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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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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)

Toda, Maria Aparecida

2003-07-01

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Lower Third Molar Region Región del Tercer Molar Inferior  

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Full Text Available 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 necessary to systematize the description of its boundaries, planes, content, risk elements, anatomical repairs, etc.; therefore, the purpose of the present article is to review the modern concepts related to the surgical anatomy of the lower third molar region and to establish a description based on these concepts.La región del tercer molar inferior es una región importante para la práctica odontoestomatológica, en ella se presenta una gran cantidad de procesos patológicos relacionados con el desarrollo y erupción del tercer molar, por lo que se practican un gran número de intervenciones quirúrgicas. No obstante su importancia, esta región no se encuentra considerada en la terminología anatómica ni descrita en la anatomía topográfica y a pesar de la gran cantidad de estudios que analizan la anatomía quirúrgica de la región, es necesario sistematizar la descripción de sus límites, planos, contenidos, elementos de riesgo, puntos de reparo, etc., es por ello que el propósito de este artículo es revisar los conceptos modernos relacionados con la anatomía quirúrgica de la región del tercer molar inferior y proponer una descripción basada en estos conceptos.

Iván Suazo Galdames

2012-09-01

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Lower Third Molar Region Región del Tercer Molar Inferior  

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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 ...

Iván Suazo Galdames

2012-01-01

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Surgical extraction of impacted inferior third molars at risk for inferior alveolar nerve injury.  

Science.gov (United States)

The objective of the study was to prospectively assess the intraoperative findings and the radiographic signs of a study population of patients with impacted third molars at risk of inferior alveolar nerve injury. One hundred thirty-four patients with impacted mandibular third molars at risk for nerve injury were included in the study. Radiographic signs of possible close relationship between the 2 structures and intraoperative exposition or damage of the inferior alveolar nerve were recorded. The follow-up controls comprised clinical examinations and assessment for the sensation of the lower lip and chin. In 24 patients, a real contiguity was encountered between the third molars and nerve. Among these, intraoperative neural exposition was observed in 19 patients. Four patients complained of postoperative temporary hypoesthesia. No deficit of sensibility was found in cases with no exposition of the nerve. The accidental exposition of the inferior alveolar nerve is associated with an increased risk for neural injuries. At panoramic radiograph, the presence of signs of bifid and radiolucent apex, superimposition, and radiolucent root band should be considered at high risk for neural damage. PMID:21119486

Gallesio, Cesare; Berrone, Mattia; Ruga, Emanuele; Boffano, Paolo

2010-11-01

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

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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 co [...] m 40 crianças prematuras e de muito baixo 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<0,05. Resultados: A erupção do(s) primeiro(s) dente(s) ocorreu, em média, com 11,0±2,1 meses de idade cronológica e com 9,6±1,9 meses de idade corrigida para a prematuridade. Os primeiros dentes erupcionados foram os incisivos centrais inferiores. A média de erupção no sexo masculino foi de 9,7±1,9 e, no feminino, de 9,5±1,9 meses, ambas corrigidas para a prematuridade (p=0,98). A média de erupção nas crianças adequadas nutricionalmente ao nascer foi de 10,1±1,4 meses e, nas pequenas, de 9,4±2,2, também corrigidas para a prematuridade (p=0,07). Conclusões: A idade média de erupção dos primeiros dentes corrigida para a prematuridade foi de 9,6 meses. O sexo e a adequação nutricional ao nascer não alteraram a cronologia de erupção. 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<0.05. Results: The eruption of the first tooth (teeth) occurred, on average, with 11.0±2.1 months of chronological age and with 9.6±1.9 months corrected for pr

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

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Evaluation of lidocaine and mepivacaine for inferior third molar surgery  

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Full Text Available SciELO Spain | Language: English Abstract in english Objective: The aim of this study was to compare 2% lidocaine and 2% mepivacaine with 1:100,000 epinephrine for postoperative pain control. Study design: A group of 35 patients, both genders were recruited, whose had ages ranged from 13 to 27 years-old and had two inferior third molars in similar pos [...] itions to be extracted. The cartridges were distributed to the patients according to a randomised pattern, where lidocaine was in the control group and mepivacaine in the experimental group. Results: Results showed no significant association between the anesthetics and postoperative pain, pulp sensibility after one hour, gender, tooth position and duration of the surgical procedure. Conclusions: It was shown that lidocaine and mepivacaine have similar time of anesthesia, they are adequate for surgical procedures that last one hour, and there was no difference between the two anesthetics in relation to the severety of post-operative pain.

Gabriela, Granja Porto; Belmiro, Cavalcanti Do Egito Vasconcelos; Ana Cláudia, Amorim Gomes; Daniela, Albert.

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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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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.

Rodrigo Castellazzi Sella

2009-12-01

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Corticoesteroides y cirugía del tercer molar inferior: Revisión de la literatura Corticoesteroids and impacted lower third molar surgery: Literature review  

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Full Text Available El objetivo de este trabajo es buscar la evidencia disponible con respecto al uso, justificación, efectos secundarios y eficacia de corticosteroides para reducir el dolor e inflamación postoperatorios en la extracción quirúrgica de terceros molares. Queremos saber si en pacientes adultos, es la prescripción de antiinflamatorios esteroideos además de los antiinflamatorios no esteroideos (AINES, en comparación con la administración única de AINES, más efectiva para mejorar, aliviar o eliminar los síntomas de inflamación y dolor después de la extracción quirúrgica de terceros molares inferiores. En la revisión de la literatura se ha utilizando la base de datos Medline con las palabras clave "esteroides" y "terceros molares" o "Muelas del juicio" y "Cirugía". La búsqueda fue limitada también a estudios en humanos, lengua inglesa y revistas dentales.The aim of this study is searching the available evidence with respect to the use, justification, side effects and efficacy of corticosteroids in reducing pain and swelling after the surgical extraction of impacted lower third molars. We want to investigate if steroidal anti-inflammatories prescription in addition to non-steroidal anti-inflammatory drugs (NSAID, when compared with the exclusive administration of NSAID, is more effective improving, relieving or eradicating symptoms of swelling and pain after the extraction of the impacted lower third molar. We have utilize in this literature review the Medline database with the keywords "steroids" and "Third molars" or "wisdom molars" and "surgery". The search was also limited to humans, English and dental journals.

I Prieto

2005-10-01

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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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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...

2009-01-01

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Spatial Relationship between Mandibular Third Molars and Inferior Alveolar Nerve using a Volume Rendering Software  

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Full Text Available Precise localization of the third molars in relation to the inferior alveolar nerve canal is critical from a clinical point of view and strongly affects the surgical treatment outcome. Recently, by using three-dimensional modeling software, the relationship of third molar root apices and inferior alveolar nerve canal can be better understood. In this study, the spatial relationship of two surgical sites of 19 impacted third molars with close relationship to the inferior alveolar nerve canal is described by using imaging data from a cone beam computed tomography system. This study aimed to investigate the ability of three-dimensional modeling of tooth-nerve relationship using the data imported to Amira 5.2.2 imaging software

Shahrokh Nasseri

2013-12-01

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Corticoesteroides y cirugía del tercer molar inferior: Revisión de la literatura / Corticoesteroids and impacted lower third molar surgery: Literature review  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish El objetivo de este trabajo es buscar la evidencia disponible con respecto al uso, justificación, efectos secundarios y eficacia de corticosteroides para reducir el dolor e inflamación postoperatorios en la extracción quirúrgica de terceros molares. Queremos saber si en pacientes adultos, es la pres [...] cripción de antiinflamatorios esteroideos además de los antiinflamatorios no esteroideos (AINES), en comparación con la administración única de AINES, más efectiva para mejorar, aliviar o eliminar los síntomas de inflamación y dolor después de la extracción quirúrgica de terceros molares inferiores. En la revisión de la literatura se ha utilizando la base de datos Medline con las palabras clave "esteroides" y "terceros molares" o "Muelas del juicio" y "Cirugía". La búsqueda fue limitada también a estudios en humanos, lengua inglesa y revistas dentales. Abstract in english The aim of this study is searching the available evidence with respect to the use, justification, side effects and efficacy of corticosteroids in reducing pain and swelling after the surgical extraction of impacted lower third molars. We want to investigate if steroidal anti-inflammatories prescript [...] ion in addition to non-steroidal anti-inflammatory drugs (NSAID), when compared with the exclusive administration of NSAID, is more effective improving, relieving or eradicating symptoms of swelling and pain after the extraction of the impacted lower third molar. We have utilize in this literature review the Medline database with the keywords "steroids" and "Third molars" or "wisdom molars" and "surgery". The search was also limited to humans, English and dental journals.

Prieto, I; Prieto-Fenech, A; Bascones Martínez, A.

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Precisão e confiabilidade de um localizador apical na odontometria de molares inferiores: estudo in vitro  

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O coeficiente de correlação linear de Pearson revelou alta concorcândia inter–operadores e intraoperadores. Para comparação do CT1, CT2 e CT3 foi aplicado o Teste t de Student para amostras pareadas (p < 0,05, que não mostrou diferenças significativas entre todas as medidas odontométricas para os canais radiculares MV (p = 0,22 e D (p = 0,94. Portanto, o LAE testado mostrou-se preciso e confiável na determinação da odontometria de molares inferiores.

BritoJúnior, Manoel et al.

2007-01-01

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Unerupted Primary Molar Teeth Positioned Inferior to the Permanent Premolar: A Case Report  

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Primary tooth impaction is a rare finding during the development of primary dentition. Several factors contribute to the impaction of a deciduous tooth. This report describes the diagnosis and treatment of a 10-year-old boy who presented an impacted second primary mandibular molar. This tooth, located inferior to the second premolar together with an odontoma, was positioned superior to the premolar teeth. Treatment consisted of surgical removal of the impacted deciduous tooth and odontoma and...

Memarpour, M.; Rahimi, M.; Bagheri, A.; Mina, K.

2012-01-01

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Cirugía de rescate (reubicación quirúrgica) en segundos molares inferiores impactados / Rescue surgery (surgical repositioning) of impacted lower second molars  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish La impactación de los segundos molares inferiores es una complicación de la erupción dentaria muy infrecuente, dado que su incidencia se cifra de un 0,03 a un 0,21 %. Se ha detectado en mayor frecuencia de forma unilateral que bilateral y es más usual en mandíbula que en maxilar. Presenta una ligera [...] predicción por el sexo masculino, y la inclinación mesial es la más habitual. Se han publicado una amplia variedad de aproximaciones terapéuticas, fundamentalmente apelando a técnicas quirúrgicas únicas o ayudadas de técnicas ortodóncicas, con el objeto de llevar al diente a su correcta posición, y que se engloban bajo el concepto de cirugía de rescate. En los casos resueltos con una reubicación del diente impactado, la extracción profiláctica del germen se ha propugnado como obligatoria. Presentamos el caso de una paciente de 12 años y 6 meses derivado al Master de Cirugía Bucal de la Universidad de Sevilla por presentar falta de erupción del segundo molar inferior izquierdo. El paciente fue derivado por su ortodoncista, quien detecta la impactación del diente, antes de iniciar el tratamiento ortodóncico. Dicho compañero nos indica que, si es posible, no extraigamos el germen del tercer molar, pues prevé que será viable su erupción en el futuro (dispondrá de espacio en la arcada suficiente). Medidos los espacios de que disponemos, decidimos intentar la reubicación del diente impactado sin extraer el germen del cordal, que se llevó a cabo de forma exitosa. Abstract in english The impaction of lower second molars, given that its incidence is 0.03 to 0.21%, is a rare complication in tooth eruption. It has been detected more often in unilateral form than bilateral and is more common in the mandible than in the maxillary. It has a slight predilection for males, and mesial in [...] clination is more usual. A wide variety of therapeutic approaches have been published, basically referring to surgical techniques, independent or complemented by means of orthodontic technical aids, with the aim of placing the tooth in the correct position, and which are encompassed under the concept of surgical rescue. In cases resolved with repositioning of an impacted tooth, prophylactic root extraction has been proposed as obligatory. We present a case of a 12 and a half year old patient referred to the University of Seville due to non-eruption of the left lower second molar. The patient was referred by her orthodontist, who detected the impaction before starting orthodontic treatment. The orthodontist requested that, if it was possible, we did not extract the root of the third molar, because its eruption would be feasible in the future (there would be sufficient space in the arch). The spaces available were measured and we decided to attempt the repositioning of the impacted tooth without extracting the root of the wisdom tooth, which was carried out successfully.

García Calderón, Manuel; Torres Lagares, Daniel; González Martín, Maribel; Gutiérrez Pérez, José Luis.

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

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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.

José Manuel Díaz Fernández

1998-12-01

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Unerupted Primary Molar Teeth Positioned Inferior to the Permanent Premolar: A Case Report  

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Full Text Available Primary tooth impaction is a rare finding during the development of primary dentition. Several factors contribute to the impaction of a deciduous tooth. This report describes the diagnosis and treatment of a 10-year-old boy who presented an impacted second primary mandibular molar. This tooth, located inferior to the second premolar together with an odontoma, was positioned superior to the premolar teeth. Treatment consisted of surgical removal of the impacted deciduoustooth and odontoma and placement of a passive lower lingual holdingarch. Periodic examination was indicated for follow- up. Early intervention was recommended to manage orofacial disfigurement and to avoid consequent problems.

A. Bagheri

2012-01-01

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Significance of radiological variables studied on orthopantamogram to pridict post-operative inferior alveoler nerve paresthesia after third molar extraction.  

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Context: Removal of impacted third molar is a procedure that is often associated with post-operative complications. The rate of complications is somewhat high because of its proximity to the vital structures. Inferior alveolar nerve paresthesia is one of the common complications of impacted their molar surgery. This is due to intimate relationship between roots of mandibular third molar and inferior alveolar canal. To access the proximity of inferior alveolar canal to third molar many diagnostic methods are suggested but in conventional radiography orthopantamogram is considered as the best. There are many findings onorthopantamogram that are suggestive of close proximity of nerve to the canal. In this study authors reviewed seven radiographic findings related to proximity of roots to the inferior alveolar nerve as seen on orthopantamogram and try to find a relationship between these radiographic variables and presence of post-operative paresthesia. Study Design: The study containd 100 impacted third molars need to be removed. Presence of radiographic findings on orthopantamogram were noted and analyzed, to find a relationship with occurrence of post-operative inferior alveolar nerve paresthesia. Materials and Methods: This study comprises of 100 impacted third molar teeth indicated for extraction. Cases were randomly selected from the patients, needs to undergo extraction of impacted mandibular third molar. After extraction cases were evaluated for occurrence of inferior alveolar nerve paresthesia. Stastical Analyisis: Data was transferred to SPss 21 software for frequency calculation, and two tailed p-values were obtained betweens these variables and post-operative paresthesia, by applying Fischer's exact test (GRAPH PAD SOFTWARE). Results: Out of seven, four radiological findings that are grooving of roots, hooked roots, bifid roots and obliteration of white line are significantly related to post-operative paresthesia while bending of canal, narrow canal and darkening of tooth roots over the canal are not significantly associated with post-operative morbidity of facial nerve. PMID:24995248

Pathak, Sachin; Mishra, Nitin; Rastogi, Madhur Kant; Sharma, Shalini

2014-05-01

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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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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.

Aldino Puppin Filho

2011-12-01

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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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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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.

Aldino, Puppin Filho.

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

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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.

José Manuel Díaz Fernández

1996-08-01

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

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Full Text Available SciELO Spain | Language: English Abstract in spanish 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.

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

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Una rara complicación en la extracción del tercer molar inferior incluido: Caso clínico / A rare complication during the extraction of the included inferior third molar: Case report  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Presentamos una rara complicación ocurrida tras el intento de extracción del tercer molar incluido en una consulta odontológica bajo anestesia local. El paciente requirió ingreso en el servicio de urgencias para la extracción, de forma urgente, de la pieza a través de un abordaje cervical bajo anest [...] esia general e intubación nasaotraqueal por desplazamiento de la pieza hacia la fosa submandibular durante el intento de extracción ambulatoria. El paciente presentó signos evidentes de inflamación en la región submandibular con desplazamiento de la vía aérea hacia el lado opuesto. Las complicaciones derivadas de la cirugía del tercer molar son, en algunos casos, mortales y pueden aparecer tras un acto quirúrgico aparentemente de bajo riesgo. Estas complicaciones han sido ampliamente descritas en la literatura. Aún así consideramos importante el presentar complicaciones poco frecuentes en la cirugía del tercer molar ya que esto nos permitirá conocerlas y ofrecer la mejor solución en cada caso. Abstract in english We present a rare complication that appeared after an attempt to extract the included third molar with local anaesthesia at the odontologist office. The patient was admitted to the emergency room to have the tooth removed cervically under general anaesthesia and nasotracheal tubation because of its [...] movement towards the submandibular fossa during the ambulatory extraction attempt. The patient showed evident signs of swelling in submandibular region and the airway was displaced towards the opposite side. The resulting complications from the third molar surgery are, in some cases, mortal and can occur after an apparently low risk surgery. These complications have been thoroughly described in literature. Still, we consider it important to describe infrequent complications of third molar surgery because it will allow us to know more about them and offer the best solution in every case.

Aboul-Hosn Centenero, S.; Sieira Gil, R.; Monner Diéguez, A..

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Una rara complicación en la extracción del tercer molar inferior incluido: Caso clínico A rare complication during the extraction of the included inferior third molar: Case report  

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Full Text Available Presentamos una rara complicación ocurrida tras el intento de extracción del tercer molar incluido en una consulta odontológica bajo anestesia local. El paciente requirió ingreso en el servicio de urgencias para la extracción, de forma urgente, de la pieza a través de un abordaje cervical bajo anestesia general e intubación nasaotraqueal por desplazamiento de la pieza hacia la fosa submandibular durante el intento de extracción ambulatoria. El paciente presentó signos evidentes de inflamación en la región submandibular con desplazamiento de la vía aérea hacia el lado opuesto. Las complicaciones derivadas de la cirugía del tercer molar son, en algunos casos, mortales y pueden aparecer tras un acto quirúrgico aparentemente de bajo riesgo. Estas complicaciones han sido ampliamente descritas en la literatura. Aún así consideramos importante el presentar complicaciones poco frecuentes en la cirugía del tercer molar ya que esto nos permitirá conocerlas y ofrecer la mejor solución en cada caso.We present a rare complication that appeared after an attempt to extract the included third molar with local anaesthesia at the odontologist office. The patient was admitted to the emergency room to have the tooth removed cervically under general anaesthesia and nasotracheal tubation because of its movement towards the submandibular fossa during the ambulatory extraction attempt. The patient showed evident signs of swelling in submandibular region and the airway was displaced towards the opposite side. The resulting complications from the third molar surgery are, in some cases, mortal and can occur after an apparently low risk surgery. These complications have been thoroughly described in literature. Still, we consider it important to describe infrequent complications of third molar surgery because it will allow us to know more about them and offer the best solution in every case.

S. Aboul-Hosn Centenero

2009-10-01

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Bilateral fusion of mandibular second molars with supernumerary teeth: case report / Fusão bilateral dos segundos molares inferiores com dente supranumerário: relato de caso  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese A fusão é uma anomalia de desenvolvimento dental caracterizada pela união de dois dentes adjacentes. Devido a baixa freqüência desta alteração e as suas características morfológicas complexa o tratamento, quando indicado, torna-se muitas vezes difícil. Neste artigo iremos relatar um caso raro de fus [...] ão bilateral entre os segundos molares inferiores com dentes supranumerários. Abstract in english Fusion is a developmental anomaly characterized by the union of two adjacent teeth. In this article we report a rare case of bilateral fusion of permanent mandibular second molars with supernumerary teeth. The rarity with which this entity appears, along with its complex characteristics, often make [...] it difficult to treat. The endodontic management of one tooth is described, as well as the successful treatment of a periradicular lesion.

Nunes, Eduardo; Moraes, Ivaldo Gomes de; Novaes, Paulo Márcio de Oliveira; Sousa, Simone Maria Galvão de.

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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  

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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 cavo-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.

Harb, Leandro José Corrêa et al.

2010-01-01

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Influencia del hábito tabáquico en el postoperatorio de la cirugía del tercer molar inferior / Influence of smoking upon the postoperative course of lower third molar surgery  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Objetivos: Determinar si tras la cirugía del tercer molar inferior el tabaco influye en el postoperatorio (dolor y trismo) y valorar clínicamente el estado de la herida, analizando las posibles diferencias entre fumadores y no fumadores. Diseño del estudio: Los pacientes que participaron en el estud [...] io fueron distribuidos de forma aleatoria en dos grupos: Fumadores y no fumadores. Se les realizó la extracción quirúrgica de los terceros molares inferiores en la Unidad de Cirugía Bucal y Maxilofacial de la Universidad Complutense de Madrid. Las variables registradas fueron el trismo a los 7 días, la intensidad del dolor y la necesidad de medicación de rescate durante un periodo de una semana. Se analizó también el estado de la herida (coloración, presencia de placa, etc.) Resultados: Hubo dos casos de infección postoperatoria en el grupo de pacientes fumadores. El trismo postoperatorio fue mayor en los fumadores (p=0.05) Conclusiones: No hubo diferencias estadísticamente significativas en cuanto a dolor, pero sí se observó un mayor trismo en el grupo de fumadores. El tabaco no influyó en el estado de la herida ( color, inflamación de los bordes, confrontación de los mismos, ulceración, etc.). Abstract in english Objectives: To determine whether smoking influences the postoperative course (pain and trismus) of lower third molar surgery, with a clinicalevaluation of surgical wound condition and analysis of the possible differences between smokers and nonsmokers. Design: The study subjects were randomly distri [...] buted into two groups(smokers and nonsmokers) and subjected to lower third molar extraction in the Unit of Oral and Maxillofacial Surgery (Madrid Complutense University, Spain).The study variables were trismus after 7 days, the intensity of pain and theneed for rescue medication during a period of one week. The surgical wound wasalso assessed (color, presence of plaque, etc.). Results: Two cases of postoperative infection were documented among thesmokers, and postoperative trismus was found to be greater among the latter (p=0.05). Conclusions: There were no statistically significant differences between the two groups in terms of pain, though trismus was greater among the smokers. Smoking did not influence wound condition (color, marginal inflammation, appositioning of the margins, ulceration, etc.).

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

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

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Full Text Available 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 numero di denti risultava basso si sono raggruppate più popolazioni quando possibile. Sugli assi dell?analisi discriminante è interessante notare come, benché vi siano somiglianze tra popolazioni che seguono una logica geografica, altre popolazioni vicine geograficamente risultano molto distanti dal punto di vista morfologico e somigliano per contro a popolazioni differenti sia per posizione geografica che situazioni ecologiche. È noto nelle arvicole il fenomeno per il quale una determinata specie, oltre ai morfotipi dentari ad essa tipici, ne possiede altri simili se non identici a quelli di altre specie (serie di Vavilov. Lo stesso fenomeno è osservabile a livello di popolazione nello studio da noi effettuato. Interessanti anche le posizioni marginali di alcune popolazioni come Lotrago di Romagnano (VR, Zelarino (VE, Valle Millecampi (VE, Nonantola (MO, Imola-Romitorio (BO/RA, Monti della Tolfa (RM, Torre del Greco (NA, Melissano (LE, Monteparano (TA, Fontasala (TP, Roccapalumba (PA. Considerando infine nell?insieme tutte le popolazioni di savii e Terricola calabresi, dall?analisi della varianza si riscontrano differenze significative in: lunghezza relativa della parte anteriore (p<0.0001; med 51.126 sav, 50.324 cal, inclinazione rombo pitimiano (p<0.0001; med -0.018 sav, ?0.043 cal, strozzatura cappio anteriore (p<0.0001; med 25.694 sav, 29.704 cal, V6/V21 (p<0.0001; med 2.582 sav, 2.509 cal, (V10-V9/V6 (p<0.0001; med 13.915 sav, 13.040 cal, (V12-V10/V6 (p<0.0001; med 2.180 sav, 2.678 cal, (V12-V11/V6 (p 0.0080; med 15.788 sav, 15.504 cal; (V18-V17/V21*100 (p<0.0001; med ?5.149 sav, ?8.503 cal, (V19- V17/V21*100 (p 0.0043; med 2.161 sav, 2.658 cal, spessore rombo pitimiano (p<0.0001; med 0.159 sav, 0.170 cal; V26/V27 (p 0.0005; med 37.773 sav, 38.326 cal, non significative invece le differenze nella lunghezza totale (p 0.4209, (V11- V9/V6 (p 0.3558, (V20-V19/V21*100 (p 6579. Sugli assi discriminanti la separazione tra i due gruppi non è molto evidente, solo sugli assi 1 e 3 le popolazioni calabresi (eccetto Belvedere Sup. CZ hanno una posizione un po? più marginale.

Armando Nappi

2003-10-01

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Comparison of infiltration and inferior alveolar block anesthesia techniques in controlling pulpotomy pain in the primary mandibular first molars  

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Full Text Available Introduction: Pain control is of utmost importance in all dentistry fields. Anesthetic injection is perhaps the most difficult part of treatment in children. The most common anesthesia technique in the mandible is the inferior alveolar nerve block. As the block injection has a lasting anesthetic effect in children and also might cause traumatic injuries to soft tissues a different injection technique is needed. This study compared infiltration and block techniques for pain control during pulpotomy in the primary first mandibular molars.Materials and Methods: In this clinical study forty 5-8 year-old children were chosen. The subjects needed bilateral pulpotomy of primary mandibular first molars. This study was conducted based on a cross-over design. The patients were randomly divided into two groups. The patients in group A received an infiltration injection on the right side and a block injection on the left during the first and second sessions, respectively. The patients in group B received a block injection on the right side and an infiltration injection on the left during the first and second sessions, respectively. The patient pain was recorded at the moment of injection and on pulp exposure based on SEM (Sound Eye Molar scale. Data was analyzed by Mann-Whitney U and Wilcoxon signed-rank tests. Statistical significance was defined at ? = 0.05.Results: The results showed that at the moment of injection the SEM in the infiltration technique was significantly lower than that in the block technique, which demonstrates that the child can better tolerate the pain in the infiltration injection (p value < 0.001. However, the two techniques did not show significant differences in pulpal anesthesia based on the SEM scale.Conclusion: It seems the infiltration technique is superior to the block technique in controlling pain during pulpotomy in the mandibular primary first molars in 5-8 year-old children. Key words: Inferior alveolar nerve block, Infiltration anesthesia, Pulpotomy, SEM Scale, Pain control.

Adeleh Pooyafard

2011-01-01

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Clinical efficacy of computed tomography and coronectomy for prevention of postoperative inferior alveolar nerve injury occurring after impacted mandibular third molar surgery  

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Our aim was to evaluate the clinical efficacy of computed tomography and coronectomy for preventing postoperative inferior alveolar nerve injury after impacted mandibular third molar surgery. Among the patients who visited Kawasaki Medical School Hospital between January 2009 and December 2010, 12 patients with high-risk signs of inferior alveolar nerve injury on panoramic imaging were examined for the extraction of impacted mandibular third molar by computed tomography (CT). CT examinations were performed in order to examine the relationship between the root apex of impacted mandibular third molar and inferior alveolar canal for 16 teeth. Based on the imaging findings, the patients were informed about treatment methods and their consent was obtained. We compared the CT and panoramic findings and discussed the relationship between the impacted third molar and the inferior alveolar nerve. Medical records were also examined for the presence of abnormal postoperative complications. Interruption of the cortical white line of the inferior alveolar canal was identified in 13 panoramic radiographs, and bending of the inferior alveolar canal was observed in 2 panoramic radiographs. CT findings indicated type 2 inferior alveolar nerve proximity in 13 teeth, and there was no proximity in 3 teeth. The observation was selected in 10 teeth showing nerve proximity in CT findings. Traditional third molar removal was performed for the 3 teeth with no nerve proximity. Coronectomy was performed in 3 teeth with nerve proximity. The clinical course was uneventful. To prevent inferior alveolar nerve injury, coronectomy may be a better means of removing the crown of an impacted third molar while leaving the roots intact, in cases where teeth might be in proximity with the inferior alveolar nerve. (author)

2012-01-01

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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  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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.

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

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Distalização de segundo molar inferior impactado através da utilização de ancoragem esquelética com miniplaca: relato de caso Distalization of impacted mandibular second molar using miniplates for skeletal anchorage: case report  

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Full Text Available O presente estudo consiste no relato de um caso onde a distalização do segundo molar inferior impactado do lado direito foi obtida através da ancoragem esquelética com o uso de miniplaca. A verticalização dos segundos molares inferiores impactados, durante muito tempo, colocou-se como um grande desafio para ortodontistas e cirurgiões bucais devido à escassez de recursos de ancoragem destinados para esse fim. A utilização da ancoragem esquelética foi iniciada na clínica ortodôntica em meados dos anos 80 e, desde então, diversas modalidades têm sido desenvolvidas para esse princípio, como a utilização de mini-implantes, implantes dentários e, finalmente, miniplacas, que foram testadas e apresentaram resultados animadores. O assunto é relevante para ortodontistas e cirurgiões bucais, uma vez que o uso das miniplacas pode influir de forma significativa no tratamento de molares inferiores impactados.This study describes a case with an impacted right mandibular second molar which was distalized using miniplates for skeletal anchorage. Uprighting impacted mandibular second molars has been a great challenge for orthodontists and oral surgeons because of the scarcity of anchorage options. Skeletal anchorage was first used in clinical orthodontics in the middle of the 1980s. Since then, several devices have been developed for that purpose, such as mini-screws, tooth implants and, lately, miniplates, which have been tested and showed encouraging results. This topic is relevant for orthodontists and oral surgeons because the use of miniplates may significantly change the treatment of impacted mandibular molars.

