentists or postgraduate trainees. One lesion per child received CR, HT, or NRCT. Outcome measures were clinical failure rates, grouped as minor failure (restoration loss/need for replacement, reversible pulpitis, caries progression, etc.) and major failure (irreversible pulpitis, abscess, etc.). There were 148 children (87.6%) with a minimum follow-up of 11 mo (mean, 12.23 ± 0.98 mo). Twenty teeth were recorded as having at least 1 minor failure: NRCT, n = 8 (5%); CR, n = 11 (7%); HT, n = 1 (1%) (p = .002, 95% CI = 0.001 to 0.003). Only the comparison between NRCT and CR showed no significant difference (p = .79, 95% CI = 0.78 to 0.80). Nine (6%) experienced at least 1 major failure: NRCT, n = 4 (2%); CR, n = 5 (3%); HT, n = 0 (0%) (p = .002, 95% CI = 0.001 to 0.003). Individual comparison of NRCT and CR showed no statistically significant difference in major failures (p = .75, 95% CI = 0.73 to 0.76). Success and failure rates were not significantly affected by pediatric dentists’ level of experience (p = .13, 95% CI = 0.12 to 0.14). The HT was significantly more successful clinically than NRCT and CR after 1 yr, while pairwise analyses showed comparable results for treatment success between NRCT and CR (ClinicalTrials.gov NCT01797458). PMID:25216660

  13. Apparent molar volumes and compressibilities of selected electrolytes in dimethylsulfoxide

    Energy Technology Data Exchange (ETDEWEB)

    Warminska, Dorota, E-mail: dorota@chem.pg.gda.p [Department of Physical Chemistry, Chemical Faculty, Gdansk University of Technology, 80-233 Gdansk (Poland); Grzybkowski, Waclaw [Department of Physical Chemistry, Chemical Faculty, Gdansk University of Technology, 80-233 Gdansk (Poland)

    2010-12-15

    Densities at T = (293.15, 298.15, 303.15, 313.15, 323.15, and 333.15) K and sound velocities at T = 298.15 K of tetraphenylphosphonium bromide, sodium tetraphenylborate, sodium bromide, and sodium perchlorate in dimethylsulfoxide have been measured over the composition range from (0 to 0.3) mol . kg{sup -1}. From these data, apparent molar volumes and apparent molar isentropic compressibilities at infinite dilution as well as the expansibilities have been evaluated. The results have been discussed in terms of employing tetraphenylphosphonium tetraphenylborate as a reference electrolyte in splitting the limiting apparent molar volumes and apparent molar isentropic compressibilities into ionic contributions.

  14. Intraoperative accidents associated with surgical removal of third molars

    Scientific Electronic Library Online (English)

    Aline Monise, Sebastiani; Sara Regina Barancelli, Todero; Giovana, Gabardo; Delson João da, Costa; Nelson Luis Barbosa, Rebelatto; Rafaela, Scariot.

    2014-12-01

    Full Text Available Aim: To evaluate the prevalence of intraoperative accidents associated with extraction of third molars and identify possible risk factors. Methods: Prospective study with patients undergoing third molar surgery by residents of the Oral and Maxillofacial Surgery Service at the Federal University of P [...] arana. Epidemiological data were collected from preoperative evaluation forms. During the surgical procedure were evaluated the radiographic position classifications of all third molars removed, using methods such as osteotomy and/or tooth section, time for the procedure and occurrence of any complication. Results: The students extracted a total of 323 teeth. The mean surgical time was 45 min. Conclusions: The prevalence of intraoperative accidents during extraction of third molars was 6.19%. The most prevalent accident was maxillary tuberosity fracture, followed by hemorrhage. Age, positioning of the teeth and use of the techniques of osteotomy and tooth section are possible risk factors.

  15. Cryosurgery of the inferior nasal turbinates.

    Science.gov (United States)

    Chiossone, E; Gutierrez, J R; Emmanuelli, J L

    1990-01-01

    Forty-seven patients with irreversible nasal obstruction due to inferior turbinate hypertrophy were treated by cryosurgery, the short and medium term results having been clinically evaluated. Permanent good results in nasal breathing were achieved in 83% of the patients. Failures are mostly related to turbinates hypertrophy due to nasal allergy. The combination of cryosurgery and nasal septoplasty, in cases of hypertrophy associated with deformities of nasal septum, gives an excellent result. Cryosurgery of hypertrophic nasal turbinates is a simple, safe, and reliable procedure to improve nasal breathing in cases of nasal turbinate hypertrophy. PMID:2222333

  16. Leiomiossarcoma de veia cava inferior Leiomiossarcoma of the inferior vena cava

    Directory of Open Access Journals (Sweden)

    Eduardo Crema

    2008-12-01

    Full Text Available Leiomyosarcoma of the inferior vena cava is an extremely rare tumor, and it is reported to have a poor prognosis. The clinical findings are nonspecific and may precede the diagnosis by several years. Symptoms depend on the location and extension of the tumor. A complete surgical resection is the only proven therapeutic modality that prolongs the survival in patients with this lesion. We report a case of a 50 year-old patient with inferior vena cava leiomyosarcoma, who was submitted to a surgical treatment.

  17. 3-D diagnosis-assisted management of anomalous mandibular molar

    OpenAIRE

    Mittal, Neelam; Narang, Isha

    2012-01-01

    This case report describes the successful non-surgical endodontic management of carious exposed three-rooted mandibular molar with four root canals detected on the pre-operative radiograph taken with 20 degrees mesial angulation and confirmed with a 64-slice helical computed tomography scan-assisted 3-D-reconstructed images. Access cavity shape was modified to locate the extra canal with respect to the distolingual root in the left mandibular first molar. Copious irrigation was accomplished w...

  18. Quantitative prediction and molar description of the environment

    OpenAIRE

    Baum, William M.

    1989-01-01

    Molecular explanations of behavior, based on momentary events and variables that can be measured each time an event occurs, can be contrasted with molar explanations, based on aggregates of events and variables that can be measured only over substantial periods of time. Molecular analyses cannot suffice for quantitative accounts of behavior, because the historical variables that determine behavior are inevitably molar. When molecular explanations are attempted, they always depend on hypotheti...

  19. Maxillary molar distalization with miniplates assessed on digital models

    DEFF Research Database (Denmark)

    Cornelis, Marie; De Clerck, Hugo J

    2007-01-01

    INTRODUCTION: The purpose of this prospective study was to evaluate the effects of maxillary molar distalization in patients treated with a miniplate skeletal anchorage system. METHODS: Thirty-one miniplates were placed on the infrazygomatic crests of 17 nongrowing patients consecutively selected for Class II treatment with skeletal anchorage. Three weeks after surgery, a 150-g force was applied to distalize the molars. No appliances were placed in the mandible. Models made before treatment and ...

  20. Gingival enlargement associated with a partially erupted mandibular molar.

    Science.gov (United States)

    Flaitz, C M

    2001-01-01

    Odontogenic lesions may present as enlarged opercula and result in the delayed eruption of teeth. This case report describes the clinical and microscopic features of a peripheral odontogenic fibroma in a 13-year-old boy that involved the overlying gingiva of a partially erupted, mandibular second molar. A differential diagnosis and treatment for lesions presenting as gingival enlargements in the molar region are discussed. PMID:11699171

  1. Iatrogenic Mandibular Fracture Associated with Third Molar Removal

    Directory of Open Access Journals (Sweden)

    Abdulkadir Burak Cankaya, Mehmet Ali Erdem, Sirmahan Cakarer, Muhsin Cifter, Cuneyt Korhan Oral

    2011-01-01

    Full Text Available Third molar extraction is one of the most common procedures performed in oral and maxillofacial surgery units. It is sometimes accompanied by complications such as alveolar osteitis, secondary infection, hemorrhage, dysesthesia and, most severely, iatrogenic fracture. This article describes two mandibular angle fractures that occurred in two patients during the surgical extraction of one erupted and one unerupted third molar, including a brief review of the literature.

  2. Iatrogenic Mandibular Fracture Associated with Third Molar Removal

    OpenAIRE

    Cankaya, Abdulkadir Burak; Erdem, Mehmet Ali; Cakarer, Sirmahan; Cifter, Muhsin; Oral, Cuneyt Korhan

    2011-01-01

    Third molar extraction is one of the most common procedures performed in oral and maxillofacial surgery units. It is sometimes accompanied by complications such as alveolar osteitis, secondary infection, hemorrhage, dysesthesia and, most severely, iatrogenic fracture. This article describes two mandibular angle fractures that occurred in two patients during the surgical extraction of one erupted and one unerupted third molar, including a brief review of the literature.

  3. Relación entre Niveles de Inclusión de Terceros Molares Mandibulares e Índices Antropométricos Físicos de la Mandíbula en Etnias Atacameñas y Aymaras del Norte de Chile / Relationship between Levels of Third Molar Inclusion and Physical Anthropometric Indices of the Mandible in the Atacameño and Aymara Ethnic Groups of Northern Chile

    Scientific Electronic Library Online (English)

    Víctor Javier, Beltrán Varas; Ramón, Fuentes Fernández; Alejandro, Bustos Cortés; Antonio, Sanhueza Campos.

    2011-06-01

    Full Text Available La patología relacionada con el proceso de formación odontogénica, desarrollo y erupción de terceros molares, constituyen uno de los motivos más frecuentes de consulta odontológica. La mayoría de los autores coinciden en que el tercer molar inferior es el diente con mayor frecuencia de inclusión per [...] o existen discrepancias respecto a la influencia de factores ecológicos y raciales que expliquen esa condición. Se sabe que los individuos de un grupo étnico tienen características físicas especiales y esto también se observa a nivel facial de acuerdo a las características del macizo máxilo-mandibular. Esto motivó investigar la relación entre niveles de inclusión de terceros molares mandibulares e índices antropométricos físicos de la mandíbula en grupos étnicos atacameños y aymaras del norte de Chile. De esta población se estableció una muestra de 56 pacientes para la determinación de grupos sanguíneos y factor Rh y establecer el grado de mestizaje. Asimismo se efectuó un examen clínico intra-oral para precisar el estado de erupción o ausencia de terceros molares inferiores y se tomaron ortopantomografías para determinar el estado de inclusión o agenesia de los dientes no visibles en la cavidad oral, a través de la clasificación de profundidad respecto del límite amelo-cementario del segundo molar presente. Finalmente, se procedió a registrar diferentes medidas del macizo máxilo-facial para establecer los índices de la rama bilateral e índice cigo-mandibular en cada uno de los individuos seleccionados. El estudio compara sus resultados con otras investigaciones y pudo determinar en ambas poblaciones indígenas la prevalencia de terceros molares inferiores (85,72% derecha y 83,93% izquierda). Abstract in english The pathology associated with the formation, development and eruption of third molars is one of the most frequent reasons for dental consults. Several authors agree that the third molar is the most frequent inclusion tooth, there is however, disagreement about the influence of environmental and raci [...] al factors that explain this condition. It is known that individuals of one ethnic group have particular physical characteristics, which are also observed at facial level according to characteristics of maxillo-mandibular mass. This prompted research regarding the relationship between levels of third molar inclusion and physical anthropometric indices of the mandible in Atacameño and Aymara ethnic groups in Northern Chile. A sample of 56 patients to determine blood type and Rh factor was established to assess the degree of mixing. An intra-oral clinical examination was also performed to clarify the state of eruption or absence of third molars. Radiographs were taken to determine the inclusion or agenesis if teeth were not visible in the oral cavity, through classification of depth on cementum-enamel boundary of the second molar present. Finally we proceeded to record various measurements of maxillo-facial massif to set the bilateral mandibular ramus and ziggo mandibular indexes in each of the selected individuals. The study compares results with other research and determined in both indigenous populations, the prevalence of third molars (85.72% right, and 83.93% left).

  4. Role of the Molar Volume on Estimated Diffusion Coefficients

    Science.gov (United States)

    Santra, Sangeeta; Paul, Aloke

    2015-09-01

    The role of the molar volume on the estimated diffusion parameters has been speculated for decades. The Matano-Boltzmann method was the first to be developed for the estimation of the variation of the interdiffusion coefficients with composition. However, this could be used only when the molar volume varies ideally or remains constant. Although there are no such systems, this method is still being used to consider the ideal variation. More efficient methods were developed by Sauer-Freise, Den Broeder, and Wagner to tackle this problem. However, there is a lack of research indicating the most efficient method. We have shown that Wagner's method is the most suitable one when the molar volume deviates from the ideal value. Similarly, there are two methods for the estimation of the ratio of intrinsic diffusion coefficients at the Kirkendall marker plane proposed by Heumann and van Loo. The Heumann method, like the Matano-Boltzmann method, is suitable to use only when the molar volume varies more or less ideally or remains constant. In most of the real systems, where molar volume deviates from the ideality, it is safe to use the van Loo method. We have shown that the Heumann method introduces large errors even for a very small deviation of the molar volume from the ideal value. On the other hand, the van Loo method is relatively less sensitive to it. Overall, the estimation of the intrinsic diffusion coefficient is more sensitive than the interdiffusion coefficient.

  5. Standard molar enthalpies of formation of some vinylfuran derivatives

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro da Silva, Manuel A.V. [Centro de Investigacao em Quimica, Department of Chemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal)], E-mail: risilva@fc.up.pt; Amaral, Luisa M.P.F. [Centro de Investigacao em Quimica, Department of Chemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal)

    2009-03-15

    The standard (p{sup 0} = 0.1 MPa) molar enthalpies of combustion, {delta}{sub c}H{sub m}{sup 0}, for crystalline 2-furanacrylic acid, 3-furanacrylic acid, and 3-(2-furyl)-2-propenal and for the liquid 2-furanacrylonitrile were determined, at the temperature 298.15 K, using a static bomb combustion calorimeter. For these compounds, the standard molar enthalpies of phase transition, {delta}{sub cr,l}{sup g}H{sub m}{sup 0}, at T = 298.15 K, were determined by Calvet microcalorimetry. For the two crystalline furanacrylic acids the vapour pressures as function of temperature were measured by the Knudsen effusion technique and the standard molar enthalpies of sublimation, {delta}{sub cr}{sup g}H{sub m}{sup 0}, at T = 298.15 K were derived by the Clausius-Clapeyron equation. The results are presented in a table. These values were used to derive the standard molar enthalpies of formation of the compounds in their condensed and gaseous phases, respectively. For 2-furanacrylic acid and 3-furanacrylic acid, the standard (p{sup 0} = 0.1 MPa) molar enthalpies, entropies, and Gibbs functions of sublimation, at T = 298.15 K, were derived. The derived standard molar enthalpies of formation in the gaseous state are analysed in terms of structural enthalpic increments.

  6. A bracket design proposal for the first molar

    Directory of Open Access Journals (Sweden)

    Roberto Scalon

    2010-07-01

    Full Text Available Introduction: The advent of bracket bonding simplified the assembly of orthodontic braces, besides giving more comfort to the patient and decreasing the risk of decalcification. However, there is no first molar bracket with accessory tube and hooks in the market, except for the convertible type.Objective:To present a patent for utility model of a bracket Roth prescription, Straight-Wire technique for first molar, in order to facilitate orthodontic treatment where there is a need for placing accessories in second molars.Material and methods:This patent consists of a molar bracket for bonding, which contains a retentive base for this, similar to the bracket used in the Edgewise technique,with fins for placing alastic or metal ligature,but containing pre-angles and torques as the tubes of the molar Straight-Wire technique with Roth prescription.It also includes an accessory tube for placing arches or cantilevers and hooks for placing elastics.Results and conclusion:With this bracket design proposal it is possible to obtain an accessory that facilitates the inclusion of the second molar in the assembly of the orthodontic brace without the use of bands.Moreover, this bracket has fins for placing ligatures,accessory tube for placing arches or cantilevers and hooks for placing elastics.

  7. Avaliação da eficácia da analgesia preemptiva na cirurgia de extração de terceiros molares inclusos / Assessment of preemptive analgesia efficacy in surgical extraction of third molars / Evaluación de la eficácia de la analgesia de prevención en la cirugía de extracción de terceros molares incluidos

    Scientific Electronic Library Online (English)

    Jorge Luiz Jacob, Liporaci Junior.

    2012-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A literatura sobre analgesia preemptiva é controversa. A confiabilidade dos resultados e a dificuldade de reprodutibilidade das pesquisas contribuem para a não elucidação do tema. O objetivo desse estudo é testar a eficácia da administração preemptiva de Cetoprofeno 150 mg [...] via oral dois dias antes da cirurgia de extração deterceiros molares, comparando no mesmo paciente com a administração pós-operatória. MÉTODO: Treze pacientes foram submetidos à cirurgia de extração bilateral de terceiros molares inferiores inclusos em dois procedimentos distintos. De forma randomizada e duplo cega, em um procedimento foi administrado Cetoprofeno 150 mg via oral a cada 12 horas dois dias antes da cirurgia e, após o procedimento, continuou-se o mesmo medicamento por mais três dias. De outro lado, foi utilizado um controle (placebo) via oral a cada 12 horas dois dias antes da cirurgia e, após o procedimento, continuou-se o Cetoprofeno 150 mg a cada 12 horas por mais três dias. A dor pós-operatória foi avaliada por meio da escala visual analógica, da escala nominal e da quantidade de consumo de analgésicos de resgate. RESULTADOS: Não foi observada diferença estatisticamente significante na dor pós-operatória entre o tratamento preemptivo e o controle. CONCLUSÃO: Neste modelo experimental, a analgesia preemptiva não se mostrou eficaz na redução da dor pós-operatória na cirurgia de extração de terceiros molares inclusos em comparação com a administração pós-operatória do mesmo medicamento. Abstract in spanish JUSTIFICATIVA Y OBJETIVOS: La literatura sobre la analgesia de prevención es controversial. La confiabilidad de los resultados y la dificultad de reproductibilidad de las investigaciones contribuyen para que el tema no quede clarificado en su totalidad. El objetivo de este estudio, es comprobar la e [...] ficacia de la administración de prevención del Cetoprofeno 150 mg por vía oral dos días antes de la cirugía de terceros molares, comparando al mismo paciente con la administración postoperatoria. MÉTODO: Trece pacientes se sometieron a la cirugía de extracción bilateral de terceros molares inferiores incluidos en dos procedimientos distintos. De forma randomizada y doble ciega, en un procedimiento se administró Cetoprofeno 150 mg por vía oral a cada 12 horas dos días antes de la cirugía y después del procedimiento continuamos con el mismo medicamento por tres días más. Por otra parte, fue utilizado un control (placebo) vía oral a cada 12 horas dos días antes de la cirugía y después del procedimiento se continuó con el Cetoprofeno 150 mg a cada 12 horas por tres días más. El dolor del postoperatorio, se evaluó por medio de la escala visual analógica, de la escala nominal y de la cantidad de consumo de analgésicos de rescate. RESULTADOS: No se observaron diferencias estadísticamente significativas en el dolor postoperatorio entre el tratamiento de prevención y el control. CONCLUSIONES: En este modelo experimental, la analgesia de prevención no fue eficaz en la redución del dolor postoperatorio en la cirugía de extracción de terceros molares incluidos en comparación con la administración postoperatoria del mismo medicamento. Abstract in english BACKGROUND AND OBJECTIVES: Literature on preemptive analgesia is controversial. Reliability of results and difficult reproducibility of research contribute for non-elucidation of the subject. The aim of this study is to test the efficacy of oral ketoprofen (150 mg) preemptively administrated two day [...] s before third molar surgery, compared with postoperative administration in the same patient. METHODS: Thirteen patients underwent surgical removal of bilateral third molar in two separate procedures. In a random and double blind procedure, oral ketoprofen 150 mg was administered every 12 hours two days before surgery and, after the procedure, the same drug was administered for three days. On the other side, a control (placebo) was used orally every 12 hours two days

  8. Inferior oblique muscle thickness in Asians

    Directory of Open Access Journals (Sweden)

    Yasuhiro Takahashi

    2008-06-01

    Full Text Available Yasuhiro Takahashi1, Hirohiko Kakizaki2, Takashi Nakano3, Ken Asamoto3, Masayoshi Iwaki21Department of Ophthalmology and Visual Sciences, Osaka City University Graduate School of Medicine, Asahi-machi, Abeno-ku, Osaka, Japan; 2Department of Ophthalmology; 3Anatomy, Aichi Medical University, Nagakute, Aichi, JapanAbstract: The purpose of this study was to examine the inferior oblique muscle (IOM thickness in Asians by the quasi-sagittal plane of the orbits. Specimens were examined from 23 orbits of 18 Asians (9 orbits in males, 14 in females, aged 63 to 97 years at death. All specimens were fixed in 10% buffered formalin before use. The orbital contents were incised parallel to the optic nerve, after which the lengths of both short and long axes of the IOM were measured and the ratio of short to long axes was calculated. The mean lengths of each short or long axis of the IOM were 2.27 ± 0.49 mm and 7.23 ± 0.97 mm, respectively. The average ratio was 0.32 ± 0.07. There were no significant differences in laterality or gender. This study determined the normal IOM thickness in Asian cadavers, the outcome of which could be useful for detection of IOM involvement in Graves’ orbitopathy.Keywords: inferior oblique muscle, Asian, thickness, quasi-sagittal plane

  9. Caries dental en los primeros molares permanentes en escolares / Dental caries in the first permanent molars in school children

    Scientific Electronic Library Online (English)

    Indira, Gómez Capote; Cristina Victoria, Hernández Roca; Virgilio, León Montano; Ana María, Camacho Suárez; Maureen, Clausell Ruiz.

    2015-06-01

    Full Text Available Introducción: en la edad escolar el diente permanente más afectado por caries dental es el primer molar permanente, y la prevalencia de caries en ellos se asocia con actividad futura de caries. Por erupcionar sin haber exfoliado ningún elemento primario, las madres, desconocen que este es un diente [...] permanente. Su destrucción parcial o total repercute en el desarrollo y crecimiento maxilofacial y la oclusión. Objetivos: describir la afectación por caries dental en los primeros molares permanentes en escolares, así como el conocimiento de la madre sobre estos. Materiales y métodos: se realizó un estudio observacional, descriptivo y transversal en la Escuela Primaria Máximo Gómez, de Alamar, en febrero de 2013. A 211 escolares se le efectuó examen bucal, registrándose los primeros molares sanos, cariados, restaurados y perdidos. Se entrevistaron a las madres para saber sobre su conocimiento del primer molar permanente. Resultados: el 40,3 % tuvo al menos un primer molar permanente afectado. La frecuencia fue, en masculino, 50,6 %, y en la edad de 11 años, 28,2 %. El índice dental cariado obstruido perdido fue en el 26 y 46, de promedio 0,81 y 81 %, respectivamente. El desconocimiento de las madres fue del 64,3 % del total. Conclusiones: casi la mitad de la muestra presenta al menos un primer molar permanente afectado por caries dental y la edad de 11 años es la más frecuente. No se señalan diferencias en cuanto al sexo. La experiencia mayor de caries dental la presentan los molares 46 y 26. La mayoría de las madres no tiene conocimientos acerca del primer molar permanente. Abstract in english Background: in school age, the tooth most affected by dental caries is the first permanent molar, and the caries prevalence in them is associated to the future caries activity. Due to its eruption without the exfoliation of primary elements, mothers do not know that this is a permanent tooth. Its pa [...] rtial or total destruction affects the maxillofacial growth and development and leads to malocclusion. Aims: describing the damage due to dental caries in the first permanent molars in school children, and also their mothers’ knowledge on them. Material and methods: we carried out a cross-sectional, descriptive, observational study in the Primary School Maximo Gómez, of Alamar, in February 2013. Buccal exam was made to 211 schoolchildren, recording the healthy, carious, restored and lost first permanent molars. Mothers were interviewed to identify their knowledge on the first permanent molar. Results: 40,3 % of the sample had at least one permanent molar damaged. The frequency was, in male schoolchildren, 50,6 %, and at the age of 11 years, 28,2 %. The carious-obstructed-lost dental index in the 26 and 46 teeth was an average of 0,81 and 81 % respectively. Mothers’ lack of knowledge was 64,3 % of the total. Conclusions: almost half of the sample had at least one permanent molar damaged by dental caries and the most frequent age is 11 years. There are not differences according to de gender. The highest existence of dental caries is in 26 and 46 molars. Most of the mothers do not know about the first permanent molar.

  10. Standardised studies on Molar Incisor Hypomineralisation (MIH) and Hypomineralised Second Primary Molars (HSPM): a need.

    Science.gov (United States)

    Elfrink, M E C; Ghanim, A; Manton, D J; Weerheijm, K L

    2015-06-01

    In November 2014, a review of literature concerning prevalence data of Molar Incisor Hypomineralisation (MIH) and Hypomineralised Second Primary Molars (HSPM) was performed. A search of PubMed online databases was conducted for relevant articles published until November 2014. The reference lists of all retrieved articles were hand-searched. Studies were included after assessing the eligibility of the full-text article. Out of 1078 manuscripts, a total of 157 English written publications were selected based on title and abstract. Of these 157, 60 were included in the study and allocated as 52 MIH and 5 HSPM, and 3 for both MIH and HSPM. These studies utilised the European Academy of Paediatric Dentistry judgment criteria, the modified index of developmental defects of enamel (mDDE) and self-devised criteria, and demonstrated a wide variation in the reported prevalence (MIH 2.9-44 %; HSPM 0-21.8 %). Most values mentioned were representative for specific areas. More studies were performed in cities compared with rural areas. A great variation was found in calibration methods, number of participants, number of examiners and research protocols between the studies. The majority of the prevalence studies also investigated possible aetiological factors. To compare MIH and HSPM prevalence and or aetiological data around the world, standardisation of such studies seems essential. Standardisation of the research protocol should include a clearly described sample of children (minimum number of 300 for prevalence and 1000 for aetiology studies) and use of the same calibration sets and methods whereas aetiological studies need to be prospective in nature. A standardised protocol for future MIH and HSPM prevalence and aetiology studies is recommended. PMID:25894247

  11. Litterfall, litter decomposition and nitrogen mineralization in old-growth evergreen and secondary deciduous Nothofagus forests in south-central Chile Aporte, descomposición de hojarasca y mineralización de nitrógeno en bosques siempreverdes de antiguo crecimiento y bosques secundarios deciduos, centro-sur de Chile

    Directory of Open Access Journals (Sweden)

    JEROEN STAELENS

    2011-03-01

    Full Text Available South Chilean forest ecosystems represent one of the largest areas of old-growth temperate rainforests remaining in the Southern hemisphere and have a high ecological value, but suffer from deforestation, invasion by exotic species, fragmentation, and increasing atmospheric nitrogen (N deposition. To support sustainable forest management, more knowledge is required on nutrient cycling of these ecosystems. Therefore, a descriptive study of nutrient dynamics was done in four Valdivian rainforests in the lower Andes range of south Chile: old-growth and altered evergreen stands and unmanaged and managed secondary deciduous stands. Time series were measured for (i mass (four year and nutrient content (N, K, Ca, and Mg; one year of litterfall, (ii decomposition and nutrient dynamics (N, C, K, Ca, Mg, and P; one year of leaf litter and Saxegothaea conspicua bark litter, and (iii in situ topsoil net N mineralization (one year. Litterfall in the four stands ranged from 3.5 to 5.8 ton ha-1 yr-1, was temporarily lower in the managed than in the unmanaged deciduous stand and had a different seasonality in the evergreen stands than in the deciduous stands. Leaf litter decomposed faster (on average 32 % mass loss after one year than bark litter (8 % but without significant differences between leaf litter types. Net N in evergreen leaf litter decreased during decomposition but increased in deciduous leaf litter. Net soil N mineralization was fastest in the pristine evergreen stand, intermediate in the deciduous stands and slowest in the altered evergreen forest. Given the absence of replicated stands, the definite impact of forest type or management regime on the internal nutrient cycling cannot be demonstrated. Nevertheless, the results suggest that management can affect nutrient turnover by altering species composition and forest structure, while recent (five years selective logging in secondary deciduous forest did not affect litter decomposition or N mineralization rates in the present study.Los ecosistemas forestales del sur de Chile presentan un gran valor ecológico pues constituyen una de las mayores áreas del hemisferio Sur con existencias de bosques templados lluviosos. Están sometidos a procesos de deforestación, invasión de especies exóticas, fragmentación e incremento de depositación de nitrógeno (N atmosférico. Para apoyar su manejo sustentable se requiere de mayor conocimiento en el ciclo de nutrientes de estos ecosistemas. Se estudia la dinámica de nutrientes en cuatro sitios de bosques lluviosos valdivianos de la precordillera de los Andes, centro-sur de Chile: un bosque siempreverde de antiguo crecimiento prístino y otro alterado, un bosque caducifolio secundario con manejo silvícola y otro sin. Durante el período octubre 2002 -septiembre 2006, se estimaron (i masa de la hojarasca (cuatro años y contenido de nutrientes de la hojarasca (un año, (ii descomposición y dinámica de nutrientes de hojarasca (un año y de la corteza de Saxegothaea conspicua, y (iii mineralización neta de nitrógeno (N-min en el suelo in situ (un año. El aporte de hojarasca en los cuatro sitios fluctúa desde 3.5 hasta 5.8 ton ha-1 año-1, y es temporalmente menor en bosque caducifolio manejado, respecto del caducifolio sin manejo. Además, presentan una estacionalidad en los siempreverdes que es diferente, respecto de los deciduos. La hojarasca se descompone más rápidamente (promedio 32 % pérdida de masa después de un año que la corteza (8 %, pero no se presentaron diferencias significativas en la hojarasca. El N neto en la hojarasca de los bosques siempreverdes disminuye durante la descomposición, pero se incrementa en la hojarasca de los deciduos. La N-mineralización neta del suelo fue completa en el bosque siempreverde prístino, intermedia en los bosques deciduos y el más baja en el bosque siempreverde alterado. Dada la ausencia de réplicas en las parcelas, no puede ser demostrado el impacto definido del tipo de bosque o régimen de manejo en el ciclo interno de nutrientes. Sin embargo, los r

  12. Molars extraction for bone graft study in rabbits / Extração de molares para estudos de enxertos ósseos em coelhos

    Scientific Electronic Library Online (English)

    José Eduardo Ferreira, Manso; Carlos Fernando de Almeida Barros, Mourão; Flávio Alexandre Lima, Pinheiro; Manoel Luiz, Ferreira; Paulo César, Silva; Alberto, Schanaider.

    Full Text Available OBJETIVO: Descrever uma técnica cirúrgica em coelhos para avaliação de enxertos ósseos. MÉTODOS: A técnica operatória consiste numa incisão na topografia da comissura labial até o ultimo molar. Uma incisão de 1cm no rebordo para expor o osso alveolar e a região cervical dos molares. Realizou-se a ex [...] odontia com fórceps e o alvéolo é preenchido com hidroxiapatita. Após o tempo de cicatrização é realizada a avaliação histológica. RESULTADOS: A análise histológica mostrou o novo osso formado rodeando biomaterial. CONCLUSÃO: O modelo cirúrgico para avaliação de enxertos ósseos utilizando molares de coelhos se mostrou factível. Abstract in english PURPOSE: The aim of this study was to describe an experimental surgical technique to be used in the evaluation of bone grafts in rabbits. METHODS: The operative technique was performed in jaws, with external approach from the labial commissure to the last molar tooth. An incision about 1cm extended [...] forward to the alveolar ridge, followed by a exposing the cervical region of the alveolar bone and dental elements was done. Thus, after extraction of first molar with forceps, the tooth socket left was filled with hydroxyapatite. The bone gain was analyzed by histopathological studies. RESULTS: The histological analyses indicated formed bone surrounding the biomaterial. CONCLUSION: The experimental model using the tooth socket of the rabbit molar is a feasible procedure for studies of bone grafts.

  13. Prevalence of missing and impacted third molars in adults aged 25 years and above

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Yun Hoa; Cho, Bong Hae [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Pusan National University, Yansan (Korea, Republic of)

    2013-12-15

    The purpose of this study was to determine the prevalence of missing and impacted third molars in people aged 25 years and above. The study sample of 3,799 patients was chosen randomly from patients who visited Pusan National University Dental Hospital and had panoramic radiographs taken. The data collected included presence and impaction state, angulation, and depth of impaction of third molars, and radiographically detected lesions of third molars and adjacent second molars. A greater percentage of men than women retained at least one third molar. The incidence of third molars decreased with increasing age. The incidence of partially impacted third molars greatly declined after the age of 30. Vertically impacted maxillary third molars and horizontally impacted mandibular third molars were most frequent in all age groups. Among the maxillary third molars, those impacted below the cervical line of the second molar were most frequent in all age groups, and among the mandibular third molars, deeply impacted third molars were most frequent in those aged over 40. Dental caries was the most common radiographic lesion of the third molars. Mesioangularly impacted third molars showed radiographic lesions in 13 (9.5%) adjacent maxillary second molars and 117 (27.4%) mandibular second molars. The number of remaining third molars decreased and the percentage of Class C depth increased with age. Caries was the most frequent lesion in third molars. Partially impacted mesioangular third molars showed a high incidence of caries or periodontal bone loss of the adjacent second molar. Regular oral examination will be essential to keep asymptomatic third molars in good health.

  14. Prevalência de perda precoce de molares decíduos: estudo retrospectivo - DOI: 10.4025/actascihealthsci.v30i2.3943 Prevalence of early loss of deciduous molars: a retrospective study - DOI: 10.4025/actascihealthsci.v30i2.3943

    Directory of Open Access Journals (Sweden)

    Ana Flávia Granville-Garcia

    2008-12-01

    Full Text Available Este estudo retrospectivo determinou a prevalência da perda precoce de molares decíduos em pacientes atendidos na clínica de Odontopediatria da Universidade Estadual da Paraíba. Foram examinados 515 prontuários, sendo os dados registrados em um formulário. Foram analisadas as variáveis: gênero, idade, tipo de molar decíduo perdido, arcada dentária (maxilar ou mandibular e lado (direito e esquerdo. Observou-se que a prevalência de perda precoce foi de 15,1%, existindo uma distribuição similar entre os gêneros. Em relação à idade da criança, a maior freqüência de perda acometeu pacientes com sete anos (32,1%. Houve distribuição equitativa da perda dentária entre as arcadas superior e inferior, com 43,6% cada uma, sendo o lado esquerdo o mais acometido (41%. O segundo molar superior esquerdo foi o mais acometido (17,9%, seguido do primeiro molar decíduo superior direito (16,1%. Pode-se concluir que a prevalência de perda precoce foi baixa e que os molares decíduos superiores foram os dentes mais comumente perdidos.This retrospective study determined the prevalence of early loss of deciduous molars in patients enrolled at the Pediatric Dentistry clinic at the State University of Paraíba. A review of 515 patient records were analyzed, registered in a form. The following variables were analyzed: gender, age, type of deciduous molar loss, region (maxilla or mandible and side (right and left. It was observed that the prevalence of early tooth loss was 15.1% and there was a similar distribution between the genders. In regard to age, the greatest frequency of tooth loss involved patients at 7 years old (32.1%. There was a similar distribution of tooth loss between the maxilla and mandible regions, at 43.6% each, with the left side being the most involved (41%. The second upper left deciduous molar was the most commonly missing tooth (17.9%, followed by the first upper right deciduous molar (16.1%. It can be concluded that the prevalence of early loss was lower and that the upper primary molars were the most commonly missing teeth.

  15. Inferior oblique inclusion, Incidence Early detection and Prevention

    OpenAIRE

    Mahmoud M Saleh

    2010-01-01

    Purpose: To evaluate the incidence of inferior oblique inclusion during hooking of the lateral rectus muscle and how to detect and prevent. Methods : 50 patients (80) eyes operated upon lateral rectus muscles(recession 55 eyes resection 25 eyes ) for correction of horizontal deviation (esotropia and exotropia) the incidence of inferior oblique inclusion during hooking of the lateral rectus muscle throw fornix conjunctival incision was evaluated and managed. Results: the incidence of inferior ...

  16. Iatrogenic displacement of impacted third molar. Case report

    Directory of Open Access Journals (Sweden)

    Konstantinos TSIKLAKIS

    2013-08-01

    Full Text Available Peri-operative complications may occur during the surgical extraction of impacted mandibular third molars such as the iatrogenic displacement of the whole tooth or a tooth fragment in to the adjacent anatomical structures. The purpose of this case report is to present the diagnosis and treatment planning, as well as the surgical management required for the removal of a 3rd molar displaced in the soft tissues of the floor of the mouth. A 38-year old male patient presented to the Dental School, complaining of pain around the left submandibular area that started three months after the extraction of the impacted mandibular left third molar. At the radiographic examination the tooth was detected in the soft tissues of the floor of the mouth and in close proximity to the lingual plate. It is noteworthy that the patient was under the assumption that the tooth had been extracted successfully. Radiographically the tooth appeared at an 180° turnaround from its original position. Surgical extraction of the displaced third molar took place under local anaesthesia. No post-operative complications were reported. Thorough clinical and radiographic examination, as well as competency at surgical procedures are prerequisites for the appropriate surgical management of impacted third molars.

  17. Frequency of unerupted mandibular third molar in mandibular angle fractures

    International Nuclear Information System (INIS)

    Background: Fractures of the mandibular angle are common and comprise 31% of all mandibular fractures. Multiple recent studies report a 2-3 fold increased risk for mandibular angle fractures when un-erupted mandibular third molars are present. The objective of this study was to assess the frequency of un-erupted mandibular third molar in mandibular angle fractures. Methods: This cross sectional study was conducted at the Department of Oral and Maxillofacial Surgery, Ayub Medical College, Abbottabad from April to October 2009. One hundred and two patients were included both from the outdoor and ward on consecutive non-probability sampling base. Data were recorded on a structured Performa and analysed using SPSS-16. Results: A hemi-mandible containing un-erupted mandibular third molar was seen to have a 1.41 times the risk of mandibular angle fracture then a hemi-mandible containing an erupted mandibular third molar. Conclusion: The presence of unerupted mandibular third molar is associated with an increased risk for mandibular angle fracture. (author)

  18. Surgical extraction of mandibular third molar in pterygomandibular space: a case report

    OpenAIRE

    Lee, Young-Kyu; Park, Sung-Soo; Myoung, Hoon

    2013-01-01

    Impacted mandibular third molars are located between the second mandibular molar and mandibular ramus. However, ectopic mandibular third molars with heterotopic positions are reported in the subcondylar or pterygomandibular space. The usual cause of malposition is a cyst or tumor, and malposition without a pathology is rare. This case report described an impacted mandibular third molar in the pterygomandibular space without any associated pathology.

  19. Avaliação da efetividade do método de Tanaka-Johnston para predição do diâmetro mésio-distal de caninos e pré-molares não-irrompidos

    OpenAIRE

    MARCHIONNI Viviane Maria Teixeira; SILVA Maria Catarina de Araújo; ARAÚJO Telma Martins de; Silvia Regina de Almeida REIS

    2001-01-01

    No presente estudo, os autores avaliaram o método de predição de Tanaka-Johnston com o objetivo de verificar sua efetividade para os lados direito e esquerdo, para ambos os sexos e para as raças branca, mulato claro, mulato médio, mulato escuro e negra, na cidade de Salvador - Bahia. Com o auxílio de um paquímetro digital, mediu-se o diâmetro mésio-distal dos incisivos inferiores permanentes, caninos e pré-molares, já irrompidos na cavidade bucal, de 98 indivíduos (45 do sexo masculino e 53 d...

  20. An alternative approach to extruding a vertically impacted lower third molar using an orthodontic miniscrew: A case report with cone-beam CT follow-up

    Energy Technology Data Exchange (ETDEWEB)

    Cortes, Arthur Rodriguez Gonzales; Cavalcanti, Marcelo Gusmaeo Paraiso; Arita, Emiko Saito [Dept. of Oral Radiology, School of Dentistry, University of Saeo Paulo, Saeo Paulo (Brazil); No-Cortes, Julian [Orthodontic Clinic, Saeo Paulo (Brazil)

    2014-06-15

    One of the most common oral surgical procedures is the extraction of the lower third molar (LTM). Postoperative complications such as paresthesia due to inferior alveolar nerve (IAN) injury are commonly observed in cases of horizontal and vertical impaction. The present report discusses a case of a vertically impacted LTM associated with a dentigerous cyst. An intimate contact between the LTM roots and the mandibular canal was observed on a panoramic radiograph and confirmed with cone-beam computed tomographic (CBCT) cross-sectional cuts. An orthodontic miniscrew was then used to extrude the LTM prior to its surgical removal in order to avoid the risk of inferior alveolar nerve injury. CBCT imaging follow-up confirmed the success of the LTM orthodontic extrusion.

  1. An alternative approach to extruding a vertically impacted lower third molar using an orthodontic miniscrew: A case report with cone-beam CT follow-up

    International Nuclear Information System (INIS)

    One of the most common oral surgical procedures is the extraction of the lower third molar (LTM). Postoperative complications such as paresthesia due to inferior alveolar nerve (IAN) injury are commonly observed in cases of horizontal and vertical impaction. The present report discusses a case of a vertically impacted LTM associated with a dentigerous cyst. An intimate contact between the LTM roots and the mandibular canal was observed on a panoramic radiograph and confirmed with cone-beam computed tomographic (CBCT) cross-sectional cuts. An orthodontic miniscrew was then used to extrude the LTM prior to its surgical removal in order to avoid the risk of inferior alveolar nerve injury. CBCT imaging follow-up confirmed the success of the LTM orthodontic extrusion.

  2. Ausência de veia cava inferior: relato de caso / Absence of the inferior vena cava: case report

    Scientific Electronic Library Online (English)

    Elton Correia, Alves; Gabriela Bóia Rocha, Ferro; Luciana Karla Lira, França; Mabel Batista, Jacó; Guilherme Benjamin Brandão, Pitta.

    2010-12-01

    Full Text Available A ausência congênita de veia cava inferior é achado incomum e ocasional durante exames complementares ou cirurgias do abdome. Em razão de a maioria dos pacientes sem outras malformações serem assintomáticos, há dificuldade em estimar a prevalência dessas anomalias. O objetivo deste trabalho foi rela [...] tar o caso de um paciente de 28 anos, sexo masculino, referido para radiografia de tórax devido a quadro de febre alta (39ºC) não-responsiva à medicação. Radiografia de tórax sugeriu dilatação de veia ázigos. Em inquérito dirigido para sintomas cardiovasculares, referiu dor torácica (durante atividade física e em repouso) e dispneia ocasionais durante o sono associada ao período em que intensificou a prática de exercícios. Realizada tomografia computadorizada sem contraste e, posteriormente, contrastada. As mesmas não esclareceram o caso, fazendo-se necessário angiotomografia, a qual evidenciou ausência de veia cava inferior torácica. Abstract in english The congenital absence of the inferior vena cava is a rare and occasional finding at complementary exams or abdominal surgeries. As the majority of patients without other malformations are asymptomatic, it is hard to estimate the prevalence of these anomalies. Our goal was to report a case of a 28-y [...] ear-old patient, male, referred to thorax X-ray due to high fever state (39ºC), nonresponder to medication. The X-ray suggested azygos vein dilatation. The interview about cardiovascular symptoms revealed thoracic pain during both physical exercises and at rest, and occasional dyspnea during sleep related to the period of intensification of physical exercises. Computadorized tomography with and without contrast did not solve the case, what explain the request of an angiotomography, that showed absence of thoracic inferior vena cava.

  3. Ausência de veia cava inferior: relato de caso Absence of the inferior vena cava: case report

    Directory of Open Access Journals (Sweden)

    Elton Correia Alves

    2010-12-01

    Full Text Available A ausência congênita de veia cava inferior é achado incomum e ocasional durante exames complementares ou cirurgias do abdome. Em razão de a maioria dos pacientes sem outras malformações serem assintomáticos, há dificuldade em estimar a prevalência dessas anomalias. O objetivo deste trabalho foi relatar o caso de um paciente de 28 anos, sexo masculino, referido para radiografia de tórax devido a quadro de febre alta (39ºC não-responsiva à medicação. Radiografia de tórax sugeriu dilatação de veia ázigos. Em inquérito dirigido para sintomas cardiovasculares, referiu dor torácica (durante atividade física e em repouso e dispneia ocasionais durante o sono associada ao período em que intensificou a prática de exercícios. Realizada tomografia computadorizada sem contraste e, posteriormente, contrastada. As mesmas não esclareceram o caso, fazendo-se necessário angiotomografia, a qual evidenciou ausência de veia cava inferior torácica.The congenital absence of the inferior vena cava is a rare and occasional finding at complementary exams or abdominal surgeries. As the majority of patients without other malformations are asymptomatic, it is hard to estimate the prevalence of these anomalies. Our goal was to report a case of a 28-year-old patient, male, referred to thorax X-ray due to high fever state (39ºC, nonresponder to medication. The X-ray suggested azygos vein dilatation. The interview about cardiovascular symptoms revealed thoracic pain during both physical exercises and at rest, and occasional dyspnea during sleep related to the period of intensification of physical exercises. Computadorized tomography with and without contrast did not solve the case, what explain the request of an angiotomography, that showed absence of thoracic inferior vena cava.

  4. Sex assessment by molar odontometrics in North Indian population

    Directory of Open Access Journals (Sweden)

    Ramandeep Singh Narang

    2015-01-01

    Full Text Available Introduction: Human identification is based on scientific principles, mainly involving dental records, fingerprints, estimation of age, postmortem reports, differentiation by blood groups, and DNA comparisons. Sex assessment is one of the prime factors employed to assist with the identification of an individual. Aims and Objective: To investigate univariate sex differences in the dimensions of permanent first molars and to assess sex, based on buccolingual (BL and mesiodistal (MD dimensions of permanent first molars in a population of north India. In addition, the study intended to evaluate the reliability of dimensional variation of these teeth in assessment of sex among the population. Materials and Methods: The study sample consists of 410 adult individuals (200 males and 210 females, from a north Indian population. The BL and MD diameters of the permanent first molars were measured using digital vernier callipers. Results: It was observed statistically significant difference between males and females with P < 0.05, in maxillary casts in both BL and MD dimensions; but only in the MD dimension in mandibular casts. A high level of sexual dimorphism of 7.7% was found in the BL dimension of the maxillary right first molar. The accuracy of sex assessment by each dimension was deliberated by univariate analyses with an overall accuracy ranging from 67.5 to 88% for various dimensions. Conclusion: Sexual dimorphism of teeth is population specific and among north Indian population, BL and MD dimensions in maxillary first molar and MD dimension in mandibular first molar can be used for sex assessment.

  5. Autogenous transplantation of mandibular third molar to replace tooth with vertical root fracture

    OpenAIRE

    Asgary, Saeed

    2009-01-01

    Autogenous tooth transplantation (ATT) can be considered when there is a hopeless molar tooth and suitable donor present. This report presents an unconventional case of successful ATT of a third molar replacing the adjacent fractured second molar in a 33 year old woman. This wisdom tooth had completely developed roots. Root-end filling with Calcium Enriched Mixture (CEM) cement was performed in the third molar. The second molar was extracted non-traumatically without any bone removal; the wis...

  6. Análise oclusal de pacientes com má-oclusão de classe ii, tratados com extrações de 4 pré-molares

    Directory of Open Access Journals (Sweden)

    Fernando Alcides José de Souza

    2008-01-01

    Full Text Available Para determinar a estabilidade dos resultados oclusais, após tratamento ortodôntico, realizou-se um estudo comparativo do número de pontos de contato oclusais na posição de máxima intercuspidação habitual em uma amostra composta por 14 pacientes leucodermas, sendo 9 do sexo feminino e 5 do sexo masculino, com má-oclusão de Classe II, divisão 1a de Angle, tratados ortodonticamente com a técnica de Edgewise, e extração dos 4 primeiros pré-molares. Estes pontos foram registrados em dois tempos: T1 - ao final da fase de contenção superior e T2 - após um período médio de 5,2 anos. A contagem dos contatos oclusais foi realizada, separadamente, no arco superior e inferior, na região anterior e posterior. Depois da análise estatística, pôde-se concluir que não houve diferença estatisticamente significante entre o número médio de contatos oclusais nos diferentes períodos estudados.

  7. Displacement of endodontic instruments in inferior alveolar canal

    Directory of Open Access Journals (Sweden)

    Nitasha Gandhi

    2011-01-01

    Full Text Available Endodontic instrument breakage is a common occurrence during root canal treatment but the displacement of the separated instrument into the inferior alveolar canal is rare and has never been reported. We hereby present an unusual case of displacement of a separated instrument in the inferior alveolar canal and its retrieval by a simple technique.

  8. [Renal angiomyolipoma with inferior vena cava thrombosis during pregnancy].

    Science.gov (United States)

    Bidault, V; Pignot, G; Rocher, L; Glas, L; Patard, J-J

    2015-04-01

    The diagnosis of angiomyolipoma with tumor thrombus from the renal vein into the inferior vena cava is rare, especially during pregnancy. We report the case of a 31-year-old pregnant woman who was diagnosed with a 9 cm angiomyolipoma of the right kidney with inferior vena cava thrombosis, managed by active surveillance during pregnancy and delayed surgery after childbirth. PMID:25638747

  9. Eletrocoagulação fracionada para o rejuvenescimento da região orbital inferior

    Directory of Open Access Journals (Sweden)

    Daniel Dal’Asta Coimbra

    2010-09-01

    Full Text Available Diferentes técnicas têm sido descritas na literatura para o rejuvenescimento da pele na região periorbital inferior, incluindo desde os peelings químicos até tecnologias maisatuais, como os Lasers. Inúmeros avanços têm sido obtidos, porém nem sempre os resultados são satisfatórios.Descrevemos nova técnica para o rejuvenescimento da região orbital inferior através da eletrocoagulação puntual das camadas superficiais da pele.

  10. Leiomyosarcoma of the inferior vena cava.

    Science.gov (United States)

    Naphade, Prashant S; Raut, Abhijit A; Hira, Priya; Vaideeswar, Pradip; Vadeyar, Hemant

    2014-05-01

    The purpose of this article is to present the CT features in five cases of pathologically verified Inferior vena cava (IVC) leiomyosarcoma. In this retrospective analysis, we reviewed CT features in 5 cases of clinicopathologically confirmed IVC leiomyosarcoma with respect to its location (infra renal, trans renal, supra renal), its extent (with or without involvement of renal vein, hepatic IVC with or without involvement of hepatic vein, right atrial & extra caval extension) and pattern of enhancement. CT guided biopsy was performed in four patients while the last patient underwent successful resection of the tumor. Three male and two female patients (aged 45 to 72 years) were included in the study. Heterogeneously enhancing retroperitoneal mass involving IVC is the most common imaging feature. The intra and extra luminal extension was demonstrated excellently in all patients. IVC leiomyosarcoma is a rare neoplasm often presenting very late with non-specific symptoms. Cross sectional imaging establishes the exact location and extension and plays a vital role in determining the resectibility and planning the management. PMID:24784870

  11. El Trípode en la distalización unilateral de molares superiores: Cambios oclusales / The tripod in the unilateral distalization of superior molars: Occlusal changes

    Scientific Electronic Library Online (English)

    Ania, Moreno Véliz; Ramón, Gómez Ávila; Maiyelín, Llanes Rodríguez; Yulenia, Cruz; Liuba, Gardón Delgado.

    2008-06-01

    Full Text Available OBJETIVO: aumentar los conocimientos en los tratamientos distalizadores, se realizó este estudio con una técnica distalizadora novedosa: el Trípode. MÉTODOS: el estudio incluyó 6 pacientes con clase II de Angle por mesogresión de los molares superiores y con ausencia clínica del segundo molar superi [...] or. Se evaluaron las modificaciones a nivel dental producidas por el trípode. RESULTADOS: los primeros molares superiores se distalizaron (3.36 mm), además, el molar sufrió una inclinación distal; las segundas bicúspides siguieron al molar en su movimiento distal, mientras que, la primera bicúspide del lado de la distalización se mesializó; los incisivos resultaron vestibularizados y la anchura transversal, medida a nivel de los primeros molares y primeras bicúspides, disminuyó, mientras que, en las segundas bicúspides aumentó. CONCLUSIONES: los cambios producidos con esta aparatología a nivel dental han sido: distalización de los primeros molares superiores (3.36 mm), además, el molar sufrió una inclinación distal; las segundas bicúspides siguieron al primer molar en su movimiento distal, mientras que, la primera bicúspide del lado de la distalización se mesializó; los incisivos resultaron vestibularizados; la anchura transversal medida a nivel de los primeros molares y primeras bicúspides disminuyó, mientras que, en las segundas bicúspides aumentó Abstract in english OBJECTIVE: to enhance the knowledge of the distalizing treatments, a study was conducted with a distalizing novel technique: the tripod. METHODS: the study included 6 patients with Angle class II due to mesogression of the superior molars and with clinical absence of the second superior molar. The m [...] odifications produced by the tripod at the dental level were evaluated. RESULTS: The first superior molars were distalized (3.36 mm). The molar also suffered a distal inclination, the second bicuspids followed the molar in its distal movement, whereas the first bicuspid of the side of the distalization was mesialized. The incisive were vestibularized and the cross-sectional width measured at the level of the first molars and the first bicuspids decreased, while in the second bicuspids increased. CONCLUSIONS: the changes caused by this apparatology at the dental level were the following: distalization of the first superior molars (3.36 mm); besides, the molar suffered a distal inclination; the second bicuspids followed the first molar in its distal movement, whereas the first bicuspid of the side of the distalization was mesialized; the incisives were vestibularized; the cross-sectional width measured at the level of the first molars and first bicuspids decreased, but in the second bicuspids it increased

  12. El Trípode en la distalización unilateral de molares superiores: Cambios oclusales The tripod in the unilateral distalization of superior molars: Occlusal changes

    Directory of Open Access Journals (Sweden)

    Ania Moreno Véliz

    2008-06-01

    Full Text Available OBJETIVO: aumentar los conocimientos en los tratamientos distalizadores, se realizó este estudio con una técnica distalizadora novedosa: el Trípode. MÉTODOS: el estudio incluyó 6 pacientes con clase II de Angle por mesogresión de los molares superiores y con ausencia clínica del segundo molar superior. Se evaluaron las modificaciones a nivel dental producidas por el trípode. RESULTADOS: los primeros molares superiores se distalizaron (3.36 mm, además, el molar sufrió una inclinación distal; las segundas bicúspides siguieron al molar en su movimiento distal, mientras que, la primera bicúspide del lado de la distalización se mesializó; los incisivos resultaron vestibularizados y la anchura transversal, medida a nivel de los primeros molares y primeras bicúspides, disminuyó, mientras que, en las segundas bicúspides aumentó. CONCLUSIONES: los cambios producidos con esta aparatología a nivel dental han sido: distalización de los primeros molares superiores (3.36 mm, además, el molar sufrió una inclinación distal; las segundas bicúspides siguieron al primer molar en su movimiento distal, mientras que, la primera bicúspide del lado de la distalización se mesializó; los incisivos resultaron vestibularizados; la anchura transversal medida a nivel de los primeros molares y primeras bicúspides disminuyó, mientras que, en las segundas bicúspides aumentóOBJECTIVE: to enhance the knowledge of the distalizing treatments, a study was conducted with a distalizing novel technique: the tripod. METHODS: the study included 6 patients with Angle class II due to mesogression of the superior molars and with clinical absence of the second superior molar. The modifications produced by the tripod at the dental level were evaluated. RESULTS: The first superior molars were distalized (3.36 mm. The molar also suffered a distal inclination, the second bicuspids followed the molar in its distal movement, whereas the first bicuspid of the side of the distalization was mesialized. The incisive were vestibularized and the cross-sectional width measured at the level of the first molars and the first bicuspids decreased, while in the second bicuspids increased. CONCLUSIONS: the changes caused by this apparatology at the dental level were the following: distalization of the first superior molars (3.36 mm; besides, the molar suffered a distal inclination; the second bicuspids followed the first molar in its distal movement, whereas the first bicuspid of the side of the distalization was mesialized; the incisives were vestibularized; the cross-sectional width measured at the level of the first molars and first bicuspids decreased, but in the second bicuspids it increased

  13. Term Pregnancy with Partial Molar Changes of Placenta

    OpenAIRE

    Amita Gupta,Yudhister Veer Gupta

    2003-01-01

    A rare case report of successful term pregnancy with partial molar changes of placenta is beingreported. The patient was 2nd gravida with twin pregnancy with pregnancy induced hypertension(Pili). Patient under went LSCS and gave birth to two healthy looking babies. She was followed upand serum HCG (Human Chorinic Gouadotrophin) level returned to normal within 4 weeks afterdelivery.

  14. Term Pregnancy with Partial Molar Changes of Placenta

    Directory of Open Access Journals (Sweden)

    Amita Gupta,Yudhister Veer Gupta

    2003-04-01

    Full Text Available A rare case report of successful term pregnancy with partial molar changes of placenta is beingreported. The patient was 2nd gravida with twin pregnancy with pregnancy induced hypertension(Pili. Patient under went LSCS and gave birth to two healthy looking babies. She was followed upand serum HCG (Human Chorinic Gouadotrophin level returned to normal within 4 weeks afterdelivery.

  15. Miniscrew-supported coil spring for molar uprighting: description

    Scientific Electronic Library Online (English)

    Antônio Carlos de Oliveira, Ruellas; Matheus Melo, Pithon; Rogério Lacerda dos, Santos.

    2013-02-01

    Full Text Available INTRODUÇÃO: desde o surgimento dos mini-implantes como recurso de ancoragem ortodôntica, muitas aplicações têm sido descritas na literatura. Entre essas, cita-se a verticalização de molares inclinados para mesial. No entanto, pouco se fala da correta aplicação das forças ortodônticas nesses disposit [...] ivos, sob o ponto de vista mecânico. OBJETIVOS: o objetivo desse artigo foi demonstrar uma mola mini-implante suportada para verticalizar molares inclinados para mesial. Com esse dispositivo consegue-se correta aplicação da mecânica ortodôntica, favorecendo movimentos mais previsíveis e minimizando os movimentos indesejáveis. Abstract in english INTRODUCTION: Since the beginning of miniscrews as orthodontic anchorage, many applications have been described in the literature. Among these, one is the uprighting of mesially inclined molars. In regard to the mechanical aspects, however, there is little information about the application of orthod [...] ontic forces using such devices. OBJECTIVE: The objective of this study was to describe a miniscrew supported spring for uprighting of mesially inclined molars. With this device, one can achieve the correct use of orthodontic biomechanics, thus favoring more predictable tooth movements and preventing unwanted movements from occurring.

  16. Inflammatory root resorption in primary molars: prevalence and associated factors

    Directory of Open Access Journals (Sweden)

    Raquel Gonçalves Vieira-Andrade

    2012-08-01

    Full Text Available This study aimed at determining the prevalence of inflammatory root resorption and associated factors in 1068 primary mandibular molars in 453 children 3 to 12 years of age. Age, dental history and medical history were recorded using a questionnaire administered to the children's parents/caregivers. Previously trained and calibrated examiners assessed radiographic images of the primary molars by direct observation, with the aid of a viewing box. Root resorption (physiological or inflammatory, dental crown status (healthy, carious with no pulp involvement, carious with pulp involvement and evidence of restoration, and pulpotomy or pulpectomy were determined. Data analysis involved descriptive statistics, the chi-square test and a multiple logistic regression (p < 0.05. The prevalence of inflammatory root resorption was 16.2% (n = 173. The male gender (OR: 1.4; 95% CI, the 3-to-7-years age bracket (OR: 1.5; 95% CI, an unhealthy dental crown (OR: 8.7; 95% CI, caries with pulp involvement (OR: 7.4; 95% CI, pulpotomy (OR: 3.1; 95% CI, and pulpectomy (OR: 5.4; 95% CI were risk factors for the occurrence of inflammatory root resorption in primary molars. In conclusion, the prevalence of inflammatory root resorption in the present sample was 16.2%. Gender, age, an unhealthy tooth, caries with pulp involvement, pulpotomy, pulpectomy, and the absence of a restoration were associated with a higher occurrence of inflammatory root resorption in primary molars.

  17. Partial Molar Volume of Methanol in Water: Effect of Polarizability.

    Czech Academy of Sciences Publication Activity Database

    Mou?ka, F.; Nezbeda, Ivo

    2009-01-01

    Ro?. 74, ?. 4 (2009), s. 559-563. ISSN 0010-0765 R&D Projects: GA AV ?R IAA400720802 Institutional research plan: CEZ:AV0Z40720504 Keywords : water–methanol mixtures * partial molar volume * polarizability Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 0.856, year: 2009

  18. Standard molar enthalpies of formation of 1- and 2-cyanonaphthalene

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro da Silva, Manuel A.V., E-mail: risilva@fc.up.pt [Centro de Investigacao em Quimica, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Lobo Ferreira, Ana I.M.C.; Barros, Ana L.M.; Bessa, Ana R.C.; Brito, Barbara C.S.A.; Vieira, Joana A.S.; Martins, Silvia A.P. [Centro de Investigacao em Quimica, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal)

    2011-09-15

    Highlights: > Enthalpies of formation of 1- and 2-cyanonaphthalene were measured by combustion calorimetry. > Vapor pressures of crystalline 1- and 2-cyanonaphthalene obtained by Knudsen effusion mass loss technique. > Enthalpies, entropies and Gibbs functions of sublimation at T = 298.15 K were calculated. - Abstract: The standard (p{sup o} = 0.1 MPa) molar enthalpies of formation, in the crystalline state, of the 1- and 2-cyanonaphthalene were derived from the standard molar energies of combustion, in oxygen, at T = 298.15 K, measured by static-bomb combustion calorimetry. Vapor pressure measurements at different temperatures, using the Knudsen mass loss effusion technique, enabled the determination of the enthalpy, entropy, and Gibbs energy of sublimation, at T = 298.15 K, for both isomers. The standard molar enthalpies of sublimation, at T = 298.15 K, for 1- and 2-cyanonaphthalene, were also measured by high-temperature Calvet microcalorimetry. (table) Combining these two experimental values, the gas-phase standard molar enthalpies, at T = 298.15 K, were derived and compared with those estimated by employing two different methodologies: one based on the Cox scheme and the other one based on G3MP2B3 calculations. The calculated values show a good agreement with the experimental values obtained in this work.

  19. Prediction of postoperative pain after mandibular third molar surgery

    DEFF Research Database (Denmark)

    Rudin, Asa; Eriksson, Lars; Liedholm, Rolf; List, Thomas; Werner, Mads Utke

    2010-01-01

    To evaluate the predictive potential of preoperative psychological and psychophysiological variables in estimating severity of postoperative pain following mandibular third molar surgery (MTMS). Methods: Following ethical committee approval and informed consent, 40 consecutive patients scheduled for MTMS were included. Preoperative psychometric indicators of anxiety, depression, and vulnerability were evaluated by patient questionnaires. Thermal thresholds and heat pain perception (1 second phas...

  20. Inferior patellar pole fragmentation in children: just a normal variant?

    Energy Technology Data Exchange (ETDEWEB)

    Kan, J.H.; Vogelius, Esben S.; Orth, Robert C.; Guillerman, R.P.; Jadhav, Siddharth P. [Texas Children' s Hospital, E.B. Singleton Pediatric Radiology, Houston, TX (United States)

    2015-06-15

    Fragmentary ossification of the inferior patella is often dismissed as a normal variant in children younger than 10 years of age. The purpose of this study was to determine whether fragmentary inferior patellar pole ossification is a normal variant or is associated with symptoms or signs of pathology using MRI and clinical exam findings as reference. A retrospective review was performed on 150 patients ages 5-10 years who underwent 164 knee radiography and MRI exams (45.1% male, mean age: 7.8 years). The presence or absence of inferior patellar pole fragmentation on radiography was correlated with the presence or absence of edema-like signal on MR images. Clinical notes were reviewed for the presence of symptoms or signs referable to the inferior patellar pole. These data were compared with a 1:1 age- and sex-matched control group without inferior pole fragmentation. Statistical analysis was performed using two-tailed t-tests. Forty of 164 (24.4%) knee radiographs showed fragmentary ossification of the inferior patella. Of these 40 knees, 62.5% (25/40) had edema-like signal of the inferior patellar bone marrow compared with 7.5% (3/40) of controls (P = 0.035). Patients with fragmentary ossification at the inferior patella had a significantly higher incidence of documented focal inferior patellar pain compared with controls (20% vs. 2.5%, P = 0.015). Inferior patellar pole fragmentation in children 5 to 10 years of age may be associated with localized symptoms and bone marrow edema-like signal and should not be routinely dismissed as a normal variant of ossification. (orig.)

  1. Estudio de volumen molar y refracción molar de miscelas de triglicéridos (triacetina, tributirina o tricaprilina y alcoholes (etanol, 1-butanol o 1-hexanol

    Directory of Open Access Journals (Sweden)

    Rodríguez Rodríguez, M.

    1992-12-01

    Full Text Available Values of molar refraction for every studied mixtures show linear plots versus molar fractions of triglyceride. Values of molar volume show this behaviour, but only for tributyrin-butanol or tricaprylin-butanol miscellas. However, in tributyrin-ethanol mixtures, volume contractions have been found, whereas triacetin-butanol and tributyrin-hexanol show volume expansions. These facts are related to the mode of being structured of the alcohol and triglyceride molecules in mixtures. A linear relationship between molar volume and temperature have been found, and also a linear dependence between the coefficient of thermal expansion at constant pressure and the molar fraction of triglyceride.

    Los valores de la refracción molar en todas las miscelas estudiadas presentan variaciones lineales frente a la fracción molar de triglicérido. la misma variación que presentan los valores del volumen molar de las miscelas tributirina y tricaprilina en butanol. Sin embargo, en las miscelas de tributirina-etanol se encuentran contracciones de volumen mientras que en las de triacetina-butanol y tributirina-hexanol expansiones, atribuidas en ambos casos a la forma de estructurarse las moléculas de alcohol y triglicérido en las miscelas. Por otra parte, se encuentra una variación lineal entre el volumen molar de las miscelas y la temperatura, y se establece una relación lineal entre el coeficiente de dilatación térmico molar a presión constante y la fracción molar de triglicérido en los cinco sistemas estudiados.

  2. Unilateral Recession-Resection Surgery with Inferior Displacement Combined with Augmented Anterior Transposition of Inferior Oblique Muscle

    OpenAIRE

    Hong, Samin; Hong, Young Taek; Seong, Gong Je; Han, Sueng-Han

    2010-01-01

    We report the effects of unilateral recession-resection surgery of the horizontal recti muscles with inferior displacement and augmented anterior transposition of the inferior oblique muscle with a posterior intermuscular suture in a patient with large exotropia and considerable hypertropia.

  3. Cateterização dos seios petrosos inferiores: aspectos técnicos / Inferior petrosal sinus catheterization: technical aspects

    Scientific Electronic Library Online (English)

    Paulo, Puglia Jr.; José G. M. P., Caldas; Leandro A., Barbosa; Antenor T., Sá Jr.; Márcio C., Machado; Luis R., Salgado.

    2008-06-01

    Full Text Available OBJETIVO: O cateterismo dos seios petrosos inferiores (SPI) ajuda a diferenciar as formas hipofisária e ectópica na síndrome de Cushing (SC). O objetivo desse trabalho é descrever a técnica empregada em nosso serviço, discutir a solução de dificuldades e verificar o índice de sucesso atingido. CASUÍ [...] STICA E MÉTODO: Foram submetidos a cateterismo bilateral dos SPI 42 pacientes com SC, entre setembro de 2000 e setembro de 2005. As dificuldades para o posicionamento do cateter foram correlacionadas com as soluções empregadas. RESULTADOS: As variações anatômicas, a semelhança entre o SPI e a veia emissária do plexo basilar e a dificuldade de contrastar as estruturas a contrafluxo para localizá-las foram os principais problemas. Foram utilizados cateter pré-moldado, fio-guia semicurvo e dirigível, road-maping e venografia por injeção contralateral, além de critérios para diferenciar o SPI da veia emissária. Dos 84 SPI abordados, um apresentava trombose, e dos 83 possíveis, 80 (96,4%) foram cateterizados. Não se observaram complicações. CONCLUSÃO: A cateterização dos SPI pode ser feita na maioria dos pacientes. A identificação da veia emissária do plexo basilar e o uso de flebografia por injeção contralateral melhoraram o desempenho do método. Abstract in english PURPOSE: Inferior petrosal sinus catheterization and sampling for corticotropin dosage helps to differentiate hypophisary and ectopic forms of Cushing syndrome. The aim of this paper is to describe the technique used in inferior petrosal sinus catheterization in our service, emphasizing the solution [...] found for frequent difficulties, and verify the success rate achieved. PATIENTS AND METHODS: Between September/2000 and September/2005, forty-two (eighty-four sinuses) patients were submitted to inferior petrosal sinus sampling. The difficulties for correct catheter positioning were identified and correlated with their solutions. RESULTS: Anatomical variations, similarity between IPS and emissary vein of the basilar plexus and unfavorable flow to the contrastation of the structures (retrograde catheterization) were the main problems. Using pre-shaped catheters, curved, steerable guide-wires, road-maping and venography by contalateral injection, besides criteria to differentiate IPS from the emissary vein. Of the 84 sinuses approached, one was thrombosed, and 80 (96.4%) of 83 possible were selectively catheterized. No clinical complication occurred. CONCLUSION: IPSC can be safe and successfully performed in most cases. The identification of the emissary vein of the basilar plexus and use of venography by contralateral injection, improved the method performance.

  4. Cateterização dos seios petrosos inferiores: aspectos técnicos Inferior petrosal sinus catheterization: technical aspects

    Directory of Open Access Journals (Sweden)

    Paulo Puglia Jr.

    2008-06-01

    Full Text Available OBJETIVO: O cateterismo dos seios petrosos inferiores (SPI ajuda a diferenciar as formas hipofisária e ectópica na síndrome de Cushing (SC. O objetivo desse trabalho é descrever a técnica empregada em nosso serviço, discutir a solução de dificuldades e verificar o índice de sucesso atingido. CASUÍSTICA E MÉTODO: Foram submetidos a cateterismo bilateral dos SPI 42 pacientes com SC, entre setembro de 2000 e setembro de 2005. As dificuldades para o posicionamento do cateter foram correlacionadas com as soluções empregadas. RESULTADOS: As variações anatômicas, a semelhança entre o SPI e a veia emissária do plexo basilar e a dificuldade de contrastar as estruturas a contrafluxo para localizá-las foram os principais problemas. Foram utilizados cateter pré-moldado, fio-guia semicurvo e dirigível, road-maping e venografia por injeção contralateral, além de critérios para diferenciar o SPI da veia emissária. Dos 84 SPI abordados, um apresentava trombose, e dos 83 possíveis, 80 (96,4% foram cateterizados. Não se observaram complicações. CONCLUSÃO: A cateterização dos SPI pode ser feita na maioria dos pacientes. A identificação da veia emissária do plexo basilar e o uso de flebografia por injeção contralateral melhoraram o desempenho do método.PURPOSE: Inferior petrosal sinus catheterization and sampling for corticotropin dosage helps to differentiate hypophisary and ectopic forms of Cushing syndrome. The aim of this paper is to describe the technique used in inferior petrosal sinus catheterization in our service, emphasizing the solution found for frequent difficulties, and verify the success rate achieved. PATIENTS AND METHODS: Between September/2000 and September/2005, forty-two (eighty-four sinuses patients were submitted to inferior petrosal sinus sampling. The difficulties for correct catheter positioning were identified and correlated with their solutions. RESULTS: Anatomical variations, similarity between IPS and emissary vein of the basilar plexus and unfavorable flow to the contrastation of the structures (retrograde catheterization were the main problems. Using pre-shaped catheters, curved, steerable guide-wires, road-maping and venography by contalateral injection, besides criteria to differentiate IPS from the emissary vein. Of the 84 sinuses approached, one was thrombosed, and 80 (96.4% of 83 possible were selectively catheterized. No clinical complication occurred. CONCLUSION: IPSC can be safe and successfully performed in most cases. The identification of the emissary vein of the basilar plexus and use of venography by contralateral injection, improved the method performance.

  5. Mudanças na apresentação clínica da gravidez molar / The changing clinical presentation of molar pregnancy

    Scientific Electronic Library Online (English)

    Paulo, Belfort; Antônio, Braga.

    2004-07-01

    Full Text Available OBJETIVO: determinar se a apresentação clínica da mola hidatiforme tem mudado nos últimos anos (1992-1998) quando comparada a registros históricos de controle (1960-1981). MÉTODOS: foram revisadas 80 fichas de pacientes com mola hidatiforme acompanhadas entre 1960-1981 no Centro de Neoplasia Trofobl [...] ástica Gestacional da Santa Casa da Misericórdia (Rio de Janeiro Brasil) e as de 801 pacientes atendidas entre 1992-1998 no mesmo centro. Foram analisados os seguintes parâmetros: idade, número de gestações, sangramento vaginal, hiperêmese, edema dos membros inferiores, hipertensão arterial, útero grande para a idade gestacional e cistos teca-luteínicos dos ovários. Para análise estatística foram utilizados os testes do qui-quadrado e o cálculo do odds ratio (OR) com intervalo de confiança (IC) de 95%. RESULTADOS: com relação à idade, a ocorrência de mola em pacientes com menos de 15 anos ou mais de 40 foi significativamente mais freqüente no grupo II do que no grupo I; quanto ao número de gestações, a diferença entre os dois grupos só não foi significativa entre aquelas pacientes que gestavam pela terceira e quarta vez. A hipertensão arterial, foi detectada em porcentagem semelhante nos dois grupos e útero grande para a idade gestacional foi mais freqüente no grupo II (41,4 vs 31,2% - p Abstract in english OBJECTIVE: to determine whether the clinical presentation of hydatidiform mole has changed in the recent years (1992-1998) when compared with historic controls (1960-1981). METHODS: medical records of 80 patients with hydatidiform mole attended in the 1960-1981 period (Group I) were reviewed and com [...] pared to data from 801 patients followed in the 1992-1998 period (Group II). The clinical signals and symptoms analyzed were: age distribution, number of pregnancies, vaginal bleeding, hyperemesis, edema, hypertension, large uterus for gestation date and theca lutein cysts of the ovaries. Statistical analyses employed chi-square tests and odds ratio (OR) estimate with the confidence interval (CI) of 95%. RESULTS: concerning age, the disease occurred more frequently in group II than in group I, in patients under 15 and over 40 years old. As to the number of pregnancies, there was no statistical difference only in those patients who were in their third or fourth pregnancies. Arterial hypertension was the only symptom that occurred with similar frequency in both groups. Enlarged uterus was more frequent in group II (41.4 X 31.2% - p

  6. Exodoncia del tercer molar: Factores que determinan complejidad

    Directory of Open Access Journals (Sweden)

    Ivan Manotas Arevalo

    2014-06-01

    Full Text Available ResumenUno de los procedimientos más frecuentes en el campo de la Cirugía Oral es la exodoncia, o extracción dental. La prevención y la promoción de hábitos saludables dentro de los que se cuenta la práctica del cepillado dental, uso de dentífricos, hilo dental y enjuagatorios bucales, además de visitas periódicas de control a especialistas y odontólogos generales e higienistas bucales ha conllevado a una reducción en la perdida de estructuras dentarias por causa de la caries y las periodontopatìas. Sin embargo se mantiene alto el número de exodoncias indicadas por falta de espacio en la estructura de los maxilares para la erupción dental, así como alteraciones en la posición y angulacion de los órganos dentales sobre su eje que impide una adecuada ubicación logrando que se indique su extracción. Dentro de la serie dental los órganos dentarios más frecuentemente afectados por este tipo de alteraciones son los terceros molares. También se mencionan que son esos mismos dientes los que acusan mayor grado de complejidad para realizar el procedimiento de exodoncia, y los que causan mayor grado de morbilidad posquirúrgica en el paciente, con un número mayor de complicaciones y su severidad, descritas en la literatura. (Duazary 2008; 141-147. Este artículo pretende analizar los factores que determinan complejidad en la exodoncia del tercer molar a partir de una revisión bibliografía y comparación de ésta.AbstractOne of the most frequent procedure used in the field of Oral Surgery is extracted, or tooth extraction. The prevention and promoting healthy habits in mind that the practice of brushing teeth, use of toothpastes, mouthwashes and dental floss mouth, in addition to regular monitoring visits to specialists and general dentists and oral hygiene has led to a reduction in the loss of structures caused by tooth decay and periodontal pathology. However remains high number of extractions indicated by lack of space in the structure of the jaw to the tooth eruption, as well as changes in the position and angle of dental bodies on its axis which prevents a proper location are indicated achieving extraction. Within the series dental bodies teeth more frequently affected by such changes are the third molars. He also mentioned that the teeth are those who accuse greater degree of complexity to perform the extraction procedure, and causing greater morbidity in post surgical patients, with more complications and their severity, described in the literature. This article aims to analyze the factors that determine complexity in the third molar extraction from a literature review and compare it.Key Words: third molars; exodontia; surgery third molars; complex dental extraction; prediction of complexity.

  7. In vitro evaluation of the resistance of a 2.0-mm titanium fixation system in the sectioned angle without continuity of the inferior border of the mandible.

    Science.gov (United States)

    Trivellato, P F B; Pepato, A O; Ribeiro, M C; Sverzut, C E; Trivellato, A E

    2014-05-01

    The aim of this in vitro study was to evaluate the mechanical resistance of a 2.0-mm titanium system applied to the mandibular angle, either with or without continuity of the inferior border of the mandible. Polyurethane mandibles were used as substrates and divided into two groups: unfavourable and favourable to treatment. A single cut was made through the retromolar region, simulating an angle fracture either unfavourable or favourable to treatment. In addition, a small fragment of the inferior border of the mandible was removed in some of the mandibles, creating a discontinuity. The fragments were stabilized in accordance with the technique of Champy et al. The substrates were adapted to a universal mechanical testing machine and submitted to a constant load applied at three different points; load values were obtained at three different moments of displacement: 1mm, 2mm, and fixation failure. The value of the tip dislocation at final displacement was obtained. When the load was applied at the first molars, regardless of the side, no statistically significant difference was observed between the groups. When the load was applied at the central incisors, a statistically significant difference was observed at fixation failure in the unfavourable to treatment group, with better results in the subgroup with continuity of the inferior border of the mandible compared to the subgroup without continuity. Discontinuity of the inferior border of the mandible did not decrease the mechanical resistance of the fixation. PMID:24216298

  8. Inferior venacaval compression due to excessive abdominal packing / Comprensión de la vena cava inferior debido al exceso de taponamiento abdominal / Compressão da veia cava inferior por causa do excesso de tamponamento abdominal

    Scientific Electronic Library Online (English)

    M.C.B., Santhosh; Rohini Bhat, Pai; Roopa, Sachidanand; Varun, Byrappa; Raghavendra P., Rao.

    2014-06-01

    Full Text Available Compressão da veia cava inferior é um problema comum no fim da gravidez. Também pode ocorrer por causa da compressão da veia cava inferior por tumores abdominais ou pélvicos. Relatamos um caso de compressão iatrogênica aguda da veia cava inferior por causa do excesso de tamponamento durante uma ciru [...] rgia intra-abdominal. Abstract in spanish La compresión de la vena cava inferior es un problema común al final del embarazo. También puede ocurrir debido a la compresión de la vena cava inferior por tumores abdominales o pélvicos. Relatamos un caso de compresión iatrogénica aguda de la vena cava inferior debido al exceso de taponamiento dur [...] ante una cirugía intraabdominal. Abstract in english Inferior venacaval compression is a common problem in late pregnancy. It can also occur due to compression of inferior venacava by abdominal or pelvic tumors. We report a case of acute iatrogenic inferior venacaval compression due to excessive abdominal packing during an intraabdominal surgery. [...

  9. Density and molar volume studies of phosphate glasses

    Directory of Open Access Journals (Sweden)

    Chanshetti U.B.

    2011-01-01

    Full Text Available The density and molar volume of some phosphate glasses (xNa2O•(100-xP2O5, x = 30, 35, 40, 45, 50; xB2O3•(1-xNaPO3, x = 5, 10, 15, 20, 25; xNa2O•(30-x K2O•10Al2O3• 25B2O3•35P2O5, x= 5, 10, 15, 20, 25 glasses were determined, in order to study their structure. The density of the glasses increased while their molar volume values decreases with the increase of sodium oxide content in phosphate glasses. The results obtained could be correlated to several factors such as the polarization, the field strengths and the ionic radii of the different incorporated cations.

  10. Inflammatory root resorption in primary molars: prevalence and associated factors

    Scientific Electronic Library Online (English)

    Raquel Gonçalves, Vieira-Andrade; Clarissa Lopes, Drumond; Laura Pereira Azevedo, Alves; Leandro Silva, Marques; Maria Letícia, Ramos-Jorge.

    2012-08-01

    Full Text Available This study aimed at determining the prevalence of inflammatory root resorption and associated factors in 1068 primary mandibular molars in 453 children 3 to 12 years of age. Age, dental history and medical history were recorded using a questionnaire administered to the children's parents/caregivers. [...] Previously trained and calibrated examiners assessed radiographic images of the primary molars by direct observation, with the aid of a viewing box. Root resorption (physiological or inflammatory), dental crown status (healthy, carious with no pulp involvement, carious with pulp involvement and evidence of restoration), and pulpotomy or pulpectomy were determined. Data analysis involved descriptive statistics, the chi-square test and a multiple logistic regression (p

  11. Distalização dos molares superiores com aparelho Pendex: estudo cefalométrico prospectivo

    Scientific Electronic Library Online (English)

    Eduardo César Almada, Santos; Omar Gabriel da, Silva Filho; Patrícia Maria Pizzo, Reis; Francisco Antônio, Bertoz.

    Full Text Available A distalização dos molares superiores constitui um desafio na correção da má oclusão de Classe II em tratamentos sem extrações dentárias e sem avanço mandibular. Há uma procura por dispositivos que substituam a tração extrabucal (AEB) e que não exijam demasiada colaboração do paciente, o que estimul [...] a os ortodontistas a testarem métodos alternativos aos relatados na literatura. Dentre estes, destacam-se os aparelhos Pêndulo e Pendex de Hilgers. OBJETIVO: a realização desta pesquisa teve o intuito de avaliar, mediante a cefalometria, os efeitos do aparelho Pendex aplicado no final da dentadura mista e na dentadura permanente. METODOLOGIA: a amostra constou de 14 pacientes com má oclusão de Classe II bilateral, com média de idade de 11 anos e 3 meses. Foram tomadas duas telerradiografias em norma lateral, uma correspondente ao início do tratamento e outra aproximadamente 5 meses após sua finalização, quando a relação dos molares encontrava-se sobrecorrigida. RESULTADOS: após a determinação e mensuração das grandezas cefalométricas lineares e angulares e análise estatística (Teste t de Student), pode-se concluir que os efeitos do aparelho Pendex foram predominantemente ortodônticos: distalização da coroa dos primeiros molares permanentes numa velocidade média de 0,8 mm/mês e vestibularização dos incisivos superiores com aumento do trespasse horizontal. CONCLUSÃO: assim sendo, quando há indicação para distalização dos molares, cumpre-se fazer uma análise dos fatores envolvidos, a fim de eleger, com prudência, a solução terapêutica mais adequada às exigências individuais e profissionais. Abstract in english The upper molar distalization is a challenge in the Class II malocclusion correction in treatments without dental extraction and without mandibular advance. There is a search for appliances that replace the extrabuccal traction (AEB) and do not require patient cooperation, that stimulate the orthodo [...] ntists to test the alternative methods related in the literature. Among these, we see the Hilgers' Pendulum and Pend-X appliances. AIM: The realization of this research has the aim to evaluate, through the cephalometry, the effects of the Pend-X appliance applied in the end of the mixed dentition and in the permanent too. METHODS: The sample consisted of 14 patients with bilateral Class II malocclusion and with mean age of 11 years and 3 months old. Two teleradiographies were taken in the lateral norm, one was correspondent to the beginning of the treatment and the other one after approximately 5 months, when the molars relation were overcorrected. RESULTS: After the determination and measurement of angular and linear cephalometry quantities and the statistical analysis (Student's t tests) could one to conclude that the effects of the Pend-X appliance were predominantly dental: first molars crown distalization in a mean speed of 0.8mm/month and superior incisive vestibularization with overjet increase. CONCLUSION: So, when there is indication to molars distalization, we have to analyse the involved factors to elect, with prudence, the most adequated therapeutic solution with the individual and professional exigencies.

  12. Desplazamiento de un tercer molar superior al espacio facial bucal

    Directory of Open Access Journals (Sweden)

    Diana Araceli Dávila Hernández

    2013-01-01

    Full Text Available La exodoncia del tercer molar superior es uno de los procedimien- tos quirúrgicos más comunes que pueden cursar con complica- ciones tras y posoperatorias, mismas que suelen ser frecuentes, como: hemorragia, dolor, fracturas óseas, comunicación sinusal, lesiones vasculares y nerviosas; o excepcionales, como el des- plazamiento del órgano dental al espacio facial bucal, resultado de la aplicación de fuerzas excesivas y técnicas quirúrgicas incorrectas. Se comunica el caso clínico de una paciente de 35 años de edad con el diagnóstico de desplazamiento del tercer molar superior derecho al espacio facial bucal, así como la des- cripción de las características clínicas, auxiliares de diagnóstico y la técnica quirúrgica de enucleación. Actualmente la paciente se encuentra en recuperación.

  13. Evaluation in vitro of pulpal chamber temperature of deciduous teeth during Er:YAG laser application; Avaliacao in vitro da temperatura na camara pulpar de dentes deciduos durante aplicacao do laser de Er:YAG

    Energy Technology Data Exchange (ETDEWEB)

    Sznajder, Alexandre Joseph

    2001-07-01

    The Er:YAG laser technology has been thoroughly studied, since its invention, and has been increasingly recommended in Dentistry. However, its use in deciduous teeth has not been deserving the equivalent attention to its counterpart in permanent teeth, despite of the deciduous teething occur in a phase of life in which it has a far more importance than its substitutes. For that reason, this study aims to identify the suitable parameters to the clinic procedures in deciduous teeth, using the already established protocols in permanent teeth. The study was lead in a way to resemble the most the conditions of the clinical use of the laser. Five groups were analyzed using different energy densities and repetition rates. Each group was composed of 10 first superior right deciduous molars randomly selected. The energy densities and repetition rates used for each group were: 60 mJ 15 Hz, 250 mJ 2 Hz, 250 mJ 15 Hz, 400 mJ 6 Hz and 500 mJ 2 Hz. The results obtained allowed us to conclude that the use of the Er:YAG laser in Odontopediatrics is effective, safe and secure and the main reason for its recommendation is the low transfer of heat to the adjacent tissues of the applied surfaces. (author)

  14. 75 FR 9228 - Draft Guidance for Industry on Non-Inferiority Clinical Trials; Availability

    Science.gov (United States)

    2010-03-01

    ...DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration...on Non-Inferiority Clinical Trials; Availability AGENCY: Food...Non- Inferiority Clinical Trials.'' This draft guidance provides...Non-Inferiority Clinical Trials.'' The draft guidance...

  15. Relationship of third molar movement during orthodontic treatment and root angulation

    Directory of Open Access Journals (Sweden)

    Morteza Oshagh

    2012-01-01

    Conclusion: The relation between the amount of third molar movement and its root angulation was not statistically significant. Therefore movement of third molars during orthodontic treatment should not be assumed as an etiologic factor of root angulations.

  16. Inferior alveolar nerve sensitivity changes after mandibular trauma

    Directory of Open Access Journals (Sweden)

    Simonas Grybauskas

    2010-12-01

    Full Text Available The investigation was performed on 195 patients, who had fracture on mandibular angle zone. In control group pain thresholds of infraorbital nerve and inferior alveolar nerve did not differ significantly (p > 0.05. Consequently, lesion degree of inferior alveolar nerve and its functional recovery dynamics were estimated objectively according to pain threshold and lesion index of neural function. Stump dislocation extent has influence on neural lesion: the more expressed dislocation, the higher likelihood of severe lesion of inferior alveolar nerve. Three degrees of neural lesion were identified in the case of mandibular angle fracture. When minor lesion of inferior alveolar nerve took place (17.4%, sensation recovered in 21 days after stump reposition and fixation; moderate lesion of nerve (55.8% had sensory recovery after 28 days, and in the case of severe lesion of nerve (26.6% neural function did not recover even after 90 days.

  17. Maxillary first molar with two palatal roots: a case report

    Directory of Open Access Journals (Sweden)

    Salapoor M

    2010-12-01

    Full Text Available "n The goal of each root canal therapy is cleaning and obturating the entire root canal system. A thorough knowledge of root and root canal morphology and a good anticipation of their possible morphologic variations are essential and will help to reduce endodontic failure caused by incomplete root canal preparation and obturation. In this study, one case of maxillary molar with two palatal roots has been reported in a 40-year-old moman.

  18. Moxel: A molar tooth voxel model for dosimetric studies

    Energy Technology Data Exchange (ETDEWEB)

    Ferrari, P., E-mail: paolo.ferrari@enea.i [ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, ION-IRP, Radiation Protection Institute, 16 Via dei Colli, 40136 Bologna (Italy); Gualdrini, G. [ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, ION-IRP, Radiation Protection Institute, 16 Via dei Colli, 40136 Bologna (Italy); Fattibene, P. [Istituto Superiore di Sanita, Department of Technology and Health, Viale Regina Elena 299, I-00161 Roma (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Gruppo Collegato Sanita, Viale Regina Elena 299, I-00161 Roma (Italy); Veronese, I. [Universita degli Studi di Milano, Dipartimento di Fisica, Via Celoria 16, 20133 Milano (Italy); INFN, Sezione di Milano, Via Celoria 16, 20133 Milano (Italy)

    2010-02-15

    Stylized numerical models of the tooth are usually employed in qualification procedure related to Electronic Paramagnetic Resonance in long-term accidental contamination dose reconstruction. In this work a voxel model was developed from the microCT image data set of a human non contaminated molar tooth. A stylized model, reproducing the characteristics of the voxel model, was also created in order to investigate the level of accuracy that can be obtained in this kind of study.

  19. Patterning by heritage in mouse molar row development

    OpenAIRE

    Prochazka, Jan; Pantalacci, Sophie; Churava, Svatava; Rothova, Michaela; Lambert, Anne; Lesot, Hervé; Klein, Ophir; Peterka, Miroslav; Laudet, Vincent; Peterkova, Renata

    2010-01-01

    It is known from paleontology studies that two premolars have been lost during mouse evolution. During mouse mandible development, two bud-like structures transiently form that may represent rudimentary precursors of the lost premolars. However, the interpretation of these structures and their significance for mouse molar development are highly controversial because of a lack of molecular data. Here, we searched for typical tooth signaling centers in these two bud-like structures, and followe...

  20. The interplay of Graves’ disease and twin molar pregnancy

    OpenAIRE

    Barrera, Jerome Rebollos; Sandoval, Mark Anthony Santiago; Quiwa, Leslie Quizon; Paz-Pacheco, Elizabeth

    2013-01-01

    Twin molar pregnancy with coexistent viable fetus in a patient with Graves’ disease is a rare entity. The patient is a 37-year-old woman who was hospitalised owing to persistent vomiting and vaginal bleeding. The pregnancy test was positive and the pelvic ultrasound disclosed twin gestation of complete mole and a coexistent viable 12-week fetus. ?-Human chorionic gonadotropin (?-HCG) and free thyroid hormones were both elevated. The patient was also a diagnosed case of Graves’ disease prior t...

  1. Directional and fluctuating asymmetries in Cavall Pirinenc Català breed molars

    OpenAIRE

    Parés Casanova, Pere-Miquel; Reig, Eduard

    2015-01-01

    Deviations from expected perfect symmetry in biological forms can occur, and organisms develop several kinds of asymmetries. Among others, there are fluctuating asymmetry (FA) and directional asymmetry (DA). Thirty-two complete skulls were obtained from horses belonging to the"Cavall Pirinenc Català" breed and the mesiodistal and the palatinovestibular lengths of the right and left upper molar series were analyzed in order to study FA and DA. Neither FA nor DA were detected in the studied sam...

  2. Bilateral Taurodontism in Deciduous Molars: A case Report

    Directory of Open Access Journals (Sweden)

    Parimala Tyagi,

    2010-01-01

    Full Text Available Taurodontism is a rare dental anomaly in which the involved tooth has an enlarged and elongated body and pulpchamber with apical displacement of the pulpal floor. It has a very low incidence and very few cases are reported inliterature in deciduous dentition. Endodontic treatment of a taurodont tooth is challenging and requires special handlingbecause of the proximity and apical displacement of the roots. In this article a case of five year child with bilateralinvolvement of mandibular second molars is presented.

  3. Presence of third molars in orthodontic patients from northern Greece

    OpenAIRE

    Barka G; Tretiakov G; Theodosiou T; Ioannidou-Marathiotou I

    2012-01-01

    Georgia Barka,1 Georgios Tretiakov,1 Theodosios Theodosiou,2 Ioulia Ioannidou-Marathiotou31School of Dentistry, 2Biostatistics, Department of Informatics, School of Natural Sciences, 3Department of Orthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, GreeceObjective: The purpose of the present study was to investigate the frequency of presence of third molar teeth and their distribution in each jaw and each side, according to sex, in a group of orthodontic pa...

  4. Fibroblast cell proliferation in the mouse molar periodontal ligament.

    OpenAIRE

    Perera, K A; Tonge, C. H.

    1981-01-01

    Cytogenesis of the developing molar periodontal ligament was studied by determining labelling indices in 4 groups of young mice. Autoradiographs were made using paraffin sections of demineralised specimens from 10 days, 12 days, 16 days and 20 days old mice allowed to survive a varying period (1--96 hours) after the administration of [3H]thymidine. Labelled fibroblasts in number per unit area were counted over three different zones (apical, middle and cervical) of the sections and labelling i...

  5. Joubert syndrome: congenital cerebellar ataxia with the “molar tooth”

    OpenAIRE

    Romani, Marta; Micalizzi, Alessia; Valente, Enza Maria

    2013-01-01

    Joubert syndrome (JS) is a congenital cerebellar ataxia with autosomal recessive or X-linked inheritance, which diagnostic hallmark is a unique cerebellar and brainstem malformation recognizable on brain imaging, the “molar tooth sign”. Neurological signs are present from neonatal age and include hypotonia evolving into ataxia, global developmental delay, ocular motor apraxia and breathing dysregulation. These are variably associated with multiorgan involvement, mainly of the retina, kidneys,...

  6. Cusp development in the mouse first lower molar.

    Czech Academy of Sciences Publication Activity Database

    Viriot, L.; Lesot, H.; Peterka, Miroslav; Peterková, Renata

    2007-01-01

    Ro?. 14, Supplement 2 (2007), s. 8-8. ISSN 1473-2262. [International Conference on Tooth Morphogenesis and Differentiation /9./. 04.09.2007-08.09.2007, Zürich] R&D Projects: GA MŠk OC B23.002; GA ?R GA304/05/2665 Institutional research plan: CEZ:AV0Z50390512 Keywords : Molar Subject RIV: EB - Genetics ; Molecular Biology

  7. Management of a hopeless mandibular molar: A case report

    OpenAIRE

    saeed asgary

    2011-01-01

    Intentional tooth reimplantation can be an alternative treatment option for teeth with poor or hopeless prognosis where coronal and surgical endodontic treatment(s) are not possible. This technique may help to restore a natural tooth to function in preference to prosthesis/implant replacements. A 38-years old male was referred to private practice with persistent chronic apical periodontitis of a previously root canal treated mandibular left first molar. A furcal perforation and distolingual c...

  8. Formation and development of maxillary first molars with delayed eruption.

    Science.gov (United States)

    Sano, Natsuki; Kameda, Takashi; Terashima, Yukari; Batbayar, Nomintsetseg; Terada, Kazuto

    2015-09-01

    Cases of congenitally missing and delayed eruption of the maxillary first molar are rare. However, in recent years, we have experienced cases of suspected delayed eruption of or congenitally missing first molars. The purpose of this study was to analyze the formation of delayed erupted maxillary first molars (M1) (>2 standard deviations), which play important roles in occlusion, and normal eruption of the maxillary first molars (U6). The frequency of M1 among patients born between 1974 and 1994 in one institution with a clear total patient number and personal oral histories was 1.55 % [80 % bilateral eruption in 8 of 806 male patients (0.99 %) and 23 of 1195 female patients (1.92 %)]. To evaluate the formation and eruption of M1 according to Moorrees's tooth formation stages, panoramic X-ray films were obtained every year for 73 patients with M1 from 3 institutions (20 male and 53 female patients, total 131 M1s) without systematic histories or genetic disorders. The development/growth curve of M1 was fitted to both the logistic curve and U6 curve. The M1 development/growth curve was started behind with U6 curve; however, the straight part of the M1 curve exhibited steep inclination compared with the straight part of the U6 curve. The curve of the eruption pathway of M1 also exhibited a sigmoid S shape. These results indicate that the development and migration speed of M1 are faster than that of U6, excluding the delayed start point. These results may help orthodontists in treatment planning for patients with M1. PMID:25011634

  9. Mudanças na apresentação clínica da gravidez molar The changing clinical presentation of molar pregnancy

    Directory of Open Access Journals (Sweden)

    Paulo Belfort

    2004-07-01

    Full Text Available OBJETIVO: determinar se a apresentação clínica da mola hidatiforme tem mudado nos últimos anos (1992-1998 quando comparada a registros históricos de controle (1960-1981. MÉTODOS: foram revisadas 80 fichas de pacientes com mola hidatiforme acompanhadas entre 1960-1981 no Centro de Neoplasia Trofoblástica Gestacional da Santa Casa da Misericórdia (Rio de Janeiro Brasil e as de 801 pacientes atendidas entre 1992-1998 no mesmo centro. Foram analisados os seguintes parâmetros: idade, número de gestações, sangramento vaginal, hiperêmese, edema dos membros inferiores, hipertensão arterial, útero grande para a idade gestacional e cistos teca-luteínicos dos ovários. Para análise estatística foram utilizados os testes do qui-quadrado e o cálculo do odds ratio (OR com intervalo de confiança (IC de 95%. RESULTADOS: com relação à idade, a ocorrência de mola em pacientes com menos de 15 anos ou mais de 40 foi significativamente mais freqüente no grupo II do que no grupo I; quanto ao número de gestações, a diferença entre os dois grupos só não foi significativa entre aquelas pacientes que gestavam pela terceira e quarta vez. A hipertensão arterial, foi detectada em porcentagem semelhante nos dois grupos e útero grande para a idade gestacional foi mais freqüente no grupo II (41,4 vs 31,2% - p OBJECTIVE: to determine whether the clinical presentation of hydatidiform mole has changed in the recent years (1992-1998 when compared with historic controls (1960-1981. METHODS: medical records of 80 patients with hydatidiform mole attended in the 1960-1981 period (Group I were reviewed and compared to data from 801 patients followed in the 1992-1998 period (Group II. The clinical signals and symptoms analyzed were: age distribution, number of pregnancies, vaginal bleeding, hyperemesis, edema, hypertension, large uterus for gestation date and theca lutein cysts of the ovaries. Statistical analyses employed chi-square tests and odds ratio (OR estimate with the confidence interval (CI of 95%. RESULTS: concerning age, the disease occurred more frequently in group II than in group I, in patients under 15 and over 40 years old. As to the number of pregnancies, there was no statistical difference only in those patients who were in their third or fourth pregnancies. Arterial hypertension was the only symptom that occurred with similar frequency in both groups. Enlarged uterus was more frequent in group II (41.4 X 31.2% - p <0.05; OR: 1.5; IC: 1.0-2.3. Bleeding remained the most common symptom, occurring in 76.9% of patients (Group II, although it has occurred in 98.7% of the historic controls (p<0.05; OR: 0.04; IC: 0.03 0.04. The following symptoms were also less frequent in group II as compared to group I: hyperemesis (36.5% X 45% - p<0.05; OR: 0.7; IC: 0.4 0.9, edema (12.7% X 20% - p<0.05, OR: 0.5, IC: 0.3 0.8, enlarged uterus for gestational age (41.4% x 31.2% - p<0.05; OR: 1.5; IC: 1.0 2.3 and theca lutein cysts (16.4% X 41.2% - p<0.05; OR: 0.3; IC: 0.2 0.4. Ultrasound has become the commonest method of diagnosis (89.2% - p<0.05, allowing early detection of hydatidiform moles. CONCLUSION: there was a decrease of the traditional symptoms in current patients with hydatidiform mole as compared to historic controls, due to early diagnosis through ultrasonography.