Belini Freire-Maia

2011-08-01

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Estudo comparativo em radiografias panorâmicas do grau de inclinação dos terceiros molares inferiores segundo os traçados de Altonen, Haavikko & Mattila, e de Puricelli  

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Full Text Available A presente pesquisa teve por objetivo realizar uma avaliação comparativa entre os resultados das medidas obtidas segundo dois traçados (Altonen, Haavikko e Mattila × Puricelli, efetuados sobre radiografias panorâmicas em dois momentos de formação radicular, verificando-se a presença ou ausência de compatibilidade entre os mesmos quanto ao grau de inclinação dos terceiros molares inferiores em relação aos segundos molares. Desta forma, as seguintes medidas foram comparadas: ângulo ? de Altonen, Haavikko e Mattila correspondente ao ? de Puricelli, o qual indicou o relacionamento dos terceiros molares inferiores em relação aos segundos molares. Baseando-se nos resultados obtidos, apresentados e discutidos no presente trabalho e de acordo com a metodologia estudada, pode-se concluir que os traçados diferem entre si. Entretanto, apresentam uma correlação positiva.

Hennigen, Tatiana Wahl et al.

2007-01-01

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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  

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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 trial 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 Barce...

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

2007-01-01

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The effects of informed consent format on preoperative anxiety in patients undergoing inferior third molar surgery.  

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Objective: To evaluate the effect of informed consent format on preoperative anxiety of patients. Material and Methods: We performed a prospective study (91 patients) undergoing lower third molar extraction. Patients were distributed into three groups. Informed consent for surgery was obtained through a written document, an oral interview or a video recording. Afterwards, patients were asked about their anxiety level and the effect the informed consent had had on it. Results: Whereas the information conveyed both in oral and written formats relieved the patient to some extent (in a scale of -3 to +3) 0.97±1.21 and 0.29±0.97, respectively), the video recording increased patient's anxiety in a statistically significant way (in a scale of -3 to +3, -0.57±1.43). The difference obtained between the values obtained in oral and written information was not statistically significant. Discussion: The most adequate format, according to our study, would be the oral format. PMID:24316709

Torres-Lagares, D; Heras-Meseguer, M; Azcárate-Velázquez, F; Hita-Iglesias, P; Ruiz-de-León-Hernández, G; Hernández-Pacheco, E; Gutiérrez-Pérez, J-L

2014-01-01

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Distalização de segundo molar inferior impactado através da utilização de ancoragem esquelética com miniplaca: relato de caso / Distalization of impacted mandibular second molar using miniplates for skeletal anchorage: case report  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese O presente estudo consiste no relato de um caso onde a distalização do segundo molar inferior impactado do lado direito foi obtida através da ancoragem esquelética com o uso de miniplaca. A verticalização dos segundos molares inferiores impactados, durante muito tempo, colocou-se como um grande desa [...] fio para ortodontistas e cirurgiões bucais devido à escassez de recursos de ancoragem destinados para esse fim. A utilização da ancoragem esquelética foi iniciada na clínica ortodôntica em meados dos anos 80 e, desde então, diversas modalidades têm sido desenvolvidas para esse princípio, como a utilização de mini-implantes, implantes dentários e, finalmente, miniplacas, que foram testadas e apresentaram resultados animadores. O assunto é relevante para ortodontistas e cirurgiões bucais, uma vez que o uso das miniplacas pode influir de forma significativa no tratamento de molares inferiores impactados. Abstract in english This study describes a case with an impacted right mandibular second molar which was distalized using miniplates for skeletal anchorage. Uprighting impacted mandibular second molars has been a great challenge for orthodontists and oral surgeons because of the scarcity of anchorage options. Skeletal [...] anchorage was first used in clinical orthodontics in the middle of the 1980s. Since then, several devices have been developed for that purpose, such as mini-screws, tooth implants and, lately, miniplates, which have been tested and showed encouraging results. This topic is relevant for orthodontists and oral surgeons because the use of miniplates may significantly change the treatment of impacted mandibular molars.

Freire-Maia, Belini; Pereira, Tarcísio Junqueira; Ribeiro, Marina Parreira.

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Surgical extraction of lower third molars: diagnostic tests and operative technique in the prevention of inferior alveolar nerve injury. Case study  

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Increased knowledge and technical refinement have broadened the limits of outpatient oral surgery; however, these changes have at the same time led to a greater number of complications and poor outcomes and, accordingly, to legal action for professional responsibility. Oral surgery represents 10% of all actions, and almost all of these are attributable to exodontic surgery, of which around a third are related to inferior alveolar nerve injury following the extraction of lower third molars.

Meleo, D.; Pacifici, L.

2008-01-01

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Piezoelectric bone surgery in the treatment of an osteoma associated with an impacted inferior third molar: a case report.  

Science.gov (United States)

Operative removal of impacted mandibular third molars is a common and not riskless surgical procedure. We present an emblematic case of an osteoma closely associated with an impacted third left mandibular molar treated by Mectron Piezosurgery medical ultrasonic device. PMID:25002883

D'Amato, Salvatore; Sgaramella, Nicola; Vanore, Laura; Piombino, Pasquale; Orabona, Giovanni Dell'Aversana; Santagata, Mario

2014-01-01

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

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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.

G. Laissle Casas del Valle

2009-06-01

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

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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 p...

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

2011-01-01

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Desplazamiento accidental hacia el espacio parafaríngeo de un fragmento de un tercer molar inferior retenido Accidental displacement of a fragment of a retained lower third molar towards the parapharyngeal space  

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Full Text Available La extracción quirúrgica de los terceros molares retenidos es la operación realizada con más frecuencia por los cirujanos maxilofaciales, incluso de forma profiláctica, y se asocia con complicaciones trans y posoperatorias. Se presenta un caso con desplazamiento de un fragmento del tercer molar inferior izquierdo durante su exéresis quirúrgica hacia el espacio parafaríngeo, que resulta raro tanto por su frecuencia como por el tratamiento utilizado en esta complicación, pues se han reportado muy pocos casos en la literatura internacional y ninguno en nuestro país.The surgical removal of the retained third molars is the most common surgery performed by maxillofacial surgeons, even in a prophylactic way, and it is associated with trans- and postoperative complications. A case with displacement of a fragment of the left lower third molar towards the parapharyngeal space during its surgical exeresis is presented. It is a rare case due to its frequency and to the treatment used in this complication, since a few cases have been reported in international literature and none in our country.

Yudit Algozaín Acosta

2008-03-01

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish 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. Abstract in english 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 imp [...] ortant 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.

Laissle Casas del Valle, G.; Aparicio Molares, P.; Uribe Fenner, F.; Alcocer Carvajal, D..

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Danger zone in mandibular molars before instrumentation: an in vitro study Zona de risco em molares inferiores previamente a instrumentação: estudo "in vitro"  

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The aim of this work was to measure the danger zone in mandibular molars, relating to strip perforations that might affect the mesial root during canal instrumentation. One hundred mesial roots were sectioned 2mm below the furcation and the distal concavities were measured with a microscope from the border of the canals to the outer dentin of the root. The average thickness of the danger zone of the mesial roots was 0.789 +/- 0.182mm. No significant statistical differences were observed compa...

Paulo Ferreira Garcia Filho; Ariadne Letra; Renato Menezes; Antônio Márcio Rezende do Carmo

2003-01-01

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Variables preoperatorias e intraoperatorias asociadas al aumento del tiempo quirúrgico en la exodoncia de terceros molares inferiores / Pre-surgical and surgical factors related to increase of surgical time in lower third molar remove  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish Introducción: La exodoncia de tercer molar es un procedimiento frecuente en odontología, lo que exige conocer los factores que pueden anticipar el tiempo quirúrgico y sus características. El objetivo de esta investigación es conocer los factores asociados al aumento del tiempo quirúrgico (ATQ) en la [...] exodoncia de terceros molares inferiores (3M). Material y método: 145 sujetos de entre 15 y 40 años fueron seleccionados desde tres centros quirúrgicos de Temuco (Chile), en los que fueron realizados 158 cirugías; todos los pacientes consultaron por exodoncia de tercer molar siendo operados en tales centros. Las variables del paciente, del diente y de la cirugía fueron estudiadas; la información fue analizada con el paquete estadístico Stata 9.1, empleando en test de Fisher y chi cuadrado con p Abstract in english Introduction: Everyday, the third molar's surgery is more frequent. That fact makes necessary to know the factors that allow to anticipate the surgical time and its characteristics. The aim of this research was to know the pre-surgical and surgical factors associated with the increase of the surgica [...] l time (IST) of the mandibular third molar (3M)'s surgery. Methodology: 145 subjects between the 15-40 years-oldwere selected from three surgical centers of Temuco (Chile). In this enclousures 158 surgeries were realized. All of the patients consulted by a 3M' s surgery, being put under surgical extraction in this centers. Variables from the patients, tooth and surgery itself were studied. The information were analyzed in the Stata 9.1 statistical package, utilizing the Fisher Test and Chi-Square Test,with p

S., Olate; J.P., Alister; R., Alveal; M., Soto; H.D., de Miranda Chaves Netto; D., Thomas.

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

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Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

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

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

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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.

Tarley Eloy Pessoa de Barros

2011-03-01

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

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Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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.

Luis, Hernández Pedroso.

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High-resolution dental magnetic resonance imaging of inferior alveolar nerve responses to the extraction of third molars  

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The objective of this study was to assess whether signal changes can be detected in the neurovascular bundle of the mandibular canal after the extraction of a third molar. We retrospectively analyzed MRI scans of 30 test subjects with healthy mandibles and 41 patients who had had a wisdom tooth extracted. Signal intensities were measured at particular sites in the neurovascular bundle, which were defined as regions of interest (ROI) in the sagittal T1-weighted images before and after intravenous administration of a paramagnetic contrast agent. On the basis of the signal intensity increases that were measured after contrast agent administration, we compared the signal increases obtained for the patients who had received surgical treatment with the results obtained for the population of test subjects with unremarkable mandibles (t-test, P<0.05). Compared with the healthy test subjects, patients who had received surgical treatment showed significantly higher signal intensity increases at two measurement sites, i.e., the second molar and the second premolar (P<0.05). We found no significant differences when the measurements were performed at the first molar (P=0.06), the third molar (P=0.47) and in the area of the ascending mandibular ramus (P=0.79). Compared with a population of healthy test subjects, patients who had their third molars surgically removed show higher signal intensity increases in the neurovascular bundle after intravenous contrast agent administration. The underlying cause may be the higher blood flow in the arteries and veins and the perineural plexus, which may give evidence of the pathophysiological mechanism of nerve damage in the narrow canal as a result of osteotomy. (orig.)

Kress, B.; Stippich, C.; Sartor, K. [Department of Neurology, Division of Neuroradiology, University of Heidelberg, Medical Center, 69120, Heidelberg (Germany); Gottschalk, A.; Baehren, W. [Department of Radiology, Armed Forces Hospital, Ulm (Germany); Anders, L.; Palm, F. [Department of Dental, Oral and Maxillofacial Surgery, Armed Forces Hospital, Ulm (Germany)

2004-08-01

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

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Full Text Available SciELO Brazil | Language: English Abstract in english 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.

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

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

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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.

Fábio Wildson Gurgel Costa

2013-03-01

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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  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish 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.

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

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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)

Full Text Available SciELO Spain | Language: English Abstract in spanish 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

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

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Plasma variations in stress markers: clinical trial of two anesthetics used in regional block in the extraction of impacted inferior third molars.  

Science.gov (United States)

Objectives: Was to evaluate the effect of different regional anesthetics (articaine with epinephrine versus prilocaine with felypressin) on stress in the extraction of impacted lower third molars in healthy subjects. Sutdy Desing: A prospective single-blind, split-mouth cross-over randomized study was designed, with a control group. The experimental group consisted of 24 otherwise healthy male volunteers, with two impacted lower third molars which were surgically extracted after inferior alveolar nerve block (regional anesthesia), with a fortnight's interval: the right using 4% articaine with 1:100.000 epinephrine, and the left 3% prilocaine with 1:1.850.000 felypressin. Patients were randomized for the first surgical procedure. To analyze the variation in four stress markers, homovanillic acid, 3-methoxy-4-hydroxyphenylglycol, prolactin and cortisol, 10-mL blood samples were obtained at t = 0, 5, 60, and 120 minutes. The control group consisted of 12 healthy volunteers, who did not undergo either extractions or anesthetic procedures but from whom blood samples were collected and analyzed in the same way. Results: Plasma cortisol increased in the experimental group (multiple range test, P<0.05), the levels being significantly higher in the group receiving 3% prilocaine with 1:1.850,000 felypressin (signed rank test, p<0.0007). There was a significant reduction in homovanillic acid over time in both groups (multiple range test, P<0.05). No significant differences were observed in homovanillic acid, 3-methoxy-4-hydroxyphenylglycol or prolactin concentrations between the experimental and control groups. Conclusions: The effect of regional anesthesia on stress is lower when 4% articaine with 1:100,000 epinephrine is used in this surgical procedure. PMID:24316704

Arteagoitia, I; Zumarraga, M; Dávila, R; Barbier, L; Santamaría, G; Santamaria, J

2014-01-01

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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)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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 d [...] iferentes técnicas - técnica convencional 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.

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

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Desplazamiento accidental hacia el espacio parafaríngeo de un fragmento de un tercer molar inferior retenido / Accidental displacement of a fragment of a retained lower third molar towards the parapharyngeal space  

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Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish La extracción quirúrgica de los terceros molares retenidos es la operación realizada con más frecuencia por los cirujanos maxilofaciales, incluso de forma profiláctica, y se asocia con complicaciones trans y posoperatorias. Se presenta un caso con desplazamiento de un fragmento del tercer molar infe [...] rior izquierdo durante su exéresis quirúrgica hacia el espacio parafaríngeo, que resulta raro tanto por su frecuencia como por el tratamiento utilizado en esta complicación, pues se han reportado muy pocos casos en la literatura internacional y ninguno en nuestro país. Abstract in english The surgical removal of the retained third molars is the most common surgery performed by maxillofacial surgeons, even in a prophylactic way, and it is associated with trans- and postoperative complications. A case with displacement of a fragment of the left lower third molar towards the parapharyng [...] eal space during its surgical exeresis is presented. It is a rare case due to its frequency and to the treatment used in this complication, since a few cases have been reported in international literature and none in our country.

Algozaín Acosta, Yudit; Viñas García, Mileydis.

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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)

Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

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

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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  

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Full Text Available 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 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.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 radiografiados. 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.

J Prabhakar

2013-03-01

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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  

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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 al...

Carla Renata Sipert; Renata Pardini Hussne; Celso Kenji Nishiyama

2006-01-01

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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  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish 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

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

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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)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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.

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

60

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  

Directory of Open Access Journals (Sweden)

Full Text Available 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.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 selecionados 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.

Carla Renata Sipert

2006-01-01

 
 
 
 
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Fusión de un tercer molar mandibular con un cuarto molar supernumerario Fusion of mandibular third molar with supernumerary fourth molar  

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Full Text Available La fusión dental es la unión de dos gérmenes dentales normalmente separados, mientras que la geminación se define como el intento de división de un único germen dental. La fusión y geminación de molares es poco frecuente en la dentición permanente. Describimos un caso clínico de un tercer molar inferior derecho fusionado a un cuarto molar supernumerario en un paciente varón de 36 años que ha presentado repetidos episodios de pericoronaritis. Tras el estudio radiológico se realiza la exodoncia del cordal semiincluido bajo anestesia local. Llevamos a cabo una revisión bibliográfica al respecto.Dental fusion is the union of two tooth buds that normally are separated, while gemination is defined as an attempt by a single tooth bud to divide. The fusion and gemination of molars is uncommon in permanent teeth. We report a clinical case of a right lower third molar fused to a supernumerary fourth molar in a 36-year-old male patient with repeated episodes of inflammation. After the radiologic study, the semi-impacted third molar was extracted under local anesthesia. The literature was reviewed.

C. López Carriches

2008-10-01

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Four impacted fourth molars in a young patient: a case report.  

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The occurrence of supernumerary teeth is a relatively uncommon dental anomaly and it's rare for patients to have impacted fourth molars in all quadrant. Aim of this work is to describe the presence of bilateral fourth molars in the maxilla and the mandible in a young male patient aged 22 years came to our hospital with acute pericoronal infection around unerupted third inferior molars. Routine radiographic examination revealed impacted inferior third molars but also unerupted bilateral upper and inferior fourth molars. The acute infection was treated by local measures and the patient was subsequently admitted for removal of third and fourth impacted upper and lower molars under general anesthesia. PMID:23741604

Clementini, M; Ottria, L; Pandolfi, C; Agrestini, C; Barlattani, A

2012-10-01

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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  

Digital Repository Infrastructure Vision for European Research (DRIVER)

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 ...

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

2013-01-01

64

Prevalência de lesão dos nervos alveolar inferior, bucal e lingual em procedimentos operatórios  

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Full Text Available Os nervos alveolar inferior, lingual e bucal em seu trajeto estão próximos à região cirúrgica dos dentes terceiros molares inferiores. A literatura apresenta trabalhos que relatam a prevalência de lesão nos nervos alveolar inferior e lingual neste tipo de procedimento, porém não relata sobre a lesão no nervo bucal. Não existe consenso quanto a percentagem de lesão nervosa, tendo incidência variável entre vários trabalhos. Assim, nos propusemos a estudar as relações anatômicas destes três nervos com o dente terceiro molar inferior e a coletar dados clínicos da incidência de lesão. A relação do nervo alveolar inferior como terceiro molar inferior foi analisada através de radiografias periapicais. A relação dos nervos lingual e bucal com o dente foi analisada através de peças cadavéricas. Os dados clínicos foram levantados através de questionário distribuído a cirurgiões dentistas. Os resultados obtidos foram: com relação ao nervo alveolar inferior, 40% das radiografias mostraram proximidade entre o terceiro molar inferior e o canal mandibular; com relação ao nervo lingual, obtivemos uma distância média de 21 mm com relação ao rebordo alveolar dos terceiros molares inferiores; o nervo bucal apresentou uma distância média de 11 mm da porção distal do terceiro molar inferior, superiormente a linha oblíqua da mandíbula; com relação aos dados clínicos, os profissionais participantes da pesquisa relataram uma incidência de 6% na lesão do nervo alveolar inferior e 3,5% na lesão do nervo lingual, com 0% na lesão do nervo bucal, durante a extração de terceiros molares inferiores.

Giuliano João Damiani

2007-01-01

65

Cuartos molares supernumerarios: relato de caso clínico  

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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.

Daniela Nascimento Silva

2006-04-01

66

Cuartos molares supernumerarios: relato de caso clínico  

Scientific Electronic Library Online (English)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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.

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

67

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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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)

Atihe, Mauricio Martins

2002-07-01

68

Identificación botánica y producción de frutos en un bosque deciduo del asentamiento Las Peñitas, al sur del estado Aragua, Venezuela  

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Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish Se colectaron muestras vegetales con el objeto de identificar botánicamente las especies leñosas presentes en un bosque deciduo, así como su frecuencia, densidad y el grado de diversidad dentro del bosque. El bosque en estudio se dividió en cuatro áreas diferentes: bosque no intervenido, bosque no i [...] ntervenido recientemente, bosque parcialmente intervenido recientemente y bosque totalmente intervenido recientemente y en cada una se establecieron 3 transectas de 100 m x 5 m. La frecuencia y densidad se determinaron por el número de individuos de cada especie presentes en cada transecta y el grado de diversidad se estimó mediante los índices de Simpson y de Shannon. Se encontraron 32 especies botánicas diferentes, predominando la familia Leguminoseae con un 37% de participación y otras 14 familias que representaron el otro 63%. Se evidenciaron diferencias en la cantidad y la frecuencia de las especies entre cada una de las áreas fisonómicas, así como diferencias entre especies en la misma área. El área con mayor densidad de especies fue el bosque no intervenido (2.780 plantas/ha). El grado de diversidad evaluado por los índices de Simpson y de Shannon resultó mayor (P Abstract in english Herbarium specimen were collected in order to identify the woody species present in a deciduous forest, as well as their frequency, density and the degree of diversity of the forest. The studied forest was divided in four different areas: no intervened forest, forest no recently intervened, forest p [...] artially intervened recently, and forest completely intervened recently, and in each area 3 experimental plots of 100 m x 5 m were set along topography gradients. The frequency and density were determined by the number of individuals of each species in the plot, and the degree of diversity was assumed by the Simpson and Shannon’s indexes. There were 32 different botanical species, predominating the Leguminoseae family with 37% and 14 other families that represented 63%. Differences were found in the quantity and frequency of the species among the physiognomic areas, as well as differences among species in the same area. The area with higher species density was the no intervened forest (2780 plants/ha). The degree of diversity evaluated by the Simpson and Shannon´s indexes was higher (P

José, Valero; Miguel, Benezra; Selina, Camacaro; Luís, Chong; Orlando, Guenni.

69

Molar incisor hypomineralization.  

Science.gov (United States)

Molar Incisor Hypomineralization (MIH) is a common condition in New Zealand children and children around the world and can result in a significant defect in first permanent molars. This condition inevitably leads to a large amount of dental treatment for young children and may even result in the removal of their first permanent molars. This lecture will outline the understanding of the physical properties of these teeth and provide an evidence based review of the treatment options for affected teeth. PMID:24783826

Mahoney, Erin

2012-04-01

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Relationship between lower third molar and mandibular canal  

International Nuclear Information System (INIS)

The mandibular canal is often closely related to the lower third molars. During the surgical removal of the third molar, the inferior alveolar nerve in the canal is sometimes damaged leading to impaired sensation in the lower lip. This is one of the most unpleasant postoperative complications. The buccolingual relationship between the lower third molar and the mandibular canal cannot be diagnosed by ortho-pantomography although preoperative evaluation must be carried out radiologically. In present study, the relationship was determined by using CT scan. Forty-seven lower third molars of 35 patients were evaluated preoperatively by CT scan. The mandibular canal of all cases overlapped with the third molar on ortho-pantomography. CT scan was taken in two ways. The first was the Tragion-Menton plane which was nearly parallel to the canal at the apex of the third molar. The second was the plane of the axis of the third molar. Axial CT scan was taken when the third molar erupted horizontally, and coronal CT scan was done when the molar erupted vertically. CT scan examination exactly revealed the position of the mandibular canal in relation to the root of the third molar. The canal was located buccally to the roots in 55 percent of cases, apicobuccally in 6 percent, apically in 23 percent, apicolingually in 6 percent, lingually in 2 percent, and between roots in 6 percent. The results of the present study were consistent with previous reports. In 12 cases, the inferior alveolar neurovascular bundle was visible during operation. It was visible in only 2 of 22 cases when the canal was located buccally. It was visible, on the other hand, in all cases in which the canal was located apicolingually, lingually, and between roots. It also tended to be visible when the canal overlapped more strongly with the third molar on preoperative ortho-pantomography. (author)

1994-01-01

71

["Molar-incisor hypomineralization"].  

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Hypocalcification of the enamel is the most common developmental disorder observed in teeth. The prevalence of this kind of hypomineralisation is about 10-19%. These molars are often referred to as cheese molars, because the lesions clinically resemble cheese in color and consistency. Other descriptions are: idiopathic enamel hypomineralisation in the permanent first molars, idiopathic enamel opacities in the permanent first molars, non fluoride enamel hypomineralisation in the permanent first molars, non-endemic mottling of enamel in the permanent first molars. Molar-Incisor Hypomineralisation is today the proposed expression for this disease. Occlusal surfaces of the first permanent molar are most commonly affected. The lesions are more frequent in the upper jaw than in the lower jaw. The incisors are affected to a lesser degree than the molars. Several aetiological factors can cause these defects. Some studies show a relation between intake of dioxins via mother's milk after prolonged breast feeding and developmental defects of the child's teeth. Because the ameloblasts are very sensitive to oxygen supply, complications involving oxygen shortages during birth or respiratory diseases such as asthma or bronchitis and pneumonia are discussed as further aetiological factors. Renal insufficiency, hypoparothyroidism, diarrhoea, malabsorption and malnutrition and high-fever diseases can be other reasons for the occurrence of these defects. Defective enamel can be a locus of lowered resistance for caries. Histologically there are areas of porosity of varying degrees. The affected teeth can be very sensitive to air, cold, warm and mechanical stimuli. Toothbrushing may create toothache in these teeth. We therefore suggest that these patients receive intensified prevention with fluoride varnish, a fissure sealing, GIZ, composits, stainless steel crowns or implants. In some cases an interdisciplinary approach with an orthodontist can result in the extraction of the molars in the age of 8 to 10 years. PMID:15106501

Kellerhoff, Nadja-Marina; Lussi, Adrian

2004-01-01

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

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Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

Umit, Karacayli; Nuket, Gocmen-Mas.

73

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

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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.

Umit Karacayli

2009-03-01

74

Nerve damage and third molar removal.  

Science.gov (United States)

The surgical removal of lower third molars endangers both the lingual and inferior alveolar nerves. Patients sustaining an injury to either of these nerves must be managed correctly, and this requires a diagnosis of the injury type and regular monitoring of the recovery of sensation. Surgical intervention for a damaged inferior alveolar nerve is not usually indicated but may be undertaken: if the nerve is completely divided and the severed ends are misaligned; if a bony fragment has compressed the mandibular canal; or if the patient suffers from persistent neuropathic pain. In contrast, after injury to the lingual nerve, if sensory testing demonstrates no neural recovery within 3-4 months, exploration of the injury site and microsurgical repair of the damaged nerve is indicated. PMID:14558203

Loescher, A R; Smith, K G; Robinson, P P

2003-09-01

75

Mandibular alveolar neurovascular bundle injury associated with impacted third molar surgery  

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Inferior alveolar neurovascular bundle (IANB) injury is one of the most common complications of third molar removal and involves important medicolegal issues. An accurate preoperative radiographic assessment of surgical difficulty is necessary to correctly plan the removal of impacted third molars and to estimate the risk of IANB injury. Therefore, the preoperative knowledge of the exact location of the third molar roots in relation to the mandibular canal is mandatory. A direct contact betwe...

Gallesio, Cesare

2010-01-01

76

Cornual molar ectopic pregnancy  

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Full Text Available The aim of this study is to present a rarely seen cornual molar ectopic pregnancy case regarding with literature. 36 years old patient with the third pregnancy was referred to our clinic with the prediagnosis of viable ectopic pregnancy. The patient had two vaginal delivery history and she had vaginal bleeding as spotting onwards fifteen days. Ultrasonographic assessment demonstrated ectopic pregnancy with positive fetal cardiac activity and 8mm crown-rump length (6W5D at right cornual region. The patient was performed cornotomy with laparotomy. Postoperative pathological evaluation was reported as a partial molar pregnancy. ?-human chorionic gonadotropin (?-hCG values declined dramatically and so additional treatment was not applied. Molar ectopic pregnancy findings are usually seen as conventional pregnancies and ?-hCG values and histopathological evaluation is important for correct diagnosis and follow up. [Int J Reprod Contracept Obstet Gynecol 2013; 2(4.000: 740-742

Bulent Cakmak

2013-08-01

77

[Nerve injury during mandibular third molar surgery. The importance of preoperative diagnosis and surgical skill].  

Science.gov (United States)

A 26-year-old woman was referred by a dentist to an oral and maxillofacial surgeon after an unsuccessful attempt to remove a mandibular third molar. A panoramic radiograph showed the remaining root of the third molar and the patient suffered from insensitivity of the lower lip. The root of the third molar was removed surgically. The sensitivity of the lip recovered completely within three months. Injury of the inferior alveolar nerve and the lingual nerve is a serious complication after mandibular third molar removal. The inferior alveolar nerve is at risk for injury if the third molar root is intimately connected with the mandibular canal. Refraining from preoperative clinical and radiographic diagnostics is malpraxis. Surgical skill is a prerequisite to reduce the risk of nerve injury. PMID:15224444

Zecha, P J; Stegenga, B

2004-06-01

78

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.

2009-09-01

79

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)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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

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

80

Taurodontism in deciduous molars.  

Science.gov (United States)

Taurodont teeth are characterised by large pulp chambers at the expense of roots. An enlarged pulp chamber, apical displacement of the pulpal floor and no constriction at the level of the cement-enamel junction are the characteristic features of taurodont tooth. It appears more frequently as an isolated anomaly but its association with syndromes and other abnormalities have also been reported. Permanent dentition is more commonly affected than deciduous dentition. This paper presents a case report of taurodontism in relation to mandibular deciduous second molars. PMID:23737594

Bafna, Yash; Kambalimath, H V; Khandelwal, Vishal; Nayak, Prathibha

2013-01-01

 
 
 
 
81

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

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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.