  10. 3-D diagnosis-assisted management of anomalous mandibular molar

    Directory of Open Access Journals (Sweden)

    Neelam Mittal

    2012-01-01

    Full Text Available This case report describes the successful non-surgical endodontic management of carious exposed three-rooted mandibular molar with four root canals detected on the pre-operative radiograph taken with 20 degrees mesial angulation and confirmed with a 64-slice helical computed tomography scan-assisted 3-D-reconstructed images. Access cavity shape was modified to locate the extra canal with respect to the distolingual root in the left mandibular first molar. Copious irrigation was accomplished with 5.25% sodium hypochlorite and 17% EDTA. Biomechanical preparation was done using protapers. Calcium hydroxide dressing was done for 1 week. The tooth was obturated using gutta percha and AH 26 root canal sealer, and it was permanently restored with composite. Clinical examination on follow-up visits revealed no sensitivity to percussion and palpation in the left mandibular first molar. Thorough knowledge of root canal variations and use of advanced diagnostic modalities lead to successful non-surgical management of the complex cases.

  11. Determination of partial molar volumes from free energy perturbation theory.

    Science.gov (United States)

    Vilseck, Jonah Z; Tirado-Rives, Julian; Jorgensen, William L

    2015-04-01

    Partial molar volume is an important thermodynamic property that gives insights into molecular size and intermolecular interactions in solution. Theoretical frameworks for determining the partial molar volume (V°) of a solvated molecule generally apply Scaled Particle Theory or Kirkwood-Buff theory. With the current abilities to perform long molecular dynamics and Monte Carlo simulations, more direct methods are gaining popularity, such as computing V° directly as the difference in computed volume from two simulations, one with a solute present and another without. Thermodynamically, V° can also be determined as the pressure derivative of the free energy of solvation in the limit of infinite dilution. Both approaches are considered herein with the use of free energy perturbation (FEP) calculations to compute the necessary free energies of solvation at elevated pressures. Absolute and relative partial molar volumes are computed for benzene and benzene derivatives using the OPLS-AA force field. The mean unsigned error for all molecules is 2.8 cm(3) mol(-1). The present methodology should find use in many contexts such as the development and testing of force fields for use in computer simulations of organic and biomolecular systems, as a complement to related experimental studies, and to develop a deeper understanding of solute-solvent interactions. PMID:25589343

  12. Identification of Apical and Cervical Curvature Radius of Human Molars.

    Science.gov (United States)

    Estrela, Carlos; Bueno, Mike R; Barletta, Fernando B; Guedes, Orlando A; Porto, Olavo C; Estrela, Cyntia R A; Pécora, Jesus Djalma

    2015-08-01

    To determine the frequency of apical and cervical curvatures in human molars using the radius method and cone-beam computed tomography (CBCT) images. Four hundred images of mandibular and maxillary first and second molars were selected from a database of CBCT exams. The radius of curvature of curved root canals was measured using a circumcenter based on three mathematical points. Radii were classified according to the following scores: 0 - straight line; 1 - large radius (r>8 mm, mild curvature); 2 - intermediate radius (r>4 and r<8 mm, moderate curvature); and 3 - small radius (r?4 mm, severe curvature). The frequency of curved root canals was analyzed according to root canal, root thirds, and coronal and sagittal planes, and assessed using the chi-square test (significance at ?=0.05). Of the 1,200 evaluated root canals, 92.75% presented curved root canals in the apical third and 73.25% in the cervical third on coronal plane images; sagittal plane analysis yielded 89.75% of curved canals in the apical third and 77% in the cervical third. Root canals with a large radius were significantly more frequent when compared with the other categories, regardless of root third or plane. Most root canals of maxillary and mandibular first and second molars showed some degree of curvature in the apical and cervical thirds, regardless of the analyzed plane (coronal or sagittal). PMID:26312971

  13. Troubleshooting OptEase inferior vena cava filter retrieval.

    Science.gov (United States)

    Nakashima, Masaya; Kobayashi, Hideaki; Kobayashi, Masayoshi

    2016-01-01

    For treatment of deep vein thrombosis and prevention of pulmonary thromboembolism, a retrievable inferior vena cava filter is commonly utilized as an effective bridge to anticoagulation. However, we have experienced difficulties in retrieving inferior vena cava filters. Endovascular retrieval assisted by disposable biopsy forceps is an appropriate approach because it provides a less-invasive low-cost way to remove a migrated filter. We suggest this troubleshooting technique to deal with filter hook migration into the caval wall. PMID:24828829

  14. Inferior alveolar nerve sensitivity changes after mandibular trauma

    OpenAIRE

    Simonas Grybauskas; Algirdas Lukosiunas; Gintautas Sabalys; Ricardas Kubilius; Dainius Razukevicius

    2010-01-01

    The investigation was performed on 195 patients, who had fracture on mandibular angle zone. In control group pain thresholds of infraorbital nerve and inferior alveolar nerve did not differ significantly (p > 0.05). Consequently, lesion degree of inferior alveolar nerve and its functional recovery dynamics were estimated objectively according to pain threshold and lesion index of neural function. Stump dislocation extent has influence on neural lesion: the more expressed dislocation, the high...

  15. Opioid modulation of GABA release in the rat inferior colliculus

    Directory of Open Access Journals (Sweden)

    Forge Andrew

    2004-09-01

    Full Text Available Abstract Background The inferior colliculus, which receives almost all ascending and descending auditory signals, plays a crucial role in the processing of auditory information. While the majority of the recorded activities in the inferior colliculus are attributed to GABAergic and glutamatergic signalling, other neurotransmitter systems are expressed in this brain area including opiate peptides and their receptors which may play a modulatory role in neuronal communication. Results Using a perfusion protocol we demonstrate that morphine can inhibit KCl-induced release of [3H]GABA from rat inferior colliculus slices. DAMGO ([D-Ala(2, N-Me-Phe(4, Gly(5-ol]-enkephalin but not DADLE ([D-Ala2, D-Leu5]-enkephalin or U69593 has the same effect as morphine indicating that ? rather than ? or ? opioid receptors mediate this action. [3H]GABA release was diminished by 16%, and this was not altered by the protein kinase C inhibitor bisindolylmaleimide I. Immunostaining of inferior colliculus cryosections shows extensive staining for glutamic acid decarboxylase, more limited staining for ? opiate receptors and relatively few neurons co-stained for both proteins. Conclusion The results suggest that ?-opioid receptor ligands can modify neurotransmitter release in a sub population of GABAergic neurons of the inferior colliculus. This could have important physiological implications in the processing of hearing information and/or other functions attributed to the inferior colliculus such as audiogenic seizures and aversive behaviour.

  16. Molar Mass and Second Virial Coefficient of Polyethylene Glycol by Vapor Pressure Osmometry

    Science.gov (United States)

    Schwinefus, Jeffrey J.; Checkal, Caleb; Saksa, Brian; Baka, Nadia; Modi, Kalpit; Rivera, Carlos

    2015-01-01

    In this laboratory experiment, students determine the number-average molar masses and second virial coefficients of polyethylene glycol (PEG) polymers ranging in molar mass from 200 to 1500 g mol[superscript -1] using vapor pressure osmometry (VPO). Students assess VPO in relation to accurate molar mass calculations of PEG polymers. Additionally,…

  17. Audit of a 5-year radiographic protocol for assessment of mandibular third molars before surgical intervention

    DEFF Research Database (Denmark)

    Matzen, L H; Schou, SØren

    2014-01-01

    OBJECTIVES: To perform an audit of a three-step protocol for radiographic examination of mandibular third molars before surgery. METHODS: 1769 teeth underwent surgery. A standardized three-step radiographic protocol was followed: (1) panoramic imaging (PAN), (2) stereoscanography (SCAN) and (3) CBCT. If there was overprojection between the tooth and the canal in PAN, SCAN was performed. If the tooth was determined to be in close contact with the canal in SCAN, CBCT was performed. Close contact between the tooth and the canal was assessed in all images, and patient-reported sensory disturbances from the alveolar inferior nerve were recorded after surgery. The relation between the final radiographic examination and sensory disturbances was determined. Logistic regression analysis tested whether signs for a close contact in PAN/SCAN could predict no bony separation between the tooth and canal in CBCT. RESULTS: 46% of teeth underwent PAN, 31% underwent SCAN and 23% underwent CBCT as the final examination. 21% underwent all three radiographic examinations. 53/76% of teeth with close relation to the canal in PAN/SCAN showed no bony separation in CBCT; if there was close relation in PAN/SCAN, there was 1.6/4.3 times higher probability that no bony separation existed in CBCT. 16 cases of sensory disturbances were recorded: 4 operations were based on PAN, 8 on SCAN and 4 on CBCT. CONCLUSIONS: The radiographic protocol was in general followed. SCAN was superior to PAN in predicting no bony separation between the tooth and the canal in CBCT, and there was no relation between sensory disturbances and radiographic method.

  18. Comparison of conduction abnormalities between anterior and inferior myocardial infarction

    International Nuclear Information System (INIS)

    To compare the conduction abnormalities between anterior and inferior myocardial infarction. Methodology: Study was conducted from 1st January 2011 to 30th June 2011 in Cardiology Department Lady Reading Hospital Peshawar. Patients who presented with acute Myocardial infarction were included in the study. Patients having renal failure, Hypokalemia, Hyperkalemia, history of valve replacement, coronary artery bypass graft and those who were using Beta blocker,Lanoxin and Calcium channel blocker (Verapamil,Diltiazem) were excluded from the study. Results: A total of 600 patients were studied. Out of these 309 had acute Anterior Myocardial Infarction and remaining had acute Inferior Myocardial Infarction. The number of male patients were 70%. Mean age was 58.8 years. Conduction abnormalities were demonstrated in 12.16% patients. Amongst patients with Ant MI,3.5% patients developed atrioventricular blocks and 7.1% Intraventricular conduction defects, In inferior MI 11.3% were atrioventricular and 2.4% were Intraventricular conduction defects. There were more intraventricular defects in anterior MI while atrioventricular defects were more common in inferior MI. Conclusion: Conduction abnormalities are common findings in acute myocardial infarction. Intraventricular conduction abnormalities are more common in anterior MI and atrioventricular conduction abnormalities are more common in inferior MI. (author)

  19. STUDY ON VARIATIONS OF INFERIOR SEGMENTAL BRANCH OF RENAL ARTERY

    Directory of Open Access Journals (Sweden)

    Chandragirish S

    2014-11-01

    Full Text Available Background: The segmental arteries of the kidney supply the organ in such a way that, each renal pole receives its own artery while, the anterior portion between the poles is supplied by an upper and lower segmental vessel. These two arteries also include in their territory the lateral edge of the kidney and adjacent to the strip of parenchyma on the dorsal or posterior aspect of the organ. The knowledge of inferior segmental branch of renal artery is very important for surgeries in its distribution area in kidney. Materials and Methods: 100 kidneys (Fifty pairs intact with abdominal aorta were collected from department of Forensic medicine, JSS Medical College and Mysore Medical College. For study of segmental variation Corrosion cast technique method was used. The variations of inferior segmental branch of renal artery were observed and recorded. Results: In present study type I inferior segmental branch of renal artery were found in - 59% cases, type II in - 6% cases, type III in - 28% cases, type IV in - 2% cases. Conclusion: The inferior segmental artery from the anterior division of the renal artery is the commonest event –arising in 59%. This is Type I, the normal type. It arises from the renal artery (28% or from the posterior division (6% or from the aorta (2%. The knowledge of inferior segmental branch of renal artery helpful in kidney transplantation and renal surgery because these type of surgeries success mainly depends on arterial ligations.

  20. Somatotopic representation in inferior area 6 of the macaque monkey.

    Science.gov (United States)

    Gentilucci, M; Fogassi, L; Luppino, G; Matelli, M; Camarda, R; Rizzolatti, G

    1989-01-01

    On the basis of its cytoarchitectonic and enzymatic properties area 6 of the macaque monkey can be subdivided into two large sectors: a superior sector lying medial to the spur of the arcuate sulcus (superior area 6 or F2) and an inferior sector lying lateral to it (inferior area 6). Inferior area 6 is constituted by two enzymatic areas: F4 and F5. In this study we investigated the somatotopic organization of inferior area 6 and the adjacent area 4 combining single-neuron recording and intracortical electrical microstimulation. We found that two separate movement representations exist in this region. The caudal one corresponds to area F1 (primary motor cortex), the rostral one to inferior area 6. The two representations are mirror images one of the other with the axioproximal movements being adjacently located. In the rostral map the proximal movements are mostly located in F4, the distal movements in F5. Neuronal properties indicate that the rostral map has characteristics that are more complex than the caudal map. We propose that the rostral map is involved in transforming visual information in motor commands. F4 should be involved in the control of arm movements based on the location of the objects in respect to the body, whereas F5 should play a role in the control of grasping movements on the basis of the size of the stimuli. PMID:2758288

  1. The effects of inferior olive lesion on strychnine seizure

    International Nuclear Information System (INIS)

    Bilateral inferior olive lesions, produced by systemic administration of the neurotoxin 3-acetylpyridine (3AP) produce a proconvulsant state specific for strychnine-induced seizures and myoclonus. We have proposed that these phenomena are mediated through increased excitation of cerebellar Purkinje cells, through activation of glutamate receptors, in response to climbing fiber deafferentation. An increase in quisqualic acid (QA)-displaceable [3H]AMPA [(RS)-alpha-amino-3-hydroxy-5-methyl-isoxazole-4-propionic acid] binding in cerebella from inferior olive-lesioned rats was observed, but no difference in [3H]AMPA binding displaced by glutamate, kainic acid (KA) or glutamate diethylester (GDEE) was seen. The excitatory amino acid antagonists GDEE and MK-801 [(+)-5-methyl-10,11-dihydro-5H-dibenzo[a,d]cyclo-hepten-5,10 imine] were tested as anticonvulsants for strychnine-induced seizures in 3AP inferior olive-lesioned and control rats. Neither drug effected seizures in control rats, however, both GDEE and MK-801 produced a leftward shift in the strychnine-seizure dose-response curve in 3AP inferior olive-lesioned rats. GDEE also inhibited strychnine-induced myoclonus in the lesioned group, while MK-801 had no effect on myoclonus. The decreased threshold for strychnine-induced seizures and myoclonus in the 3AP-inferior olive-lesioned rats may be due to an increase in glutamate receptors as suggested by the [3H]AMPA binding data

  2. Removal of an Upper Third Molar from the Maxillary Sinus

    OpenAIRE

    Amorim, Klinger de Souza; da Silva, Vanessa Tavares; da Cunha, Rafael Soares; Souto, Maria Luisa Silveira; São Mateus, Carla Rocha; Souza, Liane Maciel de Almeida

    2015-01-01

    The maxillary sinus or antrum is the largest of the paranasal sinuses. It is located in the maxillary bone and has a proximity to the apexes of upper molars and premolars, which allows it to form a direct link between the sinus and the oral cavity. Dislocation of a foreign body or tooth to the interior of a paranasal sinus is a situation that can occur as a result of car accidents, firearm attacks, or iatrogenic in surgical procedures. Therefore, it is necessary to know how to treat this kind...

  3. Adenomatoid odontogenic tumor associated with unerupted first primary molar.

    Science.gov (United States)

    Lee, Jae-Seo; Yoon, Suk-Ja; Kang, Byung-Cheol; Kim, Ok-Jun; Kim, Young-Hee

    2012-01-01

    Adenomatoid odontogenic tumors (AOTs) are an uncommon benign odontogenic tumor. Both central and peripheral forms occur. Radiographically, the central variants are comprised of a follicular type (those associated with the crown of an embedded tooth) and an extrafollicular type (those with no embedded tooth). A review of the literature showed that only 3 cases of an association between AOT and unerupted primary teeth have been published. The purpose of this paper was to report a rare case of adenomatoid odontogenic tumor associated with an unerupted primary first molar in a 7-year-old boy. PMID:23265168

  4. Anterior ST segment depression in acute inferior myocardial infarction as a marker of greater inferior, apical, and posterolateral damage

    International Nuclear Information System (INIS)

    The clinical significance of anterior precordial ST segment depression during acute inferior myocardial infarction was evaluated in 67 consecutive patients early after onset of symptoms with gated blood pool scans, thallium-201 perfusion images, and 12-lead ECGs. Patients with anterior ST depression (n = 33) had depressed mean values for left ventricular ejection fraction (54 +/- 2% [mean +/- S.E.M.] vs 59 +/- 2%; p = 0.02), cardiac index (3.1 +/- 0.2 vs 3.6 +/- 0.2 L/m2; p = 0.03), and ratio of systolic blood pressure to end-systolic volume (2.0 +/- 0.1 vs 2.5 +/- 0.3 mm Hg/ml; p = 0.04) compared to patients with no anterior ST depression (n = 34). Patients with anterior ST depression had (1) lower mean wall motion values for the inferior, apical, and inferior posterolateral segments (p less than 0.05) and (2) greater reductions in thallium-201 uptake in the inferior and posterolateral regions (p less than 0.05). However, anterior and septal (1) wall motion and (2) thallium-201 uptake were similar in patients with and without ST depression. Thus, anterior precordial ST segment depression in patients with acute inferior wall myocardial infarction represents more than a reciprocal electrical phenomenon. It identifies patients with more severe wall motion impairment and greater hypoperfusion of the inferior and adjacent segments. The poorer global left ventricular function in these patients is a result of more extensive inferior infarction and not of remote septal or anterior injury

  5. Image analysis of the eruptive positions of third molars and adjacent second molars as indicators of age evaluation in Thai patients

    Energy Technology Data Exchange (ETDEWEB)

    Mahasantipiya, Phattaranant May; Pramojanee, Sakarat; Thaiupathump, Trasapong [Chiang Mai University, Chiang Mai (Thailand)

    2013-12-15

    This study was performed to determine the relationship between the stage of tooth eruption (both vertical and mesio-angular) and chronological age. Indirect digital panoramic radiographs were used to measure the distances from the dentinoenamel junction (DEJ) of the second molars to the occlusal plane of the second molar teeth and of the adjacent third molars in 264 Thai males and 437 Thai females using ImageJ software. The ratio of those distances was calculated by patient age, and the correlation coefficient of the ratio of the third molar length to the second molar length was calculated. The correlation between the height of the vertically erupted upper third molar teeth and age was at the intermediate level. The age range of ?15 to <16 years was noted to be the range in which the correlation between the chronological age determined from the eruptional height and actual chronological age was statistically significant. The mean age of the female subjects, in which the position of the right upper third molar teeth was at or above the DEJ of the adjacent second molar but below one half of its coronal height was 19.9±2.6 years. That for the left side was 20.2±2.7 years. The mean ages of the male subjects were 20.1±3.3 years and 19.8±2.7 years for the right and left sides, respectively. It might be possible to predict chronological age from the eruption height of the wisdom teeth.

  6. Cerebelo y tracto urinario inferior / Cerebellum and lower urinary tract

    Scientific Electronic Library Online (English)

    Jesús María, Díez Rodríguez; Jesús, Salinas Casado; Antonio, Mañas Pelillo; Miguel, Mora Durbán; Javier, Navarro Sebastián; Mariano, Arrizabalaga Moreno.

    2005-06-01

    Full Text Available OBJETIVO: Revisar el papel del cerebelo en la dinámica del tracto urinario inferior. MÉTODO: Metodología anatomofuncional que incluye estudio estructural, funcional y de neurotransmisores. RESULTADOS: Se describen las complejas conexiones del cerebelo y su influencia sobre la función del tracto urin [...] ario inferior. CONCLUSIONES: Es sorprendente la interrelación funcional entre cerebelo y tracto urinario inferior, ejerciendo un papel modulador inhibitorio durante la fase de llenado y facilitador durante la fase de vaciado. Abstract in english OBJECTIVES: To review the role of cerebellum on the lower urinary tract dynamics. METHODS: Anatomic-functional methodology including structural, functional and neurotransmitters study. RESULTS: We describe the complex connections of the cerebellum and its influence on the lower urinary tract functio [...] n. CONCLUSIONS: It is surprising the functional relationship between cerebellum and lower urinary tract, playing a inhibitory modulating role during the filling phase and facilitating the voiding phase.

  7. Estudio inmunocitoquímico y molecular de cultivo primario de tejido molar / Immunocytochemical and molecular studies with primary cultures of molar tissue

    Scientific Electronic Library Online (English)

    Yinth Andrea, Bernal; Luis Eduardo, Díaz; Jinneth, Acosta; Cecilia, Crane; Stella, Carrasco-Rodríguez; Antonio José, Bermúdez; Myriam, Sánchez-Gómez.

    2006-12-01

    Full Text Available Introducción. La enfermedad trofoblástica gestacional comprende un conjunto de patologías caracterizadas por crecimiento e invasión anómalos del trofoblasto. Las bases moleculares de esta patología son desconocidas, en parte por la dificultad para disponer de modelos biológicos adecuados. Se plantea [...] que el sistema de factores de crecimiento similares a la insulina puede tener un papel fundamental en el desarrollo de la enfermedad. Objetivo. Caracterizar cultivos primarios de placentas de primer trimestre provenientes de pacientes con mola hidatidiforme completa y aborto espontáneo no molar mediante morfología, inmunocitoquímica y expresión diferencial de algunos genes del sistema de factores de crecimiento similares a la insulina. Materiales y métodos. Se empleó inmunocitoquímica para determinar células trofoblásticas y detección por transcripción reversa y reacción en cadena de la polimerasa de genes del sistema de factores de crecimiento similares a la insulina asociados al tipo celular. Resultados. La morfología evidenció heterogeneidad de los cultivos, incluidas células mesenquimales, trofoblásticas y de decidua. El contenido de células de trofoblasto con citoqueratina-7 (marcador específico) estuvo entre 16 y 37%. La expresión de genes corroboró la presencia de trofoblasto por medio del ARNm del factor II de crecimiento similar a la insulina, en tanto que los transcritos de la hormona de crecimiento variante evidenciaron la presencia de sincitiotrofoblasto. El factor I de crecimiento similar a la insulina y la proteína de unión tipo 1 se relacionaron con células mesenquimales y de decidua. Se observó una mayor expresión del factor II de crecimiento similar a la insulina en tejidos molares en comparación con aborto no molar. Conclusiones. Los resultados mostraron la utilidad de combinar tres metodologías, morfología, inmunocitoquímica y expresión de genes, como herramientas para la caracterización y seguimiento de cultivos placentarios a partir de muestras de tejidos anómalos complejos, facilitando así el diagnóstico. Abstract in english Introduction. Gestational trophoblastic disease includes a group of pathologies characterized by abnormal trophoblast growth and invasion. The molecular bases of the disease are largely unknown, due in part to the lack of appropriate biological models. The insulin-like growth factor (IGF) system pla [...] ys a fundamental role in the growth and development of many tissues and is involved in the progression of several diseases. Objectives. Primary cell cultures derived from first trimester placenta were characterized from patients with complete hydatidiform mole and spontaneous non molar abortion by immunocytochemical and molecular methods. Materials and Methods. The immunocytochemical method used specific markers for trophoblastic cells, whereas RT-PCR was used to identify insulin-like growth factor gene expression. Results. Histochemical staining with hematoxilin-eosin revealed that the cultures contained heterogeneous cell types, including trophoblast and endometrial decidual cells. The ratio of trophoblast cells in the cultures varied between 16% and 37%, as detected by cytokeratine-7 as the specific trophoblast marker. Gene expression analysis corroborated the presence of trophoblasts by detecting insulin-like growth factor II mRNA, whereas GH-V transcripts were correlated with the presence of syncitiotrophoblasts. Insulin-like growth factor I and insulin-like growth factor binding protein 1 mRNAs were related to mesenchyimal and decidual cells, respectively. Higher insulin-like growth factor II expression levels were found in molar tissues in comparison with non-molar abortions. Conclusion. By combining three methodologies-morphology, immunocytochemistry and gene expression, characterization and follow-up of placenta cultures from abnormal tissues is found to facilitate diagnosis.

  8. Enamel thickness trends in Plio-Pleistocene hominin mandibular molars.

    Science.gov (United States)

    Skinner, Matthew M; Alemseged, Zeresenay; Gaunitz, Charleen; Hublin, Jean-Jacques

    2015-08-01

    Enamel thickness continues to be an important morphological character in hominin systematics and is frequently invoked in dietary reconstructions of Plio-Pleistocene hominin taxa. However, to date, the majority of published data on molar enamel thickness of Pliocene and early Pleistocene hominins derive from naturally fractured random surfaces of a small number of specimens. In this study we systematically analyze enamel thickness in a large sample of Plio-Pleistocene fossil hominins (n = 99), extant hominoids (n = 57), and modern humans (n = 30). Based on analysis of 2D mesial planes of section derived from microtomography, we examine both average and relative enamel thickness, and the distribution of enamel across buccal, occlusal, and lingual components of mandibular molars. Our results confirm the trend of increasing enamel thickness during the Pliocene that culminates in the thick enamel of the robust Australopithecus species, and then decreases from early Homo to recent modern humans. All hominin taxa share a regional average enamel thickness pattern of thick occlusal enamel and greater buccal than lingual enamel thickness. Pan is unique in exhibiting the thinnest average enamel thickness in the occlusal basin. Statistical analysis indicates that among Pliocene hominins enamel thickness is a weak taxonomic discriminator. The data underlying these results are included in a table in the Supplementary Online Material. PMID:26024565

  9. Differential Expression of p63 in Hydropic and Molar Gestations

    International Nuclear Information System (INIS)

    Objective:To observe the differential expression of p63 in hydropic and molar gestation. Study Design: Cross-sectional analytical study. Place and Duration of Study: Department of Pathology, Basic Medical Sciences Institute, Jinnah Postgraduate and Medical Centre, Karachi, from January 2006 to June 2013. Methodology: Ninety placental biopsies including 30 cases each of hydropic abortions, partial hydatidiform mole and complete hydatidiform mole were analyzed for morphological features and results of immunohistochemical staining. Results were described as frequency. Significance was determined using test of proportions with significance at p < 0.05. Results: Out of 30 cases of hydropic abortion, 6 were negative, 15 were weak, 4 were moderate and 5 showed strong degree of intensity for p63. Out of 30 cases of partial hydatidiform mole, 3 were negative, 2 showed weak, 4 showed moderate and 21 cases showed strong degree of intensity for p63. All 30 cases of complete hydatidiform mole strongly stained for p63. Conclusion: The intensity of staining of p63 was stronger in cases of molar pregnancy as compared to hydropic abortion. There was loss of p63 expression in cytotrophoblastic cells in all abortions. In limited resources settings, where facilities for PCR/FISH and DNA ploidy analysis is not available, the authors advocate p63 in routine clinical practice to provide the most refined diagnosis of hydatidiform moles. (author)

  10. Embarazo ectópico molar tubárico: a propósito de un caso clínico

    Scientific Electronic Library Online (English)

    Encarnación, Arévalo Reyes; Amelia, Vizcaíno Martínez; María Luisa, Vizoso Pérez; Rafael Enrique, Sotelo Avilés.

    Full Text Available Introducción: La incidencia de gestación ectópica es 20/1000 embarazos. La mola hidatiforme ocurre en 1/1000 embarazos. Los casos de mola hidatiforme en embarazos ectópicos albergados en las trompas de Falopio constatados en la literatura mundial son excepcionales. Objetivo: Presentamos un caso clín [...] ico de embarazo ectópico molar tubárico y revisión de la literatura. Conclusión: La enfermedad trofoblástica gestacional asociada a embarazo ectópico es un entidad extremadamente rara que debe tenerse en cuenta por su trascendencia. Abstract in english Introduction: The incidence of ectopic pregnancy is 20/1000 pregnancies. The hidatidyform mole occurs in about 1/1000 pregnancies. The cases of hidatidyform mole in ectopic pregnancies located in the Fallopian tube collected in world literature are exceptional. Objective: We present a clinical case [...] of an ectopic molar pregnancy in the tubes and a literature review. Conclusion: The trophoblastic pregnancy disease associated to an ectopic pregnancy is an extremely rare entity that should be considered because of its transcendence.

  11. Bacterial intensity and localization in primary molars with caries disease

    Directory of Open Access Journals (Sweden)

    A P Beltrame

    2012-01-01

    Full Text Available Aim: The aim was to assess the characteristics and outcomes of infections affecting the structures of carious primary molars. Materials and Methods: Forty primary molars were used and classified according to the following clinical situation: With profound caries lesion, with bone loss at the furcation region, with perforation of the pulp chamber floor, and residual roots. The teeth were demineralized, cut, and stained with both haematoxylin-eosin and Brown and Brenn staining techniques. Assessment was performed using optical microscopy. Results: Statistical analysis of the data by means of the Chi-square test suggests that there was a significant relationship (P<0.001 between the intensity and localization of infection and the level of destruction of dental structures. A significant difference was also observed in the intensity and localization of infection between the groups regarding crown, furca, and root (P<0.001. Conclusion: More intense and profound the infection, more severe is the dental destruction. The groups of residual roots showed the most severe bacterial infection compared to other groups.

  12. Distribución y gravedad de las infraoclusiones de molares temporales / Distribution and gravity of infraocclusion in temporary molars

    Scientific Electronic Library Online (English)

    María del Pilar, Zúñiga-Tertre; Tania, Lucavechi-Alcayaga; Elena, Barbería Leache.

    2004-02-01

    Full Text Available Introducción. La infraoclusión es una manifestación cuyo origen es la anquilosis del diente o anquilosis alvéolo dentaria. El crecimiento vertical del diente afectado se encuentra inhibido, y se aprecia por debajo del nivel de oclusión con respecto a los dientes vecinos. El rango de prevalencia de l [...] as infraoclusiones es muy amplio. Debido a la importancia clínica que puede tener esta condición se considera conveniente ahondar en la investigación de la frecuencia con que se observa esta anomalía. Material y método. El estudio se realizó utilizando como referencia las radiografías de aleta de mordida de ambos lados y para estimar los milímetros de infraoclusión se tomo como referencia el primer molar permanente. Resultados. De los 849 expedientes revisados, el 10,48% presentaban infraoclusiones. No hubo diferencias significativas entre sexos. El rango en el cual se presentan mayor número de infraoclusiones es entre los 6 y 8 años. Los primeros molares temporales fueron los dientes más afectados, y las infraoclusiones se consideraron leves en el 69,7% de los casos. Conclusiones. Se puede destacar que las infraoclusiones son una patología común que no tiene predilección por un sexo concreto y se observa con mayor frecuencia en pacientes en dentición mixta, entre la población infantil estudiada. Abstract in english Introduction. Infraocclusion is a condition which has its origin in tooth ankylosis or dentoalveolar ankylosis. The vertical growth of the affected tooth is inhibited and it fails to reach the occlusal level of the surrounding teeth. The range of prevalence of infraocclusion is very wide. Given the [...] clinical importance of this condition it seems advisable to study the frequency with which this anomaly is observed. Materials and method. The study was carried out using bilateral bitewing x-rays as reference for measuring the infraocclusion in millimetres with regard to the first permanent molar. Results. Infraocclusion was present in 10.48% of the 849 cases studied. There were no significant differences between genders. The age period in which infraocclusion was most frequent ranged between 6 and 8 years. The first temporary molars are the most frequently affected teeth and slight infraocclusion was present in 69.7% of the cases. Conclusions. Infraocclusion is a common pathology, which is equally prevalent in both genders and is most frequently seen in patients with mixed dentition in the infant population studied.

  13. Deep inferior epigastric perforator flap: a modification that simplifies elevation.

    Science.gov (United States)

    Stanec, Sanda; Zic, Rado; Budi, Sre?ko; Stanec, Zdenko

    2003-02-01

    The deep inferior epigastric perforator flap is accepted worldwide as a reliable and relatively safe technique for autologous breast reconstruction. Preserving the continuity of the rectus muscle, it reduces donor site morbidity, allowing less postoperative pain, a faster recovery, and a reduced hospital stay. Nevertheless, the more complex nature of this type of surgery leads to increased operating time and a demand for more tedious microsurgical dissection. The authors present a modification of the deep inferior epigastric perforator flap harvesting technique that allows a more safe, simple, and faster elevation of the flap. They have used it successfully for breast reconstruction in 3 patients. PMID:12567046

  14. Pseudo-dissection of ascending aorta in inferior myocardial infarction.

    Directory of Open Access Journals (Sweden)

    Grahame K. Goode

    2011-06-01

    Full Text Available Acute aortic dissection is a cardiac emergency which can present as inferior myocardial infarction. It has high morbidity and mortality requiring prompt diagnosis and treatment. Rapid advances in noninvasive imaging modalities have facilitated the early diagnosis of this condition and in ruling out this potentially catastrophic illness. We report an interesting case of a 57 year- old -man who presented with inferior myocardial infarction requiring thrombolysis and temporary pacing wire for complete heart block. An echocardiogram was highly suspicious of aortic dissection. CT scan confirmed that the malposition of the temporary pacing wire through the aorta mimicked aortic dissection.

  15. Effect of sodium hypochlorite and edta irrigation, individually and in alternation, on dentin microhardness at the furcation area of mandibular molars

    Scientific Electronic Library Online (English)

    Danilo, Zaparolli; Paulo César, Saquy; Antonio Miranda, Cruz-Filho.

    Full Text Available A proposta desse estudo foi avaliar o efeito do NaOCl 1% e do ácido etilenodiaminotetracético 17% (EDTA), de forma isolada e alternada, sobre a microdureza dentinária da região da furca de molares inferiores. A superfície oclusal e as raízes de vinte molares inferiores, recém extraídos, foram cortad [...] as transversalmente e descartadas. Os espécimes foram distribuídos em 4 grupos (n=5) de acordo com a solução irrigante utilizada. As soluções empregadas foram EDTA 17% (I), NaOCl 1% (II), NaOCl 1% e EDTA 17% (III), e água destilada (IV) (controle). Os dentes foram incluídos em blocos de resina acrílica e cortados transversalmente. A hemi-secção que melhor representou a furca dental foi lixada e polida para a avaliação da microdureza Knoop. As medidas obtidas foram analisadas utilizando-se teste ANOVA seguido do teste de comparação múltipla de Tukey (?=0,05). Os resultados desse estudo mostraram que todas as soluções, exceto o grupo controle, diminuíram a microdureza dentinária. O EDTA não apresentou diferença estatística significante em relação ao NaOCl/EDTA (p>0,05), mas foi diferente do NaOCl (p Abstract in english The aim of this study was to evaluate the effect of irrigation regimens on dentin microhardness at the furcation area of mandibular molars, using sodium hypochlorite and ethylenediaminetetraacetic acid (EDTA), individually and in alternation. The occlusal surface and the roots of 20 non-carious extr [...] acted human permanent mandibular molars were cut transversally and discarded. The tooth blocks were embedded in acrylic resin and randomly assigned to 4 groups (n=5) according to the irrigating regimens: 1% NaOCl solution, 17% EDTA solution, 1% NaOCl and 17% EDTA and distilled water (control). Knoop microhardness of dentin at the furcation area was evaluated. Data were analyzed using one-way ANOVA and Tukey's multiple comparison tests (?=0.05). The results of this study indicated that all irrigation solutions, except for distilled water (control), decreased dentin microhardness. EDTA did not show a significant difference with NaOCl/EDTA (p>0.05), but showed a significant difference with NaOCl (p

  16. Patterns of bilateral agenesis of maxillary third molars and agenesis of other teeth.

    Science.gov (United States)

    Sanpei, Sugako; Ishida, Rieko; Sanpei, Shinya; Endo, Saori; Tanaka, Satoshi; Endo, Toshiya; Sekimoto, Tsuneo

    2016-01-01

    The purpose of this study was to investigate the patterns of bilateral agenesis of maxillary third molars and other tooth agenesis in Japanese orthodontic patients. A group of 262 subjects with bilateral agenesis of maxillary third molars (group A) was divided into three subgroups: group 1A consisting of 114 subjects without agenesis of mandibular third molars; group 2A, 31 subjects with unilateral agenesis of mandibular third molars; and group 3A, 117 subjects with agenesis of all third molars. As controls, 926 other subjects without third molar agenesis were selected (group C). Panoramic radiographs were mainly used to examine for tooth agenesis. The Chi square test and odds ratio were used to make statistical comparisons. The prevalence rates of agenesis of maxillary lateral incisors, mandibular incisors and maxillary and mandibular second premolars, and bilateral agenesis of maxillary lateral incisors and second premolars were significantly higher in any one of the third molar agenesis groups than in the control group. Characteristically, no significant increase in occurrence of bilateral agenesis of mandibular second premolars was demonstrated by the subjects with bilateral agenesis of maxillary third molars. Irrespective of whether unilateral or bilateral agenesis of mandibular third molars is present or not, the Japanese orthodontic patients with bilateral agenesis of maxillary third molars exhibited a significantly increased occurrence of unilateral or bilateral agenesis of maxillary lateral incisors, mandibular incisors and maxillary and mandibular second premolars, except for bilateral agenesis of mandibular incisors and second premolars. PMID:25636272

  17. Radiographic evaluation of third molar development in 6 to 24 year olds

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Yun Hwa; Cho, Bong Hae [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Pusan National University, Yangsan (Korea, Republic of)

    2014-09-15

    This study investigated the developmental stages of third molars in relation to chronological age and compared third molar development according to location and gender. A retrospective analysis of panoramic radiographs of 2490 patients aged between 6 and 24 years was conducted, and the developmental stages of the third molars were evaluated using the modified Demirjian's classification. The mean age, standard deviation, minimal and maximal age, and percentile distributions were recorded for each stage of development. A Mann-Whitney U test was performed to test the developmental differences in the third molars between the maxillary and mandibular arches and between genders. A linear regression analysis was used for assessing the correlation between the third molar development and chronological age. The developmental stages of the third molars were more advanced in the maxillary arch than the mandibular arch. Males reached the developmental stages earlier than females. The average age of the initial mineralization of the third molars was 8.57 years, and the average age at apex closure was 21.96 years. The mean age of crown completion was 14.52 and 15.04 years for the maxillary and the mandibular third molars, respectively. The developmental stages of the third molars clearly showed a strong correlation with age. The third molars developed earlier in the upper arch than the lower arch; further, they developed earlier in males than in females.

  18. Síndrome de compresión de vena cava inferior secundario a fibrosis retroperitoneal Inferior vena cava compression syndrome secondary to retroperitoneal fibrosis

    Directory of Open Access Journals (Sweden)

    Alberto Miranda Bravo

    2010-09-01

    Full Text Available Se estudió un paciente de 57 años de edad, de tez negra, con edemas en miembros inferiores relevantes por su volumen y extensión. Se realizó la discusión clínica la cual orientó hacia la búsqueda de una lesión o tumor retroperitoneal asociado a un síndrome de compresión u obstrucción de vena cava inferior y se comprobó imagenológicamente. La confirmación histológica se obtuvo por vía quirúrgica.We studied a 57 year-old patient of black complexion, with swelling of the lower limbs which was relevant due to its mass and extension. The clinical discussion guided us to search for a lesion or retroperitoneal tumor associated with a compression syndrome or obstruction of the inferior vena cava, which was determined radiologically. Histological confirmation was obtained through surgery.

  19. Stability of molar relationship after non-extraction Class II malocclusion treatment

    Scientific Electronic Library Online (English)

    Darwin Vaz de, Lima; Karina Maria Salvatore de, Freitas; Marcos Roberto de, Freitas; Guilherme, Janson; José Fernando Castanha, Henriques; Arnaldo, Pinzan.

    2013-04-01

    Full Text Available OBJETIVO: esse estudo objetivou avaliar a estabilidade da relação molar na má oclusão de Classe II tratada ortodonticamente sem extrações, visando quantificar a recidiva e correlacioná-la a alguns fatores. MÉTODOS: a amostra constituiu-se de 39 indivíduos (16 mulheres e 23 homens) com má oclusão de [...] Classe II tratada sem extrações, com aparelhos fixos. A idade inicial média foi de 12,94 anos; na fase final, foi de 15,14 anos; na pós-contenção, 21,18 anos. A média do tempo de tratamento foi de 2,19 anos e do tempo de avaliação pós-tratamento, de 6,12 anos. Para verificar a influência da severidade da relação molar de Classe II inicial na estabilidade da relação molar, a amostra foi dividida em dois grupos, um apresentando relação molar de ½ Classe II ou ¾ de Classe II, e outro apresentando relação molar de Classe II completa. Nos modelos de estudo das três fases estudadas, foram medidas a relação molar, as relações de primeiros e segundos pré-molares e de caninos. Os dados foram analisados pelos testes ANOVA dependente, de Tukey, correlação de Pearson e teste t independente entre dois grupos, divididos pela severidade da relação molar inicial. RESULTADOS: houve recidiva não significativa de 0,12mm na relação molar. A severidade inicial da relação molar de Classe II não se correlacionou com a recidiva no período pós-contenção. Quando a amostra dividiu-se em dois grupos, nenhuma diferença foi encontrada na recidiva da relação molar. CONCLUSÃO: a correção da relação molar de Classe II é estável e a severidade inicial não exerce influência sobre a recidiva da relação molar. Abstract in english OBJECTIVE: This study aimed to evaluate the stability of molar relationship after non-extraction treatment of Class II malocclusion. METHODS: The sample comprised 39 subjects (16 females, 23 males) with initial Class II malocclusion treated with no extractions, using fixed appliances. Mean age at th [...] e beginning of treatment was 12.94 years, at the end of treatment was 15.14 years and at post-retention stage was 21.18 years. Mean treatment time was 2.19 years and mean time of post-treatment evaluation was 6.12 years. To verify the influence of the severity of initial Class II molar relationship in stability of molar relationship, the sample was divided into two groups, one presenting a ½-cusp or ¾-cusp Class II molar relationship, and the other with full-cusp Class II molar relationship. In dental casts from initial, final and postretention stages, molar, first and second premolars and canine relationships were measured. Data obtained were analyzed by dependent ANOVA, Tukey and Pearson's correlation tests, as well as independent t test between the two groups divided by severity of initial molar relationship. RESULTS: There was a non-statistically significant 0.12 mm relapse of molar relationship. The initial severity of Class II molar relationship was not correlated to relapse in the post-retention period. When compared, the two groups showed no difference in relapse of molar relationship. CONCLUSION: It was concluded that correction of Class II molar relationship is stable and initial severity does not influence relapse of molar relationship.

  20. Qualidade de vida de pacientes submetidos à exodontia de terceiros molares / Quality of life in patients undergoing third molar extraction

    Scientific Electronic Library Online (English)

    Talita Lopes dos, Santos; Elis Janaina Lira dos, Santos; Rodrigo Barros Esteves, Lins; Lucas Formiga, Araújo; Bruno da Silva, Mesquita; Talvane, Sobreira.

    2015-02-01

    Full Text Available INTRODUÇÃO: A remoção dos terceiros molares pode causar transtornos e prejuízos à qualidade de vida. OBJETIVO: Avaliar a qualidade de vida de pacientes submetidos à exodontia de terceiros molares, discutindo os eventos mais comumente observados. MATERIAL E MÉTODO: Sessenta pacientes de uma Clínica [...] Privada de Cirurgia, da cidade de João Pessoa-PB, foram submetidos à exodontia de terceiros molares, pelo mesmo operador e em condições semelhantes. Os dados foram coletados em duas etapas: a primeira foi realizada no dia do procedimento, quando foram anotados os dados do paciente, assim como as informações relacionadas à cirurgia. A segunda etapa foi realizada sete dias após o procedimento, quando os pacientes responderam o formulário acerca da qualidade de vida durante o pós-operatório. RESULTADO: 71,4% dos pacientes submetidos a Osteotomia e Odontossecção mantiveram suas atividades normais, e 28,6% não mantiveram. No entanto, quanto aos pacientes não submetidos às técnicas, 40,9% mantiveram suas atividades normais e 59,1% não mantiveram. De acordo com a classificação de Pell & Gregory, percebeu-se que 71,4% dos pacientes Classe 3 mantiveram suas atividades sociais normalmente, enquanto 60% dos pacientes Posição C não as mantiveram. Dos pacientes que se isolaram socialmente e foram submetidos às técnicas, 71,4% relataram a dor como o principal motivo, e 100% dos pacientes Classe 3 e 80% dos pacientes Posição C optaram pela mesma resposta. CONCLUSÃO: Os resultados indicam que as técnicas empregadas no transoperatório não interferem na qualidade de vida do paciente durante o pós-operatório e a posição tem maior influência do que a classe, no que se refere ao desenvolvimento normal das atividades sociais. Abstract in english INTRODUCTION: The removal of third molars can cause disorders and damage in quality of life. OBJECTIVE: This study aimed to evaluate the quality of life in patients underwent surgery, discussing the most commonly events observed. MATERIAL AND METHOD: Sixty patients of a private surgery clinic from [...] João Pessoa/PB were underwent extraction of third molars by the same surgeon and and under the same conditions. Data were collected in two steps: the first one was accomplished at the day of the procedure, which were noted down both patient and surgery informations. The second step were realized seven days after the procedure, the patients answered a form about life quality at the postoperative period. RESULT: 71,4% patients underwent to osteotomy and odontosection maintained their normal activities and 28,6% did not. While in patients not submitted to the techniques, 40,9% maintained their normal activities and 59,1% did not. According to Pell & Gregory classification, 71,4% of patients Class 3 maintained normally their social activities, while 60% of patients Position C didn´t. Patients who remained socially isolated and were underwent to techniques, 71,4% reported as the main reason the pain, and 100% of patients Class 3 and 80% of patients Position C have chosen the same answer. CONCLUSION: The results suggest that the techniques used in the transoperative does not influence the quality of life during the postoperative and the position has more influence than the class, in respect to the development of normal social activities.

  1. Transhepatic approach for extracardiac inferior cavopulmonary connection stent fenestration.

    LENUS (Irish Health Repository)

    Kenny, Damien

    2012-02-01

    We report on a 3-year-old male who underwent transcatheter stent fenestration of the inferior portion of an extracardiac total cavopulmonary connection in the setting of hypoplastic left heart syndrome. Transhepatic approach, following an unsuccessful attempt from the femoral vein facilitated delivery of a diabolo-shaped stent.

  2. [Accessory retrograde aneurysmal aortic lumen supplying the inferior mesenteric artery].

    Science.gov (United States)

    Champsaur, P; Juhan, V; Scheiner, C; Branchereau, A; Bartoli, J; Chagnaud, C

    2000-08-01

    We report the case of a patient with infrarenal abdominal aortic aneurysm with mural thrombus covering the ostium of a patent inferior mesenteric artery (IMA). The IMA was supplied via flow from an accessory aneurysmal lumen within the mural thrombus that filled retrogradely from the aorta. This unusual pattern, associated with calcifications within the thrombus, raised the possibility of chronic aortic dissection. PMID:10916008

  3. Comparison of two needle models in terms of bevel deformation during truncal block of the inferior alveolar nerve

    Scientific Electronic Library Online (English)

    Nieves, Almendros Marqués; Esther, Delgado Molina; Meritxell, Tamarit Borrás; Leonardo, Berini Aytés; Cosme, Gay Escoda.

    2007-08-01

    Full Text Available Objetivos: Evaluar las posibles diferencias existentes en cuanto a la deformación del bisel de dos tipos de aguja de igual longitud y calibre externo, pero de distinto diámetro interno, durante el bloqueo troncal del nervio dentario inferior. Diseño del estudio: Cuatro operadores de similar formació [...] n quirúrgica realizaron el bloqueo troncal del nervio dentario inferior y la anestesia infiltrativa del nervio bucal para proceder a la extracción quirúrgica o convencional del tercer molar inferior en 266 pacientes. Para efectuar el bloqueo troncal se utilizó en todos los casos un sistema de jeringa no auto-aspirante (Uniject K®; Hoechst AG, Frankfurt, Alemania) y dos tipos de aguja: una aguja Monoprotect® de 27G x 35 mm con un calibre interno de 0.215 mm (Sofic SA, Mazamet, Francia) o una aguja XL Monoprotect® de 27G x 35 mm con un calibre interno de 0.265 mm (Sofic SA, Mazamet, Francia). Para hacer la anestesia infiltrativa del nervio bucal se utilizó el mismo tipo de jeringa y otros dos tipos de aguja: la Monoprotect®o la XL Monoprotect®, ambas con un calibre de 30G y 25 mm de longitud, diferenciándose en su calibre interno (0.215 y 0.265 mm, respectivamente) (Sofic SA, Mazamet, Francia). En cada paciente fue recopilada de forma sistemática la siguiente información: el tipo de aguja, la técnica anestésica utilizada (troncular directa o indirecta) y el número de veces que se había contactado con el hueso durante ésta, el lado de trabajo del operador, el lado del diente a extraer, el operador que hizo la intervención quirúrgica, así como la presencia o ausencia de deformación del bisel tras la técnica anestésica. Resultados: Para la técnica troncular, sólo se observó una asociación estadísticamente significativa entre la deformación de los biseles de las agujas y el operador que efectuó la técnica anestésica, mientras que para la técnica infiltrativa, se encontró una asociación estadísticamente significativa (p Abstract in english Objectives: To evaluate the differences in terms of bevel deformation between two types of needle of the same length and external caliber, but with different internal diameters, during truncal block of the inferior alveolar nerve. Study design: Four operators performed truncal block of the inferior [...] alveolar nerve and infiltrating anesthesia of the buccal nerve for the extraction of a lower third molar in 266 patients. The truncal block was carried out using a standard 27G x 35 mm needle with an internal caliber of 0.215 mm, or a 27G x 35 mm XL Monoprotect® needle with an internal caliber of 0.265 mm. The infiltrating anesthesia was made with a Monoprotect® or XL Monoprotect® needle, both with a caliber of 30G and a length of 25 mm, but with different internal calibers (0.215 and 0.265 mm, respectively). The type of needle used, the anesthetic technique and the number of bone contacts was established during the procedure, the operator working side, the side of the tooth to be removed, the operator in charge of the intervention and the presence of bevel deformation after the anesthetic technique were collected for each patient. Results: A statistically significant association was observed between bevel deformation and the operator performing the truncal block, while a statistically significant association (p

  4. Incidencia de comunicación bucosinusal tras la extracción de 389 terceros molares superiores / Incidence of oral sinus communications in 389 upper third molar extraction

    Scientific Electronic Library Online (English)

    Marta del, Rey Santamaría; Eduard, Valmaseda Castellón; Leonardo, Berini Aytés; Cosme, Gay Escoda.