Samer Abdel Nour Khoury

2008-12-01

82

Consideraciones anatómicas del conducto alveolar inferior / Anatomical considerations of the inferior alveolar canal  

Scientific Electronic Library Online (English)

Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish INTRODUCCIÓN: el conocimiento de variantes anatómicas del conducto alveolar inferior es necesario para la realización de procedimientos que involucren la mandíbula. El objetivo fue determinar las relaciones y variaciones anatómicas del conducto alveolar inferior MÉTODOS: se hizo un estudio descripti [...] vo, en 50 hemimandíbulas humanas secas, midiendo distancias del foramen mandibular con respecto a los bordes anterior, posterior, inferior y escotadura sigmoidea, las distancias del agujero mentoniano al borde basal y la cresta alveolar. Se hicieron cortes en la rama y el cuerpo, para determinar las relaciones con estructuras anatómicas próximas. RESULTADOS: el foramen mandibular fue encontrado en el 88% en el tercio medio de rama. La distancia del foramen a la escotadura fue 19,78 ± 3,3 mm, al borde anterior 17,46 ± 3,04, al borde posterior 12,2 ± 1,9 y al borde basal 26,4 ± 3,8 mm. La ubicación del conducto alveolar inferior a nivel de rama respecto a los bordes anterior, posterior, lateral y medial fue 11,1 ± 2,6, 15,8 ± 2,7, 3,5 ± 1,0 y 1,9 ± 0,7 mm respectivamente. En el cuerpo mandibular la distancias respecto a los bordes basal, lateral, medial y alveolar fueron 10,1 ± 2,3, 4,7 ± 1,4, 2,5 ± 1,0 y 13,7 ± 2,7 mm respectivamente distal al tercer molar, 7,6 ± 1,7, 6,4 ± 1,4, 2,8 ± 1,0 y 16,4 ± 2,2 mm distal al segundo molar, 7,1 ± 1,5, 6,1 ± 1,3, 2,6 ± 0,8 y 17,0 ± 2,3 mm distal al primer molar, y 7,9 ± 1,7, 4,7 ± 1,2, 3,4 ± 1,2 y 18.3±2.7 mm distal al segundo premolar. El diámetro fue 2,82 ± 0,6 mm. La distancia del agujero mentoniano al borde basal fue 14,2 ± 1,59 mm, a la cresta alveolar 15,97 ± 2,87 mm, y se relacionó con el segundo premolar. CONCLUSIONES: los datos obtenidos, si bien, no infieren en la totalidad de la población colombiana, confirma que existen variaciones anatómicas del conducto alveolar inferior diferentes a las descritas en otras poblaciones. Abstract in english INTRODUCTION: the knowledge of anatomical variations of the inferior alveolar canal is necessary for surgical procedures involving the mandible. The purpose was to determine the relationships and anatomical variations of the mandibular canal. METHODS: a descriptive study was performed using 50 dry m [...] andibles measuring distances of the mandibular foramen with respect to the anterior posterior and lower borders and the sigmoid notch, distances from the mental foramen to the basal border and the alveolar crest. Cuts were done in ramus and body to determine the relationship with close anatomical structures. RESULTS: The mandibular foramen was found in 88% of the cases in the middle third of ramus. The distance from the foramen to the sigmoid notch was 19.78 ± 3.3 mm, to the anterior border was 17.46 ± 3.04 mm, to the posterior border was 12.2 ± 1.9 mm and to the inferior border was 26.4 ± 3.8 mm. The location of the inferior alveolar canal on the mandibular ramus with respect to the anterior, posterior, lateral and medial borders were 11.1 ± 2.6 mm, 15.8 ± 2.7 mm, 3.5 ±1.0 mm y 1.9 ± 0.7 mm respectively. On the mandibular body, the distances from the inferior alveolar canal to the inferior, lateral, medial and alveolar borders were 10.1 ± 2.3 mm, 4.7 ± 1.4 mm, 2.5 ± 1.0 mm and 13.7±2.7 mm respectively distal to the third molar, 7.6 ± 1.7 mm, 6.4 ± 1.4 mm, 2.8 ± 1.0 mm and 16.4 ± 2.2 mm distal to the second molar, 7.1 ± 1.5 mm, 6.1 ± 1.3 mm, 2.6 ± 0.8 mm and 17.0 ± 2.3 mm distal to the first molar, and 7.9 ± 1.7 mm, 4.7 ± 1.2 mm, 3.4 ± 1.2 mm and 18.3 ± 2.7 mm distal to the second bicuspid. The diameter was 2.82 ± 0.6 mm. The distance from the mental foramen to the inferior border was 14.2 ± 1.59 mm, to the alveolar crest was 15.97 ± 2.87 mm, and it was directly related to the second bicuspid. CONCLUSIONS: The data obtained, even though, do not infer in the totality of the Colombian population, confirms that there are anatomical variations of the inferior alveolar canal different from the ones

Omar Yamid, Ruge Jiménez; Oscar Andrés, Camargo Cañón; Yudy, Patricia Ortiz.

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The adaptive value of shoot differentiation in deciduous trees and its evolutionary relevance Valor adaptativo de la diferenciación de brotes en árboles deciduos y su relevancia evolutiva  

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Full Text Available Pronounced long shoot/short shoot differentiation is typical for deciduous angiosperm trees. It also occurs in a number of gymnosperms and very few evergreen angiosperm trees. The study of 719 angiosperm tree species (602 deciduous and 117 evergreen species demonstrated that the deciduous condition is nearly always associated with shoot differentiation. Detailed measurements in 38 angiosperms showed that the leaf area of an entire short shoot equals the leaf area of a single long shoot leaf of the same species and individual. In the few cases where the leaf area of the short shoot is slightly larger than that of a single long-shoot leaf, the short shoot leaves shade each other and the projection of the short shoot equals the area of a single long shoot leaf. Calculations of the stem biomass needed to expose a given assimilatory surface show two interesting aspects. First, the stem biomass (dry weight to expose leaf surface is about 10 times less in short shoots than in long shoots. Second, this biomass in long shoots and short shoots appears to be species independent. Regarding shoot structure efficiency, leaf size and shape do not matter. Some evergreen species resemble in all parameters more to deciduous species than to typical evergreen species. Phytogeographical data as well as morphological data suggest that these atypical evergreen species are derived from deciduous ancestors. As measured parameters differ markedly between all gymnosperms, except Ginkgo, and angiosperms, we suppose that the evolutionary pathway leading to shoot differentiation was different for gymnosperms and angiosperms.En Angiospermas arbóreas deciduas, es común encontrar un alto grado de diferenciación entre brotes largos y brotes cortos. También se presenta esta característica en un número de gimnospermas y en muy pocas angiospermas arbóreas siempreverdes. El estudio de 719 especies de angiospermas arbóreas (602 deciduas y 117 siempreverdes demostró que la condición decidua está casi siempre asociada a la diferenciación de los brotes. Mediciones detalladas en 38 angiospermas demostraron que la totalidad del área foliar de un brote corto es semejante al área foliar de una hoja de un brote largo de la misma especie y del mismo individuo. En los pocos casos en que el área foliar del brote corto es levemente mayor que el área de una hoja de un brote largo, las hojas del brote corto se sombrean entre sí de manera que el área proyectada del brote corto se asemeja a la de la hoja del brote largo. Cálculos de la biomasa de tallo necesaria para soportar una determinada superficie asimilatoria mostraron dos aspectos interesantes. Primero, que la biomasa de tallo (peso seco de soporte del área foliar is alrededor de 10 veces menor en brotes cortos que en brotes largos. Segundo, que esta biomasa en brotes largos y brotes cortos parece ser independiente de la especie. En cuanto a la eficiencia estructural de los brotes, el tamano y la forma de las hojas no son relevantes. Algunas especies siempreverdes se asemejan en todos sus parámetros más a las especies deciduas que a especies siempreverdes típicas. Datos fitogeográficos así como datos morfológicos sugieren que estas especies siempreverdes atípicas derivaron de ancestros deciduos. Como todos los parámetros medidos difieren notablemente entre todas las gimnospermas, excepto Ginkgo, y las angiospermas, suponemos que el camino evolutivo que condujo a la diferenciación de brotes fue diferente en gimnospermas y angiospermas.

Veit M. Dörken

2009-12-01

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Isolated inferior mesenteric portal hypertension with giant inferior mesenteric vein and anomalous inferior mesenteric vein insertion  

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Extrahepatic portal hypertension is not an uncommon disease in childhood, but isolated inferior mesenteric portal varices and lower gastrointestinal (GI) bleed have not been reported till date. A 4-year-old girl presented with lower GI bleed. Surgical exploration revealed extrahepatic portal vein obstruction with giant inferior mesenteric vein and colonic varices. Inferior mesenteric vein was joining the superior mesenteric vein. The child was treated successfully with inferior mesenteric –...

2013-01-01

85

Embarazo molar repetido: Caso clínico  

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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.

Leonor Zapata

2002-03-01

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Fusión de un tercer molar mandibular con un cuarto molar supernumerario / Fusion of mandibular third molar with supernumerary fourth molar  

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Full Text Available SciELO Spain | Language: Spanish Abstract in spanish La fusión dental es la unión de dos gérmenes dentales normalmente separados, mientras que la geminación se define como el intento de división de un único germen dental. La fusión y geminación de molares es poco frecuente en la dentición permanente. Describimos un caso clínico de un tercer molar infe [...] rior derecho fusionado a un cuarto molar supernumerario en un paciente varón de 36 años que ha presentado repetidos episodios de pericoronaritis. Tras el estudio radiológico se realiza la exodoncia del cordal semiincluido bajo anestesia local. Llevamos a cabo una revisión bibliográfica al respecto. Abstract in english Dental fusion is the union of two tooth buds that normally are separated, while gemination is defined as an attempt by a single tooth bud to divide. The fusion and gemination of molars is uncommon in permanent teeth. We report a clinical case of a right lower third molar fused to a supernumerary fou [...] rth molar in a 36-year-old male patient with repeated episodes of inflammation. After the radiologic study, the semi-impacted third molar was extracted under local anesthesia. The literature was reviewed.

C., López Carriches; I., Leco Berrocal; R., Baca Pérez-Bryan.

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Mandibular Third Molar Impaction: Review of Literature and a Proposal of a Classification  

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Full Text Available Objectives: The purpose of present article was to review impacted mandibular third molar aetiology, clinical anatomy, radiologic examination, surgical treatment and possible complications, as well as to create new mandibular third molar impaction and extraction difficulty degree classification based on anatomical and radiologic findings and literature review results.Material and Methods: Literature was selected through a search of PubMed, Embase and Cochrane electronic databases. The keywords used for search were mandibular third molar, impacted mandibular third molar, inferior alveolar nerve injury third molar, lingual nerve injury third molar. The search was restricted to English language articles, published from 1976 to April 2013. Additionally, a manual search in the major anatomy and oral surgery journals and books was performed. The publications there selected by including clinical and human anatomy studies.Results: In total 73 literature sources were obtained and reviewed. Impacted mandibular third molar aetiology, clinical anatomy, radiographic examination, surgical extraction of and possible complications, classifications and risk factors were discussed. New mandibular third molar impaction and extraction difficulty degree classification based on anatomical and radiologic findings and literature review results was proposed. Conclusions: The classification proposed here based on anatomical and radiological impacted mandibular third molar features is promising to be a helpful tool for impacted tooth assessment as well as for planning for surgical operation. Further clinical studies should be conducted for new classification validation and reliability evaluation.

Gintaras Juodzbalys

2013-06-01

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Isolated inferior mesenteric portal hypertension with giant inferior mesenteric vein and anomalous inferior mesenteric vein insertion.  

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Extrahepatic portal hypertension is not an uncommon disease in childhood, but isolated inferior mesenteric portal varices and lower gastrointestinal (GI) bleed have not been reported till date. A 4-year-old girl presented with lower GI bleed. Surgical exploration revealed extrahepatic portal vein obstruction with giant inferior mesenteric vein and colonic varices. Inferior mesenteric vein was joining the superior mesenteric vein. The child was treated successfully with inferior mesenteric - inferior vena caval anastomosis. The child was relieved of GI bleed during the follow-up. PMID:23798814

Prasad, G Raghavendra; Billa, Srikar; Bhandari, Pavaneel; Hussain, Aijaz

2013-04-01

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Molar aspirado al árbol traqueobronquial  

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Full Text Available Se reporta el caso de una niña de 11 años con neumonías a repetición focalizadas en el mismo segmento pulmonar. Refería antecedente de exodoncia con aspiración del molar dos años antes, que coincidía con el inicio de las infecciones pulmonares. En el último episodio se sospecha y comprueba la presencia de un molar en lóbulo medio, que se extrae por bronscoscopia rígida, sin complicaciones.

JUAN CAMILO OSPINA GARCu00CDA

2011-01-01

90

Extrações de molares na Ortodontia / Molar extractions in orthodontics  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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.

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

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Extrações de molares na Ortodontia Molar extractions in orthodontics  

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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.

Marco Antônio Schroeder

2011-12-01

92

Relation between mandibular third molar and mandibular canal assessed by computed tomography  

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During the removal of the mandibular third molar, the inferior alveolar nerve in the canal sometimes damaged. To avoid this complication, it is necessary to understand the positional relationship between the mandibular third molar and the mandibular canal. We evaluated the relationship between the mandibular 3rd molar and the mandibular canal with panoramic X-p and computed tomography (CT). Eighty-six (50.0%) mandibular canals were buccal type, 64 were inferior type, 18 were lingal type, and 4 were between the roots type on CT findings. 137 (79.7%) canal pattern were round type, 35 were flatness type. 109 (63.4%) presence of bone were interposition type, 63 were non-interposition type. Among 172 third molar extraction, hypesthesia of lower lip was observed in 3 cases and inferior alveolar nerve was exposed in 3 teeth. There was no overlap between hypesthesia and nerve exposure. CT provides useful information to surgeons regarding the relationship between the mandibular third molar and the mandibular canal. (author)

2008-01-01

93

Anesthetic technique for inferior alveolar nerve block: a new approach  

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Full Text Available SciELO Brazil | Language: English Abstract in english 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.

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

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Anesthetic technique for inferior alveolar nerve block: a new approach  

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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 region. 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.

Dafna Geller Palti

2011-02-01

95

Histological evaluation of mandibular third molar roots retrieved after coronectomy.  

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There is a resurgence of interest in coronectomy for the management of mandibular third molars because it has a low risk of injury to the inferior dental nerve. However, there is concern that the root that is left in place will eventually become a source of infection. We describe the histological evaluation of 26 consecutive symptomatic coronectomy roots in 21 patients. All roots had vital tissue in the pulp chamber and there was no evidence of periradicular inflammation. Persistent postoperative symptoms related predominantly to inflammation of the soft tissue, which was caused by partially erupted roots or failure of the socket to heal. PMID:24684971

Patel, Vinod; Sproat, Chris; Kwok, Jerry; Beneng, Kiran; Thavaraj, Selvam; McGurk, Mark

2014-05-01

96

Mini-implants: mechanical resource for molars uprighting  

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Full Text Available INTRODUCTION: The early orthodontic treatment allows correction of skeletal discrepancies by growth control, and the elimination of deleterious habits, which are risk factors for the development of malocclusions, favoring for the correction of tooth positioning later in a second treatment stage. During development of teeth and occlusion, the mandibular second molars commonly erupt in the oral cavity after all other teeth of the anterior region. In their eruptive process there may be a condition known as tooth impaction, which precludes its complete eruption and requires proper uprighting treatment. The temporary anchorage devices allow disimpaction and movement of these teeth directly to their final position, without the need of patient compliance or reaction movements in other parts of the arch. OBJECTIVE: This paper aims at describing a case report of the treatment of a patient with Angle Class II malocclusion, performed in two phases, in which mini-implants were used for uprighting the impacted mandibular second molars.INTRODUÇÃO: o tratamento ortodôntico precoce permite a correção das discrepâncias esqueléticas por meio do controle de crescimento e a eliminação de hábitos deletérios, que são fatores de risco para o desenvolvimento de más oclusões, que favorecem a correção do posicionamento dentário mais tardiamente, em uma segunda fase do tratamento. Durante o desenvolvimento da dentição e da oclusão, normalmente o segundo molar inferior chega à cavidade bucal após todos os dentes posicionados anteriormente a ele. Durante seu processo eruptivo, pode ocorrer uma condição chamada "impacção dentária", em que sua erupção completa é interrompida, exigindo tratamento apropriado para verticalização. Os dispositivos temporários de ancoragem permitem a desimpacção e a movimentação desses dentes diretamente às suas posições finais, sem a necessidade de cooperação do paciente e sem movimento de reação nas outras unidades da arcada. OBJETIVO: descrever o tratamento de um caso de má oclusão Classe II de Angle, realizado em duas fases, durante o qual foram utilizados mini-implantes para verticalização dos segundos molares inferiores impactados.

Susiane Allgayer

2013-02-01

97

Luxatio erecta: Inferior glenohumeral dislocation  

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Inferior dislocation of the shoulder, also called luxatio erecta, is a rare form of the otherwise common shoulder dislocation. It accounts for less than 0.5% of all shoulder dislocations. A case involving the inferior dislocation of the shoulder is reported. A brief review of the presentation and management of the condition is described.

Baba Asif; Bhat Javid; Paljor S; Mir Naseer; Majid Suhail

2007-01-01

98

Luxatio erecta: Inferior glenohumeral dislocation  

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Full Text Available Inferior dislocation of the shoulder, also called luxatio erecta, is a rare form of the otherwise common shoulder dislocation. It accounts for less than 0.5% of all shoulder dislocations. A case involving the inferior dislocation of the shoulder is reported. A brief review of the presentation and management of the condition is described.

Baba Asif

2007-01-01

99

Transposition of inferior vena cava  

International Nuclear Information System (INIS)

An incidentally detected transposition of the inferior vena cava in patient with gall bladder carcinoma is reported with discussion of findings of CT scan and review of anomalies of the inferior vena cava. Since anomalous vena cava may simulate any other abnormality such as metastatic disease, it is very important to know anomaly of the vena cava with understanding of its embryological background.

1986-08-01

100

Transposition of inferior vena cava  

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An incidentally detected transposition of the inferior vena cava in patient with gall bladder carcinoma is reported with discussion of findings of CT scan and review of anomalies of the inferior vena cava. Since anomalous vena cava may simulate any other abnormality such as metastatic disease, it is very important to know anomaly of the vena cava with understanding of its embryological background.

Seung, In Don; Kim, Yang Soo; Kim, Kun Sang [Chung-Aug University, Seoul (Korea, Republic of)

1986-08-15

 
 
 
 
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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  

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Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish 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).

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

102

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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.

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

103

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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.

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

104

Inferior Vena Cava Filter Placement and Removal  

Science.gov (United States)

Inferior Vena Cava Filter Placement and Removal • Overview In an inferior vena cava filter placement procedure, interventional radiologists use image guidance to place a filter in the inferior vena cava (IVC), the large vein in the abdomen ...

105

[Bilateral mandibular fourth molars: a case report].  

Science.gov (United States)

The occurrence of supernumerary teeth is a relatively rare dental dysplasia. Permanent fourth molars are seldom observed in humans. A case of bilateral mandibular fourth molar is reported in this paper. PMID:24298812

Wang, Xiao; Pan, Xiangyong

2013-10-01

106

Maxillary First Molar with Two Root Canals  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Knowledge regarding the anatomic morphology of maxillary molars is absolutely essential for the success of endodontic treatment. The morphology of the permanent maxillary first molar has been reviewed extensively; however, the presence of two canals in a two-rooted maxillary first molar has rarely been reported in studies describing tooth and root canal anatomies. This case report presents a patient with a maxillary first molar with two roots and two root canals, who was referred to the Depar...

Saeed Rahimi; Negin Ghasemi

2013-01-01

107

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  

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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 su...

Samar Fatemi; Sonbol Fatemi; Maryam Boojarpoor

2013-01-01

108

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

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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 ...

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

2007-01-01

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Distancia entre los orificios de entrada a los conductos radiculares en los primeros molares maxilares y mandibulares / Distance between root canal orifices in maxillary and mandibular first molars  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish En el presente estudio in vivo, se evaluó en la cámara pulpar de los primeros molares maxilares y mandibulares, la distancia entre los orificios de entrada a los conductos radiculares. Se emplearon 60 primeros molares (30 maxilares y 30 mandibulares), con pulpa vital. Efectuada la apertura y localiz [...] ación de cada orificio de entrada a los conductos, con una cámara intraoral y su programa informático de mediciones, se obtuvieron fotos del piso de la cámara pulpar y sobre ellas, las medidas de las distancias entre cada orificio de entrada a los conductos radiculares. Los especímenes evaluados se agruparon en casos con tres y cuatro orificios de entrada. Los resultados estadísticos demostraron que en los molares inferiores con tres orificios de entrada se obtuvo un grupo homogéneo representado por las distancias MV-ML, ML-DL y MV-DV, las que resultaron significativamente superiores a la distancia DV-DL. En los molares superiores cuando los orificios de entrada fueron tres, las distancias obtenidas fueron diferentes. Cuando se localizaron cuatro orificios de entrada, las medias se agruparon en tres grupos homogéneos. Abstract in english This in vivo study evaluates the distance between the entrance to each root canal in 60 first molars, 30 maxillary and 30 mandibular, with vital pulp. Upon pulp chamber opening and canal orifice location, using an intraoral camera and measuring software, photographs were taken of the pulp floor and [...] the distances between orifices determined. Specimens were grouped according to number of canal orifices found, 3 or 4. Statistical analyses showed that in lower molars having 3 canal orifices a homogeneous group was formed with 3 distances MB-ML, ML-DL and MB-DB, these being significantly larger than DB-DL. In upper molars with 3 orifices, the distances differed. Means of molars showing 4 orifices comprised 3 homogeneous groups.

Harrán-Ponce, Elías; Vilar-Fernández, José Antonio.

110

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)

Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

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

111

Anaesthetic Challenges in Molar Pregnancy  

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Full Text Available Gestational Trophoblastic Disease (GTD is a spectrum of tumours with a wide range of biologic behaviour and potential for metastases, which were often fatal in the past. However, with better understanding of patho-physiology in the last few years, most women can now be cured. A Hydatidiform Mole (or Molar Pregnancy is a benign Gestational Trophoblastic Disease that originates from the placenta. Treatment consists of vacuum evacuation but rarely hysterectomy may be required. Anaesthetic management is often complicated by the associated systemic derangements.

Ghansham Biyani

2013-06-01

112

Anaesthetic Challenges in Molar Pregnancy  

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Full Text Available Gestational Trophoblastic Disease (GTD is a spectrum of tumours with a wide range of biologic behaviour and potential for metastases, which were often fatal in the past. However, with better understanding of patho-physiology in the last few years, most women can now be cured. A Hydatidiform Mole (or Molar Pregnancy is a benign Gestational Trophoblastic Disease that originates from the placenta. Treatment consists of vacuum evacuation but rarely hysterectomy may be required. Anaesthetic management is often complicated by the associated derangements.

Ghansham Biyani

2013-06-01

113

Mini-implants: mechanical resource for molars uprighting  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese INTRODUÇÃO: o tratamento ortodôntico precoce permite a correção das discrepâncias esqueléticas por meio do controle de crescimento e a eliminação de hábitos deletérios, que são fatores de risco para o desenvolvimento de más oclusões, que favorecem a correção do posicionamento dentário mais tardiamen [...] te, em uma segunda fase do tratamento. Durante o desenvolvimento da dentição e da oclusão, normalmente o segundo molar inferior chega à cavidade bucal após todos os dentes posicionados anteriormente a ele. Durante seu processo eruptivo, pode ocorrer uma condição chamada "impacção dentária", em que sua erupção completa é interrompida, exigindo tratamento apropriado para verticalização. Os dispositivos temporários de ancoragem permitem a desimpacção e a movimentação desses dentes diretamente às suas posições finais, sem a necessidade de cooperação do paciente e sem movimento de reação nas outras unidades da arcada. OBJETIVO: descrever o tratamento de um caso de má oclusão Classe II de Angle, realizado em duas fases, durante o qual foram utilizados mini-implantes para verticalização dos segundos molares inferiores impactados. Abstract in english INTRODUCTION: The early orthodontic treatment allows correction of skeletal discrepancies by growth control, and the elimination of deleterious habits, which are risk factors for the development of malocclusions, favoring for the correction of tooth positioning later in a second treatment stage. Dur [...] ing development of teeth and occlusion, the mandibular second molars commonly erupt in the oral cavity after all other teeth of the anterior region. In their eruptive process there may be a condition known as tooth impaction, which precludes its complete eruption and requires proper uprighting treatment. The temporary anchorage devices allow disimpaction and movement of these teeth directly to their final position, without the need of patient compliance or reaction movements in other parts of the arch. OBJECTIVE: This paper aims at describing a case report of the treatment of a patient with Angle Class II malocclusion, performed in two phases, in which mini-implants were used for uprighting the impacted mandibular second molars.

Allgayer, Susiane; Platcheck, Deborah; Vargas, Ivana Ardenghi; Loro, Raphael Carlos Drumond.

114

La hiperdontia en región de molares / Hyperdontia in molar region  

Scientific Electronic Library Online (English)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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.

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

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

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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.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 mandibular 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.

Ivan Tadeu Pinheiro da Silva

2010-08-01

116

Positional relationship between mandibular third molar and mandibular canal in cone beam computed tomographs  

International Nuclear Information System (INIS)

To provide diagnostic information by evaluation of the positional relationship between the mandibular third molar and the mandibular canal. Eighty-nine mandibular third molars were classified as mesioangular, horizontal, vertical, distoangular groups. The distances between the mandibular third molar and the mandibular canal were measured in cone-beam computed tomographs. The height and width ratios of distances from the mandibular third molar and the mandibular canal to the mandibular inferior border and to the lingual cortical plate were calculated. The vertical and buccolingual distances between the mandibular third molar and the mandibular canal were 0.03 mm, 2.96 mm in the mesioangular, 0.37 mm, 3.38 ,, in the horizontal, -1.50 mm, 1.38 mm in the vertical, -1.10 mm, 4.20 mm in the distoangular group. There were significant differences in vertical (P0.05). The height and width ratios of distances on the mandibular third molar were 47.1%, 36.1% in the mesioangular, 47.4%, 34.4% in the horizontal, 37.0%, 46.7% in the vertical, 40.9%, 37.4% in the distoangular group. There were significant differences between the mesioangular and the vertical group, and the horizontal and the vertical group in height ratio (P>0.05). The mesioangular group showed the nearest distance between the mandibular third molar and the mandibular canal vertically. The root apex of the mandibular third molar was positioned more buccally in the vertical group than in the mesioangular group

2007-12-01

117

MB2 in maxillary second molar  

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Full Text Available Occurrence of the second mesiobuccal canal (MB2 is a frequent finding. Literary reports have shown it to be found more in the cases of the maxillary first molar. However the maxillary second molars have also been found with this variation in a number of canals. This paper presents a case report on the occurrence of a second mesiobuccal canal or the MB2 in the maxillary second molar.

Prakash R

2007-01-01

118

MB2 in maxillary second molar  

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Occurrence of the second mesiobuccal canal (MB2) is a frequent finding. Literary reports have shown it to be found more in the cases of the maxillary first molar. However the maxillary second molars have also been found with this variation in a number of canals. This paper presents a case report on the occurrence of a second mesiobuccal canal or the MB2 in the maxillary second molar.

Prakash R; Bhargavi N; Rajan Jeyavel; Joseph Reuben; Velmurugan N; Kandaswamy D

2007-01-01

119

MB2 in maxillary second molar.  

Science.gov (United States)

Occurrence of the second mesiobuccal canal (MB2) is a frequent finding. Literary reports have shown it to be found more in the cases of the maxillary first molar. However the maxillary second molars have also been found with this variation in a number of canals. This paper presents a case report on the occurrence of a second mesiobuccal canal or the MB2 in the maxillary second molar. PMID:17347545

Prakash, R; Bhargavi, N; Rajan, Jeyavel; Joseph, Reuben; Velmurugan, N; Kandaswamy, D

2007-01-01

120

Mandibular first molar with three distal canals  

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With the increasing number of reports of aberrant root canal morphology, the clinician needs to be aware of the variable anatomy. Various case reports have been published with the finding of middle mesial canal in mandibular first molar, however finding of middle distal canal in distal root of mandibular first molar is rare. This case report describes root canal treatment of two rooted mandibular first molar with five root canals (three in distal and two in mesial root), and Sert and Bayirli ...

Jain, Shweta

2011-01-01

 
 
 
 
121

Efficacy of low level laser therapy on neurosensory recovery after injury to the inferior alveolar nerve  

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Abstract Background The most severe complication after the removal of mandibular third molars is injury to the inferior alveolar nerve or the lingual nerve. These complications are rather uncommon (0.4% to 8.4%) and most of them are transient. However, some of them persist for longer than 6 months, which can leave various degrees of long-term permanent disability. While several methods such as pharmacologic therapy, microneurosurgery, autogenous and alloplastic grafting can b...

Ozen Tuncer; Orhan Kaan; Gorur Ilker; Ozturk Adnan

2006-01-01

122

"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)

Full Text Available SciELO Mexico | Language: Spanish Abstract in spanish 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.

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

123

Aneurysms of the inferior vena cava.  

Science.gov (United States)

Two cases of saccular aneurysms of the infrarenal inferior vena cava (IVC) associated with retrohepatic IVC obstruction are described. Ultrasonographic, computerized tomographic and inferior venacavography findings in these cases are presented. PMID:12581068

Sheth, Rahul; Hanchate, Vijay; Rathod, Krantikumar; Ahmed, Iftikhar; Deshmukh, Hemant; Chaubal, Nitin

2003-03-01

124

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)

Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

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

125

Acute inflammation at a mandibular solitary horizontal incompletely impacted molar  

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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 inflammati...

2009-01-01

126

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)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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.

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

127

General technique of third molar removal.  

Science.gov (United States)

The most commonly performed surgical procedure in most oral and maxillofacial surgery practices is the removal of impacted third molars. Extensive training, skill, and experience allow this procedure to be performed in an atraumatic fashion with local anesthesia, sedation, or general anesthesia. The decision to remove symptomatic third molars is not usually difficult, but the decision to remove asymptomatic third molars is sometimes less clear and requires clinical experience. A wide body of literature (discussed elsewhere in this issue) attempts to establish clinical practice guidelines for dealing with impacted teeth. Data is beginning to accumulate from third molar studies, which hopefully will provide surgeons and their patients with evidence-based guidelines regarding elective third molar surgery. PMID:18088862

Farish, Sam E; Bouloux, Gary F

2007-02-01

128

Molar ectopic pregnancy in the uterine cornus.  

Science.gov (United States)

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

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

2010-01-01

129

Detection of Root Canal Isthmuses in Molars by Map-Reading Dynamic using CBCT images  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese O objetivo deste estudo foi detectar a presença de istmos em molares superiores e inferiores, e avaliar a frequência usando dinâmica de navegação em imagens de tomografia computadorizada de feixe cônico (TCFC). Duzentos molares superiores e inferiores humanos foram usados em ensaio ex vivo. Uma amos [...] tra consecutiva de duzentos molares (superiores e inferiores, primeiros e segundos) foi selecionada a partir de exames de TCFC. Os istmos foram detectados a partir do orifício de entrada da cavidade pulpar em direção ao ápice, de acordo com o início e o fim, nas categorias: 1. início e término no terço cervical; 2. início no terço cervical e término no terço médio; 3. início no terço cervical e término no terço apical; 4. início e fim no terço médio; 5. início no terço médio e término no terço apical; 6. início e término no terço apical ; 7. ausência de istmo radicular. Os exames de TCFC foram obtidos em diferentes planos com estratégias de navegação em cortes axiais de 0,5 mm/0.5 mm de coronal para a direção apical. As frequências de istmo radicular foram analisadas de acordo com o terço da raiz e avaliadas pelo teste do qui-quadrado. O nível de significância estabelecido foi de 5%. A presença de istmo radicular em molares superiores foi de 86% em ensaio ex vivo e 62% em ensaio in vivo, enquanto que, em molares inferiores foram observados 70% em ensaio ex vivo e 72% em ensaio vivo. A frequência radicular de istmo foi elevada em ambos os modelos de estudo. A dinâmica da estratégia de navegação em imagens de TCFC é precisa para detectar a localização do istmo radicular. Abstract in english The aim of this study was to detect root isthmuses in maxillary and mandibular molars and evaluate their frequencies using map-reading dynamics in CBCT images. Two hundred extracted human maxillary and mandibular molars were used in ex vivo assay. A consecutive sample of two hundred maxillary and ma [...] ndibular molars (first and second) was selected from CBCT exams. The isthmuses were detected from the pulp orifice to the apex and were recorded according to their beginning and their end, into categories: 1. begin and end in cervical third; 2. beginning in cervical third and end in middle third; 3. beginning in cervical third and end in apical third; 4. beginning and end in middle third; 5. begin in middle third and end in apical third; 6. beginning and end in apical third; 7. no isthmus. The scans were obtained in different planes with map-reading in axial slices of 0.5 mm/0.5 mm involved the coronal to apical direction. The frequencies of isthmus were analyzed according to the level of root and evaluated by Chi-square test. The level of significance was set at ?=0.05. The presence of isthmus detected in maxillary molars was 86% in ex vivo assay and 62% in vivo assay, whereas in mandibular molars was observed 70% in ex vivo assay and 72% in vivo assay. The frequency of isthmus was high in both study models. The map-reading dynamics in CBCT images was found to be precise to detect the localization of isthmus.

Jesus Djalma, Pecora; Carlos, Estrela; Mike Reis, Bueno; Olavo Cesar, Porto; Ana Helena Goncalves, Alencar; Manoel Damiao, Sousa-Neto; Cyntia Rodrigues de Araujo, Estrela.

130

Unilateral molar distalization with a modified slider.  

Science.gov (United States)

Although there are numerous publications on bilateral non-compliance molar distalization appliances, there is limited information on problems such as asymmetrical unilateral Class II malocclusions. The aim of the present investigation was to examine the distalization of molars unilaterally in patients with a unilateral Class II molar relationship utilizing a Keles Slider, designed without a bite plane. Ten girls (mean age 13.94 +/- 2.13 years) and seven boys (mean age 13.12 +/- 1.51 years) comprised the study material. Following insertion of the appliance, the patients were seen monthly and the screw was reactivated every 2 months. After a super-Class I molar relationship was achieved, the appliance was removed and the molars were stabilized with a Nance appliance for 2 months before the second-phase of orthodontic treatment. The Nance appliance was maintained in the palate until the end of canine distalization. Lateral cephalometric radiographs were obtained before and immediately after insertion of the molar distalizer. The results showed that the maxillary first molars were distalized bodily on average by 2.85 mm. The maxillary first premolars moved forward bodily 2 mm and were extruded 2.03 mm. In all, 1.32 mm of protrusion, 1.12 mm of extrusion, and 1.79 degrees of proclination of the upper incisors were observed. The mandibular incisors and mandibular molars erupted 0.83 and 0.95 mm, respectively. The unilateral Keles Slider distalized molars successfully to a Class I molar relationship. PMID:16648210

Sayinsu, Korkmaz; Isik, Fulya; Allaf, Ferdi; Arun, Tülin

2006-08-01

131

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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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.

C. Recio Lora

2009-08-01

132

Acute inflammation at a mandibular solitary horizontal incompletely impacted molar  

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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

Minoru Yamaoka

2009-04-01

133

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  

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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 del 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.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.

R Fuentes

2012-08-01

134

Treatment of ectopic first permanent molar teeth.  

LENUS (Irish Health Repository)

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.

Hennessy, Joe

2012-11-01

135

Unilateral molar distalization: a nonextraction therapy.  

Science.gov (United States)

In the recent years, nonextraction treatment approaches and noncompliance therapies have become more popular in the correction of space discrepancies. One of the conventional approaches for space gaining in the arches without patient compliance is done by using certain extra oral appliances or intraoral appliance. The greatest advantage of certain appliances like fixed functional and molar distalization appliances is that they minimize the dependence on patient cooperation. Molar distalization appliances like pendulum appliance which distalizes the molar rapidly without the need of head gear can be used in patients as a unilateral space gaining procedure due to buccal segment crowding. PMID:23320203

Prasad, M Bhanu; Sreevalli, S

2012-01-01

136

Efficiency of molar distalization with the XBow appliance related to second molar eruption stage.  

Science.gov (United States)

To quantitatively evaluate on lateral cephalograms horizontal, vertical, and angular changes in the position of the maxillary first molar based on the presence and absence of erupted maxillary second molars when it is distalized with the XBow appliance. In this retrospective study, a total of 102 consecutively treated cases were assessed. Lateral cephalograms were obtained at the start and after completion of active treatment with the XBow appliance. In one group of patients, distal movement of the maxillary first molars was performed before the eruption of maxillary second molars; in the other group of patients, both first and second maxillary molars were simultaneously moved distally. All cephalograms were superimposed on palatal plane using the method of best-fit. In order to compare the mean horizontal, vertical, and angular changes in molar position between the treatment groups and gender, a multivariate analysis of covariance (MANCOVA) was performed with the pre-treatment class II severity used as a covariate. Regression analysis was also performed to further explore any possible relationships between the predictor variables and the quantity and quality of distalization. A MANCOVA revealed that the eruption stage of the maxillary second molar did not have a significant effect on the change in position of the maxillary first molar after treatment with a XBow appliance. When distalizing maxillary first molars with a XBow appliance, there is no difference in the amount of distalization in patients with erupted and unerupted maxillary second molars. PMID:23172578

Flores-Mir, Carlos; McGrath, L M; Heo, G; Major, P W

2013-12-01

137

Fabrication and Evaluation of a Noncompliant Molar Distalizing Appliance: Bonded Molar Distalizer  

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Full Text Available Objective: Attempts to treat class II malocclusions without extraction in non-compliant patients have led to utilization of intraoral molar distalizing appliances. The purpose of this study was to investigate dental and skeletal effects of Bonded Molar Distalizer (BMD which is a simple molar distalizing appliance.Materials and Methods: Sixteen patients (12 girls, four boys with bilateral half-cusp class II molar relationship, erupted permanent second molars and normal or vertical growth pattern were selected for bilateral distalization of maxillary molars via BMD. Thescrews were activated every other day, alternately. Lateral cephalograms and study models were obtained before treatment and after 11 weeks activation of the appliance.Results: Significant amounts of molar distalization, molar distal tipping and anchorage loss were observed. The mean maxillary first molar distal movement was 1.22±0.936 mm with a distal tipping of 2.97±3.74 degrees in 11 weeks. The rate of distal movement was0.48 mm per month. Reciprocal mesial movement of the first premolars was 2.26±1.12 mm with a mesial tipping of 4.25±3.12 degrees. Maxillary incisors moved 3.55±1.46 mm and tipped 9.87±5.03 degrees mesially. Lower anterior face height (LAFH decreased 1.28±1.36 mm.Conclusion: BMD is appropriate for distalizing maxillary molars, especially in patients with critical LAFH, although significant amounts of anchorage loss occur using this appliance.

S. Arab

2011-09-01

138

Coronectomy to prevent damage to the inferior alveolar nerve.  

Science.gov (United States)

Conventional wisdom advises that when a tooth needs to be extracted, the whole tooth should be removed, usually with as little surrounding bone as possible. However, the evidence to support this is not compelling, and every dentist has experienced cases where the apices of teeth are not removed for a variety of reasons and, in most cases, the patient seems to suffer no ill effects. If one extrapolates from this, it is evident that there might be instances where it is actually preferable to leave the apical part of the root rather than remove it, and this can be carried out deliberately. The usual time that one would consider this is when the inferior alveolar nerve is intimately related to the roots of the lower molar teeth, and this occurs most often in relation to the third molar. This concept of deliberately removing only the crown and part of the root of the tooth is known variously as coronectomy, partial root removal, deliberate vital root retention, or partial odontectomy. PMID:19591330

Pogrel, Michael Anthony

2009-06-01

139

Traumatismos de veia cava inferior Inferior vena cava injuries  

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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.

Cleinaldo de Almeida Costa

2005-10-01

140

Canal complexity of a mandibular first molar  

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Full Text Available The endodontic treatment of a mandibular molar with aberrant canal configuration can be diagnostically and technically challenging. This case report presents the treatment of a mandibular first molar with five root canals, of which three were located in the mesial root. A third canal was found between the mesiobuccal and mesiolingual root canals. The morphological pattern of separate apical terminations of three mesial root canals with separate orifices, as manifested in this case, is a rare one.

Poorni S

2009-01-01

 
 
 
 
141

Canal complexity of a mandibular first molar  

Digital Repository Infrastructure Vision for European Research (DRIVER)

The endodontic treatment of a mandibular molar with aberrant canal configuration can be diagnostically and technically challenging. This case report presents the treatment of a mandibular first molar with five root canals, of which three were located in the mesial root. A third canal was found between the mesiobuccal and mesiolingual root canals. The morphological pattern of separate apical terminations of three mesial root canals with separate orifices, as manifested in this case, is a rare ...

Poorni S; Kumar R.; Indira R

2009-01-01

142

Unilateral Molar Distalization: A Nonextraction Therapy  

Digital Repository Infrastructure Vision for European Research (DRIVER)

In the recent years, nonextraction treatment approaches and noncompliance therapies have become more popular in the correction of space discrepancies. One of the conventional approaches for space gaining in the arches without patient compliance is done by using certain extra oral appliances or intraoral appliance. The greatest advantage of certain appliances like fixed functional and molar distalization appliances is that they minimize the dependence on patient cooperation. Molar distalizatio...

Prasad, M. Bhanu; Sreevalli, S.

2012-01-01

143

Maxillary molar distalization with first class appliance.  

Science.gov (United States)

Non-extraction treatment has gained popularity for corrections of mild-to-moderate class II malocclusion over the past few decades. The distalization of maxillary molars is of significant value for treatment of cases with minimal arch discrepancy and mild class II molar relation associated with a normal mandibular arch and acceptable profile. This paper describes our experience with a 16-year-old female patient who reported with irregularly placed upper front teeth and unpleasant smile. The patient was diagnosed to have angles class II malocclusion with moderate maxillary anterior crowding, deep bite of 4 mm on a skeletal class II base with an orthognathic maxilla and retrognathic mandible and normal growth pattern. She presented an ideal profile and so molar distalization was planned with the first-class appliance. Molars were distalised by 8 mm on the right and left quadrants and class I molar relation achieved within 4 months. The space gained was utilised effectively to align the arch and establish a class I molar and canine relation. PMID:24577171

Ramesh, Namitha; Palukunnu, Biswas; Ravindran, Nidhi; Nair, Preeti P

2014-01-01

144

A study of the correlation between second molar distal caries and third molar eruption  

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Full Text Available This study aims to analyse the correlation parameters between second molar distal caries and third molar eruption. Materials and methods: 73 cases of patients who had their third impacted or semi-impacted molars removed,were studied; they were retrieved from the archive of a private practice. The following parameters were evaluated:patients’ gender, second molars distal caries,angulation, impaction plane and mesio-distal distance between the third and second molars. Results: Of the 73 cases that were studied, 21 involved second molar distal caries (28.8%, while in 52 cases the second molars were free of caries (71.2%. Within the first group, 66.6% of the cases involved third molar distal angulation of 41°-60° and 61°-80°, with type A impaction planes in 86% and the mesio-distal distance ranging between 10 – 12 mm in 52.4%. Conclusion: Erupting third morals need to be prophylactically extracted if there is a significant risk of developing caries in adjacent second molars.

Chrisa DIVANIDOU

2012-12-01

145

Third molar surgery: the patient's and the clinician's perspective  

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Full Text Available Abstract Background In this report, the problems of third molar surgery have been reviewed from the perspective of both patient and clinician; additionally an overall analysis of preoperative imaging investigations was carried out. Specifically, three main areas of interest were investigated: the prediction of surgical difficulty and potential complications; the assessment of stress and anxiety and finally the assessment of postoperative complications and the surgeon's experience. Findings In the first study, the prediction of surgical difficulty and potential injury to the inferior alveolar nerve was assessed. This was achieved by examining the patient's orthopantomograms and by using the Pederson Difficulty Index (PDI. Several radiological signs were identified and a classification tree was created to help predict the incidence of such event. In the second study, a prospective assessment addressing the patient's stress and anxiety pre-, intra- and postoperatively was employed. Midazolam was the active drug used against placebo. Objective and subjective parameters were assessed, including measuring the cortisol level in saliva. Midazolam was found to significantly reduce anxiety levels and salivary cortisol was identified as an accurate anxiety marker. In the third study, postoperative complications and the surgeon's experience were examined. Few patients in this study suffered permanent nerve dysfunction. Junior surgeons reported a higher complication rate particularly in trismus, alveolar osteitis, infection and paraesthesia over the distributions of the inferior alveolar and lingual nerves. In apparent contrast, senior surgeons reported higher incidence of postoperative bleeding. Discussion These studies if well employed can lead to favourable alteration in patient management and might have a positive impact on future healthcare service.

Jerjes Waseem

2009-10-01

146

Observation of positional relation between mandibular third molars and the mandibular canal on limited cone beam computed tomography  

International Nuclear Information System (INIS)

We describe the preoperative use of limited cone beam computed tomography (CT) with a dental CT scanner for the assessment of mandibular third molars before extraction. Cone beam CT provides 42.7-mm-high and 30-mm-wide rectangular solid images, with a resolution of less than 0.2 mm. The positional relationship between the mandibular third molars and the mandibular canal was examined by dental CT. Sixty-eight lower third molars of 62 patients whose teeth were superimposed on the mandibular canal on periapical or panoramic radiographs were studied. Dental CT scans clearly demonstrated the positional relationship between the mandibular canal and the teeth. The mandibular canal was located buccally to the roots of 16 teeth, lingually to the roots of 27 teeth, inferiorly to the roots of 23 teeth, and between the roots of 2 teeth. The presence of bone between the mandibular canal and the teeth was not noted in 7 of 16 buccal cases, 24 of 27 lingual cases, and 10 of 23 inferior cases on dental CT scans, suggesting that the canal was in contact with the teeth. Fifty-nine of the 68 mandibular third molars were surgically removed, and postoperative transient hypoesthesia occurred in 4 patients. Dental CT scans showed no bone between the mandibular canal and the teeth in all 4 patients. Hypoesthesia was not related to the bucco-lingual location of the mandibular canal or to the extent of bone loss between the canal and the teeth. However, hypoesthesia did not occur in patients with bone between the mandibular canal and the teeth. Thus, information on the distance between the canal and teeth on dental CT scans was useful for predicting the risk of inferior alveolar nerve damage. Because of its high resolution and low radiation dose, cone beam CT was useful for examination before mandibular third molar surgery. (author)

2004-01-01

147

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

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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.

Ivan Tadeu Pinheiro da, Silva.

148

Radiographic study of mandibular third molars  

Energy Technology Data Exchange (ETDEWEB)

The author performed radiographical analysis of the third molar dentition and characteristic relation to anatomical oral structure. For this purpose 506 orthopantomagraph film, male 283 cases and female 223 cases, aged form 15 to 30 years were evaluated by means of Winter's classification in conjunction with some other methods. Through the study following result were obtained: 1. The eruption of 8888 were found in 229 cases followed by 61 cases of 88 and 45 cases showed no evidence of eruption. 2. The classification based on the relation of ramus to distal portion of the 2nd molar revealed class II, 460 cases (61.8%) and 182 cases (24.5%) were class III. 3. Parallelism between long axis of mandibular third molar and the second molar were found in 302 cases (40.8%) and mesial inclination of the third molar were 280 cases (37.6%). 4. Average inclination degree among these cases showed 138.62{+-} 12.56 degrees.

Ahn, Hyung Kyu [Dept. of Oral Radiology, College of Dentistry Seoul National University, Seoul (Korea, Republic of)

1986-11-15

149

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  

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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.

Samar Fatemi

2013-06-01

150

Agenesia of the vena cava inferior  

International Nuclear Information System (INIS)

A case of agenesia of 3 of the 4 segments of the vena cava inferior is presented. The embryogenesis of the v. cava inferior is discussed in so far as is relevant for the malformation in this case. Exact diagnosis and classification can be made via intravenous and intraarterial DSA and computed tomography. (orig.)

1986-01-01

151

High obstruction of inferior vena cava  

International Nuclear Information System (INIS)

Two cases with high obstruction of the inferior vena cava are reported. In one case the obstruction was caused by a metastasis from colonic carcinoma and in the other case the obstruction was supposed to be congenital. The angiographic and phlebographic findings are discussed as well as the flow pattern that will suggest such a high obstruction of the inferior vena cava. (orig.)

1983-01-01

152

Inferior vena caval masses identified by echocardiography  

Science.gov (United States)

The most common cause of an inferior vena caval mass is renal cell carcinoma that extends through the lumen, occurring in 47 of 62 patients (85%). Detection of an inferior vena caval mass affects the surgical approach requiring cardiopulmonary bypass for resection when the mass extends to the heart.

Sun, J. P.; Asher, C. R.; Xu, Y.; Huang, V.; Griffin, B. P.; Stewart, W. J.; Novick, A. C.; Thomas, J. D.

1999-01-01

153

High obstruction of inferior vena cava  

Energy Technology Data Exchange (ETDEWEB)

Two cases with high obstruction of the inferior vena cava are reported. In one case the obstruction was caused by a metastasis from colonic carcinoma and in the other case the obstruction was supposed to be congenital. The angiographic and phlebographic findings are discussed as well as the flow pattern that will suggest such a high obstruction of the inferior vena cava.

Duarte, V.; Lunderquist, A.

1983-02-01

154

Molar heat capacity and molar excess enthalpy measurements in aqueous amine solutions  

Science.gov (United States)

Experimental measurements of molar heat capacity and molar excess enthalpy for 1, 4-dimethyl piperazine (1, 4-DMPZ), 1-(2-hydroxyethyl) piperazine (1, 2-HEPZ), I-methyl piperazine (1-MPZ), 3-morpholinopropyl amine (3-MOPA), and 4-(2-hydroxy ethyl) morpholine (4, 2-HEMO) aqueous solutions were carried out in a C80 heat flow calorimeter over a range of temperatures from (298.15 to 353.15) K and for the entire range of the mole fractions. The estimated uncertainty in the measured values of the molar heat capacity and molar excess enthalpy was found to be +/- 2%. Among the five amines studied, 3-MOPA had the highest values of the molar heat capacity and 1-MPZ the lowest. Values of molar heat capacities of amines were dominated by --CH 2, --N, --OH, --O, --NH2 groups and increased with increasing temperature, and contributions of --NH and --CH 3 groups decreased with increasing temperature for these cyclic amines. Molar excess heat capacities were calculated from the measured molar heat capacities and were correlated as a function of the mole fractions employing the Redlich-Kister equation. The molar excess enthalpy values were also correlated as a function of the mole fractions employing the Redlich-Kister equation. Molar enthalpies at infinite dilution were derived. Molar excess enthalpy values were modeled using the solution theory models: NRTL (Non Random Two Liquid) and UNIQUAC (UNIversal QUAsi Chemical) and the modified UNIFAC (UNIversal quasi chemical Functional group Activity Coefficients - Dortmund). The modified UNIFAC was found to be the most accurate and reliable model for the representation and prediction of the molar excess enthalpy values. Among the five amines, the 1-MPZ + water system exhibited the highest values of molar excess enthalpy on the negative side. This study confirmed the conclusion made by Maham et al. (71) that -CH3 group contributed to higher molar excess enthalpies. The negative excess enthalpies were reduced due to the contribution of --O and --OH groups in 3-MOPA; 1, 2-HEPZ and 4, 2-HEMO. Conclusions made by Maham et al. (71 ) stating that the interaction between water (--OH group) and diethylamine (--NH group) was more dominant than the interactions between --OH groups from water and alcohol molecules were supported by this study for cyclic amines.

Poozesh, Saeed

155

Pneumatization of bilateral inferior turbinates: case report  

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Full Text Available Nasal turbinates are very important for normal nasal functions. Warming, humidification, filtration and regulation of air ?ow 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.

Fatih Akagün

2013-01-01

156

Diagnosis and treatment of molar incisor hypomineralization.  

Science.gov (United States)

Molar incisor hypomineralization (MIH) is a relatively common condition that varies in clinical severity and can result in early loss of the permanent 6-year molars. The etiology of MIH remains unclear, and the diagnosis can be confused with more generalized enamel defects such as those that occur in amelogenesis imperfecta. The management of MIH depends largely on the severity of the enamel defect. Degrees of hypomineralization can range from mild enamel opacities to enamel that readily abrades from the tooth as it emerges into the oral cavity. Usually, severely affected molars are extremely hypersensitive, prone to rapid caries development, and can be difficult to manage in young patients. The purpose of this article is to review approaches to diagnosing and treating MIH. PMID:17133930

Mathu-Muju, Kavita; Wright, J Timothy

2006-11-01

157

Leiomyosarcoma of inferior vena cava.  

Science.gov (United States)

Malignancy arising from the blood vessels is a very rare finding in daily clinical practice. In addition, the finding can often be misdiagnosed and ill-treated. These tumors usually go unnoticed unless it has metastasized to distant tissues. Among these rare tumors, leiomyosarcoma is the most common. It mostly arises in the inferior vena cava (IVC). Clinical signs and symptoms are very vague. Usually it is often misdiagnosed as an abscess cavity in the liver or primary hepatic malignancy (when present at level II) or as a thrombus in the IVC. Radiological investigations are the key to proper diagnosis. Depending upon the exact location, further treatment options vary. Generally, it is believed that level II and level III tumors are amenable to surgery followed by chemo or radiotherapy. We present a rare case of leiomyosarcoma of IVC at level II being diagnosed with proper radiological investigations and its management with further stress on offering chemo-radiotherapy after its surgical removal as compared to only surgery performed earlier. This case report will throw some light on the proper management of such rare tumors in terms of their exact diagnosis and treatment in order to prolong patient survival. PMID:22120864

Jadhav, S A; Atluri, V S; Prajapati, R; Satoskar, R R

2011-01-01

158

Complex odontoma associated with an impacted molar  

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Full Text Available Odontomas are the most common odontogenic tumors. They are usually asymptomatic and could be detected accidentally after an X-ray examination of the jaw. The most frequent location of odontomas is maxillary front. The case reported here is a complex odontoma found in the left mandible, associated with an impacted third molar of a 14-year-old girl. Under local anesthesia, both the impacted third molar and odontoma were surgically extracted. Histopathological examination confirmed the diagnosis of complex odontoma.

Stojanovi? Dragana

2007-01-01

159

Forced extrusion for removal of impacted third molars close to the mandibular canal Extrusión forzada para extraer los terceros molares impactados cerca del canal mandibular  

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Full Text Available Impacted mandibular third molars can be located in close proximity to the mandibular canal. This creates a risk for the nerve or artery injury. These are contained in the canal. However, the impacted third molar can be moved coronally by orthodontic means, after removal of overlying bone, and safely extracted. The orthodontic intervention slowly moves the tooth apex away from the mandibular canal and reduces the potential for a neural injury. This method may be useful for older patients with root apices that approximate or are actually located in the mandibular canal. This technique needs further study. There is a theoretical potential for neural or arterial injury from physical contact of the tooth apex as it moves by or through the mandibular canal.Los terceros molares inferiores impactados pueden localizarse muy cerca del canal mandibular. Esto constituye un riesgo de lesión del nervio o la arteria, que se localizan dentro del canal. No obstante, el tercer molar impactado puede desplazarse en dirección coronal con ortodoncia, tras ostectomía del hueso suprayacente, y extraerse sin riesgos. La intervención ortodóncica desplaza lentamente el ápice del diente fuera del canal mandibular y reduce la posibilidad de lesión neural. Este método puede ser útil para pacientes de edad avanzada con ápices dentales que se aproximan o en realidad se localizan en el canal mandibular. La técnica necesita un estudio adicional. Hay la posibilidad teórica de lesión neural o arterial a partir del contacto físico del ápice del diente a medida que se desplaza a través del canal mandibular.

Dennis Flanagan DDS

2012-03-01

160

Forced extrusion for removal of impacted third molars close to the mandibular canal / Extrusión forzada para extraer los terceros molares impactados cerca del canal mandibular  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: English Abstract in spanish Los terceros molares inferiores impactados pueden localizarse muy cerca del canal mandibular. Esto constituye un riesgo de lesión del nervio o la arteria, que se localizan dentro del canal. No obstante, el tercer molar impactado puede desplazarse en dirección coronal con ortodoncia, tras ostectomía [...] del hueso suprayacente, y extraerse sin riesgos. La intervención ortodóncica desplaza lentamente el ápice del diente fuera del canal mandibular y reduce la posibilidad de lesión neural. Este método puede ser útil para pacientes de edad avanzada con ápices dentales que se aproximan o en realidad se localizan en el canal mandibular. La técnica necesita un estudio adicional. Hay la posibilidad teórica de lesión neural o arterial a partir del contacto físico del ápice del diente a medida que se desplaza a través del canal mandibular. Abstract in english Impacted mandibular third molars can be located in close proximity to the mandibular canal. This creates a risk for the nerve or artery injury. These are contained in the canal. However, the impacted third molar can be moved coronally by orthodontic means, after removal of overlying bone, and safely [...] extracted. The orthodontic intervention slowly moves the tooth apex away from the mandibular canal and reduces the potential for a neural injury. This method may be useful for older patients with root apices that approximate or are actually located in the mandibular canal. This technique needs further study. There is a theoretical potential for neural or arterial injury from physical contact of the tooth apex as it moves by or through the mandibular canal.

Dennis, Flanagan DDS.

 
 
 
 
161

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

DEFF Research Database (Denmark)

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.

Hillerup, Søren

2008-01-01

162

Anomalies of the vena cava inferior  

International Nuclear Information System (INIS)

Two cases of anomalous inferior vena cava are presented, with the emphasis on embryology. The firts patient was investigated by venography for a clinically proven varicocele as a probable cause of infertility. A double inferior vena cava was found during venography, and was confirmed by computed tomography (CT). In the second case a left-sided inferior vena cava was an incidental finding when a CT scan was done as a diagnostic procedure in a case of Hodgkin's disease. A short summary of the embryology and the significance of the variants is presented

1986-01-04

163

Anesthetic Efficacy of Lidocaine/Meperidine for Inferior Alveolar Nerve Blocks  

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The authors, using a crossover design, randomly administered, in a single-blind manner, inferior alveolar nerve blocks using 36 mg of lidocaine with 18 ?g of epinephrine or a combination of 36 mg of lidocaine with 18 ?g epinephrine plus 36 mg meperidine with 18 ?g of epinephrine, at 2 separate appointments, to 52 subjects. An electric pulp tester was used to test for anesthesia, in 4-minute cycles for 60 minutes, of the molars, premolars, and central and lateral incisors. Anesthesia was co...

2006-01-01

164

Efficacy of low level laser therapy on neurosensory recovery after injury to the inferior alveolar nerve  

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Full Text Available Abstract Background The most severe complication after the removal of mandibular third molars is injury to the inferior alveolar nerve or the lingual nerve. These complications are rather uncommon (0.4% to 8.4% and most of them are transient. However, some of them persist for longer than 6 months, which can leave various degrees of long-term permanent disability. While several methods such as pharmacologic therapy, microneurosurgery, autogenous and alloplastic grafting can be used for the treatment of long-standing sensory aberrations in the inferior alveolar nerve, there are few reports regarding low level laser treatment. This paper reports the effects of low level laser therapy in 4 patients with longstanding sensory nerve impairment following mandibular third molar surgery. Methods Four female patients had complaints of paresthesia and dysesthesia of the lip, chin and gingiva, and buccal regions. Each patient had undergone mandibular third molar surgery at least 1 year before. All patients were treated with low level laser therapy. Clinical neurosensory tests (the brush stroke directional discrimination test, 2-point discrimination test, and a subjective assessment of neurosensory function using a visual analog scale were used before and after treatment, and the responses were plotted over time. Results When the neurosensory assessment scores after treatment with LLL therapy were compared with the baseline values prior to treatment, there was a significant acceleration in the time course, as well as in the magnitude, of neurosensory return. The VAS analysis revealed progressive improvement over time. Conclusion Low level laser therapy seemed to be conducive to the reduction of long-standing sensory nerve impairment following third molar surgery. Further studies are worthwhile regarding the clinical application of this treatment modality.