    2006-07-01

    Full Text Available Introducción. La incidencia de las comunicaciones bucosinusales (CBS) tras la extracción del tercer molar superior no se conoce con exactitud. Objetivos. El objetivo de este estudio fue identificar la incidencia de las CBS tras la extracción de 389 cordales superiores realizadas durante el año 2003 [...] en el Máster de Cirugía Bucal e Implantología Bucofacial de la Universidad de Barcelona. Material y método. Se registraron diversas variables con el fin de determinar la relación de la extracción del tercer molar con la incidencia de las CBS: la edad y el sexo del paciente, la angulación del cordal, la técnica quirúrgica y la sospecha radiológica de proximidad con el seno maxilar. Resultados. Únicamente el 5.1% (IC 95%: 2.2-7.3%) de las extracciones quirúrgicas de los cordales superiores provocaron una CBS. El riesgo de producir una CBS fue similar en todos los grupos de edad, y aumentó con la profundidad de inclusión del tercer molar, la complejidad de la técnica quirúrgica y al efectuar ostectomía. Abstract in english Introduction. The incidence of oral sinus communications (OSC) following the extraction of an upper third molar remains uncertain. Objectives. The purpose of this study was to determine the incidence of OSC following the extraction of 389 consecutive upper third molars during 2003 in the Master of O [...] ral Surgery and Orofacial Implantology (Barcelona University, Spain). Patients and method. Different variables were recorded, including patient age, sex, molar angulation, surgical technique and radiological sinus proximity, to determine the relation between third molar extraction and the incidence of OSC. Results. Only 5.1% (95% CI: 2.2-7.3%) of the upper molar surgical extractions produced OSC, the risk of which was found to be similar in all age groups and increased with the depth of third molar inclusion, the complexity of the surgical technique and the performance of an ostectomy.

  5. Injuries of the retrohepatic inferior vena cava and the liver

    Directory of Open Access Journals (Sweden)

    Koprivica Radenko

    2008-01-01

    Full Text Available Beckground. Injuries of the retrohepatic inferior vena cava, and the liver have mortality rate up to 71-78%. We presented a patient with combined injury of the retrohepatic inferior vena cava, liver, craniocerebral and thoracic traumas, inflicted in a traffic accident. Case report. Man, 20 years old has been injured in a traffic accident. At admission, 20 minutes after the injury, the patient was comatose and hypotensive. Bloody content was obtained by abdominal tracer. The patient underwent emergent laparotomy, utilizing trifurcated incision and cell saver device. Abdominal exploration revealed two liters of free blood and massive retroperitoneal hematoma. Manual compression of the liver was done, as well as perihepatic packing, complete hepatic vascular exclusion and mobilization of the right liver lobe. Due to impressive chemodynamic instability supraceliac aortic clamping was performed. Upon exposure of the retrohepatic inferior vena cava and right liver lobe, multiple lacerations of retrohepatic inferior vena cava and right hepatic vein, and right hepatic vein avulsion were found. We also identified an injury of VII and VIII segments of the liver (grade V according to the Moore's classification. Nonexpansive hepatoduodenal ligament hematoma and the injury of II and III segments of the liver group II/III according to Moore were found. Venorrhaphy of the inferior vena cava was done in the area of circumference of the right hepatic vein, a portion of which served as autologous vein patch. Continuous prolene 3/0 venorrhaphy of the distal caval laceration was done. Total caval and aorta clamping time of the inferior vena cava was 41 minutes. Atypical resection, debridment, of hepatic segments was done by using a harmonic scalpel. Hepatoduodenal ligament was declamped after 65 minutes. Fibrin glue was applied on the resectioned area of liver. The patient received 3.2 l of autologuos blood transfusion with 5 units of packed red blood cells, 6 units of fresh frozen plasma, 13 units of concentrated thrombocytes and 15 units of cryoprecipitates. Due to coagulopathy, factor rVIIa was administered. Bilateral toracal drainage was done. Small bilateral contusions of the frontal part of the brain were noticed but the patient successfully recovered and was dismissed after three weeks. Conclusion. Combined injuries of the inferior vena cava and the liver befall into the most complex vascular traumas, thus representing a challenge for any complete medical team to manage them. The patient presented in our study was urgently transported to the hospital, immediately operated on applying modern doctrines of anesthesiology, transfusiology and vascular surgery that, all together, resulted into favorable treatment outcome with no distant complications.

  6. Endodontic Management of Maxillary Second Molar with Two Palatal Roots: A Report of Two Cases

    OpenAIRE

    Pawan Patel; Surbhi Patel

    2012-01-01

    Endodontic treatment may sometimes fail because morphological features of the tooth adversely affect the treatment protocol. Maxillary second molars are recognized as usually having a single palatal root with a single palatal canal. The incidence of second palatal root in the maxillary second molar is very rare. Two cases are presented in this paper describing the endodontic management of a four-rooted maxillary second molar with two distinct palatal roots and canals and two distinct buccal r...

  7. Containing the cost of third-molar extractions: a dilemma for health insurance.

    OpenAIRE

    Friedman, J W

    1983-01-01

    No known scientific studies support the extraction of third molars (wisdom teeth) to prevent future disease. Yet, third-molar surgery for this purpose has become so common that in at least one major U.S. health insurance plan, the cumulative cost exceeds that for every other kind of major surgery. Many third molars that are developing normally in adolescents are classified as impacted and removed before they erupt, a practice that results in large expenditures for unnecessary surgery. In addi...

  8. Micro?CT analyses of apical enlargement and molar root canal complexity

    DEFF Research Database (Denmark)

    Markvart, M.; Darvann, Tron Andre; Larsen, P.; Dalstra, M.; Kreiborg, S.; Bjørndal, L.

    2012-01-01

    Markvart M, Darvann TA, Larsen P, Dalstra M, Kreiborg S, Bjørndal L. Micro?CT analyses of apical enlargement and molar root canal complexity. International Endodontic Journal, 45, 273–281, 2012. Aim To compare the effectiveness of two rotary hybrid instrumentation techniques with focus on apical enlargement in molar teeth and to quantify and visualize spatial details of instrumentation efficacy in root canals of different complexity. Methodology Maxillary and mandibular molar teeth were scanned ...

  9. Three-dimensional molar enamel distribution and thickness in Australopithecus and Paranthropus

    OpenAIRE

    Olejniczak, A.J; Smith, T.M; Skinner, M M; Grine, F E; Feeney, R.N.M; Thackeray, J.F; Hublin, J.-J

    2008-01-01

    Thick molar enamel is among the few diagnostic characters of hominins which are measurable in fossil specimens. Despite a long history of study and characterization of Paranthropus molars as relatively ‘hyper-thick’, only a few tooth fragments and controlled planes of section (designed to be proxies of whole-crown thickness) have been measured. Here, we measure molar enamel thickness in Australopithecus africanus and Paranthropus robustus using accurate microtomographic methods, recording the...

  10. Prediction of postoperative pain after mandibular third molar surgery

    DEFF Research Database (Denmark)

    Rudin, Asa; Eriksson, Lars

    2010-01-01

    To evaluate the predictive potential of preoperative psychological and psychophysiological variables in estimating severity of postoperative pain following mandibular third molar surgery (MTMS). Methods: Following ethical committee approval and informed consent, 40 consecutive patients scheduled for MTMS were included. Preoperative psychometric indicators of anxiety, depression, and vulnerability were evaluated by patient questionnaires. Thermal thresholds and heat pain perception (1 second phasic stimuli: 44 degrees C to 48 degrees C) were evaluated with quantitative sensory testing techniques. Standardized surgery was performed during local anesthesia. Postoperative pain management was with rescue paracetamol and ibuprofen. The patients were instructed to record each day their pain at rest and during dynamic conditions, and their requirement of analgesics for 14 days following surgery.

  11. Management of a hopeless mandibular molar: a case report.

    Science.gov (United States)

    Asgary, Saeed

    2011-01-01

    Intentional tooth reimplantation can be an alternative treatment option for teeth with poor or hopeless prognosis where coronal and surgical endodontic treatment(s) are not possible. This technique may help to restore a natural tooth to function in preference to prosthesis/implant replacements. A 38-years old male was referred to private practice with persistent chronic apical periodontitis of a previously root canal treated mandibular left first molar. A furcal perforation and distolingual cusp fracture was previously repaired and treated with amalgam (~5 years ago). In view of the patient/tooth's limitations, intentional reimplantation was planned using CEM cement retrograde filling. Clinical and radiographic follow-up during 2 years postoperatively revealed no sign/symptoms of infection or inflammation. Moreover, periradicular healing was evident on radiographs. PMID:23130053

  12. Management of a hopeless mandibular molar: A case report

    Directory of Open Access Journals (Sweden)

    saeed asgary

    2011-01-01

    Full Text Available Intentional tooth reimplantation can be an alternative treatment option for teeth with poor or hopeless prognosis where coronal and surgical endodontic treatment(s are not possible. This technique may help to restore a natural tooth to function in preference to prosthesis/implant replacements. A 38-years old male was referred to private practice with persistent chronic apical periodontitis of a previously root canal treated mandibular left first molar. A furcal perforation and distolingual cusp fracture was previously repaired and treated with amalgam (~5 years ago. In view of the patient/tooth’s limitations, intentional reimplantation was planned using CEM cement retrograde filling. Clinical and radiographic follow-up during 2 years postoperatively revealed no sign/symptoms of infection or inflammation. Moreover, periradicular healing was evident on radiographs.

  13. An unusual occurrence of bilaterally geminated mandibular second premolars resulting in premolar molarization: A case report

    Directory of Open Access Journals (Sweden)

    A V Rajesh Ebenezar

    2013-01-01

    Full Text Available Gemination refers to an attempt by a single tooth bud to divide, with a resultant formation of either a large tooth with a bifid crown or two completely divided teeth throughout the crown and root. This report describes a rare case of bilateral gemination of permanent mandibular second premolar tooth giving rise to molarization of premolars. The mesiodistal width of these teeth is similar to mandibular molars, but the cervicoocclusal width is lesser than that of the molar tooth. This paper also discusses the potential orthodontic, periodontal, and endodontic complications of premolar molarization.

  14. Recurrent condylar luxation after third molar extraction: an uncommon condition treated by eminectomy / Luxação condilar recorrente após exodontia de terceiro molar: uma condição incomum tratada através de eminectomia

    Scientific Electronic Library Online (English)

    Maiolino Thomaz Fonseca, OLIVEIRA; Átila Roberto, RODRIGUES; Flaviana Soares, ROCHA; Darceny, ZANETTA-BARBOSA.

    2014-01-01

    Full Text Available INTRODUÇÃO: A exodontia dos terceiros molares raramente promove complicações pós-operatórias como desordens temporomandibulares. OBJETIVO: Embora a literatura apresente uma série de discussões sobre a evidência clínica relacionada a este assunto, neste artigo, apresentamos um caso incomum de um [...] a paciente submetida à extração dos terceiros molares que apresentou, no acompanhamento pós-operatório, luxação condilar recorrente bilateral. CONCLUSÃO: Devido a este estado crítico, a paciente foi tratada com sucesso pela eminectomia bilateral após tentativas terapêuticas não cirúrgicas. Abstract in english INTRODUCTION: Extraction of third molars can rarely provoke post-operative complications, such as temporomandibular joint disorders (TMDs). OBJECTIVE: Although the literature presents a series of discussions of the clinical evidence related to this subject, in this report, we present an uncomm [...] on case of a patient submitted for the extraction of third molars who presented, in postoperative monitoring, with recurrent bilateral condylar luxation. CONCLUSION: Due to this critical condition, the patient was successfully treated by bilateral eminectomy.

  15. Effects of the use of powdered demineralized allograft on the periodontal indexes on the distal surface of second molars after lower third molar surgery

    Directory of Open Access Journals (Sweden)

    Sayed Mehdi Ghoreishian

    2012-01-01

    Full Text Available Introduction: Several studies have evaluated the effect of surgical removal of the impacted lower third molars on periodontal lesions around the adjacent second molars and the recovery of these lesions. The aim of this study was to evaluate the effect of demineralized bone protein on the recovery of periodontal lesions after third molar surgery in patients referring to the Department of Oral and Maxillofacial Surgery, Isfahan Faculty of Dentistry. Materials and Methods: In this single-blind clinical trial, 16 patients referring to the Department of Oral and Maxillofacial Surgery, who were candidates for the bilateral surgical removal of lower third molars, were randomly selected. Inclusion criteria consisted of the lower third molar impaction and presence of second lower molars, and a mean age of 26 years. Pocket depths and attachment levels on the distal surface of second molars were measured in the case and control groups before surgery and 12 weeks post-operatively. Data in relation to means of changes were analyzed by paired t-test using SPSS software (? = 0.05. Results: The results of this study showed statistically significant differences in pocket depths and attachment levels before surgery and 12 weeks post-operatively each group (p value < 0.001. According to paired t-test there were no statistically significant differences in pocket depths (p value = 0.497 and attachment levels (p value = 0.155 between the two groups 12 weeks post-operatively. Conclusion: Under the limitations of the present study, use of demineralized bone protein had no effect on periodontal parameters after surgical removal of impacted lower third molars. Key words: +.

  16. Root Trifurcation of Upper Permanent Second Molars: Anatomical Aspects of Clinical Interest Trifurcación de la Raíz de Segundos Molares Permanentes: Aspectos Anatómicos de Interés Clínico

    OpenAIRE

    Fabiano Jeremias; Lourdes Santos-Pinto; Hélio Ferraz Porciúncula

    2009-01-01

    The aim of this study was to analyze the relationship among the point of greatest depression on the root trifurcation floor and the furcation openings of the maxillary second molars. Sixty human extracted upper permanent second molars were analyzed and the furcation area were measured using a vertical calliper, and the values regarding the point of deepest depression were recorded. The results showed that the deepest depression in the trifurcation floor of the roots is centrally situated in 1...

  17. Appearance of dentin gamma-carboxyglutamic acid-containing proteins in developing rat molars in vitro

    International Nuclear Information System (INIS)

    An in vitro model of mineralization was devised in order to study the developmental appearance of dentin gamma-carboxyglutamic acid-containing proteins (DGPs) in relation to the onset of mineralization. Maxillary third molars from 11-day-old rats were cultured with or without fetal calf serum (FCS) as modified from Navia et al. Molars were incubated without radiolabel, or with either 45CaCl2 (5 microCi/ml) for 24 hr at various stages of a ten-day culture period or [3H]-leucine (10 microCi/ml) for 24 hr at the eighth day of culture. Molars were lyophilized and extracted with 10% formic acid overnight at 4 degrees C. DGPs in extracts were detected by immunologic and chromatographic techniques; DGPs in molar sections were detected by immunolocalization using indirect immunofluorescence. Molar development was evaluated histologically using the Von Kossa staining technique. Molars cultured with FCS showed histologic evidence for mineralized dentin and enamel and a significant increase in 45Ca uptake after the sixth day in vitro. Eleven-day-old molars in vivo and molars cultured without FCS showed no evidence of the presence of mineralized tissues. [3H]-Leucine-labeled DGPs were isolated and identified by affinity and reversed-phase high-performance liquid chromatography and by gel electrophoresis from both mineralized and unmineralized molars. DGP antigens were localized immunohistochemically using rabbit anti-rat antibodies raised against a highly purified DGP preparation. In the unmineralized molar, antigenicity was seen in odontoblasts but not in predentin matrix, preodontoblasts, or in any other cell type. Antigens in the mineralized molar were localized to odontoblasts and dentin

  18. Comparison of panoramic radiography with cone beam CT in predicting the relationship of the mandibular third molar roots to the alveolar canal

    Energy Technology Data Exchange (ETDEWEB)

    Shahidi, Shoaleh; Zamiri, Barbod; Bronoosh, Pegah [School of Dentistry, Shiraz University of Medical Sciences, Shiraz (Iran, Islamic Republic of)

    2013-06-15

    Preoperative radiographic assessment of the mandibular third molars is essential to prevent inferior alveolar nerve damage during extraction. The purpose of this study was to assess the reliability of panoramic signs of association between the roots of teeth and the canal, and to compare the panoramic signs with cone beam computed tomography (CBCT) findings. CBCT images of 132 impacted mandibular third molars were evaluated to determine the association of the root to the canal. The CBCT findings were compared with the corresponding panoramic images. Logistic regression analysis was used to define the diagnostic criteria of the panoramic images. Among the panoramic signs, loss of the cortical line was the most frequent radiographic sign predicting association (sensitivity: 79.31). Contact of the tooth with the canal was observed in all cases in which the loss of cortical line of the canal or darkening of the roots was found on the panoramic radiographs. Darkening of the roots and loss of the cortical line on panoramic radiographs might be highly suggestive of the risk of nerve injury.

  19. First molar cross-bite is more closely associated with a reverse chewing cycle than anterior or pre-molar cross-bite during mastication.

    Science.gov (United States)

    Tomonari, H; Ikemori, T; Kubota, T; Uehara, S; Miyawaki, S

    2014-12-01

    A posterior cross-bite is defined as an abnormal bucco-lingual relationship between opposing molars, pre-molars or both in centric occlusion. Although it has been reported that patients with unilateral posterior cross-bite often show unique chewing patterns, the relationship between the form of cross-bite and masticatory jaw movement remains unclear in adult patients. The objective of this study was to investigate masticatory jaw movement among different forms of cross-bite. One hundred and one adults were recruited in this study: 27 had unilateral first molar cross-bite (MC group); 28, unilateral pre-molar cross-bite (PC group); 23, anterior cross-bite (AC group); and 23, normal occlusion (control group). Masticatory jaw movement of the lower incisor point was recorded with six degrees of freedom jaw-tracking system during unilateral mastication. Our results showed that the reverse chewing ratio during deliberate unilateral mastication was significantly larger in the MC group than in the PA (P < 0.001), AC (P < 0.001) and control (P < 0.001) groups. These findings suggest that compared to the anterior or pre-molar cross-bite, the first molar cross-bite is more closely associated with a higher prevalence of a reverse chewing cycle. PMID:25158937

  20. A digital volumetric tomography (DVT) study in the mandibular molar region for miniscrew placement during mixed dentition

    Scientific Electronic Library Online (English)

    Mayur S., Bhattad; Sudhindra, Baliga; Pavan, Vibhute.

    2015-04-01

    Full Text Available OBJETIVO: avaliar, por meio de tomografia volumétrica digital (TVD), a espessura óssea necessária para a instalação de mini-implante na arcada inferior durante a fase de dentição mista. MÉTODOS: um total de 15 pacientes saudáveis, com idades entre 8 e 10 anos, com segundo molar inferior decíduo irr [...] ompido recentemente, foram incluídos no presente estudo. Imagens de TVD da hemiarcada inferior foram obtidas utilizando sistemas de imagens extrabucais Kodak. As imagens foram analisadas por meio do programa de imagens Kodak. O erro do método (EM) foi calculado utilizando a fórmula de Dahlberg. Médias e desvios-padrão foram calculados de 6 a 8mm aquém da junção amelocementária. O teste t foi utilizado para a análise das medidas. RESULTADOS: a espessura do osso cortical vestibular, largura mesiodistal e profundidade óssea vestibulolingual, a 6mm, foram de 1,73 + 0,41; 2,15 + 0,49; e 13,18 + 1,22 mm, respectivamente. Já a 8mm, os valores foram de 2,42 + 0,34; 2,48 + 0,33; e 13,65 + 1,25mm. O EM para a espessura do osso cortical vestibular, largura mesiodistal e profundidade óssea vestibulolingual foi de 0,58, 0,40 e 0,48mm, respectivamente. A diferença entre as medidas a 6 e 8mm para a espessura do osso cortical vestibular (p Abstract in english OBJECTIVE: To assess bone thickness for miniscrew placement in the mandible during mixed dentition by using digital volumetric tomograph (DVT). MATERIAL AND METHODS: A total of 15 healthy patients aged 8-10 years old, with early exfoliated mandibular second deciduous molar, were included. DVT image [...] s of one quadrant of the mandible were obtained using Kodak extraoral imaging systems and analyzed by Kodak dental imaging software. The error of the method (EM) was calculated using Dahlberg's formula. Mean and standard deviation were calculated at 6 and 8 mm from the cementoenamel junction (CEJ).Paired t-test was used to analyze the measurements. RESULTS: Buccal cortical bone thickness, mesiodistal width and buccolingual bone depth at 6 mm were found to be 1.73 + 0.41, 2.15 + 0.49 and 13.18 + 1.22 mm, respectively; while at 8 mm measurements were 2.42 + 0.34, 2.48 + 0.33 and 13.65 + 1.25 mm, respectively. EM for buccal cortical bone thickness, mesiodistal width and buccolingual bone depth was 0.58, 0.40 and 0.48, respectively. The difference in measurement at 6 and 8 mm for buccal cortical plate thickness (P 0.05). CONCLUSION: Bone thickness measurement has shown promising evidence for safe placement of miniscrews in the mandible during mixed dentition. The use of miniscrew is the best alternative, even in younger patients.

  1. Programa de extrações seriadas: variáveis relacionadas com a extração de pré-molares / Serial extraction: variables associated to the extraction of premolars

    Scientific Electronic Library Online (English)

    Tulio Silva, Lara; Cibelle Cristina Oliveira dos, Santos; Omar Gabriel da, Silva Filho; Daniela Gamba, Garib; Francisco Antônio, Bertoz.

    2011-10-01

    Full Text Available OBJETIVO: verificar o percentual de pacientes que necessitaram extração de dentes permanentes, pré-molares, dentre aqueles tratados com extração de dentes decíduos para correção do apinhamento primário na dentição mista, bem como analisar as possíveis variáveis relacionadas. MÉTODOS: a amostra foi c [...] omposta por documentações ortodônticas de 70 pacientes na dentição permanente, cujo tratamento iniciou-se na dentição mista com planejamento de um programa de extrações seriadas (PES). Todos os prontuários foram analisados por um único examinador, no intuito de verificar se o PES havia sido cumprido com a extração de dentes permanentes ou se havia sido realizada apenas extração de dentes decíduos. Verificou-se a associação entre a extração de dentes permanentes e as variáveis padrão facial; relação sagital entre as arcadas dentárias; IMPA; proporção tamanho do segundo molar permanente inferior/espaço retromolar; mecânica de controle de espaço e discrepância de modelo (teste exato de Fisher para as variáveis categóricas e modelo de regressão logística para as variáveis numéricas). Os resultados foram considerados para p Abstract in english OBJECTIVE: To verify the amount of patients who had to undergo extraction of permanent teeth (premolars) in a population of patients treated with extraction of deciduous teeth for correction of incisor crowding in the mixed dentition, as well as to analyze the possibly related variables. METHODS: Th [...] e sample was composed of orthodontic records of 70 patients in the permanent dentition whose treatment included the serial extraction program (SEP) in the mixed dentition. All records were analyzed by a single examiner in order to verify whether the SEP had been carried out with extraction of either permanent teeth or deciduous teeth only. The association between extraction of permanent teeth and the variables lateral facial pattern, sagittal relationship between the dental arches, IMPA, proportion between size of the mandibular second molar/retromolar space, mechanics for spacing control and tooth-arch size discrepancy (exact test of Fisher for categorical variables and logistic regression for numeric variables, p

  2. Estratégias em reconstrução do lábio inferior / Lower lip reconstruction strategies

    Scientific Electronic Library Online (English)

    Evandro José, Siqueira; Gustavo Steffen, Alvarez; Francisco Felipe, Laitano; Pedro Djacir Escobar, Martins; Milton Paulo de, Oliveira.

    2012-12-01

    Full Text Available INTRODUÇÃO: Os lábios superiores e inferiores representam as estruturas anatômicas funcionais e estéticas mais importantes do segmento inferior da face. Além disso, possuem funções complexas, sendo a reconstrução de defeitos labiais um desafio ao cirurgião plástico. MÉTODO: Trinta pacientes apresent [...] ando defeitos de espessura total do lábio inferior foram submetidos a reconstrução do lábio baseada na extensão dos defeitos após exérese tumoral. RESULTADOS: Seis (20%) pacientes apresentavam lesões de até 30% da superfície total do lábio, sendo realizado fechamento primário. Dezoito (60%) pacientes apresentavam lesões de 30% a 80% da superfície total do lábio inferior, sendo realizado retalho miomucoso de vermelhão; em 14 desses pacientes, em decorrência da perda cutânea associada à ressecção, foi associado retalho cutâneo mentolabial. Cinco (16,6%) pacientes tinham lesões no lábio inferior e comissura oral adjacente, sendo submetidos a reconstrução pela técnica de Abbé-Estlander com retalho miomucoso associado ao retalho cutâneo mentolabial. Um (3,5%) paciente apresentou lesão de 90% da superfície total do lábio inferior, sendo empregada técnica de Webster-Bernard associada ao retalho de língua. CONCLUSÕES: Neste artigo é apresentada, de forma simplificada, sistemática e baseada na literatura, uma estratégia para planejamento da reconstrução do lábio inferior com utilização de técnicas eficazes e reprodutíveis em ambiente de aprendizado de médicos residentes, para tratamento de lesões complexas do lábio inferior, baseadas na extensão da perda de tecidos apresentada pelo paciente, com adequados resultados estético-funcionais. Abstract in english BACKGROUND: The upper and lower lips represent the most important functional and aesthetic anatomical structures of the lower segment of the face. Given the complex functions of these structures, reconstruction of labial defects presents a challenge for plastic surgeons. METHODS: Thirty patients wit [...] h full-thickness lower lip defects underwent lip reconstruction according to the extent of the defect after tumor resection. RESULTS: Six (20%) patients presented lesions of up to 30% of the total lip surface that required primary closure. Eighteen (60%) patients had lesions of 30-80% of the total area of the lower lip that were repaired using a myomucosal flap; in 14 of these patients, bilateral skin flaps were also used due to cutaneous involvement associated with the resection. Five (16.6%) patients had lesions on the lower lip that were adjacent to the oral commissure; therefore, they underwent reconstruction using an Abbé-Estlander flap with a myomucosal flap and bilateral skin flaps. One (3.5%) patient had a lesion covering 90% of the lower lip that was reconstructed using the Webster-Bernard technique and a tongue flap. CONCLUSIONS: Here, we present a simplified, systematic, and literature-based strategy for planning lower lip reconstructions that employs effective and reproducible techniques, which can be used for training resident physicians in the treatment of complex lower lip lesions according to the extent of tissue loss, thereby yielding appropriate aesthetic and functional results.

  3. Estratégias em reconstrução do lábio inferior Lower lip reconstruction strategies

    Directory of Open Access Journals (Sweden)

    Evandro José Siqueira

    2012-12-01

    Full Text Available INTRODUÇÃO: Os lábios superiores e inferiores representam as estruturas anatômicas funcionais e estéticas mais importantes do segmento inferior da face. Além disso, possuem funções complexas, sendo a reconstrução de defeitos labiais um desafio ao cirurgião plástico. MÉTODO: Trinta pacientes apresentando defeitos de espessura total do lábio inferior foram submetidos a reconstrução do lábio baseada na extensão dos defeitos após exérese tumoral. RESULTADOS: Seis (20% pacientes apresentavam lesões de até 30% da superfície total do lábio, sendo realizado fechamento primário. Dezoito (60% pacientes apresentavam lesões de 30% a 80% da superfície total do lábio inferior, sendo realizado retalho miomucoso de vermelhão; em 14 desses pacientes, em decorrência da perda cutânea associada à ressecção, foi associado retalho cutâneo mentolabial. Cinco (16,6% pacientes tinham lesões no lábio inferior e comissura oral adjacente, sendo submetidos a reconstrução pela técnica de Abbé-Estlander com retalho miomucoso associado ao retalho cutâneo mentolabial. Um (3,5% paciente apresentou lesão de 90% da superfície total do lábio inferior, sendo empregada técnica de Webster-Bernard associada ao retalho de língua. CONCLUSÕES: Neste artigo é apresentada, de forma simplificada, sistemática e baseada na literatura, uma estratégia para planejamento da reconstrução do lábio inferior com utilização de técnicas eficazes e reprodutíveis em ambiente de aprendizado de médicos residentes, para tratamento de lesões complexas do lábio inferior, baseadas na extensão da perda de tecidos apresentada pelo paciente, com adequados resultados estético-funcionais.BACKGROUND: The upper and lower lips represent the most important functional and aesthetic anatomical structures of the lower segment of the face. Given the complex functions of these structures, reconstruction of labial defects presents a challenge for plastic surgeons. METHODS: Thirty patients with full-thickness lower lip defects underwent lip reconstruction according to the extent of the defect after tumor resection. RESULTS: Six (20% patients presented lesions of up to 30% of the total lip surface that required primary closure. Eighteen (60% patients had lesions of 30-80% of the total area of the lower lip that were repaired using a myomucosal flap; in 14 of these patients, bilateral skin flaps were also used due to cutaneous involvement associated with the resection. Five (16.6% patients had lesions on the lower lip that were adjacent to the oral commissure; therefore, they underwent reconstruction using an Abbé-Estlander flap with a myomucosal flap and bilateral skin flaps. One (3.5% patient had a lesion covering 90% of the lower lip that was reconstructed using the Webster-Bernard technique and a tongue flap. CONCLUSIONS: Here, we present a simplified, systematic, and literature-based strategy for planning lower lip reconstructions that employs effective and reproducible techniques, which can be used for training resident physicians in the treatment of complex lower lip lesions according to the extent of tissue loss, thereby yielding appropriate aesthetic and functional results.

  4. Inferior Mesenteric Artery Aneurysm: Case Report and Literature Review

    OpenAIRE

    Edogawa, Seiji; Shibuya, Takashi; Kurose, Kimihiro; Sasaki, Kazuki; Tomita, Hirohiko

    2013-01-01

    An inferior mesenteric artery (IMA) aneurysm is the rarest among visceral artery aneurysms. A 69-year-old man was referred to our hospital with an asymptomatic IMA aneurysm associated with occlusion of the superior mesenteric artery (SMA) and celiac artery (CA). After revascularization of the SMA with an 8-mm expanded polytetrafluoroethylene (ePTFE) graft, the aneurysm was resected, and the IMA was reconstructed. The “jet disorder” phenomenon has been thought to cause an IMA aneurysm in the c...

  5. Recurrent Ascending Colon Cancer Manifesting as Inferior Vena cava Thrombus

    OpenAIRE

    Tori, Masayuki; Akamatsu, Hiroki; Ueshima, Shigeyuki; Tsujimoto, Masahiko; Nakahara, Masaaki

    2008-01-01

    We report an extremely rare case of recurrent ascending colon cancer manifesting as inferior vena cava (IVC) thrombus. A 77-year-old woman previously diagnosed with ascending colon cancer underwent right hemicolectomy with lymph node dissection. Though the tumor invaded the retroperitoneum and involved the right ovarian artery and vein, curative operation was performed. The patient took 5-FU p.o. Two and a half years later, tumor thrombus in the IVC extending into the right atrium was inciden...

  6. The history of an inferior good: Beer consumption in Germany

    OpenAIRE

    Volland, Benjamin

    2012-01-01

    The question whether alcohol in general, and different types of alcoholic beverages in particular (e.g., beer) are normal or inferior goods is a heavily disputed issue within economics and health research. Based on recently developed theories of preference adjustment this paper argues that the answer to this question may not be independent of the level of income itself. It therefore applies a gradual switching regression approach to aggregate beer consumption data in Germany from 1957 to 2007...

  7. Leiomiossarcoma da veia cava inferior: relato de caso

    Directory of Open Access Journals (Sweden)

    Rafael Lemos Nascif

    2014-12-01

    Full Text Available Relatamos um caso de paciente do sexo feminino, 48 anos, com quadro clínico de dor abdominal de moderada intensidade e abaulamento do abdome. Ao exame físico constatou-se massa abdominal palpável. A tomografia computadorizada mostrou volumosa massa retroperitoneal, com realce heterogêneo e íntima relação com a veia cava inferior. Realizou-se ressecção em bloco da massa e do segmento invadido da veia cava. A histologia revelou leiomiossarcoma.

  8. Aneurisma da artéria cerebelar ântero-inferior: relato de caso

    OpenAIRE

    Adorno Juan Oscar Alarcón; Andrade Guilherme Cabral de

    2002-01-01

    Os aneurismas intracranianos do sistema vértebro-basilar representam cerca de 5 a 10% de todos os aneurismas cerebrais. Os aneurismas da artéria cerebelar ântero-inferior (AICA) são considerados raros, podendo causar síndrome do ângulo ponto cerebelar, com ou sem hemorragia subaracnóidea. Desde 1948, foram descritos poucos casos na literatura. Apresentamos o caso de uma paciente, de 33 anos, na qual, após investigação de quadro de hemorragia subaracnóidea, diagnosticou-se aneurisma sacular da...

  9. Somatomotor and oculomotor inferior olivary neurons have distinct electrophysiological phenotypes

    OpenAIRE

    Urbano, Francisco J.; Simpson, John I.; Llinás, Rodolfo R.

    2006-01-01

    The electrophysiological properties of rat inferior olive (IO) neurons in the dorsal cap of Kooy (DCK) and the adjacent ventrolateral outgrowth (VLO) were compared with those of IO neurons in the principal olive (PO). Whereas DCK/VLO neurons are involved in eye movement control via their climbing fiber projection to the cerebellar flocculus, PO neurons control limb and digit movements via their climbing fiber projection to the lateral cerebellar hemisphere. In vitro patch recordings from DCK/...

  10. Sensibilidade do WRF à fronteira inferior e parametrizações urbanas

    OpenAIRE

    Teixeira, João Carlos Martins

    2012-01-01

    Ao longo dos anos avanços, na tecnologia de satélite viabilizaram a aquisição de informações sobre a superfície da Terra, tais como elevação e uso do solo, com grande detalhe e resolução. Esta informação pode ser incluída em modelos numérico da atmosfera, atualizando e dando-lhes mais detalhes sobre as condições de fronteira inferior. Assim sendo, este trabalho visa estudar a sensibilidade do Weather Research and Forecasting model a três conjuntos de dados de topografia, e dois de uso do solo...

  11. Inferior Pedicle Autoaugmentation Mastopexy After Breast Implant Removal

    OpenAIRE

    Hönig, Johannes; Frey, Hans; Hasse, Frank; Hasselberg, Jens

    2010-01-01

    A new method of autoaugmentation mammaplasty is presented to correct ptosis and to increase the projection and volume of the breast in patients who would like a reposition augmentation mammaplasty after breast implant removal but do not want a new implant.Between 1999 and 2007, a total of 27 patients (age = 54 ± 7.3 years) underwent mammaplasty using an inferior-based flap of deepithelialized subcutaneous and breast tissue modularized to its pedicle which was inserted beneath a superior pedic...

  12. Visual Modulation of Auditory Responses in the Owl Inferior Colliculus

    OpenAIRE

    Bergan, Joseph F; Knudsen, Eric I.

    2009-01-01

    The barn owl's central auditory system creates a map of auditory space in the external nucleus of the inferior colliculus (ICX). Although the crucial role visual experience plays in the formation and maintenance of this auditory space map is well established, the mechanism by which vision influences ICX responses remains unclear. Surprisingly, previous experiments have found that in the absence of extensive pharmacological manipulation, visual stimuli do not drive neural responses in the ICX....

  13. Optional inferior vena caval filters: where are we now?

    LENUS (Irish Health Repository)

    Keeling, A N

    2008-08-01

    With the advent of newer optional\\/retrievable inferior vena caval filters, there has been a rise in the number of filters inserted globally. This review article examines the currently available approved optional filter models, outlines the clinical indications for filter insertion and examines the expanding indications. Additionally, the available evidence behind the use of optional filters is reviewed, the issue of anticoagulation is discussed and possible future filter developments are considered.

  14. Evaluation of telemedicine systems for impacted third molars diagnosis

    Directory of Open Access Journals (Sweden)

    Duka Miloš

    2009-01-01

    Full Text Available Background/Aim. In the last twenty years significant advances have been made in the fields of information and telecommunication technology in health care applications, with a positive impact on the health care practice. The need for remote diagnosis and planning of interventions is of special importance in military health care, and health management of immobile persons, and those with special needs. In cases such as these, availability of specialist health care is mainly limited by geographic and financial factors. The aim of this study was to investigate practical usability of telemedicine approaches in everyday management of oral surgery patients in terms of reliability of established diagnosis and indications for oral surgery treatment of the third molars. Methods. Our experimental randomized study enrolled 432 randomly selected patients of both genders, aged 20 to 87 years, undergoing panoramic radiography for some reason in the Centre for Dental Radiography in Belgrade. In addition to radiography, photographs of the face and mouth cavity were taken. These images were uploaded to the web server specially dedicated to the study purposes, and then transmitted to teledentists, i.e. oral surgeons, who made remote diagnoses. Diagnostic agreement was determined by way of the Cohen's kappa coefficient, and diagnostic sensitivity (SE, specificity (SP, and effectiveness (EFF were also established. Statistical significance was determined and comparisons performed by using the z-test, and testing of non-parametric characteristics by using the McNemar's ?2 test for p = 0.05 significance cut-off. Results. The results obtained by analyzed images and diagnostic assessment of the clinical diagnosis (kappa = 0.99, SE = 99%, SP = 99%, EFF = 99%, for 95% CI indicate an almost complete diagnostic agreement. The differences in diagnosis were not statistically significant. Conclusion. Diagnostic assessment of the clinical diagnosis of impacted or semi-impacted third molars assisted by the telemedicine approach was equal to the real-time assessment of clinical diagnosis. Telemedicine, and teledentistry as its branch, represent the present and even more the future of this field of health care.

  15. Cauterização química das conchas nasais inferiores com ácido tricloroacético / Chemical cautery of the inferior turbinates with trichloroacetic acid

    Scientific Electronic Library Online (English)

    Alexandre Fernandes de, Azevedo; Dário Antunes, Martins; Caroline Guimarães, Cardoso; Itamar Fernando Cândido de, Moraes; Luciane Maria Pereira, Michel; Laura Hora Rios, Leite.

    2011-12-01

    Full Text Available INTRODUÇÃO: Obstrução nasal crônica secundária a hipertrofia das conchas nasais inferiores é um sintoma comum, de importante morbidade em nosso meio. Várias técnicas cirúrgicas são descritas para os casos refratários aos tratamentos clínicos, porém, há controversas sobre qual delas é a mais efetiva [...] e sujeita a menos complicações. OBJETIVO: Avaliar a eficácia, a segurança e exequibilidade do uso do ácido tricloroacético ambulatorial para o tratamento da hipertrofia dos cornetos inferiores. MÉTODO: Trabalho prospectivo com 29 pacientes que foram submetidos à técnica ambulatorial de infiltração de ácido tricloroacético a 30% submucosa dos cornetos inferiores, sob anestesia tópica. Foram avaliados os sintomas de rinorreia e obstrução nasal utilizando escala visual e analógica (EVA 010) pré cauterização e um ano pós procedimento. RESULTADOS: Diminuição significativa da obstrução nasal e da rinorreia um ano pós procedimento. As complicações foram sinéquias leves em dois pacientes e sangramentos, de pequena monta, em quatro casos com resolução espontânea. CONCLUSÃO: O método proposto apresentou ótimos resultados quanto à obstrução nasal e rinorreia, pode ser realizado em ambiente ambulatorial, e vem nos mostrando ser de baixa complicação Abstract in english INTRODUCTION: Chronic secondary nasal obstruction, the hypertrophy of the inferior turbinates is a common symptom of great morbidity in our society. Several surgical techniques are described to cases refractory to medical treatments, however, there are controversy about which one of them is more eff [...] ective and less subject to complications. OBJECTIVE: Evaluate the efficacy, security and practicability of using ambulatory trichloroacetic acid to treat the hypertrophy of the inferior turbinates. METHOD: Prospective study with 29 patients submitted to the ambulatory technique of 30% trichloroacetic acid infiltration in the inferior turbinate's submucosa, under topic anesthesia. The symptoms of rhinorrhea and nasal obstruction were evaluated using the analogical and visual scale (AVS 010) pre-cautery and one year post-procedure. RESULTS: Significant nasal obstruction and rhinorrhea reduction one year post-procedure. The complications were light synechia in two patients and small bleedings in four spontaneous resolution cases. CONCLUSION: The proposed method showed excellent results concerning nasal obstruction and rhinorrhea, can be conducted in ambulatory environment, and has proved to be a low-complication method.

  16. Origin of choriocarcinoma in previous molar pregnancy proved by DNA analysis

    International Nuclear Information System (INIS)

    A 17-year old woman had in a short time period (seven months) a very exciting reproduction history. Molar pregnancy in December 1993, choriocarcinoma in January 1994 and induced abortion in June 1994. DNA analysis proved the origin of the choriocarcinoma in the previous molar pregnancy. (author)

  17. Clinical treatment approach of a child with molar incisor hypomineralization (MIH) combined with malocclusion.

    OpenAIRE

    Rossitza Kabaktchieva; Vladimir Bogdanov

    2012-01-01

    Introduction. Molar incisor hypomineralization (MIH) was defined as "hypomineralisation of systemic origin of permanent first molars, frequently associated with affected incisors". MIH includes the presence of demarcated opacity, post eruptive enamel breakdown, atypical restoration. ?he approach to management suggested: risk identification, early diagnosis, remineralization for prevention of caries and post eruption breakdown, restorations. The clinicians very seldom notice that children with...

  18. Maxillary molar distalization with miniplates assessed on digital models : a prospective clinical trial

    DEFF Research Database (Denmark)

    Cornelis, Marie; De Clerck, Hugo J

    2007-01-01

    INTRODUCTION: The purpose of this prospective study was to evaluate the effects of maxillary molar distalization in patients treated with a miniplate skeletal anchorage system. METHODS: Thirty-one miniplates were placed on the infrazygomatic crests of 17 nongrowing patients consecutively selected for Class II treatment with skeletal anchorage. Three weeks after surgery, a 150-g force was applied to distalize the molars. No appliances were placed in the mandible. Models made before treatment and after molar distalization were scanned. Linear measurements were made on the digitized casts. Molar movement was measured on the superimposed maxillary arches before and after distalization, coregistered on the untreated mandibular models. RESULTS: A molar hyper Class I relationship was reached in all patients 7.0 +/- 2.0 months after miniplate loading. The maxillary molars were moved distally a mean distance of 3.27 +/- 1.75 mm. In patients without contact between the maxillary and the mandibular incisors, overjet decreased by 0.99 +/- 1.32 mm. Intermolar width increased by 2.78 +/- 1.38 mm. CONCLUSIONS: Maxillary molar distalization with miniplates for skeletal anchorage is an efficient, noncompliance-dependent, and predictable treatment modality for patients with Class II molar relationship.

  19. Management of early loss of first permanent molar: a new technique.

    Science.gov (United States)

    Rajashekhara, B S; Keyur, J M; Bhavna, D; Poonacha, K S

    2012-01-01

    The loss of a permanent first molar in adolescent patient creates a need for early space maintenance and restoration of function. To ascertain function and esthetics, immediate treatments include interim restorative approaches. This paper describes a conservative, functional and cost-effective bridge as an interim restoration after the loss of permanent first molar in an early adolescent dentition. PMID:23514691

  20. Management of early loss of first permanent molar: A new technique

    Directory of Open Access Journals (Sweden)

    B S Rajashekhara

    2012-01-01

    Full Text Available The loss of a permanent first molar in adolescent patient creates a need for early space maintenance and restoration of function. To ascertain function and esthetics, immediate treatments include interim restorative approaches. This paper describes a conservative, functional and cost-effective bridge as an interim restoration after the loss of permanent first molar in an early adolescent dentition.

  1. Functional approach to a Class II patient with upper first molar impaction

    Directory of Open Access Journals (Sweden)

    Giacomo D?Orlandi

    2014-01-01

    Full Text Available The lack of the left first molar maxillary and the left second molar maxillary, caused respectively by impaction and agenesis is a very rare case, which determines an important occlusal imbalance and asymmetrical mandible movement. A gnatologic and functional orthodontic approach were planned to improve the retrognathic mandible and the muscular activity using kinesiograph and electromyography.

  2. Periodontal healing after 'orthodontic extraction' of mandibular third molars: a retrospective cohort study.

    Science.gov (United States)

    Montevecchi, M; Incerti Parenti, S; Checchi, V; Palumbo, B; Checchi, L; Alessandri Bonetti, G

    2014-09-01

    In this study we investigated periodontal healing of mandibular second molars following 'orthodontic extraction' of adjacent impacted third molars, under the null hypothesis that there would be no difference in probing pocket depths (PPD) and clinical attachment levels (CAL) at the distal aspect of second molars before and after treatment. A retrospective survey was conducted of 64 patients who consecutively underwent 'orthodontic extraction' of mandibular third molars in close anatomical relationship with the mandibular canal from January 1997 to January 2011. Age, smoking habit, and PPD and CAL at the distal aspect of second molars before and after treatment were recorded. A statistically significant difference was found in PPD and CAL before and after treatment for the overall sample and for the sample classified by age (>25 or ?25 years), smoking habit (smoker or non-smoker), and type of third molar impaction (horizontal, mesioangular, or vertical). Median PPD and CAL reductions amounted to 6mm and 5mm, respectively. The null hypothesis was rejected and orthodontic extraction proved to be indicated for those impacted mandibular third molars at high risk of a postoperative periodontal defect at the distal aspect of the adjacent second molar. PMID:24774723

  3. Sublingual Traumatic Ulcerative Lesions Caused by the Eruption of First Primary Mandibular Molars: a Case Report / Lesión Ulcerativa Traumática Sublingual Causada por la Erupción del Primer Molar Temporal: Reporte de un Caso

    Scientific Electronic Library Online (English)

    Cassia Cilene, Dezan; Luiz Reynaldo de Figueiredo, Walter; Karin, Weber-Gasparoni; João Paulo Menck, Sangiorgio; Bruna, Nogari; Karen Barros Parron, Fernandes.

    2011-12-01

    Full Text Available La ulceración traumática de la superficie ventral de la lengua es una condición poco común en bebés y niños pequeños, la cual se asocia a menudo con los dientes natales y neonatales en los recién nacidos. El objetivo de este reporte es presentar un caso de úlceras bilaterales en la superficie ventra [...] l de la lengua causada por la erupción de los primeros molares mandibulares temporales en un infante de sexo masculino de 14 meses de edad. En niño fue capaz de señalar las lesiones y se negó a consumir ciertas bebidas y alimentos, lo que favoreció un diagnóstico precoz. El tratamiento clínico consistió en el suavizado manual de los bordes afilados de los primeros molares inferiores y un régimen casero de solución de clorhidrato de lidocaína (Xilocaína®, Astra) junto a la solución esteroidal de acetónido de triamcinolona (Omcilon - A, Brystol-Myers) para el alivio de los síntomas y curación de la lesión respectivamente. La curación completa de ambas lesiones y la alimentación normal se observó en una semana del control de seguimiento. La detección temprana de las lesiones y el cumplimiento de los padres con los regímenes caseros recomendados, son factores claves para un resultado exitoso del tratamiento, ya que los casos no tratados de estas lesiones ulcerosas pueden provocar dificultades en la alimentación y una evolución inadecuada. Aunque existen varios informes de lesiones ulcerosas en la lengua causada por la erupción dental, que se asocian generalmente con la erupción de los incisivos mandibulares temporales (enfermedad de Riga-Fede). Sin embargo, no existen informes de lesiones ulcerosas causadas por otros dientes temporales. Abstract in english Traumatic ulceration of the ventral surface of the tongue is an uncommon condition in infants and toddlers, which is often associated with natal and neonatal teeth in newborns. The aim of this report is to present a case of bilateral ulcerative ulcers on the ventral surface of the tongue caused by t [...] he eruption of first primary mandibular molars in a 14-month-old male child. The child was able to point to the lesions and also refused to consume certain beverages and foods, which favored an early diagnosis. Clinical treatment consisted of manual smoothing of the sharp edges of both mandibular first molars and a home regimen of lidocaine hydrochloride solution (Xylocaine®, Astra) and a steroid solution of triamcinolone acetonide (Omcilon ­ A, Brystol-Myers) for symptoms relief and lesion healing, respectively. Complete healing of both lesions and normal feeding were both observed at a one-week follow-up exam. Early detection of the lesions and parental compliance with recommended home regimens were key factors for a successful treatment outcome, since untreated cases of tongue ulcerative lesions may evoke feeding difficulties and failure to thrive. Although there are several reports of ulcerative lesions on the tongue caused by dental eruption, they are usually associated with the eruption of mandibular primary incisors (Riga-Fede disease). However, there are no reports of ulcerative lesions caused by other primary teeth.

  4. Resultados clínicos e satisfação dos pacientes após blefaroplastia inferior

    Directory of Open Access Journals (Sweden)

    Giovanni André Pires Viana

    2011-10-01

    Full Text Available OBJETIVO: Avaliar os resultados de cinquenta pacientes submetidos à blefaroplastia inferior transcutânea. MÉTODOS: Estudo prospectivo, randomizado e controlado realizado entre abril de 2005 e maio de 2007. Os pacientes foram alocados aleatoriamente em dois grupos: Grupo Cirúrgico 1 composto por 25 pacientes submetidos à blefaroplastia inferior tradicional e cantopexia lateral de rotina e Grupo Cirúrgico 2 composto por 25 pacientes submetidos à blefaroplastia inferior com transposição das bolsas adiposas e cantopexia lateral de rotina. Para avaliar os resultados obtidos foi utilizada a avaliação da autoestima dos pacientes, através da Escala de Autoestima de Rosenberg UNIFESP/ EPM. O outro método utilizado foi solicitar a participação de três cirurgiões independentes que avaliaram as fotografias de pré e pós-operatórios e com o auxílio de uma escala topográfica, quantificaram os resultados. RESULTADOS: A média de idade foi de 48,8 anos, com predomínio do sexo feminino (96%. A análise das fotografias mostrou que 96% dos pacientes apresentaram melhora significativa. A autoestima melhorou de um escore médio no pré-operatório de 5,1 (desvio padrão = 4,1 para um valor médio de 3,6 (desvio padrão = 3,5 seis meses após a operação (p = 0,001. CONCLUSÃO: Os autores concluíram que ambos os procedimentos seriam seguros e eficazes, com baixo indíce de complicação, apresentando melhora da autoestima, avaliada seis meses após a operação.

  5. Gaze holding after anterior-inferior temporal lobectomy.

    Science.gov (United States)

    Shaikh, Aasef G; Ghasia, Fatema F

    2014-11-01

    Eye position-sensitive neurons are found in parietooccipital and anterior-inferior temporal cortex. Putative role of these neurons is to facilitate transformation of reference frame from the retina-fixed to world-fixed coordinates and assure precise action. We assessed the nature of ocular motor disorder in a subject who had selective resection of the right anterior-inferior temporal cortex for the treatment of intractable epilepsy from cortical dysplasia. The gaze was stable when the subject was viewing straight-ahead, but centrally directed drifts in the eye position were seen during eccentric horizontal gaze holding. Eye-in-orbit position determined drift velocity and its direction. Conjugate and sinusoidal vertical oscillations were also present. Horizontal drifts and vertical oscillations became prominent and disconjugate in the absence of visual cue. The gaze-holding deficit was consistent with impairment in neural integration, but in the absence of cerebellar and visual deficits. We speculate that brainstem neural integrator might receive cortical feedback regarding world-fixed coordinates. Visual system might calibrate this process. Hence the lesion of the anterior-inferior temporal lobe leads to impairment in the function of neural integrator. Vision might be used to calibrate such feedback, hence the lack of visual cue further impairs the function of the neural integrator leading to worsening of gaze-holding deficits. PMID:24847963

  6. Bilateral catheterization of inferior petrosal sinous: Utility in Cushing syndrome

    International Nuclear Information System (INIS)

    The aim of this study is to present our experience on bilateral and simultaneous inferior petrous sinus catheterization, on those patients with ACTH -dependent Cushing's syndrome. We describe the procedure and our results. Material and Method: A retrospective study was held between January 2003 and September 2009, including nine patients (2 men, 7 women) presenting ACTH - dependent Cushing's syndrome. Simultaneous inferior petrosal sinus catheterization was performed in all of them, sampling basal ACTH and after CRH stimulation. ACTH levels gradient in different pituitary locations and peripheral blood levels was recorded. Diagnosis was suggested when inappropriate and maintained hypercortisolemia. High urinary free cortisol levels and no response to dexamethasone suppression were detected. Eight out of nine patients had a prior negative imaging test result. Results: Inferior petrosal sinus bilateral catheterization was successfully performed in all cases, with no evidence of further complications. The results showed definitive diagnosis in all cases. In four patients ACTH levels gradient was lateralized to the left, leading to a specific surgical approach. One patient presented pituitary ACTH - secreting adenoma. Two other patients showed ectopic ACTH production, one showed suprarenal adenoma secreting ACTH and other one showed response to pituitary stimulation without side lateralisation, presenting a histological diagnosis of pituitary hyperplasia. Conclusion: Petrosal sinus catheterization is shown to be an efficient procedure to manage Cushing's syndrome differential diagnosis and to obtain specific anatomical information.

  7. Iatrogenic mandibular fracture associated with third molar removal after mandibular angle osteotectomy.

    Science.gov (United States)

    Xu, Jia-Jie; Teng, Li; Jin, Xiao-Lei; Lu, Jian-Jian; Zhang, Chao

    2014-05-01

    The extraction of mandibular third molars is a common dental procedure. The complications include hemorrhage, pain, dental fracture, the displacement of teeth or fragments, iatrogenic damage or luxation of the second molar, neurologic injuries, soft tissue damage, subcutaneous emphysema, trismus, swelling, infection, and iatrogenic mandibular fracture. Fracture of the angle of the mandible associated with third molar removal is a rare but severe complication. This article describes a case of mandibular angle fracture associated with third molar extraction after mandibular angle osteotectomy, including a brief review of the literature. The removal of the mandibular angle and the outer cortex of the mandible, especially the external oblique ridge, may contribute to the bone fracture. We conclude that the extraction of the lower third molar must be before the removal of the mandibular angle, and a soft diet for at least 4 weeks postoperatively is essential to prevent late mandible fracture. PMID:24820729

  8. A exposição do contorno lateral direito da veia cava inferior na cirurgia hepática

    OpenAIRE

    Tenório Nailton Jatobá; Goldenberg Alberto; Triviño Tarcísio

    2002-01-01

    O conhecimento da relação entre a veia cava inferior e o tecido hepático é fundamental para a sua abordagem durante a cirurgia hepática. Observa-se na literatura dados contraditórios. Objetivo: Pesquisar a sintopia da veia cava inferior, o número de veias confluentes para o contorno direito e a distância do segmento retro-hepático da veia cava inferior. Métodos: Foram estudados 38 fígados humanos, entre 13 e 98 anos de ambos sexos. Obtida a peça anatômica, era dissecada a veia cava inferior, ...

  9. Extração de incisivo inferior: uma opção de tratamento Mandibular incisor extraction: a treatment option

    OpenAIRE

    Mardônio Rodrigues Pinto; Leandro Pereira Mottin; Carla D'Agostini Derech; Mônica Tirre de Souza Araújo

    2006-01-01

    A extração de incisivos inferiores pode ser considerada como opção de tratamento em casos de má oclusão Classe I com apinhamento inferior, principalmente quando é observada desproporção dentária entre a arcada superior e inferior; o que pode ser demonstrado através da análise de Bolton. Essa desproporção dentária, pode ocorrer devido à diminuição da largura dos dentes superiores ou aumento na largura dos dentes inferiores. Neste caso clínico, o tratamento de escolha, com extração de um incisi...

  10. Injury of the Inferior Alveolar Nerve during Implant Placement: a Literature Review

    OpenAIRE

    Gintaras Juodzbalys; Hom-Lay Wang; Gintautas Sabalys

    2011-01-01

    Objectives: The purpose of present article was to review aetiological factors, mechanism, clinical symptoms, and diagnostic methods as well as to create treatment guidelines for the management of inferior alveolar nerve injury during dental implant placement.Material and Methods: Literature was selected through a search of PubMed, Embase and Cochrane electronic databases. The keywords used for search were inferior alveolar nerve injury, inferior alveolar nerve injuries, inferior alveolar nerv...

  11. Use of opioid pain relievers following extraction of third molars.

    Science.gov (United States)

    Weiland, Breanna M; Wach, Anthony G; Kanar, Brent P; Castele, Matthew T; Sosovicka, Mark F; Cooke, Matthew R; Moore, Paul A

    2015-02-01

    Following extraction of third molars, it is common practice for oral and maxillofacial surgeons to provide a prescription for an opioid-containing analgesic such as hydrocodone with acetaminophen. Because the instructions for use most often indicate that these analgesics are to be taken "as needed for pain," it is unknown how many of the prescribed postoperative analgesic tablets are needed and actually taken. Therefore, an assessment of patient pain experiences and actual opioid analgesic usage was carried out using structured telephone interviews of patients performed 1 and 7 days following their thirdmolar extraction surgery. Forty-eight adolescents and young adults, ages 15 to 30 years, participated in this assessment. A review of the surgeon's notes indicated that the median number of prescribed opioid-containing analgesics (ie, Vicodin®, Norco®, Lorcet®, Percocet®) was 20 tablets (range 10 to 40). The median consumption during the first 24 hours was reported to be three tablets (range 0 to 10), and the total consumption for all 7 days was eight tablets (range 0 to 34). Four patients reported nausea or vomiting in the first 24 hours, and six patients reported nausea or vomiting during the following 6 days of recovery. The initial prescriptions provided adequate relief for 45 of the 48 patients. Higher consumption of opioid pain relievers (OPRs) was associated with a longer duration of surgery and the occurrence of postoperative infections. PMID:25822637

  12. Mass or molar? Recommendations for reporting concentrations of therapeutic drugs.

    Science.gov (United States)

    Jones, Graham R D; Bryant, Stewart; Fullinfaw, Robert; Ilett, Ken; Miners, John O; Morris, Raymond G; Doogue, Matthew P

    2013-04-15

    A working party (WP) from the Australasian Association of Clinical Biochemists, Australasian Society of Clinical and Experimental Pharmacologists and Toxicologists, Royal College of Pathologists of Australasia and Royal Australasian College of Physicians recommends the following: *mass units should be used for reporting therapeutic drug concentrations in Australia and New Zealand; and the litre (L) should be used as the denominator when expressing concentration. Examples of these units are mg/L and ?g/L Exceptions to these principles include: *drugs for which there is current uniformity of reporting and supporting information using molar units, notably lithium (mmol/L) and methotrexate (?mol/L); *drugs that are also present as endogenous substances, where the units used routinely should continue to be used. This applies to many substances, including minerals (eg, iron; ?mol/L), vitamins (eg, vitamin D; nmol/L) and hormones (eg, thyroxine; pmol/L). *drugs for which the denominator is not a 198 of fluid and there is international uniformity of reporting (eg, thiopurine metabolites; per 109 red blood cells). These recommendations relate to drugs that are used therapeutically, whether measured for therapeutic drug monitoring purposes or for assessment of overdose. Other substances, such as drugs of misuse, heavy metals or environmental toxins, were not considered by the WP and are thus not covered by this document. These recommendations should also be applied to other supporting documentation such as published guidelines, journal articles and websites. The implementation of these recommendations in New Zealand is subject to local confirmation. PMID:23581955

  13. Molar crown inner structural organization in Javanese Homo erectus.

    Science.gov (United States)

    Zanolli, Clément

    2015-01-01

    This contribution investigates the inner organizational pattern (tooth tissue proportions and enamel-dentine junction morphology) of seven Homo erectus permanent molar crowns from the late Lower-early Middle Pleistocene Kabuh Formation of the Sangiran Dome (Central Java, Indonesia). The previous study of their external characteristics confirmed the degree of time-related structural reduction occurred in Javanese H. erectus, and also revealed a combination of nonmetric features which are rare in the Lower and early Middle Pleistocene dental record, but more frequently found in recent humans. In accordance with their outer occlusal morphology, the specimens exhibit a set of derived internal features, such as thick to hyperthick enamel, an incomplete expression of the crest patterns at the enamel-dentine junction (EDJ) level, a sharp EDJ topography. As a whole, these features differ from those expressed in some penecontemporaneous specimens/samples representing African H. erectus/ergaster and H. heidelbergensis, as well as in Neanderthals, but occur in recent human populations. Further research in virtual dental paleoanthropology to be developed at macroregional scale would clarify the polarity and intensity of the intermittent exchanges between continental and insular Southeast Asia around the Lower to Middle Pleistocene boundary, as well as should shed light on the still poorly understood longitudinal evolutionary dynamics across continental Asia. PMID:25209431

  14. Morphology of the Physiological Apical Foramen in Maxillary and Mandibular First Molars / Morfología del Foramen Fisiológico Apical en Primeros Molares Maxilares y Mandibulares

    Scientific Electronic Library Online (English)

    J, Abarca; C, Zaror; H, Monardes; V, Hermosilla; C, Muñoz; M, Cantin.

    2014-06-01

    Full Text Available La información relacionada a la anatomía del foramen fisiológico apical es limitada. Conocer su diámetro y forma contribuye al trabajo clínico, específicamente en los procedimientos de limpieza y conformación del tercio apical. El objetivo de este estudio ex vivo fue determinar los diámetros menor, [...] mayor y la forma del foramen fisiológico apical en las raíces de primeros molares maxilares y mandibulares. Se realizó un estudio descriptivo sobre 89 primeros molares recientemente extraídos. Se seccionaron las raíces a 3­5 mm del ápice y fueron preparadas para su análisis bajo magnificación de 40X. Se midieron los diámetros mayor y menor de cada foramen fisiológico mediante el programa Motic Images plus 2.0 ML. La forma de los forámenes fue determinada de acuerdo a la diferencia entre diámetro mayor y menor, clasificándose como redondo, oval o irregular. Un total de 174 forámenes fisiológicos fueron analizados. El promedio del diámetro menor y mayor fue entre 0,24­0,33 mm en primeros molares maxilares y entre 0,25­0,33 mm en primeros molares mandibulares. En molares maxilares, la forma del foramen más común fue la oval (50%), luego irregular (32%) y redonda (18%). En molares mandibulares, la forma oval también fue la más frecuente (59%), seguida por la irregular (23%) y redonda (18%). Los hallazgos de este estudio en relación a morfología de los forámenes fisiológicos apicales en primeros molares, permite al operador facilitar la elección de instrumentos del calibre adecuado para realizar con éxito la terapia endodóntica. Abstract in english Information regarding the anatomy of the physiological apical foramen is limited. Knowing its diameter and shapes contributes to clinical work, specifically to the cleaning and shaping of the apical third. The aim of this ex vivo study was to determine the minimum and maximum diameters and shape of [...] the physiological apical foramen in the roots of maxillary and mandibular first molars. A descriptive study was conducted on 89 recently extracted first molars. Roots 3-5 mm from the apex were sectioned and prepared for analysis at 40x magnification. The minimum and maximum diameters of each physiological foramen were measured using the program Motic Images plus 2.0 ML. The shape of the foramina, classified as round, oval or irregular, was determined by the difference between the maximum and minimum diameters. A total of 174 physiological foramina were analyzed. The average of the minimum and maximum diameters was between 0.24-0.33 mm in maxillary first molars and between 0.25-0.33 mm in mandibular first molars. In maxillary molars, the most common shape of the foramen was oval (50%), then irregular (32%), then round (18%). In mandibular molars, the oval shape was also the most frequent (59%), followed by irregular (23%) and round (18%). The findings of this study regarding the morphology of physiological apical foramina in first molars make it easier for the operator to choose the appropriately-sized instruments to perform endodontic therapy successfully.

  15. Avaliação da quantidade de movimentação dos molares superiores com emprego do aparelho de Herbst / Assessment of the displacement of the upper molars using the Herbst appliance

    Scientific Electronic Library Online (English)

    Paulo Cezar Rodrigues, Ogeda; Jorge, Abrão.

    2004-08-01

    Full Text Available O Herbst é um aparelho ortopédico funcional fixo destinado principalmente ao estímulo de crescimento mandibular durante a correção da má oclusão de Classe II esquelética de pacientes em crescimento. Várias publicações descreveram os efeitos deste aparelho durante a correção da Classe II, revelando a [...] promoção de alterações esqueléticas e dentárias em igual proporção, favorecendo sua correção. Parte do movimento dentário ocorre por distalização dos primeiros molares superiores. Esta pesquisa teve como objetivo avaliar a quantidade e o tipo de movimento distal ocorrido com os primeiros molares superiores permanentes, e a conseqüência destes movimentos sobre o plano oclusal funcional durante o período de utilização do aparelho de Herbst. A amostra foi composta de 22 pacientes portadores da má oclusão de classe II esquelética, retrognatismo mandibular, com idade média de 12 anos e 11 meses, tratados por um período médio de 10,1 meses. Os aparelhos foram construídos utilizando a ancoragem total no arco maxilar, visando potencializar a ação ortopédica e minimizar a perda de ancoragem. As alterações foram medidas em cefalogramas específicos obtidos das telerradiografias em norma lateral tomadas em dois tempos: tempo 1 (T1) antes da instalação do aparelho, e tempo 2 (T2), após sua remoção. Medidas cefalométricas lineares e angulares em relação ao plano horizontal de Frankfurt, plano palatino e a uma linha vertical de referência a partir do ponto S perpendicular a Frankfurt, foram utilizadas para quantificar os deslocamentos dos primeiros molares superiores. Foram avaliados: o deslocamento distal médio das coroas, o deslocamento distal médio de suas raízes, a conseqüente inclinação no longo eixo dos molares durante a distalização, o deslocamento vertical em relação ao plano palatino, e finalmente, a conseqüência da variação vertical do primeiro molar sobre o plano oclusal funcional. Os mostraram distalização molar em todos os casos, em média a distalização das coroas foi de 1,6 mm e a distalização de raízes, média 1,1 mm. A intrusão média foi de 0,8 mm em relação ao plano palatino, com a inclinação distal média dos molares de 2,6º, alterações significante estatisticamente. O plano oclusal apresentou inclinação no sentido horário em relação ao plano horizontal de Frankfurt de 2,5º, em média. Concluimos que o aparelho de Herbst é capaz de promover distalização e intrusão dos primeiros molares superiores. Abstract in english The Herbst appliance is an orthopedic fixed device for treatment of class II malocclusion mainly directed to mandibular growth stimulation in growing patients. Several papers have described its effects during the Class II correction, showing it´s dental and skeletic action occuring in the same propo [...] rtion. Part of the dental movement is upper molar distalization. This search had the objective of assessing the kind and amount of first upper molar movement using the Herbst appliance. The sample was composed by 22 skeletal Class II young patients, mean age 12 years 11 months, treated during a period of 10,1 month. The Herbst was constructed using the total anchorage method on the maxillary arch. Lateral cephalometric analysis was used joining linear and angular mesurements in two ocasions: T1, before tretment, and T2 after the appliance had been removed. The refference lines used to compare the points located in the upper molar were the horizontal Frankfurt an S perpendicular throw Frankfurt. The results showed significant distal movement of the molar crown and root while the oclusal surface was intruded in comparing to palatal plane. In consequence the occlusal plane rotated in relation to Frankfurt. Our conclusion is that the Herbst appliance is able to promote molar distalization and molar intrusion on the upper arch.

  16. Síndrome de compresión de vena cava inferior secundario a fibrosis retroperitoneal / Inferior vena cava compression syndrome secondary to retroperitoneal fibrosis

    Scientific Electronic Library Online (English)

    Alberto, Miranda Bravo; Milagros I, Collazo-Ramos; Asbel Vicente, de la Cruz; Digna, Chávez Jiménez.

    2010-09-01

    Full Text Available Se estudió un paciente de 57 años de edad, de tez negra, con edemas en miembros inferiores relevantes por su volumen y extensión. Se realizó la discusión clínica la cual orientó hacia la búsqueda de una lesión o tumor retroperitoneal asociado a un síndrome de compresión u obstrucción de vena cava in [...] ferior y se comprobó imagenológicamente. La confirmación histológica se obtuvo por vía quirúrgica. Abstract in english We studied a 57 year-old patient of black complexion, with swelling of the lower limbs which was relevant due to its mass and extension. The clinical discussion guided us to search for a lesion or retroperitoneal tumor associated with a compression syndrome or obstruction of the inferior vena cava, [...] which was determined radiologically. Histological confirmation was obtained through surgery.

  17. Ruptura del ligamento tibioperoneo inferior posterior en un niño / Tear of the posterior-inferior tibiofibular ligament in a child

    Scientific Electronic Library Online (English)

    M, Olalde-Hernández; MA, Arceo-G; L, Viveros-Arceo; J, Milán-Nava.

    2014-04-01

    Full Text Available Las fracturas-luxación del tobillo son muy frecuentes en los adultos y las lesiones descritas por Salter y Harris en pacientes en desarrollo también son comunes. Los autores presentan un caso de ruptura del ligamento tibio-peroneo inferior posterior en el tobillo izquierdo, en un paciente de 13 años [...] de edad, cuyo diagnóstico inicial en radiografías simples fue de esguince de tobillo; sin embargo, se solicitó una TC del tobillo en donde se corroboró la lesión de este paciente tratado en el Hospital Infantil de Morelia. La TC como elemento de apoyo en el diagnóstico de la diástasis tibio-peronea inferior es de gran ayuda pues la ruptura del ligamento tibio-peroneo distal posterior de la mortaja en el tobillo pasa desapercibida en estos pacientes que son diagnosticados inicialmente como esguinces de tobillo. Abstract in english Fracture-dislocations of the ankle are very frequent in adults. The injuries described by Salter and Harris in developing patients are also common. The authors present a case of tear of the posterior-inferior tibiofibular ligament of the left ankle in a 13 year-old patient. The initial diagnosis wit [...] h plain X-rays was ankle sprain; however, an ankle CT scan confirmed the patient's injury and he was treated at Morelia's Children's Hospital. CT scan is an extremely useful aid in diagnosing inferior tibiofibular diastasis because the tear of the posterior distal tibiofibular ligament of the ankle mortise is missed in these patients, who initially are diagnosed as having an ankle sprain.

  18. Magnetic Resonance Imaging Demonstrates Neuropathology in Congenital Inferior Division Oculomotor Palsy

    OpenAIRE

    Wu, Tzu-en J.; Isenberg, Sherwin J; Joseph L Demer

    2006-01-01

    Isolated inferior division oculomotor nerve palsy (ONP) is rare. Acquired cases have been associated with neurologic or systemic disease. To our knowledge, congenital inferior division ONP is previously unreported. We present a case of congenital inferior division ONP in which magnetic resonance imaging demonstrated the structural neuropathy.

  19. Colgajos de perforantes de las arterias epigástricas inferiores profunda y superficial Deep and superficial inferior epigastric artery perforator flaps

    Directory of Open Access Journals (Sweden)

    A. R. Gagnon

    2006-12-01

    Full Text Available Con el desarrollo de los colgajos miocutáneos de recto abdominal (TRAM, el abdomen inferior ha sido reconocido como la principal área dadora de tejidos autólogos de alta calidad, especialmente útiles en reconstrucción mamaria. Más recientemente la habilidad para obtener componentes adiposocutáneos similares sin sacrificar el músculo recto ha revolucionado el campo de la Cirugía Reconstructiva. El advenimiento de los colgajos de perforantes ha permitido a los cirujanos plásticos lograr los mismos buenos resultados estéticos que con los colgajos miocutáneos tradicionales, pero con un considerable descenso en la morbilidad del área donante. Con los colgajos de perforantes de la arteria epigástrica inferior profunda (DIEP y de la arteria epigástrica inferior superficial (SIEA, los pacientes han incrementado sus opciones de reconstrucción. Este artículo revisa la anatomía quirúrgica de la pared abdominal relativa a los colgajos SIEA y DIEP. Se explican detalladamente los pasos principales para la preparación preoperatoria, la técnica quirúrgica y los cuidados postoperatorios. Se discuten las ventajas y desventajas y se presen- tan los trucos técnicos que pueden ayudar a mejorar el resultado final. Además se ilustran con ayuda de casos clínicos las indicaciones típicas y atípicas.Following the development of the transverse rectus abdominis myocutaneous (TRAM flap, the lower abdomen has been recognized as a prime source of high quality autogenous tissue, especially useful in breast reconstruction. More recently, the ability to harvest a similar adipocutaneous component without sacrifice of the rectus muscle has revolutionized the field of reconstructive surgery. The advent of perforator flaps has allowed plastic surgeons to achieve the same highly esthetic results as with the former myocutaneous flaps while significantly decreasing the donor site morbidity. With the deep inferior epigastric artery perforator (DIEP flap and the superficial inferior epigastric artery (SIEA flap becoming more mainstream, patients are increasingly seeking these reconstructive options. This article reviews the surgical anatomy of the abdominal wall as related to the SIEA and DIEP flaps. Key steps of preoperative preparation, operative technique and postoperative care are explained in details. Specific advantages and disadvantages are discussed and technical tips are presented to help improve final outcome. In addition, typical and atypical indications are illustrated with the use of clinical cases.

  20. Colgajos de perforantes de las arterias epigástricas inferiores profunda y superficial / Deep and superficial inferior epigastric artery perforator flaps

    Scientific Electronic Library Online (English)

    A. R., Gagnon; P. N., Blondeel.

    2006-12-01

    Full Text Available Con el desarrollo de los colgajos miocutáneos de recto abdominal (TRAM), el abdomen inferior ha sido reconocido como la principal área dadora de tejidos autólogos de alta calidad, especialmente útiles en reconstrucción mamaria. Más recientemente la habilidad para obtener componentes adiposocutáneos [...] similares sin sacrificar el músculo recto ha revolucionado el campo de la Cirugía Reconstructiva. El advenimiento de los colgajos de perforantes ha permitido a los cirujanos plásticos lograr los mismos buenos resultados estéticos que con los colgajos miocutáneos tradicionales, pero con un considerable descenso en la morbilidad del área donante. Con los colgajos de perforantes de la arteria epigástrica inferior profunda (DIEP) y de la arteria epigástrica inferior superficial (SIEA), los pacientes han incrementado sus opciones de reconstrucción. Este artículo revisa la anatomía quirúrgica de la pared abdominal relativa a los colgajos SIEA y DIEP. Se explican detalladamente los pasos principales para la preparación preoperatoria, la técnica quirúrgica y los cuidados postoperatorios. Se discuten las ventajas y desventajas y se presen- tan los trucos técnicos que pueden ayudar a mejorar el resultado final. Además se ilustran con ayuda de casos clínicos las indicaciones típicas y atípicas. Abstract in english Following the development of the transverse rectus abdominis myocutaneous (TRAM) flap, the lower abdomen has been recognized as a prime source of high quality autogenous tissue, especially useful in breast reconstruction. More recently, the ability to harvest a similar adipocutaneous component witho [...] ut sacrifice of the rectus muscle has revolutionized the field of reconstructive surgery. The advent of perforator flaps has allowed plastic surgeons to achieve the same highly esthetic results as with the former myocutaneous flaps while significantly decreasing the donor site morbidity. With the deep inferior epigastric artery perforator (DIEP) flap and the superficial inferior epigastric artery (SIEA) flap becoming more mainstream, patients are increasingly seeking these reconstructive options. This article reviews the surgical anatomy of the abdominal wall as related to the SIEA and DIEP flaps. Key steps of preoperative preparation, operative technique and postoperative care are explained in details. Specific advantages and disadvantages are discussed and technical tips are presented to help improve final outcome. In addition, typical and atypical indications are illustrated with the use of clinical cases.

  1. Computed tomographic evaluation of the renal vein and inferior vena cava in renal cell carcinoma

    International Nuclear Information System (INIS)

    Renal cell carcinoma not rarely invades the renal vein and inferior vena cava with formation of tumor thrombus. On the other hand, congenital anomalies of these venous channels are occasionally encountered. At the time of surgery of renal cell carcinoma, therefore, preoperative evaluation of the renal vein and inferior vena cava is desirable. In 22 cases of renal cell carcinoma treated at the Jikei University Hospital during 16 months period from Jan. 1979 to apr. 1980, the ranal vein and inferior vena cava were examined by computed tomography (CT). Intravenous tumor thrombus was diagnosed in 4, double inferior vena cava in one and retroaortic left renal vein in one. All these CT diagnosis were confirmed to be correct by surgery. Three of tumor thrombus cases showed involvement of inferior vena cava. CT findings included dilated vein in 4 and filling defect after contrast enhancement in 2. In double inferior vena cava, CT at the level of the upper pole of kidney showed the left inferior vena cava traversing in front of the aorta and conjoining the left inferior vena cava, CT at the level of renal vein the left renal vein draining into the left inferior vena cava and CT at the lower level two round inferior vena cava with the aorta between them. It was a diagnostically useful finding that the left inferior vena cava was markedly stained in CT after contrast enhancement jestas the aorta and the right inferior vena cava. In retroaortic left renal vein, CT showed the left renal vein running behind the aorta and draining into the inferior vena cava. Preoperative information on congenital anomalies of the renal vein and inferior vena cava or tumor thrombus and its extension are very important particularly for radical surgery to be conducted safely without postoperative complications. Computed tomography is quite useful in evaluation of morbid state of the renal vein and inferior vena cava. (author)

  2. Influência da temperatura, da massa molar e da distribuição de massa molar na tensão superficial de PS, PP e PE: experimento e teoria

    Directory of Open Access Journals (Sweden)

    Moreira José C.

    2003-01-01

    Full Text Available Neste trabalho a influência da temperatura, da massa molar (n e da distribuição de massa molar (MWD na tensão superficial de poliestireno (PS foi avaliada utilizando o método da gota pendente. A influência da temperatura na tensão superficial de polipropileno isotático (i-PP e de polietileno de baixa densidade (PELBD também foi estudada aqui. As teorias de Patterson-Rastogi e Dee-Sauer foram utilizadas em conjunção com a teoria de equação de estado de Flory, Orwoll, e Vrij (FOV para prever a tensão superficial (gama utilizando dados de pressão-volume-temperatura (PVT dos polímeros. Ambas teorias prevêem que a tensão superficial diminui linearmente com o aumento da temperatura e aumenta com a massa molar concordando com os resultados experimentais. Entretanto, ambas teorias subestimam a mudança de entropia de formação de superfície por unidade de área a volume constante para sistemas poliméricos de baixa massa molar e polidisperso e subestimam o efeito da distribuição de massa molar na tensão superficial

  3. Predicting lower third molar eruption on panoramic radiographs after cephalometric comparison of profile and panoramic radiographs

    DEFF Research Database (Denmark)

    Begtrup, Anders; GrØnastØð, Halldis Á

    2012-01-01

    Previous studies have suggested methods for predicting third molar tooth eruption radiographically. Still, this prediction is associated with uncertainty. The aim of the present study was to elucidate the association between cephalometric measurements on profile and panoramic radiographs and to find a simple and reliable method for predicting the eruption of the mandibular third molar by measurements on panoramic radiographs. The material consisted of profile and panoramic radiographs, taken before orthodontic treatment, of 30 males and 23 females (median age 22, range 18-48 years), with no known diseases. Cephalometric measurements on panoramic and profile radiographs were performed and compared, i.e. the size of the gonial angle and sagittal distance from the alveolar margin between the mandibular central incisors to the anterior border of the mandibular ramus. Furthermore, the mesiodistal width of the second molar was measured. Statistical methods included analysis of method error. The probability of eruption was modelled using logistic regression analysis. Correlation was observed between all measurements on profile and panoramic radiographs. The skeletal variable expressing the length from the ramus to the incisors (olr-id) showed a statistically significant correlation. By combining this length with the mesiodistal width of the lower second molar, the prediction of eruption of the lower third molar was strengthened. A new formula for calculating the probability of eruption of the mandibular third molar was made and a graph constructed for easy assessment. In conclusion, a simple method for predicting the eruption of the third molar is presented.

  4. Apparent molar volumes and compressibilities of electrolytes and ions in ?-butyrolactone

    International Nuclear Information System (INIS)

    Highlights: ? Density and speed of sound for salts solutions in ?-butyrolactone were measured. ? The apparent molar volumes and compressibilities have been determined. ? The limiting molar quantities are split into independent ionic contributions. ? These data are used to describe ion–solvent interactions. - Abstract: The densities of tetraphenylphosphonium bromide, sodium tetraphenylborate, lithium perchlorate, sodium perchlorate and lithium bromide in ?-butyrolactone at (288.15, 293.15, 298.15, 303.15, 308.15 and 313.15) K and speed of sound at 298.15 K have been measured. From these data apparent molar volumes V? at (288.15, 293.15, 298.15, 303.15, 308.15 and 313.15) K and the apparent molar isentropic compressibility KS,?, at T = 298.15 K of the salts have been determined. The apparent molar volumes and the apparent molar isentropic compressibilities were fitted to the Redlich, Rosenfeld and Mayer equation as well as to the Pitzer and Masson equations yielding infinite dilution data. The obtained limiting values have been used to estimate the ionic data of the standard partial molar volume and the standard partial isentropic compressibility in ?-butyrolactone solutions.

  5. Growth and treatment changes distal to the mandibular first molar: a lateral cephalometric study.

    Science.gov (United States)

    Sable, Daniel L; Woods, Michael G

    2004-06-01

    This study examined space changes occurring distal to the mandibular first molar in growing patients treated using two different approaches. Two groups of 50 patients were selected for the study. The patients in group I were treated with the extraction of mandibular second premolars, whereas those in group II were treated without mandibular premolar extractions, by holding E-spaces with utility arches. Lateral cephalograms taken before and after treatment were used to measure space changes within the mandible. Follow-up written treatment records and radiographs were also examined to ascertain whether the mandibular third molars were ultimately extracted or retained. A greater mean space increase between Xi point and the mandibular first molar was found in boys and girls treated with second premolar extractions. The mean space increase between Xi point and the mandibular first molar, as well as the average increase in total mandibular length, was greater in boys than in girls for both treatment modalities. This reflects a greater amount of growth in boys during the treatment period. The greater mean space increase in the groups treated with second premolar extractions could be attributed to the fact that the first molar generally moved further mesially during treatment in the extraction subjects, whereas in the E-space subjects, the first molars were perhaps held back. It was noted that the mandibular third molars were ultimately more likely to have been extracted in the E-space groups than in the second premolar extraction groups within this sample. PMID:15264649

  6. Preliminary experimental study of retrievable nitinol inferior vena cava filter

    International Nuclear Information System (INIS)

    Objective: To evaluate, in vitro and in an animal model together with the placement, stability, clot capturing efficacy, retrieval and safety of a new non-invasive retrievable nitinol inferior vena cava filter (RNIVCF) for temporary or permanent use. Methods: RNIVCF were made by wrapping nitinol monofilament wire on a steel mandrill to form a steric configuration. A 5-F Teflon sheath/dilator was taken for placement and retrieval. In vitro clots' trapping was assessed with size of 2.5/3/4-mm-diameter clots. Twenty adult mongrel dogs were used in this study. 2.5-mm-diameter homologous radiopaque clots (2.5-mm-HRC) were injected into IVC until the experimental animals die of acute pulmonary embolism (PE) and then to determine the minimum fatal quantity of clots in 8 dogs. RNIVCFs were introduced into the inferior vena cava in 12 dogs. For 10 animals, 10-ml 2.5-mm-HRC were injected below the filter to test its thrombus-trapping efficacy. The retrieval of filter was attempted on the 7th day after placement in two other dogs. Plain films of the abdomen and chest were made to document the effectiveness of the filter. Results: Initial experimental study showed that the RNIVCF functioned as intended. In vitro all 3 and 4-mm-diameter clots injected in the device simulating IVC flow was trapped by the filter. However, 95%-100% 2.5-mm-diameter clots were also captured by it. More than 10-ml 2.5-mm-HRC with once injection into IVC could cause the death of experimental animals due to acute PE in per-experiment. RNIVCF could be easily and successfully placed percutaneously in the inferior vena cava of the dogs through a 5-F sheath. The filter was accurately positioned in the inferior vena cava by moving the retrieval wire. All 13 RNIVCFs were placed in 12 dogs, one of those has double inferior vena cava and two filters were implanted. The filters trapped these 2.5-mm-diameter clots in the iliac veins of 8 dogs and none of them died of acute PE. But the initial two dogs with two original RNIVCF died of acute PE due to hypertension of the inferior vena cava below the filters caused by injecting too much clots to force the trapped clots passing through the filters. Therefore, only 10-ml clots was necessary for injection into each the IVC of the dogs and thus the stabilized portion of the original RNIVCF can change into three-petals-quincunx shape. Two filters were retrieved successfully through the sheath/dilator in the 7th day after placement without difficulty. Conclusion: RNIVCF is a kind of sophisticated device for retracting emboli. It can be sited percutaneously with 5F delivery permanently or temporarily in stable condition. The smooth contours cause no traumatic effect especially for retrieving small emboli

  7. First Permanent Molars and Dental Expenses: Should Pit and Fissure Sealants Be Used?

    Directory of Open Access Journals (Sweden)

    Legal G

    2000-12-01

    Full Text Available Aim: We attempted to assess the part care to the first permanent molars represents in total spending for dental care and to estimate the economic and medical advisability of using the pit and fissure sealing technique on the first permanent molars for the prevention of tooth decay. Method: We studied a representative sample of 2649 affiliates in the Nord – Pas-de-Calais and Picardie regions who were reimbursed for dental care on October 15, 1998. 54% of the patients in the sample (1437 were examined by a member of health care’s advisory dental staff. Results: The first permanent molars represent 28% of total reimbursed costs for care given to all the permanent teeth. 34% of all reimbursed conservative treatment for the first permanent molars concern patients under twenty years of age. In children aged 5 to 9 years who had reimbursed dental care, caries occurring on the occlusal side of the first permanent molars constitute 71% of all decayed or filled first molars. 47% of all patients in this age group have dental caries on the occlusal side of at least one permanent molar. 87% of their first molars present caries on the occlusal surface or have no tooth decay. We failed to find any correlation between dental decay on the occlusal surface and the socio-economic characteristics of the affiliates. Conclusion: All children between 5 and 9 years old do not require pit and fissure sealing for the prevention of dental caries on the occlusal surface of their first permanent molars. Before this technique is approved for reimbursement by health insurance, guidelines are needed for defining its indications.

  8. Características de los Canales Radiculares de Molares Temporales / Characteristics of Roots Canals of Deciduous Teeth

    Scientific Electronic Library Online (English)

    Esther, Vaillard Jiménez; Enrique, Huitzil Muñoz; Loida, Castillo Domínguez.

    2015-04-01

    Full Text Available El objetivo de esta investigacion fue identificar en los canales radiculares de la dentición temporal las variantes anatómicas de la cavidad dentaria pulpar. Se realizó un estudio clínico, descriptivo, transversal ex vivo, que analizó una muestra de 60 dientes temporales pertenecientes a niños mexic [...] anos aparentemente sanos, cuya extracción se indicó por motivos terapéuticos. Los dientes fueron almacenados en agua destilada y posteriormente diafanizados. La identificación de canales radiculares se realizó por un solo observador durante dos ocasiones (k= 0,7947). Los dientes unirradiculares presentaron 50% de canales simples y laterales, 25% secundarios y 25% deltas. Los molares maxilares presentaron un 8% de canales simples en cada raíz, mientras que los molares mandibulares un 29%. Canales secundarios, paralelos y recurrentes se observaron en el 33% de los molares. El 100% de las raíces distales de molares mandibulares presentaron canales reticulares. Las fusiones radiculares se presentan en el 88% de las molares mandibulares. La anatomía de los canales radiculares de la dentición temporal es altamente compleja. Abstract in english The aim of this study was to identify in roots canals of deciduous teeth anatomical variants in pulpar cavity. In a clinical, descriptive, cross sectional ex vivo study was analyzed a sample of 60 deciduous teeth of healthy Mexican children. Each tooth was conserved in distillated water and were tra [...] nsparency with a technic modified for deciduous teeth. Identifications of root canals was made twice by a lonely observant (k= 0.7947). Simple root teeth show 50% simple and lateral root canal, 25% secondary, 25% delta. Upper molars show 8% simple canal in each root. Lower molars 29%. Secondary root canals, parallel and recurrent were identified in 33% of cases. 100% of distal roots of lower molars have reticular canals. Root fusions are presents in 88% of lower molars. In conclusion, root canals anatomy of deciduous teeth is high complex.

  9. Inferior mesenteric artery aneurysm: case report and literature review.

    Science.gov (United States)

    Edogawa, Seiji; Shibuya, Takashi; Kurose, Kimihiro; Sasaki, Kazuki; Tomita, Hirohiko

    2013-01-01

    An inferior mesenteric artery (IMA) aneurysm is the rarest among visceral artery aneurysms. A 69-year-old man was referred to our hospital with an asymptomatic IMA aneurysm associated with occlusion of the superior mesenteric artery (SMA) and celiac artery (CA). After revascularization of the SMA with an 8-mm expanded polytetrafluoroethylene (ePTFE) graft, the aneurysm was resected, and the IMA was reconstructed. The "jet disorder" phenomenon has been thought to cause an IMA aneurysm in the case of CA and SMA obstruction. We consider it better to revascularize not only an IMA but also an SMA or CA for preventing that phenomenon. PMID:23641294

  10. Superior and inferior vena cavae: Embryology, variants, and pathology

    International Nuclear Information System (INIS)

    The superior and inferior venae cavae may be involved in a host of disease processes. Knowledge of the normal anatomy and variants of these structures is valuable in interpreting plain films and the results of angiographic procedures and all cross-sectional modalities. The authors review the embryology of venae cavae and proceed to describe their normal anatomy and variants. An awareness of the variants can prevent mistaking variants for pathologic processes. Finally, the authors describe pathology involving these vessels and demonstrate the radiographic manifestations

  11. Non syndromic bilateral microdontia of maxillary second molars: a very rare finding.

    Science.gov (United States)

    Hans, Manoj Kumar; Chander, Subhash; Ahluwalia, Amrit Singh; Chinna, Harleen

    2015-04-01

    Dental anomalies are the formative defects caused by genetic disturbances or environmental factors during tooth morphogenesis. The term microdontia is defined as the condition of having abnormally small teeth. Clinically, microdontia in the permanent dentition, excluding the third molars, is found in 0.8-8.4% of the population. One of the commonest forms of localized microdontia is that which affects the maxillary lateral incisor, a condition called Peg laterals. The next tooth which can be affected is the third molars. Few cases of microdontia in canines have been reported. Localised microdontia of maxillary second molar has never been reported in literature before. PMID:26023663

  12. Endodontic management of maxillary first molar with type I canal configuration- a rare case report.

    Science.gov (United States)

    Desai, Niranjan; Jadhav, Ganesh Ranganath; Raghavendra, Srinidhi Surya; Mittal, Priya; Patil, Gururaj

    2015-04-01

    Thorough knowledge about the root canal variations is essential for the predictable endodontic treatment outcome. The root and root canal anatomy of maxillary first molar varies greatly. A Pub-med literature search about single rooted single canalled maxillary first molar was done to know its details such as incidence, diagnostic method used, age, sex and ethnic background of patient. This article presented report of a single rooted single canalled maxillary first molar in a 27-year-old healthy Asian female. PMID:26023655

  13. Endodontic Management of Maxillary First Molar with Type I Canal Configuration– A Rare Case Report

    Science.gov (United States)

    Desai, Niranjan; Raghavendra, Srinidhi Surya; Mittal, Priya; Patil, Gururaj

    2015-01-01

    Thorough knowledge about the root canal variations is essential for the predictable endodontic treatment outcome. The root and root canal anatomy of maxillary first molar varies greatly. A Pub-med literature search about single rooted single canalled maxillary first molar was done to know its details such as incidence, diagnostic method used, age, sex and ethnic background of patient. This article presented report of a single rooted single canalled maxillary first molar in a 27-year-old healthy Asian female. PMID:26023655

  14. Two-Rooted Maxillary First Molars with Two Canals: A Case Series

    Directory of Open Access Journals (Sweden)

    Seddigheh Gholizadeh

    2013-01-01

    Full Text Available Thorough understanding of the anatomic and internal morphology of a root canal system is absolutely essential for the success of endodontic treatment. Since permanent maxillary first molars have shown variation in internal anatomy, morphology, this tooth has been reviewed extensively. Presence of two canals in a two-rooted maxillary first molar has rarely been reported in studies describing tooth and root canal anatomies. In this report, three cases are presented, which involve the root canal treatment of maxillary first molars with fusion of the two buccal roots.

  15. Association between third mandibular molar impaction and degree of root development in adolescents

    DEFF Research Database (Denmark)

    Lauesen, Søren Rødsgaard; Andreasen, Jens O; Gerds, Thomas Alexander; Christensen, Søren Steno Ahrensburg; Borum, Mette; Hillerup, Søren

    2013-01-01

    Abstract Objective: To compare the root development and the growth rate of the mandibular third molar (M3 inf) in individuals where the M3 inf erupted vs individuals exhibiting M3 inf impaction. Materials and Methods: Serial standardized intraoral radiographs (Eggen technique) were taken annually of the mandibular third molar region from 132 subjects (71 male and 61 female) from 15 to 20 years of age. Based on the films, 264 lower third molars were classified into an eruption and an impaction gr...

  16. Agenesia del Tercer Molar en una Etnia Originaria del Norte de Chile: Aymaras / Third Molar Agenesis in Native Ethnia from North of Chile: Aymaras

    Scientific Electronic Library Online (English)

    Fernando, García-Hernández; Víctor Javier, Beltrán Varas.

    2009-03-01

    Full Text Available Agenesia es la ausencia de dientes por alteraciones genéticas aisladas o sindrómicas. La agenesia del tercer molar está asociada a malformaciones y es considerada por diversos autores consecuencia de la evolución humana (Larmour et al, 2005). Son los dientes con mayor prevalencia de agenesia junto c [...] on segundos premolares e incisivos laterales (Fuller & Denehy, 1984). La prevalen-cia varía entre 9% y 37% (McNamara & Foley, 2006), en tanto Arboleda et al. (2006) señalan una prevalencia del 20%. La literatura señala variables estadísticas porcentuales, por género, por arcada dentaria, por lado y por diente, con escasos artículos sobre grupos originarios de Chile. La población en estudio consistió en 78 individuos, 42 hombres y 36 mujeres, entre 18 y 40 años, de la etnia aymara, sin exodoncias del tercer molar ni tratamientos ortodónticos y sin malformaciones congénitas. Se determinó el grado de mestizaje mediante técnica sero lógica de hemo-aglutinación y por aplicación de la fórmula de Bernstein, que demostró 51% de mezcla indígena. A cada individuo se le tomó radiografía panorámica para observar presencia o ausencia de terceros molares. Se determinó un 21,79% de agenesia, con mayor porcentaje masculino. En la muestra total y en hombres hay mayor agenesia de terceros molares mandibulares, en cambio en mujeres existe igual porcentaje de agenesia en ambas arcadas. Predominan agenesias izquierdas, lo mismo se comprueba en el género masculino, mientras que en mujeres se comprueba igual porcentaje bilateral. Predomina la agenesia de un solo molar en ambos sexos. Nuestros resultados fueron comparados con atácamenos y con jóvenes antofagastinos y no se determinaron diferencias significativas al 95%, coincidiendo con lo señalado en la literatura. La investigación representa un aporte a la antropología del norte de Chile, pero considerando lo reducido de la muestra no es posible determinar variables étnicas. Abstract in english Agenesis is the absence of teeth by genetic alterations, single or as syndrome. Agenesis of third molar is associated to malformations and is considered by diverse authors a consequence of the human evolution (Larmour et al., 2005). The third molars together with second premolars and lateral incisor [...] s are the teeth with greater prevalence of agenesis (Fuller & Denehy, 1984). The prevalence varies between 9% and 37% (McNamara & Foley, 2006); Arboleda et al. (2006) indicated a prevalence of 20%. Literature indicate variable percentage, by gender, dental arches, side and tooth, with few articles on original groups of Chile. The population in study consisted in 78 cases, 42 men and 36 women between 18 and 40 years of the ethnic group of aymarás, without extractions of third molar nor orthodontic treatments and without congenital malformations. Hybridism was determined by means of serum technique by blood agglutination and by application of the formula of Bernstein, demonstrated a 51% of indigenous mixture. To each individual a panoramic x-ray was taken to observe presence or absence of third molars. A 21.79% of agenesis was determined, with greater percentage among males. Agenesis lower third molar predominates in the sample and in men; however in women are greater agenesis upper third molar. In addition, agenesis predominates of the left side in both sexes, while in men equal bilateral percentage is verified. Agenesis of two molars predominates in both sexes. Our results be are compared with atácamenos and young people living in Antofagasta and statistical analyses did not show significant differences at the 95% level, and the results and, in general, agree with those in the literature. This research represents a contribution to the anthropology of the north of Chile, but it is not possible to determine ethnic variables considering the small sample in study.

  17. Obtenção da massa molar de asfaltenos através de osmometria de pressão de vapor Determination of the molar mass of asphaltenes using vapor pressure osmometry

    Directory of Open Access Journals (Sweden)

    Lyzette G. M. de Moura

    2009-01-01

    Full Text Available A massa molar é uma propriedade essencial na caracterização de asfaltenos e um dos principais parâmetros de entrada nos modelos para a predição da precipitação. Na literatura são relatadas massas molares entre 1000 e 10000 g.mol-1 para os asfaltenos, variando em função da técnica, natureza do petróleo, tipo de solvente e temperatura. Neste trabalho foi determinada a massa molar média numérica para dois asfaltenos em tolueno, o C7I (insolúveis em heptano e o C5I (insolúveis em pentano através da osmometria de pressão de vapor. Os dados experimentais foram avaliados levando em consideração efeitos da agregação dos asfaltenos em solução e sua maior dispersão em baixas concentrações. Foram feitos ainda ajustes matemáticos respeitando a tendência das curvas para diluições infinitas buscando produzir melhores resultados no valor da massa molar. Os valores obtidos foram comparados com os métodos convencionais aplicados à análise da osmometria de pressão de vapor, e situaram-se entre 3200 e 5200 g.mol-1 para o asfaltenos C5I e entre 4100 e 5400 g.mol-1 para o C7I.Molar mass is an essential property for the characterization of asphaltenes and one of the main input parameters in the models for the prediction of the precipitation. In the literature molar masses between 1,000 and 10,000 g.mol-1 for the asphaltenes are quoted, depending on the technique, petroleum origin, solvent nature and temperature. In this work the numerical average molar mass for two asphaltenes in toluene, the C7I (insoluble in heptane and the C5I (insoluble in pentane, was determined by vapor pressure osmometry. The experimental data were evaluated taking into account effects of asphaltenes aggregation in solution and its larger dispersion at low concentrations. Mathematical fittings were also made to comply with the curve bias for infinite dilutions, which was aimed at finding more accurate values for the molar mass. The results found were compared with the conventional methods applied to the analysis of the vapor pressure osmometry and varied from 3,200 to 5,200 g.mol-1 for the C5I asphaltenes and from 4,100 to 5,400 g.mol-1 for C7I.