Gorur Ilker

2006-02-01

165

An incidental finding of the accessory inferior thyroid artery  

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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...

2008-01-01

166

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish 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 aconsej [...] able 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. Abstract in english 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.

Recio Lora, C.; Torres Lagares, D.; Maeztu Martínez, M. de; Romero Ruiz, M.M.; Gutiérrez Pérez, J.L..

167

Comportamiento fenológico y producción de frutos de algunas especies leñosas del bosque deciduo en el asentamiento Las Peñitas, al sur del estado Aragua / Phenological performance and fruit production of some tree species of a deciduous tropical forest at “Las Peñitas” rural development, south of Aragua state  

Scientific Electronic Library Online (English)

Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish Con el objeto de identificar botánicamente y caracterizar el comportamiento fenológico de algunas especies leñosas presentes en un bosque deciduo, así como medir la producción de frutos caídos al suelo en 4 especies de leguminosas, se realizaron colectas de muestras para su identificación y se lleva [...] ron observaciones de campo en forma mensual durante todo un año cronológico. Se midió también la producción total de los frutos caídos al suelo en las 4 leguminosas más importantes de la zona. Se encontraron 32 especies botánicas diferentes, predominando la familia Leuminoseae (37%), estando el resto de las especies (63%) distribuidas en 14 familias diferentes Se encontraron solo 4 especies perennifolias (Talissia olivaeformis, Acacia articulata, Caparis fexuosa y Lecythys ollaria) con periodos de floración variable entre los meses de diciembre a agosto. Hubo 12 especies con períodos de floración en la época lluviosa, 6 especies con presencia de hojas durante 6 meses o más y 6 especies con presencia de follaje menos de 6 meses, con el proceso de caducifolia muy marcado. Así mismo, 9 especies mostraron floración en la época seca. La especie Acacia macracanta mostró la mayor producción de frutos (11,8 kg/planta). El bosque deciduo evaluado mostró una gran variabilidad en cuanto a la época de ocurrencia de los distintos eventos fenológicos y una producción de frutos importantes, que pueden ser consumidos por los rumiantes en diversas épocas del año. Abstract in english With the aim to identify botanically and to characterize the phenological performance of some tree species of a deciduous tropical forest, and to measure the fruit production in four legume species, there were made monthly observations and collection of samples for its identification during a whole [...] year. There were found 32 species. The Leuminoseae family was predominant (37%) and the rest of the species were distributed in 14 families. Only four perennial leaves species were found (Talissia olivaeformis, Acacia articulata, Caparis fexuosa and Lecythys ollaria) with flowering period from December to August. There were 12 species with the flowering period during the rainy season. Six species had leaves during 6 months or more and 6 species were without leaves for less than 6 months. Also, it was found 9 species flowering during the dry season. The specie Acacia macrocanta had the highest fruit production (11.8 kg/plant). The deciduous forest has an important production of fruits that could be eaten by the ruminants during different seasons.

José, Valero; Miguel, Benezra; Luis, Chong; Orlando, Guenni.

168

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available ... artery, so usually in that setting, we'll proceed as planned with the deep inferior epigastric perforator ... just beginning to see it. Well, as we proceed with the dissection, we'll come up to ...

169

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available BREAST RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 ... breast cancer. You will also see the breast reconstruction surgery each of them chose to undergo. The ...

170

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available ... an in-depth look at nipple areolar-sparing mastectomy and immediate reconstruction using the deep inferior epigastric ... re also going to discuss nipple areolar-sparing mastectomy, and with us today is Dr. Sheldon Feldman, ...

171

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available BREAST RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 WOMAN 1: The diagnosis of breast cancer is shocking for anybody and everybody. It's ...

172

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available ... the deep inferior epigastric perforator technique. 00:18:40 WILLIAM SAMSON, MD: As you move along with ... cancer. I'm sorry, I did -- 00:26:40 WILLIAM SAMSON, MD: It's okay. Before we go ...

173

Breast Reconstruction: Deep Inferior Epigastric Perforator  

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Full Text Available BREAST RECONSTRUCTION: DEEP INFERIOR EPIGASTRIC PROCEDURE BETH ISRAEL MEDICAL CENTER NEW YORK, NY January 11, 2008 00:00:24 WOMAN 1: The diagnosis of breast cancer is shocking for anybody and ...

174

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 ...

175

Breast Reconstruction: Deep Inferior Epigastric Perforator  

Medline Plus

Full Text Available ... which is the deep inferior epigastric artery and vein, comes up from underneath the muscle and perforates ... if present, may be very small. So the veins are usually present. And here we've seen ...

176

An incidental finding of the accessory inferior thyroid artery  

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Full Text Available 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 accessory vessels of thyroid gland are present in about 5% of cases, the accessory inferior thyroid artery, emerging from subclavian artery and located above the normal inferior thyroid artery, is very rare.

Sedy J

2008-07-01

177

[Inferior vestibular neuritis: diagnosis using VEMP].  

Science.gov (United States)

Vestibular evoked myogenic potentials (VEMP) are a new method to establish the functional status of the otolith organs. The sacculocollic reflex of the cervical VEMP to air conduction (AC) reflects predominantly saccular function due to saccular afferents to the inferior vestibular nerve. We describe a case of inferior vestibular neuritis as a rare differential diagnosis of vestibular neuritis. Clinical signs were a normal caloric response, unilaterally absent AC cVEMPs and bilaterally preserved ocular VEMPs (AC oVEMPs). PMID:22037927

Walther, L E; Repik, I

2012-02-01

178

The inferior frontal gyrus and cough  

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Full Text Available We present a case of a patient with a tumor close to the right inferior frontal gyrus. The only symptom this patient had was a disturbing dry cough. After removal of the tumor the cough disappeared immediately. Review of the literature showed that there is a control center of voluntary cough in the right inferior frontal gyrus. Our case suggests that there might be such a center, which can be affected by a tumor close to it.

Homajoun Maslehaty

2014-03-01

179

Sarcoma of the vena cava inferior  

International Nuclear Information System (INIS)

Authors present an infrequent case of a female patient with abdominal tumor a great superficial collateral circulation type cava-cava, the abdominal ultrasound, the transthoracic and transesophageal echocardiogram and the computerized axial tomography (CAT) identified a tumor of the vena cava inferior. The fine-needle aspiration cytology of lesion confirmed the presence of primary fusopleomorphous sarcoma of high degree of malignancy of vena cava inferior

2010-01-01

180

Actitud terapéutica ante sacos foliculares de terceros molares incluídos Therapeutic approach to impacted third molar follicles  

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Full Text Available El quiste dentígero o folicular es un quiste odontogénico del desarrollo. Está revestido por el epitelio del folículo dentario, y suele estar en relación con un diente permanente incluído. Presentamos el caso clínico de un paciente en el que se observa la aparición de un quiste dentígero a partir del saco folicular de un tercer molar incluído no exodonciado, y lo comparamos con la evolución de un cordal incluído y su saco folicular contralaterales en los que se realizó la exodoncia. El tratamiento definitivo del quiste dentígero asociado a un tercer molar incluído es quirúrgico, con la exodoncia de la pieza y enucleación del quiste. Los sacos foliculares mayores de 2 mm asociados a terceros molares incluídos evolucionan en numerosas ocasiones a quistes foliculares. Está indicada la exodoncia de dichos cordales para evitar la evolución a quiste dentígero.The dentigerous cyst or follicular cyst is a developmental odontogenic cyst. It is covered by the epithelium of the dental follicle, and it tends to be related to an impacted permanent tooth. The case report of a patient who was seen to develop a dentigerous cyst arising from the follicle of an impacted non-extracted third molar is presented. This is then compared with the evolution of the contralateral impacted third molar and its follicle that was extracted. The definitive treatment for a dentigerous cyst associated with an impacted third molar is surgical, the extraction of the tooth and enucleation of the cyst. Follicles measuring more+ than 2 mm and that are associated with impacted third molars often develop into follicular cysts. The extraction of these third molars is indicated in order to avoid the development of a dentigerous cyst

R. González García

2005-04-01

 
 
 
 
181

Actitud terapéutica ante sacos foliculares de terceros molares incluídos / Therapeutic approach to impacted third molar follicles  

Scientific Electronic Library Online (English)

Full Text Available SciELO Spain | Language: Spanish Abstract in spanish El quiste dentígero o folicular es un quiste odontogénico del desarrollo. Está revestido por el epitelio del folículo dentario, y suele estar en relación con un diente permanente incluído. Presentamos el caso clínico de un paciente en el que se observa la aparición de un quiste dentígero a partir de [...] l saco folicular de un tercer molar incluído no exodonciado, y lo comparamos con la evolución de un cordal incluído y su saco folicular contralaterales en los que se realizó la exodoncia. El tratamiento definitivo del quiste dentígero asociado a un tercer molar incluído es quirúrgico, con la exodoncia de la pieza y enucleación del quiste. Los sacos foliculares mayores de 2 mm asociados a terceros molares incluídos evolucionan en numerosas ocasiones a quistes foliculares. Está indicada la exodoncia de dichos cordales para evitar la evolución a quiste dentígero. Abstract in english The dentigerous cyst or follicular cyst is a developmental odontogenic cyst. It is covered by the epithelium of the dental follicle, and it tends to be related to an impacted permanent tooth. The case report of a patient who was seen to develop a dentigerous cyst arising from the follicle of an impa [...] cted non-extracted third molar is presented. This is then compared with the evolution of the contralateral impacted third molar and its follicle that was extracted. The definitive treatment for a dentigerous cyst associated with an impacted third molar is surgical, the extraction of the tooth and enucleation of the cyst. Follicles measuring more+ than 2 mm and that are associated with impacted third molars often develop into follicular cysts. The extraction of these third molars is indicated in order to avoid the development of a dentigerous cyst

González García, R.; Escorial Hernández, V.; Capote Moreno, A.; Martos Díaz, P.L.; Sastre Pérez, J.; Rodríguez Campo, F.J..

182

Assessment of the relationship between the mandibular third molar and the mandibular canal using panoramic radiograph and cone beam computed tomography  

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The purpose of this study is to evaluate the position of the mandibular canal in relation to the mandibular third molar by cone beam CT in cases showing a close relationship between the third molar and the mandibular canal on the panoramic radiograph. The panoramic images and cone beam CT scans of 87 impacted mandibular third molars in 60 patients were evaluated to assess the tooth relationship to the mandibular canal. The clearness of the canal wall and the vertical depth of the lower third molar were evaluated on panoramic radiographs. The lower third molars were assessed using cone beam CT to determine the proximity and position of the canal relative to the roots. In the 66 cases where the canal wall was unclear on the panoramic radiographs, 58 (87.9%) of the third molars had contact between the canal and root; 34 (51.5%) canals were showed an inferior position and 22 (33.3%) showed a linguoinferior position on cone beam CT. Interruption of the canal wall on panoramic radiographs was highly predictive of contact between the mandibular canal and the third molar. Cross sectional CT may be indicated for localization of the mandibular canal in such cases.

Jung, Yun Hoa; Nah, Kyung Soo; Cho, Bong Hae [Department of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University, Pusan (Korea, Republic of)

2008-09-15

183

Assessment of the relationship between the mandibular third molar and the mandibular canal using panoramic radiograph and cone beam computed tomography  

International Nuclear Information System (INIS)

The purpose of this study is to evaluate the position of the mandibular canal in relation to the mandibular third molar by cone beam CT in cases showing a close relationship between the third molar and the mandibular canal on the panoramic radiograph. The panoramic images and cone beam CT scans of 87 impacted mandibular third molars in 60 patients were evaluated to assess the tooth relationship to the mandibular canal. The clearness of the canal wall and the vertical depth of the lower third molar were evaluated on panoramic radiographs. The lower third molars were assessed using cone beam CT to determine the proximity and position of the canal relative to the roots. In the 66 cases where the canal wall was unclear on the panoramic radiographs, 58 (87.9%) of the third molars had contact between the canal and root; 34 (51.5%) canals were showed an inferior position and 22 (33.3%) showed a linguoinferior position on cone beam CT. Interruption of the canal wall on panoramic radiographs was highly predictive of contact between the mandibular canal and the third molar. Cross sectional CT may be indicated for localization of the mandibular canal in such cases.

2008-09-01

184

Cell ploidy in molar placental disease.  

Science.gov (United States)

Molar diseases of the placenta is associated with cystic change in the villi. The cysts may be from 5-20+ mm in diameter. This disease has been described in association with triploid and diploid cell lines and with and without an accompanying embryo or fetus. It may be followed by malignant change and invasive chorio-carcinoma. In order to investigate the association between cell ploidy, embryonic development and subsequent malignancy, a detailed study of 30 conceptuses with molar disease was made, with the accompanying maternal history and follow-up. The cell ploidy was determined by measurement of nuclei by a cytoscan light microscope connected to a computer program as has been previously described. Diploid cell lines were not found with embryonic or fetal development. Triploid cell lines were always associated with an embryo or fetus. Triploidy is not associated with hyperplastic changes in the trophoblast. These results are presented and discussed. PMID:715729

Poland, B J; Baillie, D L

1978-10-01

185

Association between Peritonsillar Abscess and Molar Caries  

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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...

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

2006-01-01

186

Dens in dente of maxillary third molar  

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Full Text Available ?Dens in dente,? also known as dens invaginatus, is a developmental anomaly resulting from deepening or invagination of the enamel organ into the dental papilla, which begins at the crown and often extends to the root before calcification of the dental tissues. Dens in dente commonly occur in the maxillary lateral incisor. This article reports a case of dens in dente in the maxillary third molar.

Subramaniam Arun

2008-01-01

187

A simplified approach to true molar intrusion  

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Abstract Background Orthodontic management of anterior open bites is a demanding task for orthodontists. Molar intrusion as a primary means of open bite correction entails the need for appropriate anchorage. Orthodontic mini implants can provide the required mechanical support. The suggested procedure aims to reduce the risk of complications such as root damage or soft tissue irritations while minimizing overall complexity. Methods Three female patients aged 14,...

Flieger Stefanie; Ziebura Thomas; Kleinheinz Johannes; Wiechmann Dirk

2012-01-01

188

Ectopic third molar in the maxillary sinus  

Science.gov (United States)

Ectopic eruption of teeth into a region other than the oral cavity is rare although there have been reports of teeth in the nasal septum, mandibular condyle, coronoid process, palate, chin and maxillary sinus. Occasionally, a tooth may erupt in the maxillary sinus and present with local sinonasal symptoms attributed to chronic sinusitis. We present a case of an ectopic maxillary third molar tooth that caused chronic purulent sinusitis in relation to the right maxillary sinus.

Mohan, Shishir; Kankariya, Hasti; Harjani, Bhupendra; Sharma, Harendra

2011-01-01

189

Aetiological factors of molar incisor hypomineralization  

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Full Text Available Introduction. Teeth hypomineralization that involves molars only, or molars and incisors is known as disease Molar Incisor Hypomineralization (MIH. Aetiology of MIH is not known, however, factors responsible for this disease are present in the first year of life. The aim of this research was to identify possible aetiological factors responsible for the occurrence of this disease. Material and Methods. The study included eight years old children from the municipality of Foca. Parents who gave their consent for the participation of children in the study completed a questionnaire in which they listed aetiological factors described in the literature to be responsible for the emergence of hypomineralization. Modified DDE index (Modified DDE Index for Use in Epidemiological Surveys was used to estimate hypomineralization on all teeth; however, MIH changes were classified separately. Results. More than ninety different factors may be responsible for enamel defects. Possible aetiological factors listed in the literature are: premature birth, low weight of newborns, hypoxia, metabolic disorder of calcium and phosphate, fever, genetic factors, etc. Results did not confirm statistical significance for any of examined aetiological factors. Conclusion. In this study a retrospective analysis of data was performed. Etiological factors of MIH were identified but the most responsible for MIH were not determined.

Jankovi? Svjetlana

2013-01-01

190

[Complications during and after third molar extraction].  

Science.gov (United States)

A retrospective analysis of intra- and postoperative complications with special regard to infections should give information about the success rate of our antiseptic treatment procedure when removing third molars. 3,980 third molars were surgically removed between July 1, 1992 and June 30, 1999. Dates were sampled from the patient medical histories (963 men, 935 women) and statistically analyzed. Intraoral complications arose in 188 cases: 153 perforations (3.8%) of the maxillary sinus and additional 35 complications (0.9%) arose from ruptured tuber maxillae, intraoperative bleedings, dislocations of teeth into the maxillary sinus and primary not removable root fragments. In 159 cases there were postoperative complications: 102 common simple infections were mainly respresented (2.6%). Persistent oroantral fistulae, odontogenous sinusitis, sensitivity disturbances, mandibular fractures, after-bleedings and osteomyelitis had to be treated postoperatively in 1.4%. Further a significant correlation between smoking and pericoronal infection (p = 0.0001 regio 38 / p = 0.012 regio 48) was identifiable. Based on our results we recommend to remove third molars for prophylactic reasons before the age of 25 because the intra- and postoperative complications will rise significantly afterwards. PMID:15646673

Arrigoni, Jeannine; Lambrecht, J Thomas

2004-01-01

191

Etiological factors in second mandibular molar impaction  

Science.gov (United States)

Objectives: The impaction of the second mandibular molar (MM2) has recently become more prevalent. Several etiological hypothesis have been proposed to investigate the association between skeletal features and impaction of MM2. The aims of this study were to analyze the skeletal features in patients with MM2 impaction and the association between arrested eruption of MM2 and the presence of the third mandibular molar (MM3). Study Design: In this retrospective study 48 subjects from 3,530 Caucasian orthodontic patients with MM2 impaction were included in a study group (SG) and compared to a control group (CG) of 200 subjects without MM2 impaction. Panoramic radiographs evaluated the presence or absence of the MM3 germ. Cephalometric analysis was performed to evaluate linear and angular skeletal values. For the statistical analysis, descriptive statistics, Student’s t-test, ?2 test and odds ratio (OR) were used. Results: The paired comparisons between SG and CG showed in cephalometric analysis both a reduced mandibular gonial angle (ArGoMe) and lowered Jarabak’s polygon value with a statistically significant difference (P? 0.05). MM3 was statistically significant associated (P? 0.05) with MM2 impaction but it is not a risk factor (OR 0.817). Conclusions: Subjects with MM2 impaction show a vertical condylar growth direction. MM3 is not a risk factor for MM2 impaction. Key words:Impacted mandibular second molar, skeletal features, orthodontic.

Altieri, Federica; Calasso, Sabrina

2014-01-01

192

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish 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

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

193

Analysis of accidents and complications in surgical removal of impacted mandibular third molars occurred in Curitiba/PR  

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Full Text Available The dental retention, mainly of the third molar ones, is presented as a problem of relevant frequency that reaches individuals of all the social classes. In statistical terms, the highest volume of these inclusions is for account of the third molar ones, being the inferiors in higher incidence than the superiors. Accidents and/or complications are inherent to any buccal surgical act. In view of this importance, the objective of this work was to analyze the accidents and complications in surgeries of restrained inferior third molars through questionnaire directed to the specialists inSurgery and Bucomaxilofacial Traumatology. In this study 28 dentalsurgeons, whose average time of specialist in Surgery and Bucomaxilofacial Traumatology was of 15,1 years, with shunting line standard of 11,8 years have been enclosed. The medium time was of 14,5 years, the shortest time of observed specialist was of 1 year and the longest was of 47 years.Considering that the time as specialist presented great dispersion among the searched ones, the results gotten in the study in relation to the several questions of the questionnaire have been analyzed for the number of cases per year. The gotten results have been 61% of injuries of the inferioralveolar nerve, 54% of transoperation hemorrhage and 50% of injuries of the lingual nerve. It is concluded with the present study that the number of accidents and complications is low and getting even lower when the time of the dental surgeon in the specialty grows.

Fabiano Geronasso SIMÕES

2005-11-01

194

Treatment options for hypomineralized first permanent molars and incisors  

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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 complica...

2006-01-01

195

Acute inflammation at a mandibular solitary horizontal incompletely impacted molar  

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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 fir...

2009-01-01

196

Skeletal stability after inferior maxillary repositioning without interpositional graft.  

Science.gov (United States)

True vertical maxillary deficiency is a characteristic of short face syndrome. In these patients, inferior repositioning of the maxilla (IRM) is indicated to improve facial aesthetics and function, but this procedure has been described as the most unstable. The aim of this study was to evaluate the long term, post surgical stability of IRM, fixed with four 2.0mm L-shaped miniplates, without any type of graft. A cephalometric study was performed, analysing linear measurements (anterior nasal spine, the A point, top of the incisor, top of the buccal-mesial cusp of the first molar, and posterior nasal spine on an X-Y coordinate system) traced immediately preoperatively, immediately postoperatively and at least 6 months post operatively. Eight young adult patients who underwent IRM were studied. The average results of this study were: surgical movement of 4.65 mm at I point, 5.32 mm at anterior nasal spine (ANS) point, and 4.70 mm at A point and relapses of 1.60 mm (35%), 2.23 mm (43%) and 2.10 mm (46%), respectively. It was concluded, that IRM using this type of internal rigid fixation without graft is unstable. PMID:22192387

Santos, S E; Moreira, R W F; de Moraes, M; Asprino, L; Araujo, M M

2012-04-01

197

Inferior vena cava tumors - diagnostic difficulties  

International Nuclear Information System (INIS)

We present a patient with a diagnosis of tumor within the vena cava inferior, which was detected during screening abdominal ultrasound examination. Repeated abdominal ultrasound examination, CT and MRI were performed in order to make diagnosis more precise. Imaging revealed the tumor within the lumen of dilated inferior vena cava, which was significantly obstructed by tumor masses. Final diagnosis was made on the basis of postoperative histopathological and immunohistochemical findings, which confirmed the renal cell carcinoma within the inferior vena cava, without any delectable lesion in kidneys. Despite imaging of retroperitoneal tumors allows accurate assessment of morphology and extent of tumor masses, it is often required to perform surgery and histopathological examination to state the final diagnosis. (authors)

2008-01-01

198

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%.

1982-11-01

199

Bilateral lower second molar impaction in teenagers: an emergent problem?  

Science.gov (United States)

The frequency of simultaneously impacted second and third molars in teenagers is increasing and becoming a common occurrence in adolescent oral surgery practice. The traditional treatment is the removal of the third molar by conventional access but repositioning of the surgical flap to the distal face of the first molar can predispose to complications such as pericoronitis and delayed healing of the attached gingiva. We present a case in which we use the germectomy approach to remove the impacted third molar for the eruption of the second molar through a vestibular incision. This incision offers excellent bone exposure and exit route for the third molar without disturbing the gingiva attached architecture on the distal face of the first molar providing good healing environment. PMID:20657108

Shinohara, Elio H; Kaba, Shajadi Carlos Pardo; Pedron, Irineu Gregnanin; Imparato, Jose Carlos Petorossi

2010-01-01

200

Bilateral lower second molar impaction in teenagers: An emergent problem?  

Directory of Open Access Journals (Sweden)

Full Text Available The frequency of simultaneously impacted second and third molars in teenagers is increasing and becoming a common occurrence in adolescent oral surgery practice. The traditional treatment is the removal of the third molar by conventional access but repositioning of the surgical flap to the distal face of the first molar can predispose to complications such as pericoronitis and delayed healing of the attached gingiva. We present a case in which we use the germectomy approach to remove the impacted third molar for the eruption of the second molar through a vestibular incision. This incision offers excellent bone exposure and exit route for the third molar without disturbing the gingiva attached architecture on the distal face of the first molar providing good healing environment.

Shinohara Elio

2010-01-01

 
 
 
 
201

Efecto de la melatonina aplicada localmente en el interior de alveolos post-extracción de terceros molares retenidos.Estudio piloto  

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La inflamación y el dolor son problemas frecuentes que sufre el paciente y a los que debe hacer frente el profesional tras la realización de tratamientos quirúrgicos. Por otra parte la ausencia de densidad ósea suficiente es la principal limitación a la hora de realizar tratamientos implantológicos exitosos reduciendo los tiempos de espera. La exodoncia quirúrgica de los terceros molares inferiores retenidos es un modelo característico en el que se produce inflamación y dolor tempran...

2013-01-01

202

Electro-acupuncture efficacy on pain control after mandibular third molar surgery  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese O objetivo desta pesquisa foi verificar a eficácia da aplicação de eletro-acupuntura (EAC) na redução da dor após a exodontia de terceiros molares inferiores inclusos. Foram selecionados 24 pacientes jovens (12 homens e 12 mulheres) com inclusão bilateral de terceiros molares inferiores em posição s [...] imilar. Cada paciente foi submetido aleatoriamente a dois procedimentos cirúrgicos em dias diferentes: em um deles o dente foi extraído com uma sessão pré-operatória (24 h) e uma pós-operatória imediata de EAC enquanto no outro a extração foi feita sem EAC. A EAC foi aplicada em 6 pontos sistêmicos bilaterais e 2 auriculares com um aparelho WQ10D1 utilizando freqüência de 40-60 Hz por 20 min com intensidade ajustada individualmente. A dor foi avaliada desde 2h até 72h pós-operatórias utilizando a escala visual análoga (EVA) de 100 mm e pelo consumo de analgésicos. Os dados foram comparados pelo teste deWilcoxon. Os escores de dor da EVA foram significantemente menores para o tratamento com EAC (p Abstract in english The aim of this study was to evaluate the efficacy of electro-acupuncture (EAC) on postoperative pain control after mandibular third molar surgery. Twenty four young patients (12 male and 12 female) with symmetrically impacted mandibular third molars were selected. Each patient was submitted to two [...] separate surgical procedures under local anesthesia. At one side, extraction was carried out employing both prior (24h) and immediately postoperative application of EAC, while on the contralateral side surgery was carried out without any treatment. EAC was applied on 6 bilateral systemic and 2 auricular points with a WQ10Dl appliance using 40-60Hz frequency for 20 min and individually adjusted intensity. Postoperative pain intensity was rated on a 100 mm visual analog scale (VAS) between 2 and 72 h and recording the amount of analgesics intake after surgery. Statistical analysis was performed using theWilcoxon test. Postoperative pain VAS scores were significantly lower for the EAC group (p

Tavares, Marconi Gonzaga; Machado, Ana Paula; Motta, Breno Gutierrez; Borsatto, Maria Cristina; Rosa, Adalberto Luiz; Xavier, Samuel Porfírio.

203

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  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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. Abstract in english 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.

Juliana Maria, Quaglio; Marcela Bernardes, Sousa; Thiago Machado, Ardenghi; Fausto Medeiros, Mendes; José Carlos Pettorossi, Imparato; Sérgio Luiz, Pinheiro.

204

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  

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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.

Juliana Maria Quaglio

2006-12-01

205

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  

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Full Text Available SciELO Chile | Language: Spanish Abstract in spanish 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.

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

206

Position of the impacted third molar in relation to the mandibular canal. Diagnostic accuracy of cone beam computed tomography compared with panoramic radiography.  

Science.gov (United States)

This study investigated the diagnostic accuracy of cone beam computed tomography (CBCT) compared to panoramic radiography in determining the anatomical position of the impacted third molar in relation with the mandibular canal. The study sample comprised 53 third molars from 40 patients with an increased risk of inferior alveolar nerve (IAN) injury. The panoramic and CBCT features (predictive variables) were correlated with IAN exposure and injury (outcome variables). Sensitivity and specificity of modalities in predicting IAN exposure were compared. The IAN was exposed in 23 cases during third molar removal and injury occurred in 5 patients. No significant difference in sensitivity and specificity was found between both modalities in predicting IAN exposure. To date, lingual position of the mandibular canal was significantly associated with IAN injury. CBCT was not more accurate at predicting IAN exposure during third molar removal, however, did elucidate the 3D relationship of the third molar root to the mandibular canal; the coronal sections allowed a bucco-lingual appreciation of the mandibular canal to identify cases in which a lingually placed IAN is at risk during surgery. This observation dictates the surgical approach how to remove the third molar, so the IAN will not be subjected to pressure. PMID:19640685

Ghaeminia, H; Meijer, G J; Soehardi, A; Borstlap, W A; Mulder, J; Bergé, S J

2009-09-01

207

Follow-up study of apicoectomized molars.  

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The present material consists of 46 respected molars, 20 of which were located in the maxilla and 26 in the mandible. Altogether, 93 different roots were resected and 109 root fillings made. The follow-up study was made 1-6 years after the apicoectomy. The patients were examined clinically, special attention being paid to the subjective and objective symptoms shown by each apicoetomized tooth. Then a stereoscopic picture of the resected tooth and an orthopantomogram were taken. Of these 46 apicoectomized teeth, 33 (71%) showed complete healing, five (11%) were uncertain, four (9%) showed unsatisfactory healing, and four (9%) were extracted. When examining molars it seems reasonable to study each root as a separate case. Among the 93 apicoectomized roots, there were 75 (81%) cases of complete healing, six (6%) of uncertain healing, four (4%) of unsatisfactory healing, and eight (9%) extractions. There was no difference between the groups of radicular cysts and periapical granulomas in healing. The percentage of cases of complete healing was higher when approximately one-half of the roots were resected than when approximately one-third were resected. The orthograde root filling made in connection with resection was found better than the retrograde or the earlier orthograde filling. It was also found that when several periapical lesions were present in the other teeth, the number of complete healings in the group of resected teeth was less. PMID:818035

Altonen, M; Mattila, K

1976-02-01

208

Molar incisor hypomineralization, prevalence, and etiology.  