  18. Obtenção da massa molar de asfaltenos através de osmometria de pressão de vapor / Determination of the molar mass of asphaltenes using vapor pressure osmometry

    Scientific Electronic Library Online (English)

    Lyzette G. M. de, Moura; Antonio Carlos S., Ramos.

    Full Text Available A massa molar é uma propriedade essencial na caracterização de asfaltenos e um dos principais parâmetros de entrada nos modelos para a predição da precipitação. Na literatura são relatadas massas molares entre 1000 e 10000 g.mol-1 para os asfaltenos, variando em função da técnica, natureza do petról [...] eo, tipo de solvente e temperatura. Neste trabalho foi determinada a massa molar média numérica para dois asfaltenos em tolueno, o C7I (insolúveis em heptano) e o C5I (insolúveis em pentano) através da osmometria de pressão de vapor. Os dados experimentais foram avaliados levando em consideração efeitos da agregação dos asfaltenos em solução e sua maior dispersão em baixas concentrações. Foram feitos ainda ajustes matemáticos respeitando a tendência das curvas para diluições infinitas buscando produzir melhores resultados no valor da massa molar. Os valores obtidos foram comparados com os métodos convencionais aplicados à análise da osmometria de pressão de vapor, e situaram-se entre 3200 e 5200 g.mol-1 para o asfaltenos C5I e entre 4100 e 5400 g.mol-1 para o C7I. Abstract in english Molar mass is an essential property for the characterization of asphaltenes and one of the main input parameters in the models for the prediction of the precipitation. In the literature molar masses between 1,000 and 10,000 g.mol-1 for the asphaltenes are quoted, depending on the technique, petroleu [...] m origin, solvent nature and temperature. In this work the numerical average molar mass for two asphaltenes in toluene, the C7I (insoluble in heptane) and the C5I (insoluble in pentane), was determined by vapor pressure osmometry. The experimental data were evaluated taking into account effects of asphaltenes aggregation in solution and its larger dispersion at low concentrations. Mathematical fittings were also made to comply with the curve bias for infinite dilutions, which was aimed at finding more accurate values for the molar mass. The results found were compared with the conventional methods applied to the analysis of the vapor pressure osmometry and varied from 3,200 to 5,200 g.mol-1 for the C5I asphaltenes and from 4,100 to 5,400 g.mol-1 for C7I.

  19. Osteonecrosis del maxilar inferior por bifosfonatos: Presentación de caso

    Scientific Electronic Library Online (English)

    P., Sartori; G., Rajcovich; N., Taborda; M.C., Saleme Daza; C., Nally.

    2015-03-01

    Full Text Available La osteonecrosis del maxilar inferior secundaria a la administración de bifosfonatos es una patología infrecuente. Se produce en los pacientes medicados con esta droga, ya sea por vía oral o endovenosa, que luego de realizarse un procedimiento odontológico presentan necrosis ósea en la mandíbula. De [...] sde el primer reporte en el año 2003, se evidenció un crecimiento exponencial de esta patología. Presentamos dos casos clínicos de osteonecrosis del maxilar inferior por la administración de bifosfonatos, con el objetivo de difundir y crear conciencia entre los profesionales de la salud, considerando que no existe un tratamiento efectivo para esta entidad. Abstract in english The osteonecrosis of the jaw originated by the biphosphonate administration is an infrequent pathology in patients under treatment with biophosphonates given orally or through parenteral administration after some odontological treatment. These patients manifested osteonecrosis of the jaw. Since the [...] first case of osteonecrosis of the maxilar bone was reported in 2003, the number of patients with osteonecrosis of the jaw who have been treated with these drugs has increased notoriously. We report 2 clinical cases of patients with osteonecrosis of the jaw treated with bifosfonatos, in order to make this pathology known among the health professionals and raise awareness considering that there is no effective treatment.

  20. Trauma grave em membro inferior / Severe lower limb trauma

    Scientific Electronic Library Online (English)

    Regis Pietro Acempcion, Guiraldo; Cassiana Martins, Cabral; Ricardo Thompson, Nora; José Álvaro Lourenço, Gasques; Antonio Roberto, Bozola.

    2013-06-01

    Full Text Available Traumatismos graves de membros inferiores, com grandes perdas cutâneas e comprometimento de estruturas vitais, são casos de difícil resolução. A combinação de vários fatores, como esforço realizado e capacidade de distinguir a gravidade das lesões, ou seja, diferenciar as lesões recuperáveis ou viáv [...] eis daquelas que inevitavelmente irão evoluir para amputação, tem importante papel. Para tanto, surgiram índices que buscam estratificar a gravidade da lesão e predizer a necessidade de amputação, como o índice MESS (do inglês, Mangled Extremity Severity Score). Neste artigo, é reportado um caso de trauma grave de membro inferior, com reconstrução baseada no índice MESS, com emprego de múltiplos retalhos musculares e boa evolução funcional. Abstract in english Severe trauma to the lower limbs, with major skin loss and the compromise of vital structures, is often difficult to treat. A combination of several factors such as ability and effort made to distinguish lesion severity - that is, to differentiate recoverable traumas from those that will inevitably [...] progress to amputation - plays an important role. Therefore, indices were developed to facilitate the stratification of injury severity and prediction of the need for amputation, such as the Mangled Extremity Severity Score (MESS). In this article, we report a case of severe trauma to the lower limb, where reconstruction was performed based on the MESS index with multiple muscle flaps, and a good functional outcome was achieved.

  1. A calcified aneurysm of the inferior pancreaticoduodenal artery: Differential diagnosis considerations. Asymptomatisches verkalktes Aneurysma der Arteria pancreaticoduodenalis inferior - differentialdiagnostische Ueberlegungen

    Energy Technology Data Exchange (ETDEWEB)

    Gruen, B.; Tschakert, H.; Schaffeldt, J.; Steinhoff, M. (Knappschaftskrankenhaus Bardenberg, Wuerselen (Germany, F.R.). Abt. fuer Radiologie)

    1989-11-01

    A calcified aneurysm of the inferior pancreaticoduodenal artery with simultaneous occlusion of the celiac axis but without any local symptoms is presented. In the description of the diagnostic procedure, the considerations relating to differential diagnosis against solitary circumferentially calcified masses in the right upper quadrant of the abdomen are discussed. As a result of increasingly sophisticated examination techniques, especially digital subtraction angiography, computed tomography and ultrasonography, these aneurysms, which were formerly thought to be rare, are now discovered surprisingly often. Knowledge of this vascular malformation and its differential diagnoses helps to avoid risky methods of examination. (orig.).

  2. Accidental Displacement of Third Molar into the Sublingual Space: a Case Report

    Directory of Open Access Journals (Sweden)

    Rubens Jorge

    2014-10-01

    Full Text Available Background: Successful extraction of third molars depends on preoperative diagnosis and planning. Gold standard preoperative examinations are performed through computed tomography, decreasing risks and avoiding potential accidents. The present report highlights the value of preoperative examinations in face of accidentally displaced third molars. Methods: An 18-years-old female patient underwent a third mandibular molar extraction with a general dentist. Accidentally, the mandibular left third molar was displaced into the sublingual space, making necessary a second surgical step. The surgery was interrupted and the patient was referred to an expert in maxillofacial surgery. Results: After 21 days awaiting an asymptomatic health status, the second surgical step was successfully performed using multislice computed tomography as preoperative imaging guide. Conclusions: The present case report highlights the clinical usefulness of imaging planning and informed consents in face of legal and ethic potential complaints.

  3. Standard molar enthalpy of formation of 1-benzosuberone: An experimental and computational study

    International Nuclear Information System (INIS)

    The energetics of 1-benzosuberone was studied by a combination of calorimetric techniques and computational calculations. The standard (po = 0.1 MPa) molar enthalpy of formation of 1-benzosuberone, in the liquid phase, was derived from the massic energy of combustion, in oxygen, at T = 298.15 K, measured by static bomb combustion calorimetry. The standard molar enthalpy of vaporization, at T = 298.15 K, was measured by Calvet microcalorimetry. From these two parameters the standard (po = 0.1 MPa) molar enthalpy of formation, in the gaseous phase, at T = 298.15 K, was derived: -(96.1 ± 3.4) kJ . mol-1. The G3(MP2)//B3LYP composite method and appropriate reactions were used to computationally calculate the standard molar enthalpy of formation of 1-benzosuberone, in the gaseous phase, at T = 298.15 K. The computational results are in very good agreement with the experimental value.

  4. Micro-CT analyses of apical enlargement and molar root canal complexity

    DEFF Research Database (Denmark)

    Markvart, M; Darvann, T A; Larsen, P; Dalstra, Michel; Kreiborg, S; Bjørndal, L

    2012-01-01

    To compare the effectiveness of two rotary hybrid instrumentation techniques with focus on apical enlargement in molar teeth and to quantify and visualize spatial details of instrumentation efficacy in root canals of different complexity.

  5. A rare presentation of dens in dente in the mandibular third molar with extra oral sinus

    Directory of Open Access Journals (Sweden)

    Bansal Monika

    2010-01-01

    Full Text Available The unusual case of dense in dente in mandibular molar area with extra oral sinus in a 30-year-old female is presented. The chief complaint of the patient was wound formation and pus discharge from the right side of lower jaw for many years. Clinical examination revealed extra oral sinus and mild swelling in vestibular region opposite the right mandibular molars. On radiographical examination, right mandibular third molar had bulbous root associated with periapical radiolucency. It appeared that there was a tooth within a tooth and the invagination extended nearly to the root apex. A clinical diagnosis of dense in dente Type III was confirmed by stereomicroscopy of ground section of the tooth. Extra oral sinus healed after extraction of the mandibular third molar within a month.

  6. Molar incisor hypomineralization: Considerations about treatment in a controlled longitudinal case

    Directory of Open Access Journals (Sweden)

    Daniela Cristina de Oliveira

    2015-01-01

    Full Text Available Molar incisor hypomineralization (MIH is a defect in the tooth enamel of systemic origin and may affect one or all four first permanent molars frequently associated with the permanent incisors. This case reports a 7-year-old child with severe MIH in the permanent molars associated with tooth decay and intense pain. In the first stage of treatment, therapy was performed with fluoride varnish and restoration with glass ionomer cement (GIC. After 6 years of clinical and radiographic follow-up, the restorations presented wear and fractures on the margins, indicating their replacement with composite resin. Severe cases of MIH in the early permanent molars can be treated with varnish and GIC to restore the patient?s comfort and strengthen the hypomineralized dental structures. The clinical and radiographic monitoring frequently indicated when the restoration with composite resin should be performed.

  7. Topography of the pulp chamber in the maxillary primary molars of a Tunisian children

    Directory of Open Access Journals (Sweden)

    Chiraz Baccouche

    2013-01-01

    Conclusion: Mesiodistal dimension of the pulp cavity is not proportional to that of the dental crown. Endodontic access cavity have to be shifted to the distal and vestibular sides from the first to the second upper molar.

  8. Recent trends in chemistry and mass budget of a high altitude lake in the southern Alps (Laghetto Inferiore, Canton Ticino, Switzerland

    Directory of Open Access Journals (Sweden)

    Rosario MOSELLO

    2000-08-01

    Full Text Available Since 1980, surveys have been performed every three years on about 50 small high-altitude Alpine lakes located in the Swiss part of the Lago Maggiore watershed (Southern Central Alps. Since 1996 one of these lakes, Laghetto Inferiore (LI has been included in the Mountain Lakes Research (MOLAR program, an extensive European co-operative research project with 23 partners. Laghetto Inferiore, situated at 2074 m a.s.l., has a watershed mainly composed of crystalline silicic rocks, a maximum depth of 33 m and a theoretical renewal time of 41 days. The watershed includes a second lake, Laghetto Superiore (LS, located at 2128 m a.s.l. The surface water pH of LI is around 6.6, while alkalinity is about 30 ?eq l-1, increasing to 90 ?eq l-1 at the maximum depth. Calculated inputs from atmospheric deposition and the main tributary streams were compared with changes in the lake concentration, and outflow fluxes on a monthly basis. Weathering ranged between 90-130 meq m-2 of alkalinity using a mass budget approach, of which 50% was consumed by the actual (H+ and potential (NH4 + atmospheric acidity. Chemical trends over the period 1985-1998 show an increase in alkalinity and a decrease in sulphate, due to a reduction in the deposition of atmospheric acidity, and a decrease in nitrate, probably because of increased lake productivity.

  9. Pressão interna e refração molar dos sistemas dimetilsulfóxido + tiofeno, dimetilsulfóxido + piridina a 298,15K / Internal pressure and molar refraction of dimethylsulfoxide + thiophene and dimetilsulfoxide + pyridine at 298.15K

    Scientific Electronic Library Online (English)

    Silvia Beatriz, AZNAREZ; Miguel Ángelo, POSTIGO; Adair, MARTINS.

    Full Text Available Pressão interna, volume livre, refração molar e propriedades termodinâmicas de excesso de misturas líquidas binárias de dimetil sulfóxido + tiofeno e dimetil sulfóxido + piridina a 298.15K foram calculadas a partir de medidas experimentais de densidades, tensão superficial e índice de refração. A re [...] lação entre a pressão interna, volume molar de excesso, refração molar, e a interação molecular dos sistemas binários é examinada. Abstract in english Internal pressure, free volume, molar refraction and excess molar thermodynamic properties of binary liquid mixtures of dimethyl sulfoxide + thiophene and dimetil sulfoxide + pyridine at 298.15K have been evaluated from the experimental measurements of densities, surface tension and refractive index [...] . The relationship between the internal pressure, excess molar volume, molar refraction, and the molecular interaction of the bianry sistems is examined.

  10. A geometric morphometric analysis of hominin lower molars: Evolutionary implications and overview of postcanine dental variation.

    Science.gov (United States)

    Gómez-Robles, Aida; Bermúdez de Castro, José María; Martinón-Torres, María; Prado-Simón, Leyre; Arsuaga, Juan Luis

    2015-05-01

    Lower molars have been extensively studied in the context of hominin evolution using classic and geometric morphometric analyses, 2D and 3D approaches, evaluations of the external (outer enamel surface) and internal anatomy (dentine, pulp chamber, and radicular canals), and studies of the crown and root variation. In this study, we present a 2D geometric morphometric analysis of the crown anatomy of lower first, second, and third molars of a broad sample of hominins, including Pliocene and Lower, Middle, and Upper Pleistocene species coming from Africa, Asia, and Europe. We show that shape variability increases from first to second and third molars. While first molars tend to retain a relatively stable 5-cusped conformation throughout the hominin fossil record, second and third molars show marked distal reductions in later Homo species. This trend to distal reduction is similar to that observed in previous studies of premolars and upper second and third molars, and points to a correlated reduction of distal areas across the whole postcanine dentition. Results on lower molar variation, as well as on other postcanine teeth, show certain trends in European Pleistocene populations from the Atapuerca sites. Middle Pleistocene hominins from Sima de los Huesos show Neanderthal affinities and strong dental reduction, especially in the most distal molars. The degree of dental reduction in this population is stronger than that observed in classic Neanderthals. Homo antecessor hominins from Gran Dolina-TD6 have primitive lower teeth that contrast with their more derived upper teeth. The evolutionary implications of these dental affinities are discussed in light of recent paleogenetic studies. PMID:25840859

  11. Endodontic management of a mandibular second molar with radix entomolaris: a case report

    OpenAIRE

    Hannah, Rosaline; Kandaswamy, Deivanayagam; Jayaprakash, Nachimuthu

    2014-01-01

    The presence of radix entomolaris (RE) in a mandibular first molar is a common occurrence in certain ethnic groups, but the presence of RE in a mandibular second molar is a rare occurrence. In the present case, RE was identified from preoperative radiographs and confirmed using cone-beam computed tomography (CBCT). The access cavity was modified to locate the RE. Cleaning and shaping were performed with nickel-titanium rotary instruments. Obturation was completed with gutta-percha cones using...

  12. Root Canal Morphology of Mandibular First Permanent Molars in an Indian Population

    OpenAIRE

    Hemant Ramesh Chourasia; Ganesh K. Meshram; Manjusha Warhadpande; Darshan Dakshindas

    2012-01-01

    An in vitro study was performed to determine the number of roots, root canals per tooth, root canal configurations, and frequency of isthmi and apical deltas in mandibular first permanent molars in an Indian population. Hundred and fifty mandibular first permanent molars were collected and subjected to clearing technique. The cleared teeth were examined in a stereomicroscope under 7.5x magnifications. The canal configurations were categorized using Vertucci's classification. Overall 94.6% of ...

  13. Association between Enamel Hypoplasia and Dental Caries in Primary Second Molars: A Cohort Study

    OpenAIRE

    Hong, L; Levy, S.M.; J. J. Warren; Broffitt, B.

    2009-01-01

    The purpose of this study was to assess the longitudinal relationships between enamel hypoplasia and caries experience of primary second molars. The study sample was 491 subjects who received dental examinations at both age 5 and 9 by the calibrated examiners. Four primary second molars (n = 1,892) were scored for the presence of enamel hypoplasia for each participant. Caries presence and number of decayed and filled surfaces (dfs) were determined at age 5 and 9. The relationships between ena...

  14. Radiographic Evaluation of Third Molar Development in 5- to 25 Year Olds in Tehran, Iran

    OpenAIRE

    Jafari, A.; SZ. Mohebbi; Khami, MR.; M. Shakur Shahabi; Naseh, M.; F. Elhami; AR. Shamshiri

    2012-01-01

    Objective: Radiographic evaluation of the third molar tooth to determine its position and degree of development is an important part in diagnosis and treatment planning, as well as in forensic dentistry procedures. The objective was to investigate the developmental stages of third molars in relation to chronologic age, gender and location (maxillary/mandibular) in an Iranian population.Materials and Methods: The data were collected in departments of pediatric dentistry and orthodontics, Tehra...

  15. Treatment of space loss caused by submerged maxillary second primary molar

    OpenAIRE

    Karacay S; Guven G; Basak F

    2007-01-01

    Submersion is a clinical term describing a tooth depressed below the occlusal plane. In this case report, we present the treatment of a patient who had totally submerged primary maxillary second molar, which caused impaction of the second premolar and space loss in the maxillary arch due to tipping of adjacent teeth. A 12-year-old girl was referred to the pediatric dentistry clinic. The intra-oral examination revealed that right maxillary second primary molar was localized buccal side of post...

  16. Diagnosis of molar pregnancy and persistent trophoblastic disease by flow cytometry.

    OpenAIRE

    Hemming, J D; Quirke, P; Womack, C.; Wells, M.; Elston, C. W.; Bird, C C

    1987-01-01

    Histopathological assessment and flow cytometric analyses were carried out on 32 placentas (representative of each trimester) and 88 molar pregnancies. Three first trimester placentas were triploid, and the remaining 29 placentas were diploid. Of the 88 cases originally diagnosed as molar pregnancies, 26 were triploid (two complete moles, 20 partial moles, and four hydropic abortions); 59 were diploid (46 complete moles, 10 partial moles, three hydropic abortions); one was tetraploid (partial...

  17. Micro-CT analyses of apical enlargement and molar root canal complexity

    DEFF Research Database (Denmark)

    Markvart, Merete; Darvann, Tron Andre; Larsen, Per; Dalstra, Michel; Kreiborg, Sven; Bjørndal, Lars

    2012-01-01

    AIM: To compare the effectiveness of two rotary hybrid instrumentation techniques with focus on apical enlargement in molar teeth and to quantify and visualize spatial details of instrumentation efficacy in root canals of different complexity. METHODOLOGY: Maxillary and mandibular molar teeth were scanned using X-ray microcomputed tomography. Root canals were prepared using either a GT/Profile protocol or a RaCe/NiTi protocol. Variables used for evaluation were the following: distance between ro...

  18. Evaluation of the anatomical alterations of lower molars mesial root?s apical third

    Directory of Open Access Journals (Sweden)

    FRÖNER Izabel Cristina

    1999-01-01

    Full Text Available The anatomical apex of the mesial root of the lower molars presents a morphological complexity related to the number and shape of the root canals as well as of the apical foramen and isthmus presence. The knowledge of the complexity of the endodontic system of the molar root area is essencial to select more carefully the best instrumentation and obturation technique, to obtain a more successful endodontic therapy.

  19. Anatomical Relationship of Lingual Nerve to the Region of Mandibular Third Molar

    OpenAIRE

    Marcelo Breno Meneses Mendes; Carla Maria de Carvalho Leite Leal Nunes; Maria Cândida de Almeida Lopes

    2014-01-01

    Objectives: This study evaluated the relationship of the lingual nerve with the adjacent anatomical structures of the mandibular third molar region, influencing the dentist to be aware of the variability of these relationships. Material and Methods: Samples of 24 human corpse half-heads were selected and divided according with the presence or absence of the mandibular third molars. The lingual nerve (LN) was explored, showing its run from the oblique line until its crossing with the subma...

  20. Root Canal Treatment of a Maxillary Second Molar with Two Palatal Canals: a Case Report

    Science.gov (United States)

    Nabavizadeh, MohammadReza; Abbaszadegan, Abbas; Mirhadi, Hosein; Ghahramani, Yasmin

    2015-01-01

    Careful understanding of internal anatomy of root canal system is crucial for successful endodontic treatment. The presence of two palatal canals in maxillary second molar is unusual but noteworthy as an aid to appropriate diagnosis and treatment. This paper reported a case of a maxillary right second molar with two root canals in the palatal root. The root canal treatment and case management were also explained. PMID:26636127

  1. Fracture Resistance of Pulpotomized Primary Molar Restored with Extensive Class II Amalgam Restorations

    Directory of Open Access Journals (Sweden)

    F. Mazhari

    2008-06-01

    Full Text Available Objective: The aim of the present study was to evaluate fracture resistance of pulpoto-mized primary molar teeth restored with extensive multisurface amalgam restorations.Materials and Methods: Eighty extracted carious human primary molar teeth were se-lected forpresent study. Teeth were divided in to eight groups of ten. Mesio- or disto-occlusal and Mesio-occluso-distal cavities with different cavity wall thickness (1.5 or 2.5mm were prepared in both first and second primary molar teeth. After restoring teeth with amalgam, all specimens were stored in distilled water at 37°C for 7 days. Then samples were thermocycled for 1000 cycles from 5°C to 55°C. The specimens then were subjected to a compressive load in a universal testing machine at a crosshead speed of 0.5 mm min-1. ANOVA and t-test were used for statistical analysis.Results: Mean fracture resistance of first and second molar teeth were 975.5 N (SD=368.8 and 1049.2 N (SD=540.1 respectively. In the first molar group, fracture resis-tance of two-surface cavities was significantly more than three-surface cavities (P<0.001, however this difference was not statistically significant in the second molar group. In both first and second molar group, fracture resistance incavities with 2.5 mm wall thickness, was significantly more than the group with 1.5 mm wall thickness.Conclusion: The mean fracture resistance in pulpotomized primary molar restored with amalgam restorations was higher than reported maximum bite force in primary teeth even in extensive multi-surface restorations. Therefore, the teeth with large proximal carious lesions in schoolchildren could be restored with amalgam.

  2. Incidence of symptoms and signs of TMD following third molar surgery: a controlled, prospective study

    DEFF Research Database (Denmark)

    Juhl, Gitte Irene; Jensen, Troels Staehelin; Nørholt, Svend Erik; Svensson, P

    2009-01-01

    The purpose of this prospective study was to investigate if third molar surgery is associated with the development of symptoms and signs of temporomandibular disorders (TMD) during a 6-month post-operative observation period using the Research Diagnostic Criteria for TMD (RDC/TMD) instrument. Seventy-two subjects eligible for third molar surgery under local anaesthesia (patients) were included. Patients were examined according to the RDC/TMD instrument at baseline, 1 week, 1 and 6 months after s...

  3. Validation of a computer-assisted system on classifying lower third molars

    OpenAIRE

    Cortell Ballester, Isidoro; Almendros-Marqués, Nieves; Berini Aytés, Leonardo; Gay Escoda, Cosme

    2010-01-01

    Objectives: The present study evaluates the reliability of the Radio Memory® software (Radio Memory; Belo Horizonte,Brasil.) on classifying lower third molars, analyzing intra- and interexaminer agreement of the results. Study Design: An observational, descriptive study of 280 lower third molars was made. The corresponding orthopantomographs were analyzed by two examiners using the Radio Memory® software. The exam was repeated 30 days after the first observation by each examiner. Both intra- ...

  4. The clinical success of different root canal treatments in primary molars

    OpenAIRE

    Çi?dem Güler; Taskin Gurbuz; Yucel Yilmaz

    2013-01-01

    Objectives: To examine the success rate of root canal treatment in primary molars with the use two different root canal instrumentation ways, irrigation solutions and root canal sealers.

    Materials and Methods: Root canal treatment was applied to 120 second primary molars of 69 children between 5-8 years old. The teeth were divided in 8 groups randomly according to instrumentation ways [conventional stainless...

  5. Unerupted lower third molar extractions and their risks for mandibular fracture.

    Science.gov (United States)

    Corrêa, Ana Paula Simões; Faverani, Leonardo Perez; Ramalho-Ferreira, Gabriel; Ferreira, Sabrina; Ávila Souza, Francisley; de Oliveira Puttini, Igor; Rangel Garcia-Júnior, Idelmo

    2014-05-01

    As every surgical procedure extraction of third molars can result in several complications, among them the mandibular angle fracture. Predisposing factors for fracture should be analyzed during and after the surgery. This paper aims to discuss the predisposing factors to the occurrence of mandibular angle fractures during and after the procedure for third molars extraction, as well as surgical principles to avoid this complication. PMID:24785744

  6. TRAYECTO DEL NERVIO GLUTEO INFERIOR ASOCIADO A LA DIVISION ALTA DEL NERVIO ISQUIATICO / INFERIOR GLUTEAL NERVE COURSE ASSOCIATED TO THE HIGH DIVISION OF THE SCIATIC NERVE

    Scientific Electronic Library Online (English)

    Carla, Gabrielli; Enrique, Olave; Eduardo, Mandiola; Célio F.S., Rodrigues.

    Full Text Available El nervio glúteo inferior, ramo del plexo sacro, abandona la pelvis pasando generalmente por debajo del músculo piriforme. De este plexo se origina también el nervio isquiático, el cual puede presentar variaciones en su relación con el músculo mencionado, entre ellas, las que se refieren a la divisi [...] ón alta del mismo. Sin embargo, son escasos los trabajos que correlacionen esta división con el trayecto del nervio glúteo inferior y su relación con el músculo piriforme. Con el propósito de verificar una posible asociación entre los trayectos de estos nervios, fueron disecadas 80 regiones glúteas de cadáveres de individuos brasileños adultos en el Departamento de Morfología de la Universidade Federal de São Paulo. Se encontraron dos tipos de variación entre el nervio isquiático y el músculo piriforme: en 9 casos (11,2 %) el nervio fibular común pasó a través del músculo y el nervio tibial transcurrió por debajo de su margen inferior (Tipo I); en dos casos (2,5 %), correspondientes a un mismo individuo, el nervio fibular común hizo su trayecto por sobre el margen superior del músculo piriforme y el nervio tibial pasó por debajo de su margen inferior (Tipo II). En el tipo I, el nervio glúteo inferior pasó a través del músculo en 6 casos y en los 3 restantes una parte del nervio perforó al músculo y la otra pasó por debajo de su margen inferior; en el tipo II, el nervio glúteo inferior transcurrió por debajo del margen inferior del músculo en uno de los casos y en el otro, una parte de este nervio se originó del nervio fibular común y la otra, pasó por debajo del margen inferior del músculo. El trayecto del nervio glúteo inferior a través del músculo piriforme podría estar relacionado con la atrofia glútea observada en los pacientes con "síndrome del músculo piriforme Abstract in english The inferior gluteal nerve, branch of the sacral plexus, leaves the pelvis and passes usually below of the piriformis muscle. The sciatic nerve also comes from this plexus and can present distinct relationships with the mentioned muscle, among these ones it is found the one related to the high divis [...] ion of the nerve. However, the studies that correlates this division with the course of the inferior gluteal nerve and its relationship with the piriformis muscle are scarce. In order to verify a possible association between these anatomical structures, we dissected 80 gluteal regions of adult Brazilian cadavers. Two types of variations were found between the sciatic nerve and the piriformis muscle. The common fibular nerve pierced the muscle and the tibial nerve passed below of its inferior margin in 9 cases (11,2 %), corresponding to the type I; in 6 of these cases the trunk of the inferior gluteal nerve passed through the muscle and in just 3 cases, only a portion perforated the muscle. The type II was observed in 2 cases (2,5 %), corresponding to the same individual, in this type the common fibular nerve passed over the superior margin and the tibial nerve below of the inferior margin of the piriformis muscle. In the rigth side, the trunk of the inferior gluteal nerve passed below of the inferior margin of the muscle; in the left side, it is found only a portion of the nerve originated from the common fibular nerve and the other portion passed below the inferior margin of the muscle. The course of the inferior gluteal nerve through the piriformis muscle could be related to the gluteal atrophy observed in the patients with the "piriformis syndrome

  7. TRAYECTO DEL NERVIO GLUTEO INFERIOR ASOCIADO A LA DIVISION ALTA DEL NERVIO ISQUIATICO INFERIOR GLUTEAL NERVE COURSE ASSOCIATED TO THE HIGH DIVISION OF THE SCIATIC NERVE

    Directory of Open Access Journals (Sweden)

    Carla Gabrielli

    1997-01-01

    Full Text Available El nervio glúteo inferior, ramo del plexo sacro, abandona la pelvis pasando generalmente por debajo del músculo piriforme. De este plexo se origina también el nervio isquiático, el cual puede presentar variaciones en su relación con el músculo mencionado, entre ellas, las que se refieren a la división alta del mismo. Sin embargo, son escasos los trabajos que correlacionen esta división con el trayecto del nervio glúteo inferior y su relación con el músculo piriforme. Con el propósito de verificar una posible asociación entre los trayectos de estos nervios, fueron disecadas 80 regiones glúteas de cadáveres de individuos brasileños adultos en el Departamento de Morfología de la Universidade Federal de São Paulo. Se encontraron dos tipos de variación entre el nervio isquiático y el músculo piriforme: en 9 casos (11,2 % el nervio fibular común pasó a través del músculo y el nervio tibial transcurrió por debajo de su margen inferior (Tipo I; en dos casos (2,5 %, correspondientes a un mismo individuo, el nervio fibular común hizo su trayecto por sobre el margen superior del músculo piriforme y el nervio tibial pasó por debajo de su margen inferior (Tipo II. En el tipo I, el nervio glúteo inferior pasó a través del músculo en 6 casos y en los 3 restantes una parte del nervio perforó al músculo y la otra pasó por debajo de su margen inferior; en el tipo II, el nervio glúteo inferior transcurrió por debajo del margen inferior del músculo en uno de los casos y en el otro, una parte de este nervio se originó del nervio fibular común y la otra, pasó por debajo del margen inferior del músculo. El trayecto del nervio glúteo inferior a través del músculo piriforme podría estar relacionado con la atrofia glútea observada en los pacientes con "síndrome del músculo piriformeThe inferior gluteal nerve, branch of the sacral plexus, leaves the pelvis and passes usually below of the piriformis muscle. The sciatic nerve also comes from this plexus and can present distinct relationships with the mentioned muscle, among these ones it is found the one related to the high division of the nerve. However, the studies that correlates this division with the course of the inferior gluteal nerve and its relationship with the piriformis muscle are scarce. In order to verify a possible association between these anatomical structures, we dissected 80 gluteal regions of adult Brazilian cadavers. Two types of variations were found between the sciatic nerve and the piriformis muscle. The common fibular nerve pierced the muscle and the tibial nerve passed below of its inferior margin in 9 cases (11,2 %, corresponding to the type I; in 6 of these cases the trunk of the inferior gluteal nerve passed through the muscle and in just 3 cases, only a portion perforated the muscle. The type II was observed in 2 cases (2,5 %, corresponding to the same individual, in this type the common fibular nerve passed over the superior margin and the tibial nerve below of the inferior margin of the piriformis muscle. In the rigth side, the trunk of the inferior gluteal nerve passed below of the inferior margin of the muscle; in the left side, it is found only a portion of the nerve originated from the common fibular nerve and the other portion passed below the inferior margin of the muscle. The course of the inferior gluteal nerve through the piriformis muscle could be related to the gluteal atrophy observed in the patients with the "piriformis syndrome

  8. Excess molar volumes of binary mixtures (an ionic liquid + water): A review

    International Nuclear Information System (INIS)

    Highlights: • Review of excess molar volumes for mixtures of (ionic liquids (ILs) + H2O). • 6 cation groups reviewed including imidazolium and pyrrolidinium groups. • 13 anions reviewed including tetraborate, triflate, and hydrogensulphate. • Effects of anion, cation, and temperature investigated. - Abstract: This review covers recent developments in the area of excess molar volumes for mixtures of {ILs (1) + H2O (2)} where ILs refers to ionic liquids involving cations: imidazolium, pyridinium, pyrrolidinium, piperidinium, morpholinium and ammonium groups; and anions: tetraborate, triflate, hydrogensulphate, methylsulphate, ethylsulphate, thiocyanate, dicyanamide, octanate, acetate, nitrate, chloride, bromide, and iodine. The excess molar volumes of aqueous ILs were found to cover a wide range of values for the different ILs (ranging from ?1.7 cm3 · mol?1 to 1.2 cm3 · mol?1). The excess molar volumes increased with increasing temperature for all systems studied in this review. The magnitude and in some cases the sign of the excess molar volumes for all the aqueous ILs mixtures, apart from the ammonium ILs, were very dependent on temperature. This was particularly important in the dilute IL concentration region. It was found that the sign and magnitude of the excess molar volumes of aqueous ILs (for ILs with hydrophobic cations), was more dependent on the nature of the anion than on the cation

  9. Aneurisma da artéria cerebelar ântero-inferior: relato de caso Aneurysm of the anterior inferior cerebellar artery: case report

    Directory of Open Access Journals (Sweden)

    Juan Oscar Alarcón Adorno

    2002-12-01

    Full Text Available Os aneurismas intracranianos do sistema vértebro-basilar representam cerca de 5 a 10% de todos os aneurismas cerebrais. Os aneurismas da artéria cerebelar ântero-inferior (AICA são considerados raros, podendo causar síndrome do ângulo ponto cerebelar, com ou sem hemorragia subaracnóidea. Desde 1948, foram descritos poucos casos na literatura. Apresentamos o caso de uma paciente, de 33 anos, na qual, após investigação de quadro de hemorragia subaracnóidea, diagnosticou-se aneurisma sacular da AICA esquerda. Foi submetida a clipagem do aneurisma, com ótimo resultado pós operatório.The intracranial aneurysms of the posterior circulation have been reported between 5 and 10% of all cerebral aneurysms and the aneurysms of the anterior inferior cerebellar artery (AICA are considered rare, can cause cerebello pontine angle (CPA syndrome with or without subarachnoid hemorrhage. Since 1948 few cases were described in the literature. We report on a 33 year-old female patient with subarachnoid hemorrhage due to sacular aneurysm of the left AICA. She was submitted to clipage of the aneurysm without complications.

  10. Distalização dos molares superiores com aparelho Pendex: estudo em modelos de gesso Distal movement of the upper molars with the Pendex appliance: a study with cast models

    Directory of Open Access Journals (Sweden)

    Eduardo César Almada Santos

    2006-06-01

    Full Text Available OBJETIVO: a presente pesquisa clínica, longitudinal e prospectiva, avaliou os efeitos do aparelho Pendex mediante o emprego de modelos de gesso. METODOLOGIA: utilizou-se uma amostra de 30 modelos de gesso, obtidos no início e no final da distalização dos molares superiores com o aparelho Pendex, de 15 jovens brasileiros tratados no Curso de Pós-Graduação, nível de Mestrado em Ortodontia, da Faculdade de Odontologia de Araçatuba - UNESP. RESULTADOS E CONCLUSÕES: os resultados mostraram aumento do perímetro do arco dentário superior com inclinação distal e controle transversal dos primeiros molares superiores.AIM: this clinical longitudinal prospective study evaluated in cast models the effects of the Pendex appliance. METHODS: thirty cast models of 15 adolescents treated at the Post-graduate course of the School of Dentistry of Araçatuba - UNESP were obtained at the beginning and at the end of the distal movement of the upper molars with the Pendex appliance. RESULTS AND CONCLUSIONS: the results showed increase of the upper dental arch perimeter with distal inclination and transverse control of the upper first molars

  11. MOLAR. Measuring and modelling the dynamic response of remote mountain lake ecosystems to environmental change: A programme of Mountain Lake Research. MOLAR Project Manual. Draft of September 1996

    Energy Technology Data Exchange (ETDEWEB)

    Wathne, B.M.

    1996-09-01

    This report lays down the practical working methods of the MOLAR project. Requirements on preparatory work and methods for sampling in the field are given in detail. Also sample handling after field work, where to send the sample material for further analysis and how to treat the results are described. 97 refs., 10 figs., 14 tabs.

  12. Radiographic evaluation of third molar genesis in Greek orthodontic patients

    Directory of Open Access Journals (Sweden)

    Barka G

    2013-09-01

    Full Text Available Georgia Barka,1 Konstantinos Marathiotis,2 Michael Protogerakis,3 Andreas Zafeiriadis4 1Department of Dentoalveolar Surgery, Implant Surgery and Radiology, School of Dentistry, Aristotle University of Thessaloniki, 2School of Biology, Faculty of Science and School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece; 3Clinical Implant Dentistry, School of Dental Sciences, Newcastle University, Newcastle Upon Tyne, UK; 4Department of Orthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece Objectives: The study reported here investigated the first radiographic evidence of third molar (M3 formation, their incidence and distribution as well as their congenital absence on the right or the left side in either the maxilla or the mandible, in both male and female Greek orthodontic patients. Materials and methods: A total of 618 panoramic radiographs were initially examined. After the application of inclusion/exclusion criteria, the group finally selected consisted of 428 patients (mean age 11.64 years, range 5–18: 179 males (mean age 11.73 ± 2.46 and 249 females (mean age 11.57 ± 2.45. The collected data were analyzed using SPSS software (IBM, Armonk, New York, NY, USA. The level of significance for all analyses was set to p = 0.05. The chi-square (?2 test was used to assess the relationships between variables. The Wilcoxon’s signed-rank test and the Mann–Whitney U test were also used for comparisons as well as the Spearman’s rho test for correlations. Results: M3s were first detected in females at the age of 7 years whereas males followed one year later at the age of 8 years. A strong correlation between age and M3 development was revealed for both sexes (Spearman’s rho = 0.177, p = 0.05. Presence of all four M3s was the most common incidence (present in 70.8% of study subjects, followed by the agenesis of two (12.1%, agenesis of all four (8.4%, one (6.8%, and three (1.9% M3s. Congenitally missing M3s in all subjects showed a significantly greater predilection for the maxilla over the mandible (19.6% and 15.5%, respectively (Wilcoxon signed-rank test Z = ?2.404, p = 0.016. However, the distribution was found equal between the two sides of the jaws. The difference between the absent frequencies of M3s in the mandible and the maxilla was found statistically significant for the total sample (McNemar’s test, p < 0.001 and for males (p = 0.041 as well. Conclusion: The study data may provide a reference for the M3 genesis in Greeks. Keywords: dental genesis, maxilla, mandible

  13. Posttransplant Complex Inferior Venacava Balloon Dilatation After Hepatic Vein Stenting

    International Nuclear Information System (INIS)

    Orthotopic and living related liver transplantation is an established mode of treatment of end-stage liver disease. One of the major causes of postoperative complications is vascular anastomotic stenosis. One such set of such complications relates to hepatic vein, inferior vena cava (IVC), or portal vein stenosis, with a reported incidence of 1-3%. The incidence of vascular complications is reported to be higher in living donor versus cadaveric liver transplants. We encountered a patient with hepatic venous outflow tract obstruction, where the hepatic vein had been previously stented, but the patient continued to have symptoms due to additional IVC obstruction. The patient required double-balloon dilatation of the IVC simultaneously from the internal jugular vein and IVC.

  14. Inferior rectus muscle ocular cysticercosis: A case report.

    Science.gov (United States)

    Goyal, Sanjiv; Sandhu, Pawandeep Singh; Sharma, Ankita; Malik, Manzoor Ahmad; Bansal, Parveen; Kaur, Jasbir

    2015-01-01

    Cysticercosis is a systemic parasitic disease caused by the larval form of cestode Taenia solium. It has a worldwide distribution and is potentially harmful with variable clinical manifestations. The most commonly involved sites include eye, brain, bladder wall, and heart. Ocular cysticercosis can be extraocular or intraocular and may present with varied clinical symptoms. We report the condition in a thirteen year old female child who presented with mild lower lid swelling and diplopia in upgaze, wherein cysticercus cellulosae cyst was found within the mass of the right inferior rectus muscle. It becomes important to report this case because of the relative rarity of the condition these days, unusual site of the cyst and the young age of the patient. PMID:25892941

  15. Anatomy and radiology of the anterior inferior cerebellar artery

    International Nuclear Information System (INIS)

    This study describes the variations of the Anterior Inferior Cerebellar Artery (AICA) and identifies its types of appearance in normal angiograms as well as in angiograms of patients suffering from posterior fossa tumours or from ischemic lesions in the vertebro-basilar territory. For this purpose a study of 20 normal specimens was undertaken. Four main types of the AICA are distinguished. One hundred normal vertebral angiograms, made between 1976 and 1982 in the Valeriuskliniek and the Academisch Ziekenhuis der Vrije Univesiteit are reviewed. The AICA's are classified in the same way as in the anatomical study. The same classification was used in the analysis of 41 vertebral angiograms of patients with posterior fossa tumours and nine angiograms of patients with ischemic disturbances in the posterior cranial fossa. (Auth.)

  16. Retained Third Molars Removal in a Severely Resorbed Edentulous Mandible. A Case Report

    Scientific Electronic Library Online (English)

    Cassio Edvard, Sverzut; Alexandre Elias, Trivellato; Alexander Tadeu, Sverzut; Marcelo Rodrigues, Azenha; Marco Aurelio Kenichi, Yamaji; Andre Oliveira, Pepato.

    2013-09-01

    Full Text Available A presença de terceiros molares inclusos assintomáticos pode representar um grande problema quando estes dentes encontram-se inclusos em um paciente desdentado total. Uma vez que os primeiros e segundos molares foram extraídos, o corpo mandibular torna-se mais frágil com o passar do tempo, o que aum [...] enta a complexidade, a morbidade e a incidência de complicações nas cirurgias de remoção de terceiros molares inclusos. Neste artigo é apresentado um caso de uma paciente de 54 anos de idade com severa reabsorção do osso mandibular onde os terceiros molares mandibulares encontravam-se inclusos e com necessidade de extração. O plano de tratamento objetivou a extração segura dos dentes e a reabilitação mandibular com o uso de uma prótese implanto-suportada. Se a extração dos terceiros molares inclusos é indicada em pacientes que apresentam mandíbula atrófica, o plano de tratamento deve incluir não apenas as medidas preventivas com o intuito de prevenir a fratura da mandíbula durante ou após a remoção dos dentes, mas também alternativas de tratamento que possibilitem uma adequada reabilitação. Abstract in english The presence of asymptomatic third molars can represent a potential problem in the mandible when these teeth are retained and the patient has lost all normally erupted teeth. Once the mandibular first and second molars are removed, the mandibular body becomes weaker with time, increasing the complex [...] ity, morbidity and incidence of complication in the surgical procedure to remove the retained third molar. This paper reports a case where the mandibular third molars retained in a severely resorbed mandible were removed in a 54-year-old female patient. The treatment plan was based on the safe surgical removal of the teeth and prosthetic rehabilitation with an implant-supported milled bar overdenture and a bone-mucous-supported complete denture in the mandibular and maxillary arch, respectively. If the removal of a retained third molar is indicated in a severely resorbed edentulous mandible, the treatment plan must involve not only preventive measures in order to avoid mandible fracture during or after tooth removal, but also alternatives that allow an adequate mandibular rehabilitation.

  17. Sensitivity of rat inferior colliculus neurons to frequency distributions.

    Science.gov (United States)

    Herrmann, Björn; Parthasarathy, Aravindakshan; Han, Emily X; Obleser, Jonas; Bartlett, Edward L

    2015-11-15

    Stimulus-specific adaptation refers to a neural response reduction to a repeated stimulus that does not generalize to other stimuli. However, stimulus-specific adaptation appears to be influenced by additional factors. For example, the statistical distribution of tone frequencies has recently been shown to dynamically alter stimulus-specific adaptation in human auditory cortex. The present study investigated whether statistical stimulus distributions also affect stimulus-specific adaptation at an earlier stage of the auditory hierarchy. Neural spiking activity and local field potentials were recorded from inferior colliculus neurons of rats while tones were presented in oddball sequences that formed two different statistical contexts. Each sequence consisted of a repeatedly presented tone (standard) and three rare deviants of different magnitudes (small, moderate, large spectral change). The critical manipulation was the relative probability with which large spectral changes occurred. In one context the probability was high (relative to all deviants), while it was low in the other context. We observed larger responses for deviants compared with standards, confirming previous reports of increased response adaptation for frequently presented tones. Importantly, the statistical context in which tones were presented strongly modulated stimulus-specific adaptation. Physically and probabilistically identical stimuli (moderate deviants) in the two statistical contexts elicited different response magnitudes consistent with neural gain changes and thus neural sensitivity adjustments induced by the spectral range of a stimulus distribution. The data show that already at the level of the inferior colliculus stimulus-specific adaptation is dynamically altered by the statistical context in which stimuli occur. PMID:26354316

  18. INFERIORITY COMPLEX AND ASSERTIVENESS AMONG UG STUDENTS STUDIED IN ENGLISH th AND VERNACULAR LANGUAGE IN 12 STANDARD.

    OpenAIRE

    S Shalini

    2014-01-01

    The present paper focused on the aspects of inferiority complex and assertiveness among students .By participating in student life, students realize their abilities and creativity. But some students develop inferiority complex in their life. The problem of Inferiority complex among adolescents is becoming increasingly alarming. Teenage years are the prime years of bearing the burden of inferiority feelings. This study was done to assess the inferiority complex ( measured b...

  19. The Component Slope Linear Model for Calculating Intensive Partial Molar Properties: Application to Waste Glasses

    Energy Technology Data Exchange (ETDEWEB)

    Reynolds, Jacob G. [Washington River Protection Solutions, Richland, WA (United States)

    2013-01-11

    Partial molar properties are the changes occurring when the fraction of one component is varied while the fractions of all other component mole fractions change proportionally. They have many practical and theoretical applications in chemical thermodynamics. Partial molar properties of chemical mixtures are difficult to measure because the component mole fractions must sum to one, so a change in fraction of one component must be offset with a change in one or more other components. Given that more than one component fraction is changing at a time, it is difficult to assign a change in measured response to a change in a single component. In this study, the Component Slope Linear Model (CSLM), a model previously published in the statistics literature, is shown to have coefficients that correspond to the intensive partial molar properties. If a measured property is plotted against the mole fraction of a component while keeping the proportions of all other components constant, the slope at any given point on a graph of this curve is the partial molar property for that constituent. Actually plotting this graph has been used to determine partial molar properties for many years. The CSLM directly includes this slope in a model that predicts properties as a function of the component mole fractions. This model is demonstrated by applying it to the constant pressure heat capacity data from the NaOH-NaAl(OH{sub 4}H{sub 2}O system, a system that simplifies Hanford nuclear waste. The partial molar properties of H{sub 2}O, NaOH, and NaAl(OH){sub 4} are determined. The equivalence of the CSLM and the graphical method is verified by comparing results detennined by the two methods. The CSLM model has been previously used to predict the liquidus temperature of spinel crystals precipitated from Hanford waste glass. Those model coefficients are re-interpreted here as the partial molar spinel liquidus temperature of the glass components.