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Aim. To evaluate the prevalence and possible etiological factors associated with molar incisor hypomineralization (MIH) among a group of children in Jeddah, Saudi Arabia. Methods. A group of 8-12-year-old children were recruited (n = 267) from the Pediatric Dental Clinics at the Faculty of Dentistry, King Abdulaziz University. Children had at least one first permanent molar (FPM), erupted or partially erupted. Demographic information, children's medical history, and pregnancy-related data were obtained. The crowns of the FPM and permanent incisors were examined for demarcated opacities, posteruptive breakdown (PEB), atypical restorations, and extracted FPMs. Children were considered to have MIH if one or more FPM with or without involvement of incisors met the diagnostic criteria. Results. MIH showed a prevalence of 8.6%. Demarcated opacities were the most common form. Maxillary central incisors were more affected than mandibular (P = 0.01). The condition was more prevalent in children with history of illnesses during the first four years of life including tonsillitis (P = 0.001), adenoiditis (P = 0.001), asthma (P = 0.001), fever (P = 0.014), and antibiotics intake (P = 0.001). Conclusions. The prevalence of MIH is significantly associated with childhood illnesses during the first four years of life including asthma, adenoid infections, tonsillitis, fever, and antibiotics intake. PMID:24949012

Allazzam, Sulaiman Mohammed; Alaki, Sumer Madani; El Meligy, Omar Abdel Sadek

2014-01-01

209

A case of inferior lumbar hernia  

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In this article we report a case of inferior lumbar hernia. The patient underwent preperitoneal meshplasty. The patient is well on follow up with no recurrence. The relevant literature has been reviewed and management discussed in brief. [Int J Res Med Sci 2013; 1(1.000): 33-35

2013-01-01

210

Breast Reconstruction: Deep Inferior Epigastric Perforator  

Medline Plus

Full Text Available ... surgeon, and I'll be your moderator for today's program. Today we're going to provide you with an ... MARK L. SMITH, MD, FACS: Thanks, Will. Yes, today we're going to discuss the deep inferior ...

211

Breast Reconstruction: Deep Inferior Epigastric Perforator  

Medline Plus

Full Text Available ... look at nipple areolar-sparing mastectomy and immediate reconstruction using the deep inferior epigastric perforator flap, or the DIEP flap. I'm pleased to introduce my colleague, Dr. Mark Smith, who's the associate chief of plastic surgery here at Beth Israel. 00:01:55 MARK ...

212

Intraosseous course of the inferior alveolar (dental) nerve and its relative position in the mandible.  

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The present study was planned to evaluate the position of the mandibular foramen (MF) and the course of the inferior alveolar nerve in 12 right and 14 left cadaveric hemimandibles. The soft tissue including the muscle attachments of the mandible was cleaned and the inferior neurovascular bundle was dissected up to the MF. The distances from the MF to the angle, symphysis menti, 3rd molar, and the lower point of the mandibular notch were measured. The bone was chiseled from its lingual surface to expose the mandibular canal. The distances from the nerve to the alveolar and inferior borders were measured. The distance from the MF to different landmarks did not show any side differences except the one to the symphysis menti (P<0.05; Mann-Whitney 'U' test). Similarly the distances from the nerve to the borders also did not show any significant side differences. These data indicate that, on average, MF is located at a symmetrical point on the ramus on either side, although, not exactly at a fixed distance from any landmarks tested. Further, the canals were located either at near to the middle or below near to the base of the mandible. This study concludes that, the location of the MF varies from bone to bone despite its bilateral symmetry. Further, the canal and consequently the nerve do not maintain a constant position in the mandible. PMID:15915631

Narayana, K; Vasudha, Saralaya

2004-01-01

213

Lower dental arch changes after bilateral third molar removal.  

Science.gov (United States)

OBJECTIVE. To evaluate the changes in lower dental arch after bilateral lower third molars removal. MATERIAL AND METHODS. The study group consisted of 30 non-orthodontic patients (mean age 25,5 years, refered for bilateral lower third molars removal. Orthopantomograms and dental casts were made before and 6-8 months after surgical removal of lower third molars. Transversal lower arch widths between lower canines and second premolars and lower arch total tooth size-arch lenght discrepancy were evaluated on dental casts. The angulation of lower second premolars, first and second molars was measured in horizontal and mandibular planes on orthopantomograms. RESULTS. No significant difference of inter-canine and inter-premolar transversal width was noticed. No significant changes were observed in total tooth-size lenght discrepancy, except in S1 segment consisted of first and second premolar and the canine on the right quadrant of the lower dental arch. The angulation of second premolars and first molars did not show any significant changes, however there were statistically significant changes between angulation of lower second molars on both sides. CONCLUSIONS. After bilateral removal of lower third molars, lower second molars awhile showed a tendency to move backwards, but no obvious relationship between the third molar and anterior crowding was observed. Whereas the observation time is short and the patient's age is young and it can not be concluded that lower third molars cause the changes in the dental arch. PMID:24824058

Stanaityt?, R?ta; Trakinien?, Giedr?; Gervickas, Albinas

2014-01-01

214

Sarcoma de vena cava inferior Sarcoma of the vena cava inferior  

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Full Text Available Se presentó un caso infrecuente de una paciente con tumor abdominal y gran circulación colateral superficial tipo cava-cava, el ultrasonido abdominal, el ecocardiograma trans-torácico y transesofágico y la tomografía axial computarizada identificaron un tumor de la vena cava inferior. La citología aspirativa con aguja fina de la lesión confirmó que se trataba de un sarcoma fusopleomórfico de alto grado de malignidad primario de la vena cava inferior.Authors present an infrequent case of a female patient with abdominal tumor a great superficial collateral circulation type cava-cava, the abdominal ultrasound, the transthoracic and transesophageal echocardiogram and the computerized axial tomography (CAT identified a tumor of the vena cava inferior. The fine-needle aspiration cytology of lesion confirmed the presence of primary fusopleomorphous sarcoma of high degree of malignancy of vena cava inferior.

Jorge Luis León Álvarez

2010-12-01

215

Correção da hipoplasia de polo inferior da mama / Surgical correction of breast inferior pole hypoplasia  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese INTRODUÇÃO: As mamas com hipoplasia de polo inferior apresentam aspecto desarmônico, com o sulco inframamário alto, predominância de volume glandular nos quadrantes superiores, e, consequentemente, direcionamento inferior do complexo areolopapilar. É meta desejável, nesses casos, a correção da forma [...] desarmônica das mamas, bem como de eventuais assimetrias, com cicatrizes mínimas ou inconspícuas. O objetivo deste trabalho é apresentar técnica cirúrgica para correção de hipoplasia de polo inferior da mama. MÉTODO: A técnica cirúrgica utilizou retalho interno rodado para reconfigurar a mama e reposicionar o sulco inframamário, tendo como vias de acesso cirúrgico tão somente as cicatrizes por onde se colocam as próteses. RESULTADOS: A técnica descrita foi utilizada em 4 pacientes com hipoplasia de polo inferior de mama, com idades variando entre 19 anos e 27 anos. Os resultados demonstram que a correção da deformidade mamária foi alcançada adequadamente, bem como o reposicionamento do sulco inframamário, sem provocar irregularidades no contorno inferior da mama. CONCLUSÕES: A técnica proposta é uma alternativa adequada para o tratamento de casos selecionados de deformidade mamária com hipoplasia de polo inferior. Abstract in english BACKGROUND: Breasts with inferior pole hypoplasia have a disharmonious appearance owing to a high inframammary fold and the prevalence of glandular volume in the upper quadrants that results in a lower inclination of the nipple-areola complex. In these patients, the goal is to correct the disharmoni [...] ous shape of their breasts and possible asymmetries while causing minimal or inconspicuous scars. The aim of this study was to present a surgical technique to correct breast inferior pole hypoplasia. METHODS: The surgical technique involved a rotated internal flap to reshape the breast and relocate the inframammary fold, a result achieved using only the scores where the implants would be positioned as surgical access routes. RESULTS: The procedure described here was used in four patients aged 19-27 years with breast inferior pole hypoplasia. The results demonstrate that the correction of breast deformities was properly achieved, and the inframammary fold was repositioned without any irregularities in the inferior breast contour. CONCLUSIONS: The technique proposed here is a suitable alternative for the treatment of selected cases of breast deformities with hypoplasia of the inferior pole.

Victor Vieira, Orsi; Gustavo Levacov, Berlim; Carlos Eduardo Ochoa, Tagliari; Diego Ilha, Thomasi; Pedro Bilibio, Westphalen; João Valter, Pires Junior.

216

Leiomiossarcoma de veia cava inferior Leiomyosarcoma of the inferior vena cava  

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We present a case of a 56-year-old woman with abdominal pain, normal laboratorial exams, normal carcinoembryonary antigen (CEA) and abdominal tomography exam with tumor formation in hepatic region. A tumor lesion was identified in a surgery in the medial segment of the inferior vena cava. A surgical resection was done, respecting the security limits, and reconstruction of the inferior vein with polytetrafluoroethylene (PTFE) graft was performed. The histologic...

2006-01-01

217

Sarcoma de vena cava inferior Sarcoma of the vena cava inferior  

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Se presentó un caso infrecuente de una paciente con tumor abdominal y gran circulación colateral superficial tipo cava-cava, el ultrasonido abdominal, el ecocardiograma trans-torácico y transesofágico y la tomografía axial computarizada identificaron un tumor de la vena cava inferior. La citología aspirativa con aguja fina de la lesión confirmó que se trataba de un sarcoma fusopleomórfico de alto grado de malignidad primario de la vena cava inferior.Authors present an infrequent ...

2010-01-01

218

Update on molar pregnancy and choriocarcinoma.  

Science.gov (United States)

The term gestational trophoblastic disease encompasses a wide spectrum of disorders ranging from the benign hydatidiform mole to the malignant choriocarcinoma and placental site trophoblastic tumor. Recent advances in cytogenetics and pathological criteria have brought to light the occurrence of the partial mole, which is probably more common than the complete mole. The World Health Organisation has proposed a classification to rectify the current confusion that exists with clinical and pathological terms. Evacuation of the uterus followed by meticulous followup with sensitive beta subunit Human Chorionic Gonadotropin assay remain the cornerstone of management of molar pregnancy. Prompt chemotherapy is the most important aspect in managing malignant sequelae. Newer chemotherapy regimes have helped to salvage failures from the usual drugs. Judicial use of surgery in metastatic trophoblastic disease can reduce the duration and toxicity of chemotherapy. All patients with gestational trophoblastic disease should be managed in a tertiary care centre with the expertise and facilities easily available to manage these cases. PMID:2694375

Ilancheran, A; Singh, P

1989-10-01

219

Third molar surgery in general dental practice.  

Science.gov (United States)

A survey to determine the treatment procedures adopted by general dental practitioners for the removal of impacted third molar teeth was undertaken. Questionnaires were mailed to a sample of 100 practising dentists. Of the 67 per cent that responded, 41.8 per cent (28) indicated that they would attempt the procedure while the remaining 51.2 per cent (39) would not do so. Neither the length of professional experience nor whether they practised in metropolitan or country areas had a bearing on whether the impacted tooth would be removed or not. In general, South African general dental practitioners routinely removed overlying bone by means of a bur, sutured the mucosal incision wound, prescribed antibiotics, analgesics and a mouthwash, and recalled their patients for a post-operative review. Steroids were not prescribed. PMID:9461920

Naidoo, L C

1997-02-01

220

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

2002-10-01

 
 
 
 
221

Amoxicillin may cause molar incisor hypomineralization.  

Science.gov (United States)

The etiology of molar incisor hypomineralization (MIH) is unclear. Our hypothesis was that certain antibiotics cause MIH. We examined 141 schoolchildren for MIH and, from their medical files, recorded the use of antibiotics under the age of 4 yrs. MIH was found in 16.3% of children. MIH was more common among those children who had taken, during the first year of life, amoxicillin (OR=2.06; 95% CI, 1.01-4.17) or the rarely prescribed erythromycin (OR=4.14; 95% CI, 1.05-16.4), compared with children who had not received treatment. Mouse E18 teeth were cultured for 10 days with/without amoxicillin at concentrations of 100 microg/mL-4 mg/mL. Amoxicillin increased enamel but not dentin thickness. An altered pattern of amelogenesis may have interfered with mineralization. We conclude that the early use of amoxicillin is among the causative factors of MIH. PMID:19278983

Laisi, S; Ess, A; Sahlberg, C; Arvio, P; Lukinmaa, P-L; Alaluusua, S

2009-02-01

222

Molar distalization by intra-oral force application.  

Science.gov (United States)

The molar distalizing bow (MDB) guarantees controlled distal movement of the molars. It is easy to handle, can be removed at any time and can be worn almost full time. Since there is no extra-oral force, there are no unphysiological effects on the cervical spine and neck muscles or on the molars to be moved. Furthermore, there is no risk of injury by wearing the appliance. Modifications of the basic appliance broaden the range of applications. PMID:2032566

Jeckel, N; Rakosi, T

1991-02-01

223

Possibilty of the lower third molar eruption: Radiographic analysis  

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Backgraund/Aim. To assess the possibility of the eruption of the lower third molar on the basis of the measured parameters: retromolar space, mesiodistal crown width of a molar and the third molar angulation. Methods. The investigation included 104 patients both sexes (43 boys, and 61 girls), 16 to 25 years old (meanage, 18 years). It was performed using the orthopanthomographic radiographs analysis of those patients. Each radiograph was covered by tracing paper, and the contoures of the foll...

Nedeljkovi? Nenad; Stamenkovi? Zorana; Tati? Zoran; Ra?i? Alek

2006-01-01

224

Recent advances of Pendulum Appliance for Effective Molar Distalization  

Directory of Open Access Journals (Sweden)

Full Text Available Molar distalization is the process of moving the terminal molars distally. It is one of the non extraction treatment modalities which is frequently followed in the regular clinical practice. To achieve a compliance free molar distalization, Hilger's Pendulum appliance is the best choice. It has undergone many modifications since its introduction to best suit a clinical situation. This article reviews the Pendulum appliance and its various modifications in brief.

Vikasini K

2011-10-01

225

Recent advances of Pendulum Appliance for Effective Molar Distalization  

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Molar distalization is the process of moving the terminal molars distally. It is one of the non extraction treatment modalities which is frequently followed in the regular clinical practice. To achieve a compliance free molar distalization, Hilger's Pendulum appliance is the best choice. It has undergone many modifications since its introduction to best suit a clinical situation. This article reviews the Pendulum appliance and its various modifications in brief.

Lalitha Ch; Vasumurthy S; Vikasini K

2011-01-01

226

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)

Full Text Available SciELO Chile | Language: English Abstract in spanish 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.

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

227

A Prospective, Randomized, Double-Blind Study of the Anesthetic Efficacy of Sodium Bicarbonate Buffered 2% Lidocaine With 1?:?100,000 Epinephrine in Inferior Alveolar Nerve Blocks  

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The authors, using a crossover design, randomly administered, in a double-blind manner, inferior alveolar nerve (IAN) blocks using a buffered 2% lidocaine with 1?:?100,000 epinephrine/sodium bicarbonate formulation and an unbuffered 2% lidocaine with 1?:?100,000 epinephrine formulation at 2 separate appointments spaced at least 1 week apart. An electric pulp tester was used in 4-minute cycles for 60 minutes to test for anesthesia of the first and second molars, premolars, and latera...

Whitcomb, Michael; Drum, Melissa; Reader, Al; Nusstein, John; Beck, Mike

2010-01-01

228

Profile changes in premolar extraction / Alterações no perfil em extrações de pré-molares  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese OBJETIVO: Este estudo retrospectivo avaliou pacientes tratados com exodontias de pré-molares através da análise de telerradiografias, comparando o efeito de diferentes protocolos de exodontias no perfil. METODOLOGIA: 87 pacientes foram selecionados da clínica particular de três ortodontistas diploma [...] dos pelo Board Brasileiro de Ortodontia e Ortopedia Facial. Estes pacientes foram tratados com aparelho fixo Edgewise e foram divididos em três grupos, de acordo com a sequência de pré-molares extraídos: "Grupo 40", primeiros pré-molares superiores (22 pacientes); "Grupo 44", quatro primeiros pré-molares (43 pacientes); e "Grupo 45", primeiros pré-molares superiores e segundos inferiores (22 pacientes). O Ângulo Z e a Linha de Burstone foram utilizados para quantificar e comparar os perfis antes e após o tratamento. RESULTADOS: O teste t-student mostrou melhora no perfil em todos os grupos, visto que o valor do ângulo Z apresentou-se maior ao final do tratamento e as medidas dos lábios vieram ao encontro dos valores preconizados por Burstone. A análise das mudanças proporcionadas pelo tratamento pela ANOVA não revelou diferenças significativas entre os grupos CONCLUSÃO: Os protocolos produzem aparências faciais semelhantes ao final do tratamento. Abstract in english PURPOSE: This retrospective study assessed patients treated with extraction of premolars by analysis of lateral cephalograms, comparing the effect of different tooth extraction protocols on the profile. METHODS: Eighty-seven patients were selected from the private practices of three orthodontists ce [...] rtified by the Brazilian Board of Orthodontics and Facial Orthopedics. These patients were treated with fixed edgewise appliances and divided into three groups according to the sequence in which premolars were extracted: "Group 40", maxillary first premolars (22 patients); "Group 44", both maxillary and mandibular first premolars (43 patients); and "Group 45", maxillary first and mandibular second premolars (22 patients). The Z angle and the Burstone line were used to quantify and compare the profiles before and after treatment. RESULTS: Student's t-test showed profile improvement in all groups, as the Z angle value was higher at treatment completion and the lip measurements were in agreement with the values recommended by Burstone. Analysis of treatment changes by the ANOVA did not reveal significant differences between groups. CONCLUSION: The protocols produced similar facial appearance at treatment completion.

Susiane, Allgayer; Eduardo M. Santayana de, Lima; Susana Deon, Rizzatto; Carlos Alberto Estevanell, Tavares; Luciane Macedo de, Menezes; Mauricio Barbieri, Mezzomo.

229

Extração de incisivo inferior: uma opção de tratamento ortodôntico Lower incisor extraction: an orthodontic treatment option  

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Full Text Available A exodontia de um incisivo inferior pode ser considerada uma opção valiosa na busca de excelência nos resultados ortodônticos para obtenção de máxima função, estética e estabilidade. O objetivo deste estudo foi reunir informações referentes às indicações, contraindicações, vantagens, desvantagens e estabilidade dos resultados obtidos nos tratamentos realizados com extração de um incisivo inferior. Essa opção de tratamento pode ser indicada em más oclusões com discrepância de volume dentário anterior devido a incisivos superiores estreitos e/ou incisivos inferiores largos. É contraindicada em más oclusões sem discrepância anterior ou com discrepâncias ocasionadas por incisivos superiores largos e/ou incisivos inferiores estreitos. A literatura sugere maior estabilidade pós-tratamento quando comparada com a opção de extrações de pré-molares. Além do diagnóstico cuidadoso, obtido com a colaboração do set-up, a habilidade e a experiência clínica do profissional são importantes para o sucesso dos resultados ortodônticos alcançados com essa opção de tratamentoLower incisor extraction can be regarded as a valuable option in the pursuit of excellence in orthodontic results in terms of function, aesthetics and stability. The aim of this study was to gather information about the indications, contraindications, advantages, disadvantages and stability of the results achieved in treatments performed with lower incisor extraction. This treatment option may be indicated in malocclusions with anterior dental volume discrepancy due to narrow maxillary incisors and/or large mandibular incisors. It is contraindicated in malocclusions without anterior discrepancy or with discrepancies caused by large maxillary incisors and/or narrow mandibular incisors. The literature suggests this method affords improved posttreatment stability compared with premolar extraction. As well as a careful diagnosis, established with the aid of a diagnostic setup, professional skills and clinical experience are instrumental in achieving successful orthodontic results with this treatment option

Mírian Aiko Nakane Matsumoto

2010-12-01

230

Response of molars and non-molars to a strict supragingival control in periodontal patients  

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Full Text Available SciELO Brazil | Language: English Abstract in english The posterior position in the arches is one of the factors that underlies the poor prognosis of molar teeth (M). It is speculated that M do not benefit from the oral hygiene routine as well as non-molars (NM) do. This study evaluated the response of M and NM to supragingival control during a 6-month [...] period in 25 smokers (S) and 25 never-smokers (NS) with moderate-to-severe periodontitis. One calibrated examiner assessed visible plaque (VPI) and gingival bleeding (GBI) indexes, periodontal probing depth (PPD), bleeding on probing (BOP), and clinical attachment loss (CAL) at days 0 (baseline), 30 and 180. At baseline, M showed significantly higher mean values of VPI (p = 0.017) and PPD (p

Angst, Patrícia Daniela Melchiors; Piccinin, Flávia Benetti; Oppermann, Rui Vicente; Marcantonio, Rosemary Adriana Chiérici; Gomes, Sabrina Carvalho.

231

Complex malformation of the inferior vena cava.  

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Malformations of the inferior vena cava (IVC) are rare presentations, exceptional in children, and are usually asymptomatic.They are caused by disturbances in the embryological formation of the venous system or can develop as a result of perinatal venous thrombosis with secondary impairment of the venous development. We report the case of a 14 year old boy,admitted for pediatric evaluation before undergoing plastic surgery in order to remove superficial varicose veins of the lower abdomen. The patient presents with inequality in circumference and length of the legs. Laboratory investigations are normal and the abdominal ultrasound describes hypoplasia of the retrohepatic segment of the inferior vena cava. The diagnosis of complex malformation of the abdominal deep venous system (retrohepatic vena cava atresia, cavo-caval anastomosis through azygos veins, abnormal formation of the inferior vena cava with the absence of the left iliac vein) was established through a CT angiography. The presence of abdominal varicose dilations should indicate the necessity to closely look for malformations of the portal and/or caval venous systems. PMID:24742422

Lesanu, G; Balanescu, R; Pacurar, D; Iaru, O; Vlad, R M; Topor, L; Oraseanu, D

2014-01-01

232

First permanent maxillary molar morphology and ideal occlusion.  

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Full Text Available AIM. To assess if variations in the anatomy of the upper first permanent molar might prevent the establishment of an ideal molar occlusion after orthodontic treatment. DESIGN. Measurements on dental casts selected at random from initial orthodontic records. MATERIALS AND METHODS. Forty maxillary dental casts were selected using criteria that assured the anatomical integrity of the upper right first permanent molar. The casts were scanned and the position of the molar cusps was measured using computer software. MAIN OUTCOME MEASURES. a. Buccal width (BW: the width between the buccal cusps. b. Cusp angle (CA: the angle between the lines joining the buccal and palatal cusps. c. Dist: the distance of the mesiobuccal cusp from a line perpendicular to the line joining the palatal cusps and passing through the mesiopalatal cusp. RESULTS. BW: mean 4.88 mm (SD: 0.41 mm, range: 4.2 – 6.0 mm. CA: mean -2.43 degrees (SD: 6.01, range -12.7 – 13.8 degrees. Dist: mean 2.15 mm (SD: 0.69 mm, range 1.0 – 3.8 mm. A large variability was noted. The morphology of 20% of the molars was such, that, if the mesiopalatal cusp were properly positioned in the central groove of the lower molar, the mesiobuccal cusp would be more than one-fifth cusp mesial or distal to the mesiobuccal groove of the lower molar. CONCLUSIONS. In some cases, the anatomy of the upper molar may not allow an ideal molar occlusion, and compromises in molar positioning may be required. The results of this study are based on the assumption of an average lower molar morphology and cuspal relationship.

D. I. Halazonetis

2000-01-01

233

EMBARAZO ECTÓPICO MOLAR CORNUAL: CASO CLÍNICO  

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Full Text Available SciELO Chile | Language: Spanish Abstract in spanish 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.

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

234

EMBARAZO ECTÓPICO MOLAR CORNUAL: CASO CLÍNICO  

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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.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 reported 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.

Clara del Carmen Flores Acosta

2010-01-01

235

Relationship between hypoesthesia of the lower lip after extraction of the mandibular third molar and preoperative imaging findings on panoramic X-ray films and multi-planer reconstructive CT scans  

International Nuclear Information System (INIS)

The mandibular third molars are usually located near the inferior alveolar nerve. Surgical removal of these molars may damage the nerve and cause hypoesthesia of the lower lip. Before surgery, it is important to examine the exact positional relationship between the mandibular third molars and the mandibular canal to prevent such complications. A total of 329 lower third molars from 198 patients were studied on panoramic radiographs and computed tomography (CT). We studied the association of hypoesthesia with the spacial relation between the tooth roots and the mandibular canal. Hypoesthesia occurred in 23 of 329 teeth (7.0%). Almost all cases of hypoesthesia resolved within 6 months. However, hypoesthesia of 3 teeth (0.9%) persisted approximately 7 to 12 months after surgery. In 206 of 329 teeth (62.6%), the assumed location of the mandibular canal differed between panoramic radiography and CT. Furthermore, the prediction rate of the incidence of type 1 hypoesthesia on CT (35.5%) was higher than that on panoramic radiography (15.9%). Risk factors related to hypoesthesia included loss of the white line of the root, curve of the mandibular canal, and close proximity of the tooth to the mandibular canal (Type 1) on panoramic radiography. There were also teeth in contact with the canal (0 mm) in all patients in whom hypoesthesia developed. In particular, patients whose mandibular canals were located between the roots of the mandibular third molar or on the lingual side of the mandibular third molar had a high incidence of hypoesthesia (26.0%). These results suggest that the positional relation between the mandibular third molars and the mandibular canal should be accurately evaluated by CT. Because of its high resolution and ability to examine patients in detail, CT was found to be useful for predicting the risk of inferior alveolar nerve damage before mandibular third molar surgery. (author)

2010-10-01

236

Treatment options for hypomineralized first permanent molars and incisors  

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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.

Ivanovi? Mirjana

2006-01-01

237

Molar incisor hypomineralisation: clinical management of the young patient.  

LENUS (Irish Health Repository)

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.

Daly, Dympna

2009-04-01

238

Molar extinction coefficients of some fatty acids  

Energy Technology Data Exchange (ETDEWEB)

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.

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

2002-10-01

239

Possibilty of the lower third molar eruption: Radiographic analysis  

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Full Text Available Backgraund/Aim. To assess the possibility of the eruption of the lower third molar on the basis of the measured parameters: retromolar space, mesiodistal crown width of a molar and the third molar angulation. Methods. The investigation included 104 patients both sexes (43 boys, and 61 girls, 16 to 25 years old (meanage, 18 years. It was performed using the orthopanthomographic radiographs analysis of those patients. Each radiograph was covered by tracing paper, and the contoures of the followiny anatomic details were drawn: a the crown and root contours of third molars, upper and lower central incisors, distal molars in occlusion, anterior edge of ramus mandible, b lines: 1. the occlusal plane, 2. the line of retromolar space, 3. the mesiodistal crown width of third molar, 4. the axial shaft of the third molar and the distal angle between occlusal plane and the axial shaft of the third molar. The values were measured with an orthodontic caliper: the diameter of retromolar space, diameter of mesiodistal width, the value of distal angle between occlusal plane and axial shaft of molar. Results. A favourable angulation of the lower third molar (more than 60° was found in, boys (left 27.90%, right 32.55%, girls (left 39.34%, right 37.77%. A favourable relationship between the diameters of mesiodistal width of the third molar and retromolar space was found in, boys, (left 13.59%, right 16.27%, girls, (left 8.19%, right 14.75%. A favorable relationship between the diameters of mesiodistal width of the third molar and the retromolar space and the angulation was found in boys, (left 9.30%, right 11.62%, girls, (left 6.56%, right 9.83%. Conclusion. There was not any statistically significant difference found between the relation of the retromolar value, third molar mesiodistal diameter, or of the third molar angulation to the left and the right side nor of their mutual relations in comparing boys and girls. A favorable prognosis was found in 9.33% of the patients.

Nedeljkovi? Nenad

2006-01-01

240

Migrating third molar: a report of a case.  

Science.gov (United States)

Pathologic migration is an abnormal change in the position of a tooth within the dental arch. There are many etiologic factors associated with this phenomenon, but the exact cause is often difficult to diagnose. The following is a report of a 42-year-old man exhibiting a unique form of bilateral migration of his mandibular third molars. He was asymptomatic and unaware of this occurrence. The morbidity to remove these teeth was deemed too great to justify extraction. Biopsy of the overlying tissue associated with a left-impacted third molar revealed no significant pathologic process other than inflammation and some hyperplasia within the dental follicle. Histologic-radiographic correlation was inconclusive in determining whether epithelium from pericoronal soft tissue involving the right third molar was from a hyperplastic dental follicle or a small dentigerous cyst. It is speculated that the ultimate cause of the migration of the third molars was severe, aggressive periodontal disease of the adjacent molars. PMID:14620643

Francis, Paul Olsen; Fowler, Edward Brian; Willard, Craig C

2003-10-01

 
 
 
 
241

Prosthetic rehabilitation of a hemisected maxillary molar: a rare entity.  