  20. A crayfish molar tooth protein with putative mineralized exoskeletal chitinous matrix properties.

    Science.gov (United States)

    Tynyakov, Jenny; Bentov, Shmuel; Abehsera, Shai; Yehezkel, Galit; Roth, Ziv; Khalaila, Isam; Weil, Simy; Berman, Amir; Plaschkes, Inbar; Tom, Moshe; Aflalo, Eliahu D; Sagi, Amir

    2015-11-01

    Some crustaceans possess exoskeletons that are reinforced with calcium carbonate. In the crayfish Cherax quadricarinatus, the molar tooth, which is part of the mandibular exoskeleton, contains an unusual crystalline enamel-like apatite layer. As this layer resembles vertebrate enamel in composition and function, it offers an interesting example of convergent evolution. Unlike other parts of the crayfish exoskeleton, which is periodically shed and regenerated during the molt cycle, molar mineral deposition takes place during the pre-molt stage. The molar mineral composition transforms continuously from fluorapatite through amorphous calcium phosphate to amorphous calcium carbonate and is mounted on chitin. The process of crayfish molar formation is entirely extracellular and presumably controlled by proteins, lipids, polysaccharides, low-molecular weight molecules and calcium salts. We have identified a novel molar protein termed Cq-M15 from C. quadricarinatus and cloned its transcript from the molar-forming epithelium. Its transcript and differential expression were confirmed by a next-generation sequencing library. The predicted acidic pI of Cq-M15 suggests its possible involvement in mineral arrangement. Cq-M15 is expressed in several exoskeletal tissues at pre-molt and its silencing is lethal. Like other arthropod cuticular proteins, Cq-M15 possesses a chitin-binding Rebers-Riddiford domain, with a recombinant version of the protein found to bind chitin. Cq-M15 was also found to interact with calcium ions in a concentration-dependent manner. This latter property might make Cq-M15 useful for bone and dental regenerative efforts. We suggest that, in the molar tooth, this protein might be involved in calcium phosphate and/or carbonate precipitation. PMID:26385331

  1. Decision making in third molar surgery: a survey of Brazilian oral and maxillofacial surgeons.

    Science.gov (United States)

    Camargo, Igor Batista; Melo, Auremir Rocha; Fernandes, André Vajgel; Cunningham, Larry L; Laureano Filho, José R; Van Sickels, Joseph E

    2015-08-01

    This study was designed to evaluate the variations in decision making among Brazilian oral and maxillofacial surgeons (OMFS) and trainees in relation to third molar surgery. A survey on 18 diverse clinical situations related to the assessment and treatment of the third molar surgeries was conducted during the 20th Brazilian National OMFS meeting. Participants were divided into three groups according to their level of training. Another variable studied was length of experience. Correlation between the question answers and the variables was analysed using the chi-square test and the f test. The mean age of participants was 32.68 years, and their mean length of experience was 5.24 years. There were no statistical differences between the level of training and number of years of experience and the responses to 15 of the 18 questions on clinical situations. However, differences were found in responses to prophylactic extraction of asymptomatic third molars, use of non-steriodal anti-inflammatory drugs (NSAIDs) during the preoperative surgical period and the use of additional imaging to plan extractions. The group with shorter time of experience (3.8 ± 3.94 years) tended to recommend extractions of asymptomatic third molars more frequently compared with the more experienced surgeons (P = 0.041). More experienced surgeons used NSAIDs in the preoperative surgical period, whereas the majority of the youngest surgeons (4.1 ± 5.96 years of experience) did not (P = 0.0042). The certificated trained and in practice group tended to treat deep lower third molar impactions based on the findings of a panoramic radiograph, without obtaining additional imaging [cone beam computed tomography (CBCT)] before treatment (P = 0.0132). Decision making regarding third molar treatment differs according to the level of training and is influenced by the number of years of experience. Therefore, further continuous education programmes in this area are warranted to make recommendations regarding third molars consistent with the current literature. PMID:25879578

  2. Controlled, rapid uprighting of molars: a surprisingly simple solution the pivot arm appliance.

    Science.gov (United States)

    Warise, T R; Galella, S A

    2000-01-01

    In orthodontic cases where the regional anatomy provides limited room for eruption, there is etiologically a higher occurrence of tipped/impacted second molars. Although second molar extraction with third molar replacement is a useful option, the "Pivot Arm Appliance" encourages the uprighting of the second molar as a preferred treatment. The most unique and important attribute of the "Pivot Arm Appliance" is the rotating tube. In cases of access limitation, the disto-occlusal surface of the molar presents as one area that is accessible. Other features of the "Pivot Arm Appliance" include: The position of the rotator tube delivers optimal rotational force through the pivoting action of the tube/arm complex. The "Pivot Arm Appliance" takes advantage of the efficiency and simplicity of a Class I lever system. The anatomical fulcrum being the dense cortical bone located anterior to the ascending ramus. The vertical spring system is compact, reliable and delivers gentle controlled force in rotational direction. The lingual location of the "Pivot Arm Appliance" does not hinder the function of the tongue, impinge on the soft tissue or interfere with normal masticatory function. The ease of placement of the rotator tube and subsequent insertion of the spring. It is well to note the uprighting appliance provides a very useful and practical approach to the unique problem of severely tipped second molars with limited buccal access. The "Pivot Arm Appliance" does not function only in these situations but can be used in all cases of second molar uprighting of a moderate to severe nature. PMID:12455424

  3. Obturation Over an S1 ProTaper Instrument Fragment in a Mandibular Molar with Three Years of Follow-up

    Scientific Electronic Library Online (English)

    Manoel, Brito-Júnior; Yara Teresinha Correa, Silva-Sousa; João Felipe Bonatto, Bruniera; Carla Cristina, Camilo; André Luis, Faria-e-Silva; Paulo César, Saquy.

    2014-12-01

    Full Text Available Este relato de caso descreve a obturação do canal radicular realizada sobre um grande fragmento da lima ProTaper S1 em um segundo molar inferior com pulpite irreversível. Uma lima ProTaper S1 fraturou durante a instrumentação do canal mésio-vestibular. Aproximadamente 10 mm de remanescente do fragme [...] nto da lima permaneceu nos terços apical e médio do canal. A obturação foi realizada sobre este fragmento usando guta-percha compactada termomecanicamente e cimento endodôntico. Achados radiográficos e ausência de sinais e sintomas clínicos após 3 anos de acompanhamento indicaram o sucesso do tratamento. Imagens de tomografia computadorizada de feixes cônicos revelaram a ausência de lesão periapical e detalhes do fragmento da lima intracanal relacionados à obturação do canal radicular e à morfologia do ápice. Neste caso, a presença de grande instrumento fraturado intracanal não teve impacto negativo no prognóstico endodôntico durante o período de acompanhamento. Abstract in english This case report describes root canal filling performed over a large S1 ProTaper file fragment in a second mandibular molar with irreversible pulpitis. An S1 ProTaper file was fractured during the instrumentation of the mesiobuccal canal. Approximately 10 mm of file fragment remained in the apical a [...] nd middle thirds of the canal. The obturation was performed over this fragment using thermomechanically compacted gutta-percha and sealer. Radiographic findings and the absence of clinical signs and symptoms at 3-year follow up indicated successful treatment. Cone-beam computed tomography images revealed absence of periapical lesion and details of intracanal file fragment related to root fillings and apex morphology. In this case, the presence of a large intracanal fractured instrument did not have a negative impact on the endodontic prognosis during the follow up evaluation period.

  4. Leiomiossarcoma da veia cava inferior: relato de caso / Leiomyosarcoma of the inferior vena cava: a case report

    Scientific Electronic Library Online (English)

    Rafael Lemos, Nascif; Ana Graziela Santana, Antón; Gabriel Lacerda, Fernandes; George Caldas, Dantas; Vinícius de Araújo, Gomes; Marcelo Ricardo Canuto, Natal.

    2014-12-01

    Full Text Available Relatamos um caso de paciente do sexo feminino, 48 anos, com quadro clínico de dor abdominal de moderada intensidade e abaulamento do abdome. Ao exame físico constatou-se massa abdominal palpável. A tomografia computadorizada mostrou volumosa massa retroperitoneal, com realce heterogêneo e íntima re [...] lação com a veia cava inferior. Realizou-se ressecção em bloco da massa e do segmento invadido da veia cava. A histologia revelou leiomiossarcoma. Abstract in english The authors report a case of a 48 year-old female patient with moderate abdominal pain and bulging in the abdomen. Physical examination demonstrated the presence of a palpable abdominal mass. Computed tomography showed a heterogeneously enhancing retroperitoneal mass in close contact with the inferi [...] or vena cava. En bloc resection of the mass and of the attached vena cava segment was performed. Histological analysis revealed leiomyosarcoma.

  5. O pólo inferior do baço de ratos e a oxigenoterapia hiperbárica The splenic inferior pole of rats and hyperbaric oxygen

    Directory of Open Access Journals (Sweden)

    Isabel Cristina Andreatta Lemos Paulo

    2008-02-01

    Full Text Available OBJETIVO: Estudar aspectos funcionais e morfológicos do pólo inferior do baço de ratos tratados ou não com oxigênio hiperbárico no pós-operatório. MÉTODOS: Foram operados 79 ratos, Wistar, pesando 248,7g ± 27 , distribuídos em dois grupos: A - Simulação (n= 40, B - pólo inferior (n=39, e divididos em dois subgrupos: 11 e 70 dias. Cada subgrupo foi subdividido em não tratado com oxigênio hiperbárico (nt (A11nt-n=10, B11 nt-n= 13, A70nt-n= 10, B70nt-n= 9 e tratado (t; A11t-n=10, B11t- n=9, A70 t- n= 10, B70t- n= 8. Foram dosados os lípides e imunoglobulinas e contadas as plaquetas e os corpúsculos de Howell-Jolly no pré e no pós-operatório. O baço e o pólo inferior foram retirados para histologia. RESULTADOS: Houve aumento do colesterol total (p=0,002, VLDL-colesterol e triglicérides (p= 0,003, da LDL-colesterol (p=0,013 no subgrupo B11nt e não houve alteração nos demais subgrupos. A IgM caiu nos subgrupos B11t (p=0,007, B11nt (p= 0,0000, B70nt (p=0,0005 e B70t (p=0,02 e não alterou no grupo simulação. O número de plaquetas aumentou nos subgrupos B11nt (p=0,002, B11t (p=0,01 e não alterou nos demais subgrupos. Os corpúsculos de Howell-Jolly foram menos numerosos no subgrupo B70nt que no B11nt (p=0,019. A viabilidade do pólo inferior foi melhor no subgrupo B11t que no B11nt; no subgrupo B70 que no B11 e não diferiu entre os subgrupos B70t e B70nt. CONCLUSÃO: A função e a viabilidade do pólo inferior remanescente melhoraram tardiamente. Os animais submetidos à oxigenoterapia hiperbárica apresentaram melhor viabilidade e função do pólo inferior precocemente, mas não tardiamente.OBJECTIVE: To study the functional and morphological features of the lower pole of the spleen in rats submitted, or not, to postoperative hyperbaric oxygen therapy. METHODS: Seventy-nine Wistar rats, weighing 248.7 ± 27 g, divided into two groups [group A - simulation (n=40, group B - lower pole (n=39] underwent surgery and were subdivided into two groups: 11 and 70 postoperative days. Each subgroup was subdivided into animals not treated (nt (A11nt, n=10; B11nt, n=13; A70nt, n=10; B70nt, n=9 and treated with hyperbaric oxygen (t (A11t, n=10; B11t, n=9; A70t, n=10; B70t, n=8. Blood was collected for measurement of lipids and immunoglobulins, platelet and Howell-Jolly body count before and after surgery. The spleen and lower pole were removed for histology. RESULTS: There was an increase of total cholesterol (p=0.002, VLDL-cholesterol and triglycerides (p=0.003 and of LDL-cholesterol (p=0.013 in subgroup B11nt, and no alterations were observed in the other subgroups. IgM decreased in subgroups B11t (p=0.007, B11nt (p=0.0000, B70nt (p=0.0005, B70t (p=0.02, and no change was observed in the simulation group. The number of platelets increased in subgroups B11nt (p=0.002 and B11t (p=0.01 and remained unchanged in the other subgroups. Howell-Jolly bodies were less numerous in subgroup B70nt than in subgroup B11nt (p=0.019. Lower pole viability was better in subgroup B11t than in B11nt and in subgroup B70 than in B11, and did not differ between subgroups B70t and B70nt. CONCLUSION: Function and viability of the remaining lower pole improved during the late postoperative period. Viability and function of the lower pole were better during the early but not during the late postoperative period, in animals submitted to hyperbaric oxygen therapy.

  6. Inferior Alveolar Nerve Transposition Using a Piezosurgery Device with Simultaneous Implant Insertion / Transposición del Nervio Alveolar Inferior Utilizando un Dispositivo Piezoeléctrico con Inserción Simultánea de Implantes

    Scientific Electronic Library Online (English)

    Lucas, Martins de Castro-Silva; Marcio, de Moraes; Valfrido Antonio, Pereira-Filho; Mário Francisco, Real Gabrielli.

    Full Text Available Implant rehabilitation of the edentulous mandible tends to be complicated by the presence of bone atrophy. In cases of moderate to severe mandibular atrophy the bone height between the alveolar crest and inferior alveolar nerve (IAN) is small and sometimes limited to only a few millimeters. Implant [...] placement in such situations is very difficult and implies the risk of inferior alveolar nerve damage. Piezosurgery is being recently used as an alternative to obtain greater accuracy and safety. The advantages of using piezosurgery in inferior alveolar nerve transposition are: (a) the lowest risk of injury the IAN; (b) less intraoperative bleeding and reduction of postoperative swelling, (c) less thermal damage the bone surfaces and to the IAN. We present a case of mandibular atrophy in which inferior alveolar nerve transposition and implant placement were carried out using a piezosurgery device

  7. TRAYECTO DEL NERVIO GLUTEO INFERIOR ASOCIADO A LA DIVISION ALTA DEL NERVIO ISQUIATICO INFERIOR GLUTEAL NERVE COURSE ASSOCIATED TO THE HIGH DIVISION OF THE SCIATIC NERVE

    OpenAIRE

    Carla Gabrielli; Enrique Olave; Eduardo Mandiola; Célio F.S. Rodrigues

    1997-01-01

    El nervio glúteo inferior, ramo del plexo sacro, abandona la pelvis pasando generalmente por debajo del músculo piriforme. De este plexo se origina también el nervio isquiático, el cual puede presentar variaciones en su relación con el músculo mencionado, entre ellas, las que se refieren a la división alta del mismo. Sin embargo, son escasos los trabajos que correlacionen esta división con el trayecto del nervio glúteo inferior y su relación con el músculo piriforme. Con el propósito de verif...

  8. Gender Determination Using Diagonal Measurements of Maxillary Molar and Canine Teeth in Davangere Population

    Science.gov (United States)

    Tarigoppula, Ratna Kumari V. N.; Kulkarni, Pavan G; BS, Anil

    2014-01-01

    Background: Mesiodistal and buccolingual measurements of the teeth have been the traditional means of determining gender which sometimes are difficult to measure. Aims and Objectives: To assess the degree of sexual dimorphism in upper permanent canines and first molars using diagonal diameters and to evaluate the applicability of diagonal measurements in sex determination. Materials and Methods: Mesiobuccal-distolingual (MBDL) and distobuccal-mesiolingual (DBML) measurements of the crown and cervix of maxillary canine and maxillary molar were taken using digital vernier callipers in 100 upper dental casts obtained from 50 males and 50 females of the age group of 17-25 y. Results: With step wise discriminant function analysis, results were statistically significant with males showing higher diagonal measurement values. The classification accuracy for males was 69% and in females was 73% with overall accuracy of 71%. Results showed that canines exhibited highest accuracy with cervical measurements being more dimorphic. MBDL measurements were found to be more reliable. Most dimorphicmeasurements included right molar cervical MBDL, left molar cervical MBDL followed by right and left molar crown MBDL. Conclusion: In cases of tooth rotations, crowding, certain fillings and attritions where traditional mesio-distal and bucco-lingual measurements are not applicable, diagonal measurements could be of help in predicting gender. PMID:25584308

  9. The Diagnosis of Choriocarcinoma in Molar Pregnancies: A Revised Approach in Clinical Testing

    Science.gov (United States)

    Duffy, Lisa; Zhang, Liangtao; Sheath, Karen; Love, Donald R.; George, Alice M.

    2015-01-01

    Background Hydatidiform moles occur in approximately 1 in 1,500 pregnancies; however, early miscarriages or spontaneous abortions may not be correctly identified as molar pregnancies due to poor differentiation of chorionic villi. Methods The current clinical testing algorithm used for the detection of hydatidiform moles uses a combination of morphological analysis and p57 immunostaining followed by ploidy testing to establish a diagnosis of either a complete or partial molar pregnancy. We review here 198 referrals for fluorescence in situ hybridization (FISH) ploidy testing, where the initial diagnosis based on morphology is compared to the final diagnosis based on a combination of morphology, FISH and p57 immunohistochemical (IHC) staining. Results Approximately 40% of cases were determined to be genetically abnormal, but only 28.8% of cases were diagnosed as molar pregnancies. The underestimation of complete molar pregnancies and those with androgenetic inheritance was also found to be likely using conventional diagnostic methods, as atypical p57 staining was observed in approximately 10% of cases. Conclusions Our findings suggest that a revised approach to testing products of conception is necessary, with cases screened according to their clinical history in order to distinguish molar pregnancy referrals from hydropic pregnancies. PMID:26566410

  10. Structural Morphology of Molars in Large Mammalian Herbivores: Enamel Content Varies between Tooth Positions

    Science.gov (United States)

    Winkler, Daniela E.; Kaiser, Thomas M.

    2015-01-01

    The distribution of dental tissues in mammalian herbivores can be very different from taxon to taxon. While grazers tend to have more elaborated and complexly folded enamel ridges, browsers have less complex enamel ridges which can even be so far reduced that they are completely lost. The gradient in relative enamel content and complexity of structures has so far not been addressed within a single species. However, several studies have noted tooth position specific wear rates in small mammals (rabbits, guinea pigs) which may be related to individual tooth morphology. We investigate whether differentiated enamel content by tooth position is also to be found in large herbivores. We use CT-scanning techniques to quantify relative enamel content in upper and lower molar teeth of 21 large herbivorous mammal species. By using a broad approach and including both perissodactyls and artiodactyls, we address phylogenetic intraspecific differences in relative enamel content. We find that enamel is highly unevenly distributed among molars (upper M1, M2, M3 and lower m1, m2, m3) in most taxa and that relative enamel content is independent of phylogeny. Overall, relative enamel content increases along the molar tooth row and is significantly higher in lower molars compared to upper molars. We relate this differential enamel content to prolonged mineralisation in the posterior tooth positions and suggest a compensatory function of m3 and M3 for functional losses of anterior teeth. PMID:26313359

  11. Bone resorption in incompletely impacted mandibular third molars and acute pericoronitis

    Directory of Open Access Journals (Sweden)

    Minoru Yamaoka

    2009-04-01

    Full Text Available Minoru Yamaoka, Yusuke Ono, Masahiro Takahashi, Ryosuke Doto, Kouichi Yasuda, Takashi Uematsu, Kiyofumi FurusawaMatsumoto Dental University, School of Dentistry, Shiojiri, Nagano, JapanAbstract: Acute pericoronitis (AP arises frequently in incompletely impacted mandibular third molars, but it remains unknown whether bone resorption in aging is associated with acute inflammation of the third molar. We conducted an experiment to compare the ratio of bone resorption to root length in the distal surface of the second molar (A, the proximal surface (B, and distal surface (C in mesio-angular, incompletely impacted third molars in 27 young and 58 older adults with AP and 77 young and 79 older adults without a history of AP. Bone resorption in A, B, and C in older adults with AP demonstrated a significantly higher ratio when compared to those without AP, whereas there was no difference between those with and without AP in young adults except for B in women. However, there were no differences between bone resorption in B with AP in young and older women, and between bone resorption in C with AP in young and older adults. These indicate that AP and bone resorption are associated with incompletely impacted mandibular third molars in older adults.Keywords: bone resorption, pericoronitis, mandible, acute inflammation, elderly

  12. The incidence of cysts and tumors associated with impacted third molars.

    Science.gov (United States)

    Vigneswaran, A T; Shilpa, S

    2015-04-01

    Incidence of cysts and tumors associated with lower impacted third molars are very low prevalence, which might be because of the fact that most pathologies go unnoticed as many practitioners discard the erupted tissue after surgical removal of the impacted teeth rather than sending the tissue for histopathological examination. Our aim was to evaluate the patients who came for third molar surgical removal with due therapeutic prophylacis and an incidental finding. A proper study protocol both inclusion and exclusion criteria was strictly followed for all the cases, which were included in the study. The period of study was 6 years and the total number of cases assessed were 2778 patients out of which 70 cases reported pathology associated with the impacted third molars. Among 70 cases 61.4% were reported as cyst and tumors and 38.6% of the cases had chronic inflammatory reaction, including two cases with normal dental follicle. High incidence rate of pathology associated with third molar occurred between age group of 20 and 30 years older age groups showed very low incidence. Most common site of impaction was found to be left side of mandible and positions were vertical and distoangular impactions. Thus was male predominance in the younger groups. The examination is necessary whether the third molars impacted cases were symptomatic or asymptomatic. PMID:26015725

  13. An in vitro assessment of type, position and incidence of isthmus in human permanent molars

    Scientific Electronic Library Online (English)

    Fernando José Camello de, LIMA; Francisco, MONTAGNER; Rogério Castilho, JACINTO; Glaucia Maria Bovi, AMBROSANO; Brenda Paula Figueiredo de Almeida, GOMES.

    2014-07-01

    Full Text Available Root canal anatomical complexities, such as isthmus, may limit the action of the endodontic instruments, irrigant solutions and intracanal medications, leading to endodontic treatment failure. Objectives: This in vitro study assessed the type, position and incidence of isthmus in human permanent mo [...] lars. Material and Methods: One hundred and twenty eight upper and lower first and second permanent molars were analyzed. The roots were embedded in transparent resin, and then split at different distances from the apex (1.0-2.5-4.0-5.5-7.0 mm). Following the sample examination in stereomicroscope, the data were submitted to chi-square statistical test at a 5% significance level. Results: The highest isthmus incidence was at 7.0 mm from the root apex in all samples, except the distal root of lower molars (at 5.5 mm). In upper and lower molars, type V (complete isthmus with a continuous opening between the two main root canals) was the most common classification of isthmus (28.8%). In the mesial root of first and second mandibular molars, type IV had the highest incidence (36% and 23.9%, respectively). Conclusion: It was concluded that isthmus was widely found in flat roots, with a low percentage in areas close to the apex. In upper and lower molars, these structures were most frequently found at 7 mm from the apex.

  14. The standard partial molar entropy of the aqueous tetra-n-butylammonium cation

    International Nuclear Information System (INIS)

    The standard partial molar entropy of the aqueous tetrabutylammonium cation, not known previously, has now been obtained, based on the molar entropy of two of its crystalline salts, the iodide and the tetraphenylborate, recently determined experimentally for this purpose. The calculation required also published molar enthalpies of solution and solubilities of these two salts as well as of the perchlorate. The choice of the anions depended mainly on the limited solubilities of the examined salts in water, facilitating the estimation of the relevant activity coefficients. The result is S?(Bu4N+, aq) = (380 ± 20) J . K-1 . mol-1 at T = 298.15 K, on the mol . dm-3 scale and based on S?(H+, aq) = (-22.2 ± 1.2) J . K-1 . mol-1 (yielding the 'absolute' value). The molar entropy of this cation in the ideal gas standard state, S0(Bu4N+, g) = (798 ± 8) J . K-1 . mol-1 then yielded the molar entropy of hydration ?hydS? (Bu4N+) = (-418 ± 23) J . K-1 . mol-1

  15. Structural Morphology of Molars in Large Mammalian Herbivores: Enamel Content Varies between Tooth Positions.

    Science.gov (United States)

    Winkler, Daniela E; Kaiser, Thomas M

    2015-01-01

    The distribution of dental tissues in mammalian herbivores can be very different from taxon to taxon. While grazers tend to have more elaborated and complexly folded enamel ridges, browsers have less complex enamel ridges which can even be so far reduced that they are completely lost. The gradient in relative enamel content and complexity of structures has so far not been addressed within a single species. However, several studies have noted tooth position specific wear rates in small mammals (rabbits, guinea pigs) which may be related to individual tooth morphology. We investigate whether differentiated enamel content by tooth position is also to be found in large herbivores. We use CT-scanning techniques to quantify relative enamel content in upper and lower molar teeth of 21 large herbivorous mammal species. By using a broad approach and including both perissodactyls and artiodactyls, we address phylogenetic intraspecific differences in relative enamel content. We find that enamel is highly unevenly distributed among molars (upper M1, M2, M3 and lower m1, m2, m3) in most taxa and that relative enamel content is independent of phylogeny. Overall, relative enamel content increases along the molar tooth row and is significantly higher in lower molars compared to upper molars. We relate this differential enamel content to prolonged mineralisation in the posterior tooth positions and suggest a compensatory function of m3 and M3 for functional losses of anterior teeth. PMID:26313359

  16. Configuración anatómica del sistema canalicular de la raíz mesiovestibular del primer molar maxilar / Anatomical configuration of canalicular system in mesiobuccal root of maxillary first molar

    Scientific Electronic Library Online (English)

    P., Betancourt; S., Aracena Rojas; P., Navarro Cáceres; R., Fuentes.

    2015-02-01

    Full Text Available Introducción: El primer molar maxilar permanente es el diente que presenta mayor complejidad y variación morfológica, que se refleja en la más alta tasa de fracaso clínico. Las principales causas de su fracaso en el tratamiento endodóntico es la imposibilidad de localizar el canal mesiovestibular se [...] cundario y el desconocimiento de su morfología. El objetivo de este estudio fue determinar, in vitro, la configuración del canal MB2 presente en la raíz mesiovestibular del primer molar maxilar, mediante radiografías periapicales. Material y métodos: Se seleccionaron 62 primeros molares maxilares. Se procedió a tomar radiografías iniciales periapicales de cada diente en sentido mesiodistal y vestíbulo-palatino. Los molares fueron trepanados y los canales fueron permeabilizados. Para evidenciar la anatomía de los canales radiculares, se posicionó en el canal MB1 una lima Headstrom nº 0,8 o 10 y en el canal MB2 una lima k-flex nº 0,8 o 10. Los especímenes fueron sometidos a una radiografía periapical, en sentido mesiodistal y vestíbulo-palatino. Resultados: El 30,38% de los dientes presentó un sistema de canales tipo I, 41,07% correspondió al tipo II, un 28,57% al tipo III y un 0% al tipo IV. La frecuencia del canal mesiovestibular secundario fue de un 69,64%. Discusión: El clínico debe tener la convicción de realizar la exploración en búsqueda del canal MB2, logrando un adecuado acceso endodóntico que permita una visualización correcta, utilizar herramientas como el microscopio, ultrasonido o TCHC para su detección y estudio morfológico. Abstract in english Introduction: Permanent maxillary first molar is the tooth that presents the most complex morphological variation, which is reflected in a higher rate of clinical failure. One of the main causes of endodontic treatment failure is the inability to locate the secondary mesiobuccal canal and the ignora [...] nce of their morphology. The aim of this study was to determine, in vitro, the configuration of MB2 canal present in the mesiobuccal root of the first maxillary molar, through periapical radiographs. Methods: Sixty-two maxillary first molars were selected. After this, we proceeded to take initial periapical radiographs of each tooth in mesio-distal and bucco-palatal faces. The molars were approached until pulp chamber and canals were permeabilized. In order to demonstrate the anatomy of root canals, a Hedstrom file nº 0,8 or 10 was positioned over the MB1 canal and a K- flex file nº 0,8 or 10 over the MB2 canal. Specimens were subjected to a periapical radiograph as a final control in the same mesio-distal and bucco-palatal faces. Results: 30,38% of teeth had type I canal system, 41,07% were type II, 28,57% had type III and 0% type IV. The frecuency of the second mesiobuccal canal was 69,64%. Discussion: The clinician must be satisfied to perform exploration in search of MB2 canal, making an adequate endodontic access to allow a correct display, to use tools like microscope, ultrasound or TCHC for its detection and morphological study.

  17. Patient's perception on mini-screws used for molar distalization / Percepção dos pacientes quanto ao uso de mini-implantes para distalização de molares

    Scientific Electronic Library Online (English)

    Micéli Guimarães, Blaya; Diego Segatto, Blaya; Magáli Beck, Guimarães; Luciana M., Hirakata; Marcela, Marquezan.

    Full Text Available OBJETIVO: O objetivo desse estudo foi avaliar e comparar a intensidade de dor, os efeitos colaterais e o desconforto sentido pelo paciente relacionado à colocação do mini-implante, durante a mecânica e na remoção do mesmo, durante a distalização de molares no tratamento ortodôntico. MÉTODOS: A amost [...] ra foi composta por 30 pacientes adultos com uma média de idade de 30 anos, com maloclusão Classe II subdivisão direita ou esquerda. Um mini-implante foi instalado em cada paciente, no arco superior para conseguir a distalização de molar. Os pacientes receberam um questionário a respeito de sua opinião sobre o tratamento. RESULTADOS: Noventa por cento dos pacientes escolheram colocar os mini-implantes ao invés de realizar extração de molares (camuflagem ortodôntica), fazer o uso de um aparelho extraoral (Aparelho extraoral de Kloehn) ou fazer uso de qualquer outro tratamento alternativo para classe II. A úlcera aftosa foi o efeito colateral com a maior incidência após a inserção do mini-implante (30%). O maior desconforto foi sentido durante a infiltração anestésica (27%), embora 23% relataram não ter sentido desconforto durante o tratamento. Um total de 83% dos pacientes não relatou dor durante o tratamento, o que pode ser associado com o grau de satisfação com o tratamento (100%) e a recomendação desse procedimento a outros pacientes (100%). CONCLUSÃO: Os mini-implantes foram bem aceitos pelos pacientes e foram eficientes para a distalização de molares quando utilizados em associação com o tratamento ortodôntico para correção da maloclusão de Classe II. Abstract in english PURPOSE: The objective of this study was to evaluate and compare the perceived pain intensity, side effects and discomfort related to the moment of placement, during mechanics and removal of a mini-screw for molar distalization in orthodontic treatment. METHODS: The sample consisted of 30 adult pati [...] ents with a mean age of 30 years old, with class II malocclusion subdivision right or left. A mini-screw was installed in each patient, in the maxillary arch to provide a molar distalization. The patients answered a questionnaire to assess their opinions on the treatment. RESULTS: Ninety percent of the patients chose mini-screws over pre-molar extraction (orthodontic camouflage), or the use of an extra-oral appliance (Kloehn cervical traction) or another non-compliance treatment to class II. Aphthous ulcer was the side effect most frequent after placement of the mini-screw (30%). The greatest discomfort was felt during infiltration anesthesia (27%), though 23% reported no discomfort during placement. Eighty-three percent of the patients reported no pain during placement, which may be associated with the degree of satisfaction with the treatment (100%) and recommendation of the procedure to other patients (100%). CONCLUSION: Mini-screws were well accepted by the patients and were efficient for molar distalization when utilized in association with orthodontic treatment for Class II malocclusion.

  18. Agenesia del Tercer Molar en una Etnia Originaria del Norte de Chile: Aymaras Third Molar Agenesis in Native Ethnia from North of Chile: Aymaras

    OpenAIRE

    Fernando García-Hernández; Víctor Javier Beltrán Varas

    2009-01-01

    Agenesia es la ausencia de dientes por alteraciones genéticas aisladas o sindrómicas. La agenesia del tercer molar está asociada a malformaciones y es considerada por diversos autores consecuencia de la evolución humana (Larmour et al, 2005). Son los dientes con mayor prevalencia de agenesia junto con segundos premolares e incisivos laterales (Fuller & Denehy, 1984). La prevalen-cia varía entre 9% y 37% (McNamara & Foley, 2006), en tanto Arboleda et al. (2006) señalan una prevalencia del 20%....

  19. Multiple Abnormal Unerupted Mandibular Permanent Molar Teeth: A Case Report Molares Mandibulares Anormales No-Erupcionados Múltiples: Reporte de un Caso

    OpenAIRE

    Umit Karacayli; Nuket Gocmen-Mas

    2009-01-01

    Abnormal multiply unerupted permanent molars have long received the attention of anatomists and maxillofacial surgeons besides the other developmental teeth anomalies. This paper presents a clinical case of a 23-year-old male patient who was admitted to the department of maxillofacial surgery in faculty of dentistry in Gulhane Medical School with a six month history of pain at the rest position and during chewing and also tender on his right corpus of mandible. The impaction which resulted in...

  20. Tercer molar superior retenido en seno maxilar. Presentación de un caso / Third Upper Molar Retained in Maxillary Sinus. Presentation of a Case

    Scientific Electronic Library Online (English)

    Alexis Andrés, Amador Velázquez; Hung Quevedo, Orlando Alberto; Deyanira, Menéndez Díaz.

    2015-03-01

    Full Text Available Se presentó una paciente de 38 años de edad, mestiza, la cual acudió a Consulta de Cirugía Maxilofacial del Hospital Lenin remitida del Servicio de Neurocirugía, que refirió ser objeto de varios estudios de cráneo (incluyendo TAC) por presentar cefaleas mantenidas de moderada a gran intensidad. Los [...] resultados de los estudios fueron negativos. Refirió que recibió tratamiento farmacológico para aliviar los síntomas dolorosos, además, describió otros signos y síntomas como: caída del cabello, afectaciones visuales del lado derecho (visión borrosa, molestias), dolor facial difuso y edema en hemicara derecha. Al examen físico nada a señalar, con rayos x de senos paranasales se diagnosticó la presencia de un tercer molar incluido en seno maxilar derecho. La paciente fue llevada al salón de forma electiva y mediante la técnica de Caldwell-Lud fue extraído dicho molar. La paciente evolucionó de manera favorable. Abstract in english A 38-year-old black, which came to Consultation of Maxillofacial Surgery at Lenin Hospital, from Neurosurgery Department was reported in this paper. The patient was referred to study due to be the subject of several studies of skull (including TAC) due to headaches maintained from moderate to high i [...] ntensity. The results of the studies were negative. The patient received drug treatment to relieve the painful symptoms also described other signs and symptoms such as hair loss, visual detriment to the right side (blurred vision, discomfort), diffuse facial pain and swelling in right side of the face. Physical examination revealed nothing to indicate, with sinus x-rays the presence of a third molar in the right maxillary sinus was diagnosed. The patient was taken to the room and through elective Caldwell-Lud technique, the molar was extracted. The patient progressed favorably.

  1. Tercer Molar Ectópico Impactado en Zona Retromolar: Reporte de Caso Ectopic and Impacted Third Molar in Retromolar Zone: A Case Report

    Directory of Open Access Journals (Sweden)

    Ramón Fuentes Fernández

    2009-03-01

    Full Text Available El desarrollo dentario resulta de una complicada interacción entre el epitelio oral y el tejido mesenquimático subyacente. La interacción anormal de tejidos en este período podría resultar en el desarrollo y erupción de un diente ectópico. Terceros molares incluidos son una de las patologías más frecuentes encontradas en cirugías oral y maxilofacial. Su evaluación generalmente es radiográfica, y los de ubicación mesioangular son los más prevalentes en la mandíbula. El presente reporte muestra un caso clínico de tercer molar incluido en la región retromolar mandibular. El diagnóstico se efectuó durante una evaluación por medio del análisis de una ortopantomografía en un paciente de sexo femenino de 51 años de edad. La pieza estaba ubicada en la zona retromolar mandibular derecha inmediatamente subcortical. Dado que se encontraba asintomática, sin signos radiográficos ni clínicos de patología, no fue indicada la exodoncia; sin embargo, es importante considerar esta variación anatómica y una posible resolución quirúrgica de ella ante la posible rehabilitación protésica del área.Tooth develop results of several interactions between oral epithelium end underlying mesenchymatic tissue during odontogenesis. Abnormal relation of tissues could result in develop and eruption of an ectopic tooth. Impacted third molars are a frequent pathology in oral and maxillofacial surgery, it evaluation is commonly radiographic, and the most frequent position in jaw bone is mesioangular. This report wants to show an impacted third molar in mandibular retromolar region. Diagnosis was done through a orthopantomographic study during a clinical evaluation of 51 years of age female patient. Teeth was found sub cortical of right retromolar zone. Considering patient did not related or shown clinical signs of pathology, and radiograph neither had disease compatible signs, was resolved do not proceed to extraction. However, is important to consider this anatomical variation and a possible surgical resolution if a prosthetic rehabilitation of this area.

  2. Thermodynamic properties of binary mixtures of tetrahydropyran with pyridine and isomeric picolines: Excess molar volumes, excess molar enthalpies and excess isentropic compressibilities

    International Nuclear Information System (INIS)

    Research highlights: ? Densities, ? and speeds of sound, u of tetrahydropyran (i) + pyridine or ?-, ?- or ?-picoline (j) binary mixtures at 298.15, 303.15 and 308.15 K and excess molar enthalpies, HE of the same set of mixtures at 308.15 K have been measured as a function of composition. ? The observed densities and speeds of sound values have been employed to determine excess molar volumes, VE and excess isentropic compressibilities, ?SE. ? Topology of the constituents of mixtures has been utilized (Graph theory) successfully to predict VE, HE and ?SE data of the investigated mixtures. ? Thermodynamic data of the various mixtures have also been analyzed in terms of Prigogine-Flory-Patterson (PFP) theory. - Abstract: Densities, ? and speeds of sound, u of tetrahydropyran (i) + pyridine or ?-, ?- or ?- picoline (j) binary mixtures at 298.15, 303.15 and 308.15 K and excess molar enthalpies, HE of the same set of mixtures at 308.15 K have been measured as a function of composition using an anton Parr vibrating-tube digital density and sound analyzer (model DSA 5000) and 2-drop micro-calorimeter, respectively. The resulting density and speed of sound data of the investigated mixtures have been utilized to predict excess molar volumes, VE and excess isentropic compressibilities, ?SE. The observed data have been analyzed in terms of (i) Graph theory; (ii) Prigogine-Flory-Patterson theory. It has been observed that VE, HE and ?SE data predicted by Graph theory compare well with their experimental values.

  3. Thermodynamic studies of molecular interactions in mixtures of o-toulidine with pyridine and picolines: Excess molar volumes, excess molar enthalpies, and excess isentropic compressibilities

    International Nuclear Information System (INIS)

    Research highlights: ? Excess molar enthalpies, HE data of o-toluidine (i) + pyridine or ?-, ?-, or ?-picoline (j) binary mixtures at a temperature of 308.15 K; densities, ? and speeds of sound, u of the same mixtures at a temperature of 308.15 K have been measured over entire mole fraction range. ? The experimental densities and speeds of sound results have been utilized to determine excess molar volumes, VE and excess isentropic compressibilities, ?SE of the investigated mixtures. ? Connectivity parameter of third degree of a molecule (which in turn depends upon its topology) have been employed successfully (Graph theory) to determine excess properties of the studied ternary mixtures. ? The observed VE, HE and ?sE data of the investigated mixtures have also been analyzed in terms of Prigogine-Flory-Patterson (PFP) theory. - Abstract: Excess molar enthalpies, HE data of {o-toluidine (i) + pyridine or ?-, ?-, or ?-picoline (j)} binary mixtures at a temperature of 308.15 K; densities, ? speeds of sound, u of the same mixtures at a temperature of (298.15, 303.15, and 308.15) K have been measured over entire mole fraction range. The measured densities and speeds of sound data have been utilized to determine excess molar volumes, VE and excess isentropic compressibilities, ?sE of the investigated mixtures. The VE, HE, and ?SE data of the studied mixtures have been analyzed in term of (i) Graph theory and (ii) Prigogine-Flory-Patterson theory. Analysis of VE data in terms of Graph theory suggest that (i + j) mixtures are characterized by interaction between nitrogen and carbon atoms of pyridine or substituted pyridine (?-, ?-, or ?-picoline) with hydrogen atom and ?-electron cloud of aromatic ring of o-toluidine to form i; j molecular complex. The IR studies lend additional support to the proposed molecular entities in (i + j) mixtures. It has been observed that VE, HE, and ?SE values predicted by Graph theory compare well with their corresponding experimental values.

  4. [Realization of algorithm on finishing optimization-tool-path generation for high-speed machining molar crown].

    Science.gov (United States)

    Sun, Quanping; Chen, Xiaogang; Chen, Qianliang; Dai, Ning; Liao, Wenhe; He, Ning

    2009-10-01

    Molar crown is very small and has not only thin-wall, but also complex profile, especially, the occlusal surface of each molar crown has many cusps, ridges and fossae being differently distributed. When conventional processing method is used, it is impossible to machine molar prosthesis rapidly and exactly. To enhance machining velocity and improve the surface precision of molar crown, an algorithm of entity rapid offset-based STL format is put forward. By the application of Zigzag toolpath planning and micro-machining cutter, the finishing toolpaths for high speed milling molar prosthesis are generated. In terms of Mikron UCP800 high-speed machine center, the molar all-crown made of alloy aluminum material is successfully machined. The test results show that the algorithm of tool-path generation works fast, the number of toolpaths is small, and the cutter feeds smoothly. PMID:19947500

  5. Avaliação do espaço adicional requerido no perímetro do arco inferior para o nivelamento da curva de Spee Assessment of the additional lower arch perimeter needed for leveling the curve of Spee

    Directory of Open Access Journals (Sweden)

    Marcio José da Silva Campos

    2009-08-01

    Full Text Available OBJETIVO: determinar o perímetro de arco adicional necessário para o nivelamento da curva de Spee através de uma técnica laboratorial em modelos de estudo. MÉTODOS: foram utilizados 70 modelos inferiores nos quais se mediu a profundidade da curva de Spee e o perímetro do arco (de segundo molar a segundo molar. Nos mesmos modelos, após a simulação do nivelamento da curva de Spee, o perímetro de arco foi novamente avaliado, mantendo sua forma e comprimento. RESULTADOS: foi confirmada a correlação entre a profundidade da curva de Spee e o perímetro de arco adicional, sendo deduzida a fórmula [Paa = 0,21 CSmax - 0,04]. CONCLUSÃO: a técnica proposta permitiu, através da avaliação do perímetro de arco com curva de Spee nivelada, a determinação do espaço disponível para o alinhamento dentário.AIM: To determine the additional arch perimeter needed for leveling the curve of Spee by means of a laboratory technique using dental casts. METHODS: Seventy lower dental models were used for measuring the depth of the curve of Spee and assessing the arch perimeter from second molar to second molar. In these dental casts, after simulation of leveling the curve of Spee, arch perimeter was reevaluated, after maintaining its form and length. RESULTS: The correlation between the depth of the curve of Spee and the additional arch perimeter was ratified, as can be shown by the formula [Paa = 0,21 CSmax - 0,04]. CONCLUSION: The proposed technique allowed, through the assessment of the arch perimeter with the leveled curve of Spee, the determination of the space available for tooth alignment.

  6. Autotransplantation of Immature Third Molars and Orthodontic Treatment After En Bloc Resection of Conventional Ameloblastoma.

    Science.gov (United States)

    Osterne, Rafael Lima Verde; Moreira Neto, José Jeová Siebra; de Araújo Lima, Augusto Darwin Moreira; Nogueira, Renato Luiz Maia

    2015-09-01

    Ameloblastoma treatment can lead to significant bone defects; consequently, oral rehabilitation can be challenging. We present the case of a 14-year-old girl diagnosed with a conventional ameloblastoma in the mandible who was treated using en bloc resection and rehabilitated with autotransplantation of the immature third molars and orthodontic treatment. The lesion was in the region of the lower left canine and premolars, and en bloc resection resulted in a significant alveolar bone defect. Autotransplantation of the lower third molars to the site of the lower left premolars was performed. After 2 years, the upper left third molar was transplanted to the site of the lower left canine. During the orthodontic treatment period, considerable alveolar bone formation was observed in the region of the transplanted teeth, and roots developed. To the best of our knowledge, this is the first reported case of alveolar bone formation induction caused by tooth transplantation after ameloblastoma treatment. PMID:26044604

  7. Extrapolation of hydrogen molar volumes by the virial equation on wide pressure and temperature intervals

    International Nuclear Information System (INIS)

    A virial equation was used for approximation of experimental molar volumes at high and low pressures for experimental temperatures. It was shown that the virial equation can be used for wide pressure and temperature intervals in distinction of the Tait, logarithm and other equations. The obtained under fitting of experimental data virial parameters were used for their following extrapolations on wide temperature intervals. The direct solution of the third order linear virial equations relative to molar volumes using the Kardano or Newton methods was employed for extrapolation of experimental dependences from high pressure to low pressure and from low pressure to high and superhigh pressures. A quite good agreement between experimental values of molar volumes versus pressures and extrapolating ones allows one to conclude that for a definite temperature interval with high probability and proof it is possible to make extrapolations on superhigh pressures

  8. Accessory Central Cusp in the Maxillary Second Primary Molars: A Rare Entity among the Rare.

    Science.gov (United States)

    Chandra, Biswaroop; Das, Monalisa

    2014-01-01

    Central accessory cusp in primary molars is an extremely rare condition which is due to abnormal proliferation and folding of inner enamel epithelium during morphodifferentiation stage of tooth development. The extension of the pulp in the cuspal area is often the reason for early involvement of pulp by the caries process. Therefore, early diagnosis and treatment planning is necessary to maintain the integrity of primary dental arch. This article reports such a case of central accessory cusps involving maxillary second primary molars. How to cite this article: Chandra B, Das M. Accessory Central Cusp in the Maxillary Second Primary Molars: A Rare Entity among the Rare. Int J Clin Pediatr Dent 2014;7(3):202-205. PMID:25709302

  9. A SEM investigation of accessory foramina in the furcation areas of primary molars.

    Science.gov (United States)

    Kramer, Paulo Floriani; Faraco Júnior, Italo Medeiros; Meira, Raquel

    2003-01-01

    The purpose of this study was to determine the prevalence and anatomic characteristics of accessory foramina in the external and internal furcation areas of primary molars. Sixty human primary molars were divided into two equal groups. The teeth of the experimental group showed in previous radiographic examination the presence of a radiolucency area confined to the inter-radicular region, while the teeth of the control group had no sign of pulpal inflammation in the clinical and/or radiographic examination. The specimens were observed by scanning electron microscope (SEM). The external furcation area (EFA) showed a higher prevalence of accessory foramina than the internal furcation area (IFA) (P0.05). The presence of accessory canals should not be considered the only reason for inter-radicular pathological bone resorption following pulpal necrosis in deciduous molars. PMID:12597688

  10. Mandibuler üçüncü molar di?te idiyopatik kök rezorpsiyonu: vaka raporu

    Directory of Open Access Journals (Sweden)

    Fahrettin Goze

    2011-11-01

    Full Text Available

    Idiopathic resorption is rare form of external resorption, usually with no sign and was generally diagnosed as a chance finding during radiographic examination. This paper describes a rare case of idiopathic external root resorption at apical region of mesial root of mandibular third molar tooth. No significant systemic, dental, or familial findings could be identified as a possible cause.

    ÖZET

    ?diyopatik rezorpsiyon, eksternal rezorpsiyonun nadir görülen bir formudur, genellikle semptomsuzdur ve radyografide tesadüfen te?his edilir. Bu makalede mandibuler üçüncü molar di?in mezial kökünün apikal bölgesinde geli?en idiyopatik kök rezorpsiyonu vakas? sunulmaktad?r. Hastan?n di?inde rezorpsiyona sebep olabilecek dental veya sistemik bir patolojik durum tespit edilemedi. Ailede böyle bir patolojiye rastlanmad?.

    Anahtar kelimeler: ?diyopatik kök rezorpsiyonu, mandibuler üçüncü molar di?, eksternal rezorpsiyon

  11. Holocellulose Nanofibers of High Molar Mass and Small Diameter for High-Strength Nanopaper.

    Science.gov (United States)

    Galland, Sylvain; Berthold, Fredrik; Prakobna, Kasinee; Berglund, Lars A

    2015-08-10

    Wood cellulose nanofibers (CNFs) based on bleached pulp are different from the cellulose microfibrils in the plant cell wall in terms of larger diameter, lower cellulose molar mass, and modified cellulose topochemistry. Also, CNF isolation often requires high-energy mechanical disintegration. Here, a new type of CNFs is reported based on a mild peracetic acid delignification process for spruce and aspen fibers, followed by low-energy mechanical disintegration. Resulting CNFs are characterized with respect to geometry (AFM, TEM), molar mass (SEC), and polysaccharide composition. Cellulose nanopaper films are prepared by filtration and characterized by UV-vis spectrometry for optical transparency and uniaxial tensile tests. These CNFs are unique in terms of high molar mass and cellulose-hemicellulose core-shell structure. Furthermore, the corresponding nanopaper structures exhibit exceptionally high optical transparency and the highest mechanical properties reported for comparable CNF nanopaper structures. PMID:26151837

  12. Tracking the urinary excretion of high molar mass poly(vinyl alcohol).

    Science.gov (United States)

    Besheer, Ahmed; Mäder, Karsten; Kaiser, Sergej; Kressler, Jörg; Weis, Christine; Odermatt, Erich K

    2007-08-01

    The fate of poly(vinyl alcohol) (PVA) of weight average molar mass of 125,000 g/mol after administration into the peritoneum of rabbits has bean studied by various methods. PVA was spin-labeled with a nitroxide radical and then detected in urine using electron spin resonance (ESR) spectroscopy. Furthermore, unlabeled polymer was also administered to rabbits, then the urine was collected, dialyzed, precipitated, and the excretion of PVA was confirmed by size exclusion chromatography (SEC), FTIR spectroscopy, and (1)H NMR spectroscopy. ESR and SEC results show that, despite its relatively high molar mass, PVA is excreted through the kidneys without significant molar mass changes. Nevertheless, NMR and FTIR spectra show slight differences between the excreted and neat PVA. Possible causes of these discrepancies are discussed. PMID:17238166

  13. Continuously Growing Rodent Molars Result from a Predictable Quantitative Evolutionary Change over 50 Million Years

    Directory of Open Access Journals (Sweden)

    Vagan Tapaltsyan

    2015-05-01

    Full Text Available The fossil record is widely informative about evolution, but fossils are not systematically used to study the evolution of stem-cell-driven renewal. Here, we examined evolution of the continuous growth (hypselodonty of rodent molar teeth, which is fuelled by the presence of dental stem cells. We studied occurrences of 3,500 North American rodent fossils, ranging from 50 million years ago (mya to 2 mya. We examined changes in molar height to determine whether evolution of hypselodonty shows distinct patterns in the fossil record, and we found that hypselodont taxa emerged through intermediate forms of increasing crown height. Next, we designed a Markov simulation model, which replicated molar height increases throughout the Cenozoic and, moreover, evolution of hypselodonty. Thus, by extension, the retention of the adult stem cell niche appears to be a predictable quantitative rather than a stochastic qualitative process. Our analyses predict that hypselodonty will eventually become the dominant phenotype.