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Gingival recession beyond grade III and grade IV level involving furcation defects can lead to tooth loss if not intervened at appropriate time. The treatment options include scaling and root planing, Furcation-plasty, Tunnel preparation, Root separation and resection. The chief complaint of the patient was pain in the upper left first molar because of grade III furcation involvement. Since it was a four rooted molar, the treatment of choice was hemisection of the tooth and extraction of the distal half following endodontic treatment. As the second molar was mesially tilted the prosthodontic rehabilitation was done with a hybrid prosthesis involving a full coverage conventional porcelain fused to metal retainer on the hemisected molar and a resin bonded partial coverage retainer on the tilted second molar. The resultant prosthesis is termed as "Hybrid prosthesis". PMID:24431763

Yadav, Preeti; Tahir, Mohammed; Kumar, M V Sunil; Rao, Harikesh

2013-09-01

242

Disección septal tras infarto de miocardio inferior / Septal dissection after inferior acute myocardial infarction  

Scientific Electronic Library Online (English)

Full Text Available SciELO Argentina | Language: Spanish Abstract in spanish La disección del septum interventricular y su rotura constituyen una posible causa de la comunicación interventricular luego de un infarto de miocardio. En esta presentación se describe el caso de un varón de 68 años con un infarto agudo de miocardio inferior que fue intervenido en forma satisfactor [...] ia de un seudoaneurisma septal diagnosticado intraoperatoriamente. Abstract in english Septal dissection after inferior acute myocardial infarction Septal dissection and rupture are a possible cause of ventricular septal defect after acute myocardial infarction. This presentation reports the case of a 68 year-old man with inferior acute myocardial infarction, who was satisfactorily op [...] erated of a septal pseudoaneurysm diagnosed intraoperatively

Eladio, Sánchez; Manuela, Cid-Cumplido; Ibrahim S, Tarhini; Tomás, Pineda; José F, González.

243

Sarcoma de vena cava inferior / Sarcoma of the vena cava inferior  

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Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish Se presentó un caso infrecuente de una paciente con tumor abdominal y gran circulación colateral superficial tipo cava-cava, el ultrasonido abdominal, el ecocardiograma trans-torácico y transesofágico y la tomografía axial computarizada identificaron un tumor de la vena cava inferior. La citología a [...] spirativa con aguja fina de la lesión confirmó que se trataba de un sarcoma fusopleomórfico de alto grado de malignidad primario de la vena cava inferior. Abstract in english Authors present an infrequent case of a female patient with abdominal tumor a great superficial collateral circulation type cava-cava, the abdominal ultrasound, the transthoracic and transesophageal echocardiogram and the computerized axial tomography (CAT) identified a tumor of the vena cava inferi [...] or. The fine-needle aspiration cytology of lesion confirmed the presence of primary fusopleomorphous sarcoma of high degree of malignancy of vena cava inferior.

León Álvarez, Jorge Luis; Roselló Silva, Nelson; Llorens Núñez, Martha; Ochoa Montes, Luis Alberto; Zarza Llorca, Yoanka; Senra Piedra, Gerardo.

244

Leiomiossarcoma de veia cava inferior / Leiomyosarcoma of the inferior vena cava  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese [...] Abstract in english We present a case of a 56-year-old woman with abdominal pain, normal laboratorial exams, normal carcinoembryonary antigen (CEA) and abdominal tomography exam with tumor formation in hepatic region. A tumor lesion was identified in a surgery in the medial segment of the inferior vena cava. A surgical [...] resection was done, respecting the security limits, and reconstruction of the inferior vein with polytetrafluoroethylene (PTFE) graft was performed. The histological examination showed differentiated leiomyossarcoma of the inferior vena cava. This report points to the necessity of differential diagnoses with leiomyossarcoma in the presence of abdominal mass, supra-mesocolic, and non-specific abdominal symptoms, since its pre-surgical diagnoses occurs in only 5% to 10% of the cases.

Lino Luis Sanches, Larangeira; Naja, Nabut; Alda L., Guembarovski.

245

Leiomiossarcoma de veia cava inferior Leiomyosarcoma of the inferior vena cava  

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Full Text Available We present a case of a 56-year-old woman with abdominal pain, normal laboratorial exams, normal carcinoembryonary antigen (CEA and abdominal tomography exam with tumor formation in hepatic region. A tumor lesion was identified in a surgery in the medial segment of the inferior vena cava. A surgical resection was done, respecting the security limits, and reconstruction of the inferior vein with polytetrafluoroethylene (PTFE graft was performed. The histological examination showed differentiated leiomyossarcoma of the inferior vena cava. This report points to the necessity of differential diagnoses with leiomyossarcoma in the presence of abdominal mass, supra-mesocolic, and non-specific abdominal symptoms, since its pre-surgical diagnoses occurs in only 5% to 10% of the cases.

Lino Luis Sanches Larangeira

2006-04-01

246

Leiomiossarcoma de veia cava inferior Leiomiossarcoma of the inferior vena cava  

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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.

Eduardo Crema

2008-12-01

247

Leiomyosarcoma of the inferior vena cava.  

Science.gov (United States)

The thirty-second case of leiomyosarcoma of the inferior vena cava and the twelfth resectable patient in the series is presented. A review of the literature demonstrates a marked female preponderance (5 to 1). The most common presenting symptom is right abdominal pain and a palpable mass. The different surgical problems generated by the involved segment of the cava are discussed. Noteworthy is the high incidence of Budd-Chiari syndrome owing to hepatic vein obstruction with involvement of the upper third of the cava in the postmortem cases. An argument is developed for debulking the tumor for palliation when it is not completely removable. PMID:95619

Diamond, H M; Lyon, E S; Hui, N T; De Pauw, A P

1976-10-01

248

The leiomyosarcoma of the vena cava inferior  

International Nuclear Information System (INIS)

The leiomyosarcoma of the Vena cava inferior is a mesenchymal tumor originating from the smooth muscle fibers of the vascular wall. This tumor is usually slow-growing and of expansive growth. Prior to the sonographic and computer-tomographic era the tumor was usually only discovered during autopsy or surgery without any preoperative suspicion. Today, the most efficient imaging methods for exact localization, delineation or relation to the vascular lumen and local extent are sonography and computer tomography. Caudal cavography is called upon for preoperative demonstration of the venous collateral circulation and thrombotic vascular occlusion. (orig.)

1987-01-01

249

Influence of cervical preflaring on determinationof apical file size in mandibular molars: SEM analysis  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese Este estudo investigou a influência do alargamento cervical feito com diferentes instrumentos rotatórios na determinação do instrumento apical inicial (IAI) das raizes mésio-vestibulares de molares inferiores. Foram utilizados 50 molares inferiores cujas raízes mesiais apresentavam dois forames apic [...] ais nitidamente separados (mésio-vestibular e mésio-lingual). Após o acesso à câmara pulpar de forma convencional e remoção do tecido pulpar, o comprimento de trabalho foi definido a 1 mm do ápice radicular. Os dentes foram divididos aleatoriamente em cinco grupos (n= 10) de acordo com o tipo de instrumento utilizado no alargamento cervical. No grupo 1, o IAI foi definido sem o prévio alargamento dos terços médio e cervical das raízes. Nos grupos 2 a 5, o terço cervical e médio do canal radicular foi alargado com as brocas de Gates-Glidden, instrumentos Pro Taper, Endo Flare e brocas LA Axxes, respectivamente. A determinação do IAI foi realizada manualmente com limas tipo K em ordem crescente de diâmetro a partir da lima 08 até se chegar ao instrumento que permitisse ao operador ter a sensação tátil do mesmo estar firmemente ajustado ao CRT. O instrumento que correspondeu ao IAI foi fixado no interior do canal radicular com cianocrilato de metila. Com o IAI posicionado, os dentes foram seccionados transversalmente até 1 mm do ápice. As seções transversais do CRT foram observadas através da microscopia eletrônica de varredura e os desajustes entre o diâmetro do canal e o diâmetro do IAI foram calculados com a função "régua" (FEG) do software do próprio microscópio. Os resultados foram avaliados estatisticamente pelo testes de Kruskal-Wallis e Dunn ao nível de significância de 5%. Houve diferenças estatisticamente significantes entre os grupos (p Abstract in english This study investigated the influence of cervical preflaring with different rotary instruments on determination of the initial apical file (IAF) in mesiobuccal roots of mandibular molars. Fifty human mandibular molars whose mesial roots presented two clearly separated apical foramens (mesiobuccal an [...] d mesiolingual) were used. After standard access opening and removal of pulp tissue, the working length (WL) was determined at 1 mm short of the root apex. Five groups (n=10) were formed at random, according to the type of instrument used for cervical preflaring. In group 1, the size of the IAF was determined without preflaring of the cervical and middle root canal thirds. In groups 2 to 5, preflaring was performed with Gates-Glidden drills, ProTaper instruments, EndoFlare instruments and LA Axxes burs, respectively. Canals were sized manually with K-files, starting with size 08 K-files, inserted passively up to the WL. File sizes were increased until a binding sensation was felt at the WL and the size of the file was recorded. The instrument corresponding to the IAF was fixed into the canal at the WL with methylcyanoacrylate. The teeth were then sectioned transversally 1 mm short of the apex, with the IAF in position. Cross-sections of the WL region were examined under scanning electron microscopy and the discrepancies between canal diameter and the diameter of IAF were calculated using the tool "rule" (FEG) of the microscope's proprietary software. The measurements (µm) were analyzed statistically by Kruskal-Wallis and Dunn's tests at 5% significance level. There were statistically significant differences among the groups (p0.05) were found among the rotary instruments. In conclusion, cervical preflaring improved IAF fitting to the canals at the WL in mesiobuccal roots of maxillary first molars. The rotary instruments evaluated in this study did not differ from each other regarding the discrepancies produced between the IAF size and canal diameter at the WL.

Marcia da Silva, Schmitz; Roberto, Santos; Alexandre, Capelli; Marcos, Jacobovitz; Júlio César Emboava, Spanó; Jesus Djalma, Pécora.

250

Response of molars and non-molars to a strict supragingival control in periodontal patients  

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Full Text Available The posterior position in the arches is one of the factors that underlies the poor prognosis of molar teeth (M. It is speculated that M do not benefit from the oral hygiene routine as well as non-molars (NM do. This study evaluated the response of M and NM to supragingival control during a 6-month period in 25 smokers (S and 25 never-smokers (NS with moderate-to-severe periodontitis. One calibrated examiner assessed visible plaque (VPI and gingival bleeding (GBI indexes, periodontal probing depth (PPD, bleeding on probing (BOP, and clinical attachment loss (CAL at days 0 (baseline, 30 and 180. At baseline, M showed significantly higher mean values of VPI (p = 0.017 and PPD (p < 0.001 compared with NM; CAL was also greater in M (p < 0.001 and was affected by smoking (p = 0.007. The reductions obtained for periodontal indicators at day 180 showed similar responses between M and NM. For CAL, M (NS 0.57 ± 0.50; S 0.67 ± 0.64 and NM (NS 0.38 ± 0.23; S 0.50 ± 0.33 reached an almost significant difference (p = 0.05. Smoking did not influence the response to treatment. Multilevel analysis revealed that, only for PDD reductions, the interaction between sites, teeth and patient was significant (p < 0.001. It was concluded that M benefit from an adequate regimen of supragingival biofilm control; therefore, supragingival condition should be considered in the prognosis of molar teeth.

Patrícia Daniela Melchiors Angst

2013-02-01

251

A Four-Year Monocentric Study of the Complications of Third Molars Extractions under General Anesthesia: About 2112 Patients.  

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Introduction. The aim of this study was to assess the complications resulting from third molar extraction under general anesthesia. Material and Methods. The retrospective study included all patients who underwent impacted third molars extraction from January 2008 until December 2011. 7659 third molars were extracted for 2112 patients. Postoperative complications were retrieved from medical files. Results. No complications were related to general anesthesia. The most frequent postoperative complication was infection (7.15%). Lingual nerve injuries affected 1.8% of the patients. All of them were transient and were not related to tooth section. Inferior alveolar nerve injuries were reported in 0.4% of the cases. 95.8% of these patients were admitted for one-day ambulatory care, and only two patients were readmitted after discharge from hospital. Discussion. This surgical technique offers comfort for both surgeons and patients. Risks are only linked to the surgical procedure as we observed no complication resulting from general anesthesia. One-day hospitalization offers a good balance between comfort, security, and cost. The incidence of complications is in agreement with the literature data, especially regarding pain, edema, and infectious and nervous complications. It is of utmost importance to discuss indications with patients, and to provide them with clear information. PMID:24101928

Guerrouani, A; Zeinoun, T; Vervaet, C; Legrand, W

2013-01-01

252

Análise da presença do canal cavo-inter-radicular em molares: estudo in vitro = ‘In vitro’ analysis of acessory foramina in molar teeth  

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Full Text Available Evidências significativas sugerem a inter-relação existente entre a região de furca de dentes multirradiculados com o desenvolvimento de lesões endo-periodontais, principalmente, quando da presença do canal cavo-inter-radicular. Com o objetivo de compreender os mecanismos envolvidos na etiopatogenia de tais doenças periodontais, assim como propiciar o diagnóstico e o tratamento precoces, buscou-se melhor caracterizar essa região dando ênfase à morfologia do assoalho da câmara pulpar. Para este estudo foram selecionados 42 molares humanos extraídos, sendo 21 superiores e 21 inferiores. Após realizadas as aberturas coronárias e localizadas as entradas dos canais radiculares, os dentes tiveram parte das porções coronária e radicular cortada perpendicularmente ao longo do seu eixo, com o auxílio de disco de carburundum. Depois de uma criteriosa limpeza dos espécimes, esses foram secos em câmara de ponto crítico, sendo, a seguir, preparados para análise em microscópio eletrônico de varredura (Philips®, modelo XL30, Holanda. Os dados foram analisados através do Teste U de Mann- Whitney e do teste Qui-quadrado. Com base nos resultados obtidos e de acordo com a literatura pertinente, pôde-se verificar que: 1. o diâmetro e o número de túbulos dentinários encontrados por mm2 assim como a presença de foraminas no assoalho da câmara pulpar sugerem a permeabilidade dessa região; 2. o diâmetro maior de algumas foraminas identifica a presença do canal cavo-inter-radicular. Mounting evidence has suggested a relationship between the existing furcation region in multirradicular teeth and the development of endoperiodontal lesions. This effect is particulary pronounced when accessory foramina are present. In order to improve our understanding of the mechanisms involved in the etiopathogeny of periodontal disease, as well as facilitate early diagnosis and treatment, an attempt was made to characterize this region with special attention to the morphology of the pulp chamber floor. Forty-two extracted human molars (21 maxillary and 21 mandibular molars were used in this study. After the crows had been resected and the root canals openings identified, part of the coronal and radicular sections of the teeth were split longitudinally their axes with carborundum disc. After meticulous cleansing, the teeth were dried in a critical point dry chamber and then prepared for analysis in a Philips® XL-30, Holland, SEM. The collected data were submitted to statistical analysis by Mann-Whitney Test and Qui-square Test. The results obtained and a revision of literature shows that: 1. the number and diameter of dentinal tubules per mm2 found, as well as the presence of foramina on the pulp chamber floor are indicators of permeability in this region; 2. the wider diameter of some foramina indicate the presence of accessory foramina.

Machado, Geovana

2005-01-01

253

Influence of premolar extractions on the facial profile evaluated by the Holdaway analysis / Influência de exodontias de pré-molares no perfil facial avaliada pela análise de Holdaway  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese OBJETIVO: Este trabalho retrospectivo tem como proposta avaliar pacientes tratados com exodontias de pré-molares através de cefalometria em telerradiografia de perfil, comparando o efeito de diferentes protocolos de exodontias no perfil. METODOLOGIA: Oitenta e sete pacientes (31 meninos e 56 meninas [...] ) foram selecionados da clínica particular de três ortodontistas diplomados pelo Board Brasileiro de Ortodontia e Ortopedia Facial. Estes pacientes foram tratados com aparelho fixo Edgewise foram divididos em três grupos, compreendendo a sequência de exodontia de pré-molares empregada Grupo 40 compreendendo 22 pacientes tratados com exodontia de primeiros pré-molares superiores, Grupo 44 compreendendo 43 pacientes tratados com exodontia de quatro primeiros pré-molares e Grupo 45 compreendendo 22 pacientes tratados com exodontia de primeiros pré-molares superiores e segundos inferiores. A Análise de Holdaway foi utilizada para quantificar e comparar os perfis antes e após o tratamento dos grupos. RESULTADOS: O teste t-Student mostrou melhora no perfil em todos os grupos. Quando comparados entre si, ANOVA revelou que apenas a medida sulco lábio inferior em relação à linha H apresentou diferenças nas mudanças incrementais proporcionadas pelo tratamento, em que o grupo 44 apresentou uma diferença significativamente superior ao grupo 40. CONCLUSÃO: A partir dos resultados concluiu-se que os protocolos produzem aparências faciais semelhantes. Abstract in english PURPOSE: This retrospective study aimed at assessing patients treated with extraction of premolars through cephalometry in lateral teleradiography, comparing the effect of different tooth extraction protocols on the facial profile. METHODS: For this study, 87 patients (31 boys and 56 girls) were sel [...] ected from the private practices of three dentists certified by the Brazilian Board of Orthodontics and Facial Orthopedics. These patients were treated with fixed edgewise appliance and divided into three groups, according to the sequence in which premolars were extracted "Group 40" comprised 22 patients treated with extractions of the first two superior premolars, adopted as the control group; "Group 44" comprised 43 patients treated with extractions of the four first premolars; and "Group 45" comprised 22 patients treated with extractions of first superior premolars and second inferior premolars. The Holdaway analysis was used to quantify and compare the group profiles before and after treatment. RESULTS: Student's t-tests showed a profile improvement in all groups. When groups were compared, ANOVA showed that only the Inferior sulcus to the H line showed differences in incremental changes resulting from the treatment. Group 44 showed a significantly higher difference than Group 40. CONCLUSION: We conclude that the protocols produce similar facial appearances.

Susiane, Allgayer; Eduardo M. Santayana de, Lima; Maurício Barbieri, Mezomo.

254

Inferior oblique muscle thickness in Asians  

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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

Yasuhiro Takahashi

2008-06-01

255

Hepatocellular carcinomas supplied by inferior phrenic arteries  

International Nuclear Information System (INIS)

Purpose: To assess the arterial supply to hepatocellular carcinomas (HCCs) by inferior phrenic arteries (IPA). Material and Methods: A total of 126 consecutive cases of HCC were studied by contrast-enhanced CT and conventional arteriography. Blood supply from an IPA was suspected when the size of the HCC mass as seen on contrast-enhanced CT did not match the size of the tumor mass as seen on hepatic arteriography. Inferior phrenic arteriography was employed to confirm these findings. HCCs fed by the IPA were analyzed in terms of size, location, and history of prior treatment. Results: In 14 (11%) of the 126 cases, the tumor was found to have a blood supply from an IPA. Eleven of these tumors were located in segments 2 and 7. Three tumors, which had not been treated previously, had a blood supply from an IPA. Six tumors were almost exclusively fed by an IPA and were located in segments 7, 1, and 4. Conclusion: HCCs located in segments which form the bare area of the liver (S1, S2, S7) can be supplied by an IPA. This should be suspected when a lesion or part of a lesion is identified on contrast-enhanced CT but not on hepatic arteriography. (orig.)

1998-07-01

256

Orthodontic uprighting of severely impacted mandibular second molars.  

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The prevalence of impacted second molars is low, varying from 0% to 2.3%. The etiology of an impaction can involve systemic, local, and periodontal factors, as well as a developmental disruption of the tooth germ. A number of surgical and orthodontic treatment options have been suggested in the literature, including leaving the tooth in situ, removing the impacted second molar, orthodontic uprighting, and autotransplantation. Removal of third molars has been suggested as an adjunct for space creation. This article presents the treatment of a girl with bilateral severely impacted mandibular second molars as well as an ectopic maxillary left canine and severe crowding affecting both the maxillary and mandibular arches. Her treatment was successfully completed with fixed preadjusted edgewise appliances (0.022 × 0.028-in slot size) and MBT prescription (APC precoated Gemini Brackets; 3M Unitek, St. Paul, Minn), along with the removal of 4 first premolars. The maxillary left canine and the mandibular second molars were surgically exposed. The treatment mechanics show that even severely impacted second molars can be uprighted by routine straight-wire techniques, which are easy to apply. The center of rotation of the second molar lies in the bifurcation of the roots of this tooth, and this biomechanical property was used to its full advantage. The techniques applied comprised bracket repositioning, bypass of brackets, conversion of molar tubes to brackets, thermoelastic copper-nickel-titanium archwires, and a push-coil spring. Other orthodontic treatment mechanics, which require complex sectional or segmental techniques, auxiliaries, or artistic wire bending, that have been suggested in the literature were not used here. The third molars were not removed. PMID:23273367

Lau, Catherine K; Whang, Claudia Z Y; Bister, Dirk

2013-01-01

257

Agenesia da veia cava inferior / Agenesis of the inferior vena cava  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Agenesia da veia cava inferior é uma malformação rara. Sua causa mais comum é a disgenesia durante a embriogênese, mas também pode estar relacionada a trombose intrauterina ou perinatal. Normalmente é assintomática, em associação, ou não, com outras malformações congênitas, e pode cursar com maior r [...] isco de insuficiência venosa crônica e trombose venosa profunda, especialmente em jovens. Seu diagnóstico frequentemente é acidental, durante cirurgias abdominais ou procedimentos radiológicos. Relatamos cinco casos de agenesia da veia cava inferior detectada durante procedimentos eletrofisiológicos. Abstract in english Agenesis of the inferior vena cava is a rare malformation. Its most common cause is dysgenesis during embryogenesis, but it may also be related to intrauterine or perinatal thrombosis. It is usually asymptomatic, associated or not with other congenital malformations and may be related to increased r [...] isk of chronic venous insufficiency and deep vein thrombosis, especially in young individuals. Diagnosis is often incidental, during abdominal surgery or radiological procedures. We reported five cases of agenesis of the inferior vena cava detected during electrophysiological procedures.

Gensas, Caroline Saltz; Pires, Leonardo Martins; Kruse, Marcelo Lapa; Leiria, Tiago Luiz Luz; Gomes, Daniel Garcia; Lima, Gustavo Glotz de.

258

Revascularization/Regeneration performed in immature molars: case reports.  

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These 3 case reports the outcome of revascularization treatment in necrotic immature molars. During treatment, a tri antibiotic mix was used to disinfect the pulp for 2 weeks. Then a blood clot was created in the canal, over which mineral trioxide aggregate was placed. After 24 months, the immature molars showed continuation of root development. The patients were asymptomatic, no sinus tracts were evident and apical periodontitis was resolved Results from these cases show that revascularization/regeneration using 3Mix-MP method could be effective for managing immature permanent molar teeth with pulpal necrosis. PMID:23855165

Sönmez, I S; Akbay Oba, A; Erkmen Almaz, M

2013-01-01

259

Effects of Gates-Glidden, LA Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars  

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Full Text Available SciELO Brazil | Language: English Abstract in portuguese Este estudo avaliou o aumento da área do canal e a espessura de dentina na parede mesial e distal dos canais mesiais de molares inferiores após o uso de Gates Glidden (GG), La Axxess (LA), Orifice Shaper (OS). Um total de 53 canais mesiais de 27 molares inferiores foram incluídos em resina e dividid [...] os em 3 grupos. As raízes foram seccionados 3 mm abaixo da junção cemento-esmalte e as imagens foram capturadas antes e depois da instrumentação. O aumento da área do canal em percentagem e a espessura da dentina remanescente nas paredes mesial e furca foram calculados utilizando o software Image Tools. Os dados foram analisados utilizando o Kruskal-Wallis e teste de Dunn. O Nível de significância foi de 5%. Todos os instrumentos promoveram o aumento da área cervical, com diferentes quantidades de remoção da dentina nas paredes mesial e distal do canal radicular. Diferença estatística (p0,05) entre as paredes mesial e distal de todos os instrumentos analisados. O LA 35.06 e GG 3 mostraram a menor espessura da parede e sua utilização em canais mesiais de molares inferiores deve ser feito com cuidado. Abstract in english This study evaluated the increase of the instrumented area and dentin thickness in the mesial and distal aspects of mesial canals of mandibular molars after the use of Gates Glidden (GG), LA Axxess (LA) and Orifice Shaper (OS) instruments. A total of 53 canals from 27 mandibular molars were embedded [...] in resin and divided into 3 groups. The roots were sectioned 3 mm below the cementoenamel junction and the images were captured before and after instrumentation. The increase of the instrumented area in terms of percentages and the remaining dentin thickness, in mm, at the mesial and furcal aspects were calculated using the Image tools software. Data were analyzed using the Kruskal-Wallis and Dunn's test. The significance level was set at 5%. All instruments promoted cervical flaring with different amounts of dentin removal at the mesial and distal aspects of the root canals. Statistically significant difference (p0.05) was found between the mesial and distal walls in all groups. It may be concluded that LA 35.06 and GG 3 burs produced the thinnest dentin walls, and thus their use in mesial canals of mandibular molars should be done with caution.

Marco Antonio Hungaro, Duarte; Ricardo Affonso, Bernardes; Ronald, Ordinola-Zapata; Bruno Carvalho de, Vasconcelos; Clovis Monteiro, Bramante; Ivaldo Gomes de, Moraes.

260

An assessment on the effects of mandibular impacted third molar surgery on the periodontium of the adjacent molar  

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Full Text Available Statement of Problem: One of the important indications for the extraction of mandibular impacted third"nmolar is to preserve the periodontal health of the adjacent second molar from the destructive effects of"nplaque accumulation, acute and chronic inflammation."nAim: The purpose of this study was to determine the effect of mandibular third molar surgery on the"nPDL of the adjacent molar."nMaterials and Methods: Thirty patients, referred to the department of maxillofacial surgery, Tehran"nUniversity of Medical Sciences, were selected, based on the desirable conditions. They had no history of"nsystemic diseases and their adjacent molar was healthy. Probing depth (PD at seven points and"nattachment level (AL at three points were measured preoperatively. Standardized periapical"nradiographics were taken regularly for all patients. All the above-mentioned procedures repeated after"nthree months of surgery. Findings were analyzed by Paired t-test."nResults: A significant difference in probing depth (PD was observed before and after surgery, meaning"nthat probing depth decreased after mandibular third molar surgery. Attachment level was also decreased"npost operatively; moreover. Intrabony defects (IBD showed healing after surgery."nConclusion: Considering the limitations of the present study, impacted third molar surgery is suggested"nto prevent periodontal problems of the adjacent molar.

Ramezanian M

2003-06-01

 
 
 
 
261

Evaluation of the space available for eruption of maxillary second and third molars after distalization of maxillary first molars  

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Full Text Available Objective: The objective of this study was to evaluate cephalometrically the space available for eruption of maxillary second and third molars in the region of the maxillary tuberosity after distalization of maxillary permanent first molars.Material and methods: The sample consisted of 38 right lateral cephalograms obtained from 19 Brazilian patients,of Caucasian and African descent, with average age of 9 years and 5 months.Cephalograms were taken before and after distalization of maxillary permanent first molars. The space from the end of the maxillary tuberosity to the distal aspect of the maxillary permanent first molar was evaluated.Student’s t test was applied for the statistical analysis,and the correlation between space and angulation was analyzed by the Pearson correlation coefficient.Results and conclusion:The corresponding space between the distal aspect of maxillary permanent first molars and the end of the maxillary tuberosity, before and after distalization,is not enough for eruption of the maxillary second and third molars.The crowns revealed distal angulation before and after distalization.The correlation of angulation of crowns of maxillary second and third molars and the space for eruption revealed that the greater the distal angulation of crowns,the smaller will be the space available for eruption.

Francisco Alexandre Baptista da Silva

2010-07-01

262

Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers / Alteraciones Morfológicas de las Superficies de Esmalte y Dentina de Dientes Deciduos Irradiados con Láseres de Nd:YAG, C0(2) y Diodo  

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Full Text Available SciELO Chile | Language: English Abstract in spanish El estudio presenta algunos resultados del efecto del láser de C0(2), Nd:YAG y Diodo sobre el esmalte y dentina de dientes deciduos humanos. Después de las irradiaciones, se prepararon las muestras y se montaron sobre bases metálicas, cubiertas con oro y examinadas en el microscopio electrónico de b [...] arrido. Los resultados mostraron que la irradiación con el láser C0(2) en modo conmutado con 1,0 W de potencia, provoca fusión e irregularidades con pequeños cráteres en la superficie del esmalte. En la superficie de la dentina, el área irradiada se mostró circular y bien definido, con bloques de dentina y grietas. Con el uso del láser Nd: YAG en el modo pulsado con 1,0 W de potencia media y frecuencia de 10Hz, la superficie del esmalte presentó granulos de esmalte fundido, dándole el aspecto de "melting" (derretido). La superficie de dentina irradiada presentó un cráter con borde elevado con granulos y agujeros, y su fondo presentó túbulos dentinarios con glóbulos de dentina derretida. La irradiación del láser de Diodo en el modo conmutado con potencia media de 1,0 W, provocó la formación de una superficie de esmalte fusionada y resolidificada uniforme y la superficie de la dentina presentó un bloque de dentina fundida en la regiones adyacentes de dentina normal, mostrando una superficie bastante lisa. Abstract in english In this work, we studied the effects of C0(2), Nd:YAG and diode lasers on the enamel and dentin of deciduous human teeth. After the irradiations, the samples were duly prepared and set up on metallic bases, covered with gold and examined in the scanning electron microscope. The results showed that t [...] he irradiation with the C0(2) mode locked laser with 1.0 W power caused melting and irregularities with small cavities on the surface of the enamel. The irradiated area on the dentin surface appeared circular and well delimited, containing blocks of dentin and cracks. By using the pulsed Nd:YAG laser with 1.0 W mean power and 10 Hz frequency, the enamel surface presented granules of molten enamel, with a typical melting look. The irradiated dentin surface presented a cavity with a margin elevated with granules and holes, and its bottom presented dentinary tubules with globules of melted dentin. Irradiation with the mode locked of diode laser with 1.0 W mean power, showed the formation of a melted and evenly resolidified enamel surface, and the dentin surface presented a block of melted dentin with adjacent regions of normal dentin, evidently with a relatively smooth surface.