  14. Tuning of magnetic properties in cobalt ferrite by varying Fe+2 and Co+2 molar ratios

    International Nuclear Information System (INIS)

    Different grades of magnetic cobalt ferrite (CoFe2O4) nanoparticles were synthesized with various molar ratios of Fe+2 to Co+2 ions in the initial salt solutions by the co-precipitation method. The crystal structure and morphology of the nanoparticles are obtained from X-ray diffraction and transmission electron microscopy studies. Fourier transform infrared spectroscopy analysis exhibited the Fe–O stretching vibration ?540 cm?1, confirming the formation of metal oxide. The magnetic studies demonstrate that all of the nanoparticles are superparamagnetic at 300 K. The saturation magnetization and coercivity of the CoFe2O4 nanoparticles are affected by the molar ratios of Fe+2 to Co+2 ions. Among all the synthesized nanoparticles, the system with 75:25 molar ratio of Fe+2 to Co+2 ions with a particle size of 13 nm showed a high magnetization of 90 emu/g

  15. Partial molar volumes of hydrogen and deuterium in niobium and vanadium

    International Nuclear Information System (INIS)

    Lattice dilation studies and direct pressure experiments gave comparable values for the partial molar volumes of hydrogen and deuterium in niobium and vanadium. Small isotope effects in the partial molar volume of hydrogen were measured in both metals by the differential isotope method. Hydrogen had a larger partial molar volume than deuterium in niobium, but the reverse was true in vanadium. The isotope effect measured in niobium can be represented as being due to the larger amplitude of vibration of the hydrogen atom than the deuterium atom in the metal lattice. Since hydrogen has a larger mean displacement from the equilibrium position than does deuterium, the average force hydrogen exerts on the metal atoms is greater than the force deuterium exerts. The isotope effect in vanadium is likely a result of anharmonic effects in the lattice and local vibrational modes

  16. An Anatomical Study of the Inferior Oblique Muscle with Emphasis on Its Nerve Entry

    Directory of Open Access Journals (Sweden)

    B.V. Murlimanju

    2011-06-01

    Full Text Available Background: Anatomical studies regarding the inferior oblique muscle are scarce and theexact location of the entry of oculomotor nerve to the muscle has not beenreported. In the present study, the objectives were to examine the exact location of the entry of oculomotor nerve to the inferior oblique muscle and tostudy the topographical anatomy of the muscle.Methods: The study included 56 intact orbits from 28 embalmed south Indian adultcadavers. The entire course of the nerve to the inferior oblique was exposedfrom both anterior and posterior aspects in all specimens. The exact locationof the entry of nerve supplying the inferior oblique muscle was identified andthe distances of the muscle from inferior and medial orbital margins weremeasured.Results: The oculomotor nerve entered the inferior oblique muscle through the orbitalsurface in 42 (75% cases, through the ocular surface in 10 (17.9% casesand through the posterior border in 4 (7.1% cases. The distance of the muscle from the inferior orbital margin was 1 mm in majority (78.5% of thecases. The distance of the muscle from the medial orbital margin was 11 mmin majority (42.8% of the cases.Conclusion: The present study reports that the oculomotor nerve most often enters theinferior oblique muscle through its orbital surface. Detailed knowledge of thetopographical anatomy of inferior oblique muscle and its site of nerve entryare essential for surgeons when performing ophthalmological surgery andregional anesthesia.

  17. Anterior-inferior capsular length insufficiency in the painful shoulder.

    Science.gov (United States)

    Hjelm, R; Draper, C; Spencer, S

    1996-03-01

    Our clinic's initial attempts to document shoulder capsular laxity made us increasingly aware of the presence of subtle restricted passive shoulder movement in patients with a variety of shoulder diagnoses. The purpose of this study is to describe the evaluation, physical therapy treatment, pathomechanics, and implications of a continuum of anterior-inferior capsular length insufficiency and shoulder pain. One hundred fifty-six patients with the diagnoses of shoulder pain, impingement, rotator cuff tendinitis, and frozen shoulder were found to have capsular length insufficiency and were treated by mobilization techniques deemed as manual decompression. Eighty-three percent displayed good to excellent outcomes for decreasing pain, increasing range of motion, and meeting functional goals. Recent literature has supported the concept that capsular ligaments not only provide restraint, but are specifically oriented to guide and center the humeral head on the glenoid during shoulder movements. These patients presented with abnormal glenohumeral mechanics due to anterior capsular ligament length insufficiency. Glenohumeral ligament length insufficiency can be the primary cause of shoulder pain, ranging from frozen shoulder to impingement-like symptoms. Proper capsular ligament length can be restored with manual techniques. All patients with shoulder pain should have capsular ligament length assessment to ensure proper glenohumeral mechanics. PMID:8919401

  18. Doppler ultrasonographic imaging of obstruction of inferior vena cava

    International Nuclear Information System (INIS)

    Budd-Chiari syndrome is a rare condition caused by hepatic venous outflow obstruction. Although liver biopsy and venography have been considered to be conclusive in the diagnosis of Budd-Chiari syndrome, those procedures involve a great deal of disecomfort and risk for the patient. As the recently developed Doppler ultrasonography is able to define the direction of blood flow and measure the blood flow velocity and volume in the portal vein, inferior vena cava(IVC) and hepatic vein, it can be used in the diagnosis of Budd-Chiari syndrome. We analyzed Doppler ultrasonographic findings in two patients with membraneous obstruction of the IVC, suspected from Doppler ultrasonographic findings and confirmed by venocavography. Doppler ultrasonography demonstrated reversed laminar flow on inspiration and no significant flow on expiration in the dilated IVC proximal to the stenosis and turbulent flow in the proximal portion of the stenosis. After balloon dilatation, the flow was changed and directed normally. These findings correlated very well with venocavographic findings. Our results suggest that Doppler ultrasonography is a simple, non-invasive and effective method for the initial evaluation of patients suspected of having obstruction of the IVC and the evaluation of therapeutic effect

  19. Los Rinoceróntidos fósiles del Mioceno inferior de Buñel (Valencia

    Directory of Open Access Journals (Sweden)

    Belinchón, M.

    1984-04-01

    Full Text Available We have studied the fossil Rhinocerotidae from Buñol (Valencia, Spain. It is realized as stratigraphic synthesis of the deposit and dated as Orleanium Mammal Age (lower-middle Aragonium, which is equivalent to the 4b Neogene MammaL Unit (zonation of Mein, 1976. We conclude that the fossil association is a thanatocoenosis, with strongly rounded elements. The paleoenvironment, in which this association was accumulated, was a marsh zone in the distal part of an alluvial fan. Two species of Rhinocerotidae have been determined, one of the ,genus Acerotherium and another of the genus Dicerorhinus. The second is more abundant than the former and probably it would be adapted to a marshy habitat. We describe and figure the more representative material of both species.

    Se han estudiado los Rinoceróntidos fósiles de Buñol (Valencia. Se realiza una síntesis estratigráfica del yacimiento, estableciéndose su edad orleaniense (Aragoniense inferior-medio, equivalente a la zona 4b de la zonación de Mein (1975. Se concluye que el yacimiento corresponde a una tanatocenosis, con elementos fuertemente rodados, acumulada en una zona palustre situada en la parte distal de un abanico aluvial. Se han determinado dos especies de Rinoceróntidos: una, correspondiente al género Aceratherium, está poco representada y otra, asignable al género Dicerorhinus, es más abundante y probablemente estaba adaptada a un hábitat pantanoso. Se describe y figura el material más representativo de ambas especies.

  20. Endovascular infection following inferior vena cava (IVC) filter insertion.

    Science.gov (United States)

    Rottenstreich, Amihai; Bar-Shalom, Rachel; Bloom, Allan I; Kalish, Yosef

    2015-11-01

    Inferior vena cava filter (IVC) placement is increasing significantly. However, due to low retrieval rates, many filters are left in place indefinitely thereby exposing patients to long-term filter-related complications. This study reports a series of three patients with IVC filter infection. Cases were identified during retrospective review of medical records of all patients undergoing an IVC filter insertion at a single tertiary care university hospital between 2009 and 2013. Clinical presentation, radiological features and management are discussed. Two patients presented within days of filter placement, while the other one presented 1 year later. In two patients, fluorodeoxyglucose positron emission tomography-computed tomography (FDG PET/CT) was found to be a sensitive method to diagnose IVC filter infection. Endovascular infection of IVC filter is a rare event. In patients with IVC filter in place and fever of unknown origin or persistent bacteremia, this complication should be suspected. FDG PET/CT has a diagnostic value in this challenging diagnosis. PMID:25894477

  1. The Endovascular Management of Saccular Posterior Inferior Cerebellar Artery Aneurysms

    Energy Technology Data Exchange (ETDEWEB)

    Song, Ha Hun [Jeju Halla Hospital, Jeju (Korea, Republic of); Won, Yoo Dong; Kim, Young Joo [Uijongbu St. Mary' s Hospital, The Catholic University of Korea, Uijongbu (Korea, Republic of); Kim, Bum Soo [Kangnam St. Mary' s Hospital, The Catholic University of Korea, Seoul (Korea, Republic of)

    2008-10-15

    The purpose of this retrospective study was to report the outcome of the endovascular treatment of eight patients with eight saccular posterior inferior cerebellar artery (PICA) aneurysms. Over the last seven years (1999-2006), eight consecutive patients with saccular PICA aneurysms were treated by endovascular methods. Five of the aneurysms were presented with subarachnoid hemorrhaging, whereas three were discovered incidentally. Four of the aneurysms (3 ruptured and 1 incidental) were treated by intrasaccular coiling, whereas the remaining four (1 ruptured and 3 incidental) were treated by vertebral artery (VA) occlusion. Of the four aneurysms treated by intrasaccular coiling, three were completely packed with coils and one was partially packed. In three of four patients who underwent vertebral artery occlusions, follow-up digital subtraction angiographies demonstrated thrombosed aneurysms and PICA. No procedurerelated morbidity occurred and no re-bleed was encountered during a follow-up examination (mean; 31 months). As a result of this study, we found that the endovascular management of saccular PICA aneurysms should be considered as safe and effective

  2. A Case Report: Bilateral Posterior Inferior Cerebellar Artery Infarct

    Directory of Open Access Journals (Sweden)

    Nurten Çolak

    2004-01-01

    Full Text Available The most frequent type of cerebellar infarcts involves the posterior inferior cerebellar artery (PICA and superior cerebellar artery territories. Bilateral symettrical cerebellar infarcts are extremely rare. The etiology of this infarct pattern has not been shown clearly. It is postulated that bilateral PICA infarcts are caused by the stenosis of PICA which emerges from the left vertebral artery that supplies the blood for both cerebellar hemispheres. A 42-year old male patient came with complaints of headache, loss of balance, vertigo, nausea-vomiting and diplopia. On his neurological examination, there was nistagmus and diplopia on both horizontal gaze directions. His cerebellar tests were minimal deficient on the left side and the patient had an ataxia to the left side. His cranial MR revealed bilateral PICA infarct, and his digital substraction angipgraphy (DSA showed that his vertebral artery was stenosed from its point of origin. The etiological cause was thought to be intracranial vertebral artery occlusion with a baseline insitu atherosclerosis, in the presence of branches having their origin from one side and going to both PICA territories. The bilateral PICA infarct case,which is a rare clinical presentation, was evaluated with the help of the literature and probable pathogenesis was hypothesized.

  3. Frustrative reward omission increases aggressive behaviour of inferior fighters

    DEFF Research Database (Denmark)

    Vindas, Marco A.; Johansen, Ida B.

    2014-01-01

    Animals use aggressive behaviour to gain access to resources, and individuals adjust their behaviour relative to resource value and own resource holding potential (RHP). Normally, smaller individuals have inferior fighting abilities compared with larger conspecifics. Affective and cognitive processes can alter contest dynamics, but the interaction between such effects and that of differing RHPs has not been adjudged. We investigated effects of omission of expected reward (OER) on competing individuals with contrasting RHPs. Small and large rainbow trout (Oncorhynchus mykiss) were conditioned to associate a light with reward. Thereafter, the reward was omitted for half of the fish prior to a contest between individuals possessing a 36–40% difference in RHP. Small control individuals displayed submissive behaviour and virtually no aggression. By contrast, small OER individuals were more aggressive, and twoout of 11 became socially dominant. Increased aggression insmall OER individuals was accompanied by increased serotonin levels in the dorsomedial pallium (proposed amygdala homologue), but no changes in limbic dopamine neurochemistry were observed in OER-exposed individuals. The behavioural and physiological response to OER in fish indicates that frustration is an evolutionarily conserved affective state. Moreover, our results indicate that aggressive motivation to reward unpredictability affects low RHP individuals strongest

  4. The inferior parietal lobule: where action becomes perception.

    Science.gov (United States)

    Rizzolatti, Giacomo; Ferrari, Pier Francesco; Rozzi, Stefano; Fogassi, Leonardo

    2006-01-01

    The view defended in this article is that action and perception share the same neural substrate. To substantiate this view, the anatomical and functional organization of the inferior parietal lobule (IPL) is reviewed. In particular, it will be shown that many IPL neurons discharge selectively when the monkey executes a given motor act (e.g. grasping). Most interestingly, most of them fire only if the coded motor act is followed by a subsequent specific motor act (e.g. placing). Some of these action-constrained motor neurons have mirror properties and selectively discharge during the observation of motor acts when these are embedded in a given action (e.g. grasping for eating, but not grasping for placing). Thus, the activation of these IPL neurons allows the observer not only to recognize the observed motor act, but also to predict what will be the next motor act of the action, that is to understand the intentions of the action's agent. The finding that the same neurons that are active during the execution of specific motor acts also mediate the understanding of the 'what' and the 'why' of others' actions provides strong evidence for a common neural substrate for action and perception. PMID:16649712

  5. Primary mandibular first molar with single root and single canal: a case report of a rare morphology.

    Directory of Open Access Journals (Sweden)

    Zahra Bahrololoomi

    2014-06-01

    Full Text Available Single rooted primary mandibular first molar is a rare developmental anomaly. Literatures reveal that failure of invagination of Hertwig's epithelial root sheath leads to this unusual root form. Thorough knowledge of root canal morphology and anatomical variations of primary teeth can help a pediatric dentist in successful root canal treatment. Hereby, we describe two cases of primary mandibular first molars with an unusual morphology as a single root called pyramidal molar.

  6. Radiographic assessment of third molars development and it's relation to dental and chronological age in an Iranian population

    Science.gov (United States)

    Monirifard, Mohamad; Yaraghi, Navid; Vali, Ava; Vali, Asana; Vali, Amrita

    2015-01-01

    Background: The aim of the present study was to estimate chronological age based on third molar development and to determine the association between dental age and third molar calcification stages. Materials and Methods: In this cross-sectional study, 505 digital panoramic radiographs of 223 males (44.2%) and 282 females (55.8%) between the age of 6 and 17 were selected from patients who were treated in Departments of Pediatrics and Orthodontics of Isfahan University of Medical Sciences between the years of 2009 and 2013. Correlation between chronological age and third molar development was analyzed with SPSS 21 using Spearman's Rank correlation coefficient, Chi-square test and multiple regression statistical tests (P < 0.05). Results: All third molars demonstrated a highly significant correlation with dental age (P < 0.001). The teeth showing the highest relationship with dental age were mandibular left third molar in males and mandibular right third molar in females (rs = 0.072). When multiple regression was used to predict dental age based on molar calcification stage, the only significant correlation was between maxillary left third molar in males (P < 0.05). There was no statistically significant correlation for any of third molars in females. Relationship between chronological age and molars development stage was significant in all age subgroups and in both gender (P < 0.001). Conclusion: Strong correlation was observed between left third molars and dental age in males. Results showed that third molar calcification stage can be used as an age predictor and in general mandibular teeth seems to be more reliable for this purpose in both genders and in all ages. PMID:25709677

  7. Standard molar enthalpies of formation of 3'- and 4'-nitroacetophenones

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro da Silva, Manuel A.V., E-mail: risilva@fc.up.p [Centro de Investigacao em Quimica, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Amaral, Luisa M.P.F. [Centro de Investigacao em Quimica, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal)

    2011-06-15

    Research highlights: The standard molar enthalpies of formation, in the condensed phase, of 3'- and 4'-nitroacetophenones have been determined by combustion calorimetry. The vapor pressures of the crystalline 3'- and 4'-nitroacetophenones were measured as function of temperature by the Knudsen effusion mass loss technique. The standard molar enthalpies, entropies and Gibbs functions of sublimation, at T = 298.15 K, were calculated for both compounds. - Abstract: The standard (p{sup o} = 0.1 MPa) molar enthalpies of formation, in the condensed phase, of 3'- and 4'-nitroacetophenones, presented in this work, were obtained from measurements of their combustion energies, at T = 298.15 K, using a static bomb calorimeter. The vapor pressures of the two crystalline 3'- and 4'-nitroacetophenones were measured as a function of temperature by the Knudsen effusion mass loss technique. The standard molar enthalpies of sublimation, at T = 298.15 K, were derived from the Clausius-Clapeyron equation. The standard molar enthalpies, entropies, and Gibbs functions of sublimation, at T = 298.15 K, were calculated for the two compounds. The experimental values obtained were used to calculate the standard molar enthalpies of formation of 3'- and 4'-nitroacetophenones, in the gaseous phase, as {Delta}{sub f}H{sub m}{sup 0}(g)=-(99.4{+-}1.6)kJ{center_dot}mol{sup -1} and {Delta}{sub f}H{sub m}{sup 0}(g)=-(99.1{+-}1.7)kJ{center_dot}mol{sup -1}, respectively, and these derived values are analyzed in terms of structural enthalpic increments.

  8. The Quantitative Analysis to Inferior Oil with Electronic Nose Based on Adaptive Multilayer Stochastic Resonance

    Directory of Open Access Journals (Sweden)

    Hong Men

    2011-09-01

    Full Text Available This study makes the three acryl glycerin polymers, oxidation three acryl glycerins, and low carbon number fatty acid as inferior oil feature index. Using double steady state stochastic resonance signal-to-noise ratio analysis methods make the quantitative analysis to inferior oil. This paper analyzes the stochastic resonance. Introduces the principle detection system structure based on adaptive multilayer stochastic resonance algorithm in inferior oil quantitativeanalysis; and make adaptive double stochastic resonance model and inferior oil as example, give the simulation and numerical analysis of this model of the system. The results show that the system can obtain more accurate quality the proportion of the inferior oil information. At the same time, this method can effectively solve the semiconductor gas sensors of the baseline drift problem. The method of stochastic resonance has a lot of application prospect in improving the system performance.

  9. Apparent molar volumes, expansibilities, and isentropic compressibilities of selected electrolytes in methanol

    Energy Technology Data Exchange (ETDEWEB)

    Wawer, Jaroslaw [Department of Physical Chemistry, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk (Poland)], E-mail: jawa79@gmail.com; Krakowiak, Joanna; Grzybkowski, Waclaw [Department of Physical Chemistry, Chemical Faculty, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk (Poland)

    2008-08-15

    Densities of solutions of sodium bromide, sodium perchlorate, sodium tetraphenylborate, and tetraphenylphosphonium bromide in methanol at the temperatures ranging from 283.15 to 313.15 K have been measured. Ultrasound velocities for the above systems at T = 298.15 K have been determined. From the obtained data, the partial molar volumes and the partial molar isentropic compressibilities for electrolytes in solution have been estimated. Division into the ionic contributions has been proposed on the basis of the reference electrolyte method. The existence of the high-volume intermediate shell with an enhanced structure has been suggested.

  10. Apparent molar volumes, expansibilities, and isentropic compressibilities of selected electrolytes in methanol

    International Nuclear Information System (INIS)

    Densities of solutions of sodium bromide, sodium perchlorate, sodium tetraphenylborate, and tetraphenylphosphonium bromide in methanol at the temperatures ranging from 283.15 to 313.15 K have been measured. Ultrasound velocities for the above systems at T = 298.15 K have been determined. From the obtained data, the partial molar volumes and the partial molar isentropic compressibilities for electrolytes in solution have been estimated. Division into the ionic contributions has been proposed on the basis of the reference electrolyte method. The existence of the high-volume intermediate shell with an enhanced structure has been suggested

  11. Excess molar volumes of the binary mixtures of polyethylene glycol 300 with ethoxyethanols at various temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Kinart, Cezary M. [Department of Chemistry, University of Lodz, 90-236 Lodz, Pomorska 163 (Poland)]. E-mail: ckinart@uni.lodz.pl; Kinart, Wojciech J. [Department of Organic Chemistry, University of Lodz, 90-136 Lodz, Narutowicza 68 (Poland); Cwilinska, Aneta [Department of Chemistry, University of Lodz, 90-236 Lodz, Pomorska 163 (Poland); Klimczak, Magdalena [Department of Chemistry, University of Lodz, 90-236 Lodz, Pomorska 163 (Poland)

    2006-08-15

    Densities at T = (293.15, 298.15, 303.15, 308.15, and 313.15) K in the binary liquid mixtures of polyethylene glycol 300 with 2-ethoxyethanol, 2-(2-ethoxyethoxy)ethanol, or 2-{l_brace}2-(2-ethoxyethoxy)ethoxy{r_brace}ethanol have been measured over the entire range of mixture compositions. These data have been used to compute the excess molar volumes. The excess molar volumes are negative over the entire range of composition for all studied mixtures. The results are discussed in terms of intermolecular interactions in the bulk binary mixtures.

  12. Heminefrectomía laparoscópica en ectopia renal cruzada con fusion inferior de unidades renales / Laparoscopic heminefrectomy for crossed fused kidney with inferior ectopia

    Scientific Electronic Library Online (English)

    Octavio A., Castillo; Rafael, Sánchez-Salas; Alejandro, Foneron; Gonzalo, Vitagliano.

    2010-02-01

    Full Text Available Objetivo: La ectopia renal cruzada es una anomalía congénita infrecuente. Presentamos el caso de un niño de 3 años de edad con una ectopia renal cruzada derecha, con fusión de unidades renales y con historia previa de infecciones urinarias recurrentes y procedimientos quirúrgicos fallidos. Métodos: [...] Paciente de 3 años con diagnóstico de ectopia renal cruzada y fusión inferior de unidades renales se sometió a una heminefrectomía laparoscópica de la unidad renal inferior, producto de una hidronefrosis severa de la unidad inferior e infecciones urinarias a repetición: Resultados: Se realizo una heminefrectomía laparoscópica de la unidad renal inferior sin incidentes. El tiempo operatorio fue de 200 minutos El postoperatorio transcurrió sin incidentes. El paciente fue dado de alta a las 18 horas post cirugía. Después de un seguimiento de 5 años el paciente permanece asintomático, sin infecciones urinarias y con buena función de la unidad renal remanente. Conclusiones: El abordaje laparoscópico es una alternativa viable para el manejo de esta patología entregando todas las ventajas de la cirugía mínimamente invasiva. Abstract in english Objectives: Crossed fused renal ectopia is a rare congenital anomaly. We report the case of a 3 year old boy with diagnosis of right crossed fused renal ectopia, history of recurrent urinary tract infection and previous failure of surgical treatment. Methods: Three year old boy with diagnosis of rig [...] ht crossed fused renal ectopia of the inferior moiety underwent a laparoscopic heminephrectomy of the inferior renal unit, due to severe hidronefrosis and recurrent urinary tract infections. Results: A laparoscopic right heminephrectomy of the inferior renal moiety was performed uneventfully. Operation room time was 200 minutes and there were no perioperative complications. Patient was discharged 18 hours after the procedure. After 5 years of follow up patient remains asymptomatic with good renal function. Conclusions: The laparoscopic approach is an acceptable option to treat this anomaly, with all the advantages of minimally invasive surgery.

  13. Dinosaurios del Cretácico inferior de Galve (Teruel, España

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    Santafé, J. V.

    1987-12-01

    Full Text Available The aim of this paper is to complete the study of the Dinosaur fauna of the syncline of Galve (Teruel, Spain. Most of the outcrops are Early Barremian in age. Nevertheless, the outcrop called Las Zabacheras could be Hauterivian and El Pelejón Hauterivian-Early Barremian in age. Theropod Dinosaurs are poorly represented. Three vertebral centra are described. They are identified as Theropoda indet. The several outcrops of Galve have yielded four forms of Sauropods. Three of them (cf. Astrodon sp., Camarasauridae indet., form A, Camarasauridae indet., form B have been identified based on isolated teeth. The Sauropod from Las Zabacheras (Lapparent, 1960; Sanz, 1982 has been proposed as a new taxon, Aragosaurus ischiaticus n. gen. et n. sp. The material which the new taxon is based on are the bones studied by Lapparent (Museo de la Diputación de Teruel and new ones: caudal vertebrae, chevrones, seapula, ilium, femur and autopodial material. After a research on evolutive polarity of some traits within the Sauropoda, the apomorphic character-states which define the new taxon are as follows: First caudal vertebrae with a great transversal development of the neuroapophysis (club-like, seapular blade terminally expansioned, with an intermediate development (for example between Cetiosaurs and Brachiosaurus or Rebbachisaurus. Great dorso-ventral development (acromio-glenoideus of the anterior seapular zone (ratio miminal width of the seapular blade/maximal acromio-glenoideus height of 0.27. lliac process of ischium well developed. Pubic process of ischium with great dorso-ventral development (ratio antero-posterior length of this process/lenght of ischiadic contact with pubis, 0.63. Ischiadic process of ischium with a conspicuous final expansion. Lenght ratio humerus/femur 0.82. Lateral bulge just distal to the femoral greater trochanter. Medial condyle of femur relatively developed (ratio maximal antero-posterior diameter of medial condyle/maximal transversal distal femoral width of 0.77. The Aragosaurus taxonomic status is proposed within the family Camarasauridae (sensu Steel, 1970. The Ornithopoda described in this paper mainly belong to the family Hypsilophodontidae, except an isolated tooth identified as Ornithopoda indet. A proximal fragment of a left femur is identified as cf. Valdosaurus sp. Hypsilopbodon foxii has been identified based on a left femur and an ilium.El objetivo principal del presente trabajo ha sido completar el estudio de la fauna de dinosaurios del sinclinal de Galve, de edad mayoritariamente barremiense inferior, aunque el yacimiento de Las Zabacheras puede tener una edad Hauteriviense y el Pelejón Hauteriviense-Barremiense inferior. Los Terópodos están pobremente representados, describiéndose tres centros vertebrales que son identificados como Theropoda indet. Cuatro formas diferentes de Saurópodos han sido identificadas en los diferentes yacimientos de Galve. Tres de ellas (cf. Astrodon sp.; Camarasauridae indet., forma A; Camarasauridae indet., forma B tan sólo mediante piezas dentarias aisladas. El Saurópodo de Las Zabacheras (Lapparent, 1960; Sanz, 1982 ha sido propuesto como un nuevo taxon, Aragosaurus ischiaticus n. gen. et n. sp. Dicho material consta de diversos restos apendiculares y pélvicos estudiados por Lapparent y depositados en el Museo de la Diputación de Teruel y nuevos elementos consistentes en diversas vértebras caudales, chevrones, escápula, isquion, fémur y restos autopodiales. Las apomorfias más relevantes que definen al nuevo taxon son su relación estilopodial (longitud húmero/fémur de 0,82, el gran desarrollo relativo dorso-ventral del contorno de contacto con el pubis del proceso pubiano del isquion y la aparición de neuroapáfisis «mazudas» en las primeras vértebras caudales. El enclave taxonómico de Aragosaurus se propone dentro de la familia Camarasauridae (sensu Steel, 1970. Los Ornitópodos descritos en este trabajo perten

  14. Desviaciones torsionales de los miembros inferiores en niños y adolescentes

    Scientific Electronic Library Online (English)

    Vladimir, Calzadilla Moreira; Ibrilio, Castillo García; Julián, Blanco Estrada; Ernesto, González Martínez.

    2002-10-01

    Full Text Available El tratamiento de los defectos torsionales de los miembros inferiores durante el desarrollo posnatal continúa siendo en la actualidad objeto de controversias y desacuerdos entre los cirujanos ortopédicos. Se presenta una revisión exhaustiva a la luz de la bibliografía más reciente sobre sus diferent [...] es aspectos, tales como, la etiología, el diagnóstico, las alteraciones funcionales y los procederes terapéuticos utilizados, ya sean conservadores o quirúrgicos. Al margen de la tendencia a la corrección expontánea y lo usualmente poco incapacitantes de estos vicios de torsión, se evidencia la necesidad de un diagnóstico exacto de su localización, permitirá la aplicación de una terapéutica precoz realmente efectiva. Por su asociación con la patología torsional y los frecuentes errores diagnósticos, se describen además los elementos esenciales en el reconocimiento y tratamiento del metatarso varo congénito. Abstract in english The treatment of the torsional defects of the lower limbs during postnatal development is still at present the object of controversies and disagreements among the orthopedic surgeons. An exhaustive review to the light of the latest bibliography on its differents aspects, such as ethiology, diagnosis [...] , functional alterations and conservative or surgical therapeutic procedures used, is made. In the margin of the trend towards spontaneous correction and the rare disabilitating character of these vices of torsion, it is evidenced the need of an accurate diagnosis of its localization, which will allow the application of a really effective early therapy. Due to its association with torsional pathology and the frequent diagnostic errors, the essential elements to recognize and treat congenital metatarsus varus are described .

  15. Hemiazygos continuation of v.cava inferior: a case report

    International Nuclear Information System (INIS)

    Full text: A 78-year-old female patient was suffering from dyspnoea and tachypnoea in our hospital's orthopaedic clinic. Because she had an operation of right femoral mid-diaphizer fracture a week ago, we decided to perform a pulmonary computerized tomography angiography (CTA) examination with her clinicians in order to evaluate a possible pulmonary embolism and to make a further evaluation. In her CTA exam there were no pulmonary embolism was seen. There were some chronic changes in her lungs, bilateral pleural effusion and hilar lymphadenomagalies. A dilated and tortiozed vascular structure which was retrocrural and retroaortic placed at the level of the thorachoabdominal transition and joined to left brachiocephalic vein was seen. Then we realized that the liver was symmetrical and transverse localization the upper abdomen and the stomach and spleen was in the right upper quadrant. Because the cardiac apex was left-sided we decided that a kind of situs ambiguous. After that the patient was underwent a abdominal contrast enhanced CT which was including the both arterial and venous phases. In this examination the suprarenal part of the inferior vena cava (IVC) was interrupted and it was continuing as hemiazygos vein to the thorax something like the previous CT exam. The hepatic veins were drained into a short segment vein and then the right atrium. Multiple nodular parenchymal images which were enhanced like spleen in all phases were seen in right upper quadrant of the abdomen (polysplenia). And also partial agenesis of the pancreas and annular pancreas configuration was seen. Anomalies of the IVC occur rarely and the patient are usually asymptomatic. Non-invasive imaging modalities such as CT and MRI allow better identification of these anomalies. In these cases different organ anomalies accompanies the IVC anomalies

  16. Adjunctive Inferior Vena Cava Filter Placement for Acute Pulmonary Embolism

    International Nuclear Information System (INIS)

    Inferior vena cava (IVC) filters are sometimes placed as an adjunct to full anticoagulation in patients with significant pulmonary embolism (PE). We aimed to determine the prevalence of adjunctive IVC filter placement in individuals diagnosed with PE, as well as the effect of adjunctive filter placement on mortality in patients with right heart strain associated with PE. This was a retrospective study of patients with acute PE treated with full anticoagulation admitted to a single academic medical center. Information abstracted from patient charts included presence or absence of right heart strain and of deep-vein thrombosis, and whether or not an IVC filter was placed. The endpoint was in-hospital mortality. Over 2.75 years, we found that 248 patients were diagnosed with acute PE, with an in-hospital mortality rate of 4.4%. The prevalence of adjunctive IVC filter placement was 13.3% (33 of 248), and the prevalence of documented right heart strain was 27.0% (67 of 248). In-hospital mortality was 10.2% in the non-filter-treated group (5 of 49), whereas there were no deaths in the filter-treated group (0 of 18); however, the difference was not statistically significant (P = 0.37). Both the presence of deep-vein thrombosis and of right heart strain increased the likelihood that an adjunctive IVC filter was placed (P < 0.0001 and P < 0.001, respectively). At our institution, patients were treated with IVC filters in addition to anticoagulation in 13.3% of cases of acute PE. Prospective studies or large clinical registries should be conducted to clarify whether this practice improves outcomes.

  17. Análise comparativa entre os anestésicos locais Articaína 4% e Prilocaína 3% na extração de terceiros molares retidos em humanos - DOI: 10.4025/actascihealthsci.v26i2.1588 Comparative analysis between the local anesthesics Articaine 4% and Prilocaine 3% on human third molar removals - DOI: 10.4025/actascihealthsci.v26i2.1588

    Directory of Open Access Journals (Sweden)

    Josmar Mazucheli

    2004-04-01

    Full Text Available Os anestésicos locais são as drogas mais utilizadas na Odontologia. São utilizados com freqüência na clínica cirúrgica, sendo de grande ajuda para o cirurgião, visto que a dor tem sido descrita como uma experiência desagradável, tanto em nível sensorial quanto psicológico. O objetivo deste estudo foi adquirir mais conhecimento a respeito da articaína a 4% com adrenalina (Articaine®, além de compará-la clinicamente com a prilocaína 3% com felipressina (Prilonest®. Os anestésicos foram administrados em 21 cirurgias, nas quais, em 8, utilizou-se articaína e, em 13, prilocaína, para remoção de terceiros molares semi-retidos, superior e inferior. Como medicação pré-cirúrgica, foram administradas, uma hora antes, 4 mg de Dexametasona e, no pós-operatório, Dipirona 500 mg, 35 gotas, em caso de necessidade. Foram registrados tempo de latência, duração da cirurgia, duração de efeito do anestésico, efeitos colaterais e quantidade de analgésicos consumidos. Os dados referentes à articaína mostraram-se semelhantes aos encontrados na literatura.The local anesthesics are the most used drugs in Dentistry. They are frequently used in surgery, because pain has been described as an unpleasant experience, both on sensorial and psychological levels. The aim of this study was to obtain further knowledge about articaine 4% as well as to compare the effects of local anesthesics articaine with adrenaline 4% (Articaine® and prilocaine with felipressine 3% (Prilonest®. The anesthesics were used in 21 surgeries, 8 articaine and 13 prilocaine, to remove semi-retained eruption of upper and lower third molar. Pre-surgery medication was administrated one hour before: Dexamethasone 4 mg and 35 drops (Dipyrone 500 mg in post-surgery when needed. Onset of anesthesia, surgery duration, length of anesthesics effects and adverse reaction were observed, as well as the quantity of pain killers used. Data on articaine were similar to the ones found in literature.

  18. Spatial adjustment of the upper and lower molars during mouse prenatal development.

    Czech Academy of Sciences Publication Activity Database

    Cam, Y.; Fausser, J. L.; Peterková, Renata; Halasková, M.; Lesot, H.

    La LondelesMaures : organising comittee, 2001. s. P-80. [Seventh International Conference on Tooth Morphogenesis and Differentiation. 16.06.2001-21.06.2001, La Londe-les-Maures] Institutional research plan: CEZ:AV0Z5039906 Keywords : molar * mouse Subject RIV: EA - Cell Biology

  19. Use of HPLC for increasing the molar specific activities of tritium-labelled nucleosides

    International Nuclear Information System (INIS)

    The possibility of chromotographic separation of different isotopic forms of tritiated nucleosides has been demonstrated. Using a reversed-phase column in 3-5% solutions of ethanol in water, the labelled nucleosides eluted ahead of corresponding unlabelled analogs. Such isotope effects allow simultaneous fine purification of nucleosides and its fractionation according to molar specific activity value. (Author)

  20. Rating of sweetness by molar refractivity and ionization potential: QSAR study of sucrose and guanidine derivatives

    Scientific Electronic Library Online (English)

    Rajesh K., Singh; Mohd. A., Khan; Pashupati P., Singh.

    2014-01-01

    Full Text Available A quantitative structure activity relationship study of 31 sucrose derivatives and 30 guanidine derivatives has been undertaken. Their sweetness values, relative to sucrose (RS), have been taken from literature. The study has been made with the help of CAChe Pro software by using eight descriptors, [...] viz. electron affinity, ionization potential, electrophilicity index, total energy, heat of formation, steric energy, molar refractivity and solvent accessible surface area. Multi-linear regression (MLR) analysis has been performed with different combinations of descriptors and the quality of regression has been adjudged by the correlation coefficient, cross-validation coefficient and other statistical parameters like the standard error, standard error of the estimate, degrees of freedom, etc. The study indicates that ionization potential appears an important descriptor for sucrose derivatives, whereas molar refractivity appears an important descriptor for guanidine derivatives. The ionization potential alone and in combination with the electrophilicity index, molar refractivity and solvent accessibility surface area provide dependable QSAR models for sucrose derivatives. Molar refractivity alone and in combination with solvent accessibility surface area, ionization potential and heat of formation provide dependable QSAR models for guanidine derivatives. The predicted sweetness values obtained by these QSAR models are close to observed sweetness.

  1. Clinical treatment approach of a child with molar incisor hypomineralization (MIH combined with malocclusion.

    Directory of Open Access Journals (Sweden)

    Rossitza Kabaktchieva

    2012-04-01

    Full Text Available Introduction. Molar incisor hypomineralization (MIH was defined as "hypomineralisation of systemic origin of permanent first molars, frequently associated with affected incisors". MIH includes the presence of demarcated opacity, post eruptive enamel breakdown, atypical restoration. ?he approach to management suggested: risk identification, early diagnosis, remineralization for prevention of caries and post eruption breakdown, restorations. The clinicians very seldom notice that children with MIH usually have both- hypomineralisation and malocclusions, and they do not discuss combine treatment plan.Aim. To present our interdisciplinary approach to a patient with MIH, combined with malocclusion.Material and methods. We are presenting 9 year old child with contusio and fractura coronae dentis noncomplicata, distal occlusion, overjet, overbite and retrusion. Two consecutive stages were defined: First stage:- Professional oral hygiene and local remineralisation therapy- Vital pulp therapy of tooth 21 - Space gaining for restoration of the lost height of the molars by the means of posterior bite-plane removable appliance- Restoration of the molars with metal inlays- Lingual tipping of the lower incisorsSecond stage:- Class II correction- Growth control Results.First phase: - The tooth 21 was restored with aesthetic composite material;- Occlusion was raised with occlusal restorations (inleys and orthodontic appliance. Second phase:Medialisation of mandible and holding maxillary growth with functional appliance and occipital EOA until class one occlusal relations.Conclusion. Children with MIH should be examined and treated complex in collaboration with orthodontist and if necessary by other specialists too.

  2. Endodontic management of a mandibular second molar with radix entomolaris: a case report.

    Science.gov (United States)

    Hannah, Rosaline; Kandaswamy, Deivanayagam; Jayaprakash, Nachimuthu

    2014-05-01

    The presence of radix entomolaris (RE) in a mandibular first molar is a common occurrence in certain ethnic groups, but the presence of RE in a mandibular second molar is a rare occurrence. In the present case, RE was identified from preoperative radiographs and confirmed using cone-beam computed tomography (CBCT). The access cavity was modified to locate the RE. Cleaning and shaping were performed with nickel-titanium rotary instruments. Obturation was completed with gutta-percha cones using AH Plus (Dentsply Detrey GmbH) as sealer. From the CBCT axial images, the RE was determined to have a Type III curvature by the De Moor classification, Type B separate RE by the Carlsen and Alexandersen classification, and radiographically, a Type i image by the Wang classification. The presence of RE in the mandibular second molar makes it essential to anticipate and treat the distolingual root canal. This case report highlights the usefulness of CBCT for assessing RE in the mandibular second molar, which can help the clinician in making a confirmatory diagnosis and assessing the morphology of the root canal. PMID:24790927

  3. Evaluation of third molar development in the estimation of chronological age.

    Science.gov (United States)

    Soares, Caio Belém Rodrigues Barros; Figueiroa, José Natal; Dantas, Renata Moura Xavier; Kurita, Lúcio Mitsuo; Pontual, Andréa dos Anjos; Ramos-Perez, Flávia Maria de Moraes; Perez, Danyel Elias da Cruz; Pontual, Maria Luiza dos Anjos

    2015-09-01

    The purpose of this study was to evaluate the correlation between chronological age and the degree of third molar mineralization by Demirjian's developmental stages (Demirjian et al., 1973) using panoramic radiography. From a total of 11.396 digital panoramic radiographs of patients from three oral radiology private clinics from the northeast region of Brazil, obtained from January to June 2009, 2097 radiographic images from patients aged between 6 and 22 years were selected. The images were analyzed individually by two obsevers using a 21-inch computer screen and Windows Picture and Fax Viewer. Reliability was achieved by intra- and interobserver evaluation, using the Kappa test. Chronological age, calcification stage, gender and third molar were interrelated using a multiple linear regression model, considering age as a response variable. There was reliability with Demirjian et al.'s developmental stage assesment, displaying a significant relationship between mineralization stages and patients' age (P<0.05). There was no significant difference between the average age and the calcification stage taking gender and localization of the third molar into consideration. It is possible to estimate chronological age based on Demirjian's stage of a third molar, regardless of gender and location. PMID:26164359

  4. Eruption age of permanent mandibular first molars and central incisors in the south Indian population

    Directory of Open Access Journals (Sweden)

    Gupta Rakhi

    2007-01-01

    Full Text Available Objective: The existing eruption schedules for permanent and deciduous dentition are based on studies in the Western population. Since Indians differ from Westerners racially, genetically, and environmentally, these studies fail to provide relevant guidance on the eruption schedule in the Indian population. This study aims at determining the eruption pattern of permanent mandibular molars and central incisors in the south Indian population. Materials and Methods: 10,156 apparently healthy Indian children in the age-group of 6-9 years were examined with mouth mirror and probe under adequate illumination for the status of the eruption of the permanent mandibular first molar and permanent mandibular central incisor. Pearson?s Chi-square test with Yates? continuity correction was used to calculate the P -value for comparison of proportion between girls and boys. The values obtained in our study were compared with the standard values. The Z-test with continuity correction was used to calculate the P -value. Results: As per our study, the permanent mandibular first molars and central incisors erupted one to two years later compared to the values reported in Westerners. The earlier eruption of the permanent mandibular first molars compared to the permanent mandibular central incisors, as well as the earlier eruption of both the teeth in girls compared to boys, were in accordance with the existing literature. Conclusion: The eruption age reported by us may form a standard reference for eruption age in Indians.

  5. Selenium:mercury molar ratios in bullfrog and leopard frog tadpoles from the northeastern United States.

    Science.gov (United States)

    Burger, Joanna; Feinberg, Jeremy; Jeitner, Christian; Gochfeld, Michael; Donio, Mark; Pittfield, Taryn

    2014-06-01

    Vertebrates experience adverse effects from methylmercury, largely obtained through their food. Selenium has the potential to reduce the toxic effects of methylmercury (and vice versa). In this paper, we examine the selenium:mercury molar ratios in tadpoles (Lithobates sphenocephalus, Lithobates catesbeianus (formerly Rana), and a newly documented leopard frog species currently referred to as R. sp. nov.) and fully formed leopard frog metamorphs. There were no significant differences in metal levels between the two leopard frog species, and data were therefore combined. Selenium:mercury molar ratios varied from 19 to 38 for bullfrog tadpoles, from 16 to 330 for leopard frog tadpoles, and from 7 to 17 for leopard frog metamorphs. Leopard frog tadpoles with less than 45 days exposure to field conditions had significantly higher molar ratios than other tadpoles and leopard frog metamorphs. There were significant locational differences for the molar ratios of bullfrogs, and leopard frog tadpoles with more than 45 days of field exposure. At the sites where we were able to sample both leopard frog tadpoles and leopard frog metamorphs, there were significant differences between the two distinct life stages. Most of the variation in the ratio was accounted for by selenium levels, field sites, and exposure period. PMID:24585386

  6. Direct Pulp-Capping with Calcium Enriched Mixture in Primary Molar Teeth: A Randomized Clinical Trial

    Directory of Open Access Journals (Sweden)

    Masoud Fallahinejad Ghajari

    2010-01-01

    Full Text Available INTRODUCTION: The aim of this trial was to compare clinical and radiographic success rates of direct pulp capping (DPC using a novel biomaterial called Calcium Enriched Mixture (CEM cement versus Mineral Trioxide Aggregate (MTA in primary molar teeth. MATERIALS AND METHODS: In this randomized clinical trial 42 deciduous molars in 21 patients who had at least two teeth requiring DPC, were treated. The enrolled patients were between 5-8 years. The molar teeth were randomly divided into two experimental groups. Patients and operators were blinded. The teeth were anaesthetized, caries were removed and after pinpoint exposure of dental pulp, haemostasis was achieved. The exposure points were capped with MTA or CEM cement. All teeth were restored with amalgam. Patients were recalled for the 6-month follow up. Statistical analysis was carried out using McNemar test. RESULTS: Thirty-eight teeth were available for follow up (19 in each group. The radiographic evaluations did not show failure in experimental groups; however, in clinical examinations one sinus tract was found in CEM cement group. Clinical success rates in CEM cement and MTA groups were 94.8% and 100%, respectively. Dentinal bridge formation was not observed in the two experimental groups. CONCLUSION: There is no significant difference between treatment outcomes of direct pulp capping with either CEM cement or MTA; therefore, both biomaterials can be used successfully for DPC in primary molar teeth.

  7. Biodiesel from Canola Oil using a 1:1 Molar Mixture of Methanol and Ethanol

    Science.gov (United States)

    Canola oil was transesterified using an equimolar mixture of ethanol and methanol with potassium hydroxide (KOH) catalyst. Effect of catalyst concentration (0.5 to 1.5% wt/wt), molar ratio of equimolar mixture of ethanol and methanol (EMEM) to canola oil (3:1 to 12:1) and reaction temperature (25 t...

  8. Standard molar enthalpy of formation of 1-benzosuberone: An experimental and computational study

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, Margarida S., E-mail: msmirand@fc.up.p [Centro de Investigacao em Quimica, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Centro de Geologia da Universidade do Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Morais, Victor M.F., E-mail: vmmorais@icbas.up.p [Centro de Investigacao em Quimica, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Instituto de Ciencias Biomedicas Abel Salazar, ICBAS, Universidade do Porto, P-4099-003 Porto (Portugal); Matos, M. Agostinha R., E-mail: marmatos@fc.up.p [Centro de Investigacao em Quimica, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, Rua do Campo Alegre, 687, P-4169-007 Porto (Portugal); Liebman, Joel F., E-mail: jliebman@umbc.ed [Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, MD 21250 (United States)

    2010-09-15

    The energetics of 1-benzosuberone was studied by a combination of calorimetric techniques and computational calculations. The standard (p{sup o} = 0.1 MPa) molar enthalpy of formation of 1-benzosuberone, in the liquid phase, was derived from the massic energy of combustion, in oxygen, at T = 298.15 K, measured by static bomb combustion calorimetry. The standard molar enthalpy of vaporization, at T = 298.15 K, was measured by Calvet microcalorimetry. From these two parameters the standard (p{sup o} = 0.1 MPa) molar enthalpy of formation, in the gaseous phase, at T = 298.15 K, was derived: -(96.1 {+-} 3.4) kJ . mol{sup -1}. The G3(MP2)//B3LYP composite method and appropriate reactions were used to computationally calculate the standard molar enthalpy of formation of 1-benzosuberone, in the gaseous phase, at T = 298.15 K. The computational results are in very good agreement with the experimental value.

  9. Caveats when Analyzing Ultra-high Molar Mass Polymers by SEC

    Science.gov (United States)

    The analysis of ultra-high molar mass (M > 1 million g/mol) polymers via size-exclusion chromatography (SEC) presents a number of non-trivial challenges. Dissolution and full solvation may take days, as is the case for cellulose dissolution in non-complexing non degrading solvents; very low concent...

  10. Dental caries, restorations and extractions by dental caries in first permanent molars. Clinical and radiographic study

    International Nuclear Information System (INIS)

    This research analyse by clinical and radiographic study, dental caries, restorations and extractions in 1.600 first permanent molars, from 400 children, both sexes, aged 5 to 13 years old, assisted in the Children's Clinic, Faculdade de Odontologia de Aracatuba, UNESP, in 1994. (author)

  11. Benign Cementoblastoma associated with an unerupted third molar - A case report

    Directory of Open Access Journals (Sweden)

    Shiju Mathew Jacob

    2010-07-01

    Full Text Available Cementoblastoma is a rare odontogenic tumor derived from odontogenic ectomesenchymeof cementoblast origin that forms cementum layer on the roots of a tooth. A case report ispresented of a patient treated with surgical excision of Cementoblastoma associated with anunerupted infected right lower third molar tooth.

  12. A review of the efficacy of stainless steel crowns in the restoration of primary molars

    Directory of Open Access Journals (Sweden)

    Fatemeh Farahbakhsh Pour

    2012-01-01

    Full Text Available AbstractIntroduction: Stainless steel crown (SSC is an extremely durable restoration with several clear-cut indications for use in primary teeth, including restoration after pulpotomy/pulpectomy, restoration of teeth with developmental defects, and large carious lesions involving multiple surfaces. The aim of this review article was to assess the efficacy of SSCs for the restoration of primary molars compared to other restorative materials.Review Report: Medline and ISI Web of Science were searched for scientific papers based on the use of SSCs in order to compare the efficacy and longevity of SSCs compared to other restorative materials from 1950 to 2010. Inclusion criteria were randomized clinical trials (RCTs in English and human studies.Results: Children with extensive decay, large lesions or multiple-surface lesions in primary molars have been treated with stainless steel crowns. Because of protection from future decay provided by their full-coverage feature and their increased durability and longevity, SSCs should be particularly considered in children who are treated under general anesthesia.Conclusion: The majority of clinical trials have recommended the use of SSCs in the restoration of primary molars due to successful treatment results and their efficacy and cost-effectiveness. Key words: Deciduous tooth, Efficacy, Molar, Tooth crown.

  13. The antimicrobial action of low-molar-mass chitosan, chitosan derivates and chitooligosaccharides on bifidobacteria.

    Czech Academy of Sciences Pub