Mónica Rodrigues de, Souza; Ii-Sei, Watanabe; Luciane H, Azevedo; Edgar Y, Tanji.

263

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  

Directory of Open Access Journals (Sweden)

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 pero 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.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 racial 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.

Víctor Javier Beltrán Varas

2011-06-01

264

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)

Full Text Available SciELO Chile | Language: Spanish Abstract in spanish 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).

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

265

Apparent molar volumes and compressibilities of selected electrolytes in dimethylsulfoxide  

Energy Technology Data Exchange (ETDEWEB)

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.

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

266

Impaction of First Permanent Molars-Case Report.  

Science.gov (United States)

Occasionally, the extraction of an impacted tooth provides a clinical challenge for an oral surgeon. Any tooth may be impacted, but third molars and maxillary cuspids are most frequently encountered followed by premolars and supernumerary teeth. Various s...

P. S. Grover L. Lorton

1982-01-01

267

Molar extinction coefficient of fullerenes and related hydrogenated derivatives ``fulleranes''  

Science.gov (United States)

Fullerenes, the carbon molecules with 60 and 70 atoms, were recently detected in a series of planetary nebulae, in protoplanetary nebulae and in other astrophysical objects. The detection and the quantitative determination of these molecules was made possible by the measurement of their reference infrared spectra and the relative molar extinction coefficients and integrated molar absorptivity on laboratory scale. It is expected that also fulleranes the hydrogenated derivatives of C60 and C70 may be present in the same objects where fullerenes were detected. This prompted us to synthesize the hydrogenated fullerenes, to record their infrared spectra and the measure the molar extinction coefficients and integrated molar absorptivity on laboratory scale to have a reference in the search of these fullerene derivatives in space

Cataldo, Franco; Iglesias-Groth, Susana; Manchado, Arturo

2012-08-01

268

Molar incisor hypomineralization (MIH): clinical presentation, aetiology and management.  

Science.gov (United States)

In this paper, the current knowledge about Molar Incisor Hypomineralization (MIH) is presented. MIH is defined as hypomineralization of systemic origin of one to four permanent first molars frequently associated with affected incisors and these molars are related to major clinical problems in severe cases. At the moment, only limited data are available to describe the magnitude of the phenomenon. The prevalence of MIH in the different studies ranges from 3.6-25% and seems to differ in certain regions and birth cohorts. Several aetiological factors (for example, frequent childhood diseases) are mentioned as the cause of the defect. Children at risk should be monitored very carefully during the period of eruption of their first permanent molars. Treatment planning should consider the long-term prognosis of these teeth. PMID:15000003

Weerheijm, K L

2004-01-01

269

Leiomyosarcoma of the inferior vena cava: A case report  

Energy Technology Data Exchange (ETDEWEB)

A 29 year old woman with unresectable Leiomyosarcoma of the inferior vena cava extending into the right atrium of the heart was presented. The upper and middle inferior vena cava was involved and there were both intrinsic and extrinsic tumor growth components. The diagnosis was made by a combination of radiological studies including ultrasound, CT, inferior vena cavography and arteriography and the diagnosis was confirmed by ultrasound guided tumor biopsy. The clinical and radiological presenting features were reviewed.

Kim, Yong Soo; Kim, Jong Sung; Koh, Byung Hee; Seo, Heung Suk; Cho, On Koo [College of Medicine, Hanyang University, Seoul (Korea, Republic of)

1993-05-15

270

Leiomyosarcoma of the inferior vena cava: A case report  

International Nuclear Information System (INIS)

A 29 year old woman with unresectable Leiomyosarcoma of the inferior vena cava extending into the right atrium of the heart was presented. The upper and middle inferior vena cava was involved and there were both intrinsic and extrinsic tumor growth components. The diagnosis was made by a combination of radiological studies including ultrasound, CT, inferior vena cavography and arteriography and the diagnosis was confirmed by ultrasound guided tumor biopsy. The clinical and radiological presenting features were reviewed

1993-05-01

271

Obstruction of the hepatic portion of the inferior vena cava  

International Nuclear Information System (INIS)

Five patients with obstruction of the hepatic portion of the inferior vena cava diagnosed by digital subtraction inferior vena cavography were reported. All of these patients, aged from 38 to 52, were female who had never used the oral contraceptives. Main collateral pathway of these patients was the central channels through ascending lumbar veins, internal and external vertebral plexuses, azygos-hemiazygos complex, and inferior vena cava itself above the obstructed segment

1985-02-01

272

Obstruction of the hepatic portion of the inferior vena cava  

Energy Technology Data Exchange (ETDEWEB)

Five patients with obstruction of the hepatic portion of the inferior vena cava diagnosed by digital subtraction inferior vena cavography were reported. All of these patients, aged from 38 to 52, were female who had never used the oral contraceptives. Main collateral pathway of these patients was the central channels through ascending lumbar veins, internal and external vertebral plexuses, azygos-hemiazygos complex, and inferior vena cava itself above the obstructed segment.

Kim, Jong Deok; Choi, Han Chin [Inje Medical College, Paik Hospital, Pusan (Korea, Republic of)

1985-02-15

273

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)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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,

Liporaci Junior, Jorge Luiz Jacob.

274

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

Directory of Open Access Journals (Sweden)

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.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 eficacia 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.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 days 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 before surgery and, after the procedure, ketoprofen 150 mg was ad

Jorge Luiz Jacob Liporaci Junior

2012-08-01

275

Single Rooted Maxillary First Molar: A Rare Case  

Directory of Open Access Journals (Sweden)

Full Text Available Adequate knowledge of the root canal morphology and its variations is essential for successful endodontic treatment. Of all the permanent teeth, maxillary first molar has a wide variety of variations in the root canal morphology. One among the rarest variation is to have a single root with a single canal. This case report presents one such unusual variation in maxillary first molar.

Chikoy Wang,

2011-01-01

276

Genetic integration of molar cusp size variation in baboons  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Many studies of primate diversity and evolution rely on dental morphology for insight into diet, behavior, and phylogenetic relationships. Consequently, variation in molar cusp size has increasingly become a phenotype of interest. In 2007 we published a quantitative genetic analysis of mandibular molar cusp size variation in baboons. Those results provided more questions than answers, as the pattern of genetic integration did not fit predictions from odontogenesis. To follow up, we expanded o...

Koh, Christina; Bates, Elizabeth; Broughton, Elizabeth; Do, Nicholas T.; Fletcher, Zachary; Mahaney, Michael C.; Hlusko, Leslea J.

2010-01-01

277

C-shaped canals in mandibular second molars  

Digital Repository Infrastructure Vision for European Research (DRIVER)

Aims: This clinical report presents the endodontic treatment of two mandibular second molars with a C-shaped canal systems. Summary: According to the endodontic literature a C-shaped root canal is most frequently seen in mandibular second molar. Once recognised, the C-shaped canal is a challenge with respect to debridement and obturation. We observed this configuration in two of our cases and successfully treated them in the department of Conservative Dentistry and Endodontics, Kamineni Insti...

Ravichandra; Harikumar

2010-01-01

278

Iatrogenic Mandibular Fracture Associated with Third Molar Removal  

Directory of Open Access Journals (Sweden)

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.

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

2011-01-01

279

Use of sevoflurane inhalation sedation for outpatient third molar surgery.  

Digital Repository Infrastructure Vision for European Research (DRIVER)

This study attempted to determine if sevoflurane in oxygen inhaled via a nasal hood as a sole sedative agent would provide an appropriate level of deep sedation for outpatient third molar surgery. Twenty-four patients scheduled for third molar removal were randomly assigned to receive either nasal hood inhalation sevoflurane or an intravenous deep sedation using midazolam and fentanyl followed by a propofol infusion. In addition to measuring patient, surgeon, and dentist anesthesiologist subj...

1999-01-01

280

Congenital anomalies of the inferior vena cava  

International Nuclear Information System (INIS)

Congenital anomalies of the inferior vena cava (IVC) and its tributaries are increasingly recognized in asymptomatic patients due to the more frequent use of cross-sectional imaging and computed tomography (CT) in particular. IVC development is a complex process involving formation of anastomoses between three pairs of embryonic veins in the 4th to 8th week of gestation. Various permutations occur in the basic venous plan of the abdomen and pelvis resulting in variants such as isolated left IVC, double IVC, and retroaortic left renal vein. The majority of these anomalies are asymptomatic but occasionally present clinically with thromboembolic complications. However, awareness of their existence is important to avoid important diagnostic pitfalls and in preoperative surgical and interventional radiological planning.

2012-02-01

 
 
 
 
281

Percutaneous insertion of the inferior vena cava filter  

International Nuclear Information System (INIS)

Objective: To evaluate the effect of inferior vena cava filter for prevention of pulmonary embolus (PE) formation. Methods: Twenty-eight cases of deep venous thrombosis (DVT) were treated with insertion of the inferior vena cava filter. Results: The filter was implanted into inferior vena cava below the rena vein. There were no severe complications occurred in the group. Twenty-seven cases were followed up to 2-34 months, and no migration of the filters were found. And no pulmonary embolism were revealed in fifteen cases without pulmonary thromboembolism. Conclusions: The inferior vena cava filter implantation is a safe and effective method to prevent pulmonary thromboembolism

2000-05-01

282

A bracket design proposal for the first molar  

Directory of Open Access Journals (Sweden)

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.

Roberto Scalon

2010-07-01

283

Standard molar enthalpies of formation of some vinylfuran derivatives  

International Nuclear Information System (INIS)

The standard (p0 = 0.1 MPa) molar enthalpies of combustion, ?cHm0, 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, ?cr,lgHm0, 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, ?crgHm0, 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 (p0 = 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

2009-03-01

284

Outcome of molar pregnancies in Malaysia: a tertiary centre experience.  

Science.gov (United States)

Gestational trophoblastic disease (GTD) is a common problem among Asian ethnics. A total of 102 women with molar pregnancies between 1 January 2005 and 31 December 2010, were analysed. The aim of the study was to determine the outcome of all molar pregnancies in our institution. The local incidence of molar pregnancy was 2.6 per 1,000 deliveries. A total of 48 women (47.1%) had complete hydatidiform mole and another 54 (52.9%) had partial mole. The mean age of the women with molar pregnancies was 32.0 ± 7.9 years. The mean gestational age at initial diagnosis was 11 weeks ± 3 days. The majority (97 women, 95.1%) had symptoms of vaginal bleeding and 18 (17.6%) women had a uterus larger than dates. A total of 48 (47.1%) women had ultrasound scan findings of 'snow-storm' appearance. None of the women with uncomplicated molar pregnancy had evidence of relapse following one undetectable serum ?-hCG level. Four out of the 102 women (3.9%) developed persistent trophoblastic disease before attaining one undetectable serum ?-hCG level. All four women required single agent methotrexate and they remained in remission. The prognosis for uncomplicated molar pregnancy is good. Establishment of a National Trophoblastic Centre is recommended to maintain optimal outcome. PMID:23445147

Nirmala, C K; Nor Azlin, M I; Harry, S R; Lim, P S; Shafiee, M N; Nur Azurah, A G; Omar, M H; Hatta, M D

2013-02-01

285

Avaliação radiográfica do espaço disponível para os terceiros molares superiores  

Directory of Open Access Journals (Sweden)

Full Text Available A quantidade óssea no túber da maxila está intimamente ligada com a erupção dos terceiros molares superiores. O principal objetivo desta pesquisa é verificar o espaço disponível no arco para a erupção dos terceiros molares superiores. A amostra foi composta por 50 telerradiografias em norma lateral, com média de 15 anos de idade (variação de12 a 18 anos. O método proposto avaliou a distância da face distal dos segundos molares superiores até o fim da tuberosidade da maxila, que também coincide com o processo alveolar da maxila, assim sendo, teremos o espaço disponível para a erupção dos terceiros molares superiores. Pode-se observar que existe uma falta de espaço para a correta irrupção dos terceiros molares superiores, uma vez que o espaço disponível médio é de 6,18mm e o espaço requerido médio é de 9,42mm. A discrepância média para a amostra estudada, no momento da obtenção das telerradiografias em norma lateral foi negativa -3,24mm. A região do túber é pobre em espaço para erupção dos terceiros molares superiores.

Francisco Alexandre Baptista da Silva

2007-01-01

286

PERFORATION OF INFERIOR ALVEOLAR NERVE BY MAXILLARY ARTERY. LA PERFORACION DEL NERVIO ALVEOLAR INFERIOR POR LA ARTERIA MAXILAR  

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Infratemporal fossa is clinically important anatomical area for the delivery of local anesthetic agents in dentistry and maxillofacial surgery. Variations in the anatomy of the inferior alveolar nerve and maxillary artery were studied in infratemporal dissection. During routine dissection of the head in an adult male cadaver an unusual variation in the origin of the inferior alveolar nerve and its relationship with the surrounding structures was observed. The inferior alveolar nerve originate...

2011-01-01

287

Retroperitoneal arteriovenous malformation extending through the inferior vena cava into the heart and causing inferior vena cava dissection  

International Nuclear Information System (INIS)

We present a case of retroperitoneal arteriovenous malformation extending through the inferior vena cava into the heart, which was associated with dissection of the inferior vena cava in a 32-year-old female. Computed tomography and magnetic resonance imaging showed a double-lumen inferior vena cava and a rod-like solid component attached to a sac-like lesion in the right heart chambers. Digital subtraction angiography showed an arteriovenous malformation draining to the inner lumen of the inferior vena cava. (orig.)

2005-06-01

288

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

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Full Text Available 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.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 exodontia 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.

José Eduardo Ferreira Manso

2011-01-01

289

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

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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.

No-Cortes, Juliana; Cavalcanti, Marcelo Gusmao Paraiso; Arita, Emiko Saito

2014-01-01

290

Estudo in vitro da resistência ao cisalhamento da colagem direta de tubos ortodônticos em molares / In vitro study of shear bond strength in direct bonding of orthodontic molar tubes  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese INTRODUÇÃO: apesar da colagem direta despender menor tempo clínico, com maior preservação da integridade gengival, ainda hoje se observa uma alta incidência de bandagem dos molares. Portanto, torna-se interessante a idealização de recursos para o aumento da eficiência desse procedimento para dentes [...] submetidos a maiores impactos mastigatórios, como, por exemplo, os molares. OBJETIVO: esse estudo teve o propósito de avaliar se a resistência à adesão com a aplicação de uma camada de resina adicional na região oclusal da interface tubo/dente aumenta a qualidade do procedimento de colagem direta de tubos em molares. MÉTODOS: selecionou-se uma amostra composta por 40 terceiros molares inferiores, que foram aleatoriamente divididos em 2 grupos: Grupo 1 - colagem direta convencional, seguida pela aplicação de uma camada de resina na oclusal da interface tubo/dente; e Grupo 2 - colagem direta convencional. O teste de resistência ao cisalhamento foi realizado 24 horas após a colagem, utilizando-se uma máquina de ensaio universal, operando a uma velocidade de 0,5mm/min. Os resultados foram analisados por meio do teste t independente. RESULTADOS: os valores médios obtidos nos testes de cisalhamento foram: 17,08MPa para o Grupo 1 e 12,60MPa para o Grupo 2. O Grupo 1 apresentou uma resistência ao cisalhamento estatisticamente significativa mais alta do que o Grupo 2. CONCLUSÃO: a aplicação de uma camada adicional de resina na oclusal da interface tubo/dente aumenta a qualidade da adesão do procedimento de colagem direta de tubos ortodônticos em molares. Abstract in english OBJECTIVE: Although direct bonding takes up less clinical time and ensures increased preservation of gingival health, the banding of molar teeth is still widespread nowadays. It would therefore be convenient to devise methods capable of increasing the efficiency of this procedure, notably for teeth [...] subjected to substantial masticatory impact, such as molars. This study was conducted with the purpose of evaluating whether direct bonding would benefit from the application of an additional layer of resin to the occlusal surfaces of the tube/tooth interface. METHODS: A sample of 40 mandibular third molars was selected and randomly divided into two groups: Group 1 - Conventional direct bonding, followed by the application of a layer of resin to the occlusal surfaces of the tube/ tooth interface, and Group 2 - Conventional direct bonding. Shear bond strength was tested 24 hours after bonding with the aid of a universal testing machine operating at a speed of 0.5mm/min. The results were analyzed using the independent t-test. RESULTS: The shear bond strength tests yielded the following mean values: 17.08 MPa for Group 1 and 12.60 MPa for Group 2. Group 1 showed higher statistically significant shear bond strength than Group 2. CONCLUSIONS: The application of an additional layer of resin to the occlusal surfaces of the tube/tooth interface was found to enhance bond strength quality of orthodontic buccal tubes bonded directly to molar teeth.

Vercelino, Célia Regina Maio Pinzan; Pinzan, Arnaldo; Gurgel, Júlio de Araújo; Bramante, Fausto Silva; Pinzan, Luciana Maio.

291

Intravenous Uterine Leiomyomatosis with Inferior Vena Cava and Intracardiac Extensions  

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Intravenous leiomyomatosis originating from the uterus and involving the right ventricle, right atrium, inferior vena cava and iliac veins is an uncommon disease. We report here on a leiomyomatosis in a 35-year-old woman who presented with tumors in her heart and inferior vena cava. The correct diagnosis was achieved by using the transthoracic echocardiographic, cardiac CT and pelvic MRI findings.

Kim, Dong Hun; Seo, Hye Sun; Cho, Yoon Haeng; Kim, Hee Kyung [Soonchunhyang University Hospital, Bucheon (Korea, Republic of); Suk, Eun Ha [Asan Medical Center, Seoul (Korea, Republic of)

2009-04-15

292

The clinical application of inferior vena caval CO2-DSA  

International Nuclear Information System (INIS)

Objective: To explore the feasibility and safety of inferior vena caval CO2-DSA and evaluate the results of inferior vena cavography using CO2-DSA or iodinated contrast media. Methods: 25 patients diagnosed as deep venous thrombosis of lower limb were prepared to conceive the implantation of inferior vena caval filter. The inferior vena cava and right renal vein CO2-DSA and iodinated contrast media DSA were carried out through jugular or femoral vein approach in all patients. Results: The inferior vena caval angiography with CO2-DSA or iodinated contrast media were carried out successfully in all patients. The quality of the inferior vena caval angiogram showed: with CO2 as contrast media, 14 cases obtained excellent images and 11 cases had good images; with iodinated contrast media the images of 18 cases were excellent and 7 cases were good. No thrombus and variation of inferior vena cava were found by the two kinds of angiography. The diameter of inferior vena cava showed: (20.01 ± 0.83) mm with CO2 contrast media and (20.15 ± 0.92) mm with iodinated contrast media, (P=0.006); having statistical significance between them. The safety of angiography with CO2 presented only 1 case with transient slight decrease of O2 saturation. No abnormal changes were found in blood pressure, heart rate and so on. Conclusions: Inferior vena caval CO2-DSA is feasible and safe, with statistical significance in the measurement of inferior vena caval diameter comparing with iodinated contrast material but with no influence on the implantation of filter. (authors)

2007-08-01

293

Thiomers: influence of molar mass on in situ gelling properties.  

Science.gov (United States)

The aim of this study was to investigate the influence of molar mass of thiolated polymers (thiomers) on their in situ gelling properties. Chitosan-thioglycolic acid (chitosan-TGA) and pectin-cysteine (pectin-Cys) of increasing molar mass were chosen to produce in situ gels in combination with carbamide peroxide. Low molar mass chitosan (~2 kDa) was prepared by oxidative degradation with NaNO(2), whereas pectin was depolymerized by heat treatment. Thiomers, displaying 1271-1616 ?mol (chitosan-TGA) and 305-403 ?mol (pectin-Cys) free thiol groups per gram polymer, were synthesized via amide bond formation mediated by a carbodiimide. The results showed that a reduction of molar mass combined with increased concentrations of both cationic chitosan-TGA and anionic pectin-Cys leads to higher final viscosities and to a higher relative increase in viscosity within 60 min and 180 min, respectively. Using this method, the dynamic viscosity of a very low molar mass chitosan-TGA (~2 kDa) could be increased 100,000-fold within 60 min and 390,000-fold within 180 min. In view of these in situ gelling properties carbohydrate thiomers might be useful for various pharmaceutical applications such as vehicle for drug delivery or as wound dressing material. PMID:22683454

Hintzen, Fabian; Laffleur, Flavia; Sarti, Federica; Shahnaz, Gul; Bernkop-Schnürch, Andreas

2012-10-15

294

Iatrogenic displacement of impacted third molar. Case report  

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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.

Konstantinos TSIKLAKIS

2013-08-01

295

Uterine rupture following incomplete molar pregnancy: a case report  

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Full Text Available Background: In molar pregnancy, when hydatidiform changes are local and some embryonic components are observed, the term of partial mole is used. The risk of persistent trophoblastic tumor after partial mole is much lower than complete mole. In this persistent cases almost all are non metastatic. The aim of this study is to report a case of uterine rupture following incomplete molar pregnancy.Case presentation: The patient was a 26 year old woman with obstetric history of an abortion and one molar pregnancy and no child. She was referred to emergency unit in Ghaem University Hospital, Mashhad, Iran in May 2011. She had an evacuation curettage following molar pregnancy three months before and without any follow up visit. The patient was referred to emergency unit with hemorrhagic shock. She immediately underwent laparotomy. The uterine fundal rupture was repaired and evacuation curettage performed. In post operative evaluation, she had a nine millimeter metastatic nodule in base of right Lung. As a patient in low risk stage III, she received weekly intramuscular methotrexate (40mg/m2 for six courses. In follow up visit ?-hCG titer was negative (<10miu/ml at 5th week. Conclusion: In cases of in complete molar pregnancy risk of metastasis is very low. Serial beta-hCG titer is the most accurate method for detection of persistent gestational trophoblastic disease (GTN. In neglected cases like this case preservation of ruptured uterus in GTN is possible.

Pourali L

2013-03-01

296

Occlusal morphology of mandibular second molars in Iranian adolescents  

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Full Text Available Context: During human evolution, the morphology of mandibular molar occlusal surface has changed from pattern "y" to pattern "+". Six types of occlusal patterns were classified as: +4, 4-y,+5, 5-y,+6 and 6-y. Aims: To determine the prevalence of these six types of mandibular second molars in Iranian adolescents. Settings and Design: This descriptive investigation was undertaken in the high schools of Isfahan city, Iran. The students were selected by cluster sampling method, and then they were screened and only those with erupted mandibular second molars bilaterally were selected. Materials and Methods: A total of 794 cases were randomly selected and the number of cusps and groove pattern of mandibular second molar were examined intra-orally and by studying dental casts. Statistical Analysis Used: Descriptive statistics and chi-square test were used for data analysis. Results: The most frequent occlusal configuration was the "+4" form (76.9%. A total of 683 cases (86% were found to have four-cusp form, 104 cases (13.1% were five-cusp form and 7 cases (0.9% were six-cusp form. Conclusion: The most frequent occlusal configuration was the "+4" form; thus, there is a high evolutionary trend in Iranian mandibular second molars.

Mosharraf Ramin

2010-01-01

297

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

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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.

Fernando Alcides José de Souza

2008-01-01

298

Adaptive global synchrony of inferior olive neurons  

International Nuclear Information System (INIS)

This paper treats the question of global adaptive synchronization of inferior olive neurons (IONs) based on the immersion and invariance approach. The ION exhibits a variety of orbits as the parameter (termed the bifurcation parameter), which appears in its nonlinear functions, is varied. It is seen that once the bifurcation parameter exceeds a critical value, the stability of the equilibrium point of the ION is lost, and periodic orbits are born. The size and shape of the orbits depend on the value of the bifurcation parameter. It is assumed that bifurcation parameters of the IONs are not known. The orbits of IONs beginning from arbitrary initial conditions are not synchronized. For the synchronization of the IONs, a non-certainty equivalent adaptation law is derived. The control system has a modular structure consisting of an identifier and a control module. Using the Lyapunov approach, it is shown that in the closed-loop system, global synchronization of the neurons with a prescribed relative phase is accomplished, and the estimated bifurcation parameters converge to the true parameters. Unlike the certainty-equivalent adaptive control systems, an interesting feature of the designed control system is that whenever the estimated parameters coincide with the true values, the parameter estimates remain frozen thereafter, and the closed-loop system recovers the performance of the deterministic closed-loop system. Simulation results are presented which show that in the closed-loop system, the synchrony of neurons with prescribed phases is accomplished despite the uncertainties in the bifurcation parameters.

2009-09-01

299

The obliquus capitis inferior myodural bridge.  

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This study was designed to examine the obliquus capitis inferior (OCI) muscle from a gross anatomical perspective. The objective was to isolate and identify the OCI myodural bridge, while examining its course and contributing elements. An earlier study of the posterior cervical spine briefly reported a connection between the OCI and the cervical dura mater. To the best of our knowledge, a study has not yet been conducted specifically on this muscle and its relation to the dura mater. In this study, the suboccipital regions of nine embalmed cadavers were dissected. A total of 14 OCI muscles were isolated for examination. All findings were documented via photograph. Of the 14 OCI muscles isolated, all emitted fibrous tissue bands from the anterolateral portion of the muscular belly. These fibers attached to the posterolateral cervical dura mater by route of the atlantoaxial interspace. The OCI myodural bridge appeared to coalesce with the rectus capitis posterior major myodural bridge, giving the appearance of a single atlantoaxial structure that links these two muscles to the dura mater. In conclusion, the OCI was attached to the dura mater in all of the 14 muscle specimens. We hypothesize that the OCI myodural bridge may play a physiological role in monitoring dural tension and preventing dural infolding. It may also contribute to certain clinical symptoms manifesting from alterations in dural tone. PMID:22836789

Pontell, Matthew E; Scali, Frank; Marshall, Ewarld; Enix, Dennis

2013-05-01

300

'Pseudothrombus' of the inferior vena cava  

International Nuclear Information System (INIS)

Normal Inferior Vena Cava (IVC) of 15 cases were studies on CT with bolus injection in the foot vein.FWell dilated IVC were obtained on scan both at full-inspiration and full-expiration. As the normal findings of IVC, different opacification patterns which may be designate ''homogenous'', ''layered'' and ''pseudothrombus'' were obtained. The ''homogenous'' opacification was noted both at full-inspiration and full-expiration. In homogenous patterns as noted as ''layered'' and ''pseudothrombus'' were suspected to occur in the case of insufficient mixing of contrast agent with blood and/or insufficient amount of contrast agent. And both these patterns were observed in dilated IVC. The ''layered'' opacified IVC was shown on scan at full-inspiration at which respiratory phase the blood flow in IVC may decrease.FThe ''pseudothrombus'' pattern was generally noted at full-expiration at which the blood flow may increase.FAlthough bolus injection of contrast agent into foot vein is useful for evaluation of IVC, one shound be aware of normal opacification of IVC including ''pseudothrombus'' pattern. (author)

1983-01-01

 
 
 
 
301

Leiomyosarcoma of the inferior vena cava.  

Science.gov (United States)

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

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

2014-05-01

302

Variations in impacted mandibular permanent molars: Report of three rare cases  

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The impaction of permanent teeth is not uncommon, but few permanent teeth are rarely impacted like mandibular first and second molars. Though third molars are commonly impacted, inversely impacted mandibular third molars are very rare. Here, we report three unusual cases of impacted mandibular molars accidentally diagnosed on conventional radiographs.

Joshi, Manjiri; Kasat, Vikrant

2011-01-01

303

Agenesia de veia cava inferior associada à trombose venosa profunda Agenesis of inferior vena cava associated with deep venous thrombosis  

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Full Text Available A agenesia da veia cava inferior é uma anomalia congênita rara, que foi recentemente identificada como um importante fator de risco para o desenvolvimento e a recorrência de trombose venosa profunda de membros inferiores em jovens. O objetivo deste trabalho foi relatar o caso de uma paciente que apresentou trombose venosa profunda dois meses após a realização de cirurgia de varizes. A angiotomografia computadorizada demonstrou a presença de anomalia venosa complexa com ausência da veia cava inferior.The agenesis of the inferior vena cava is a rare congenital anomaly, which was recently identified as an important risk factor for the development and recurrence of deep venous thrombosis especially in young people. The goal of this work was to report the case of a patient who presented deep venous thrombosis approximately two months after varicose vein surgery. The computerized angiotomography demonstrated the presence of a complex venous anomaly with absence of the inferior vena cava.

Clovis Luis Konopka

2010-09-01

304

Efficacy of Postoperative Prophylactic Antibiotic Therapy in Third Molar Surgery  

Science.gov (United States)

Introduction: Surgical extraction of mandibular third molar is the most frequently performed procedure in oral surgery. This procedure is associated with significant postoperative sequelae such as trismus, swelling, pain and infection. The need of antibiotic therapy during the removal of mandibular third molar has been a contentious issue. Method: This study investigated a regimen by using amoxycillin and metronidazole in one group and without using antibiotics in the other. Both the groups were assessed postoperatively on the 1st, 2nd, 5th, 7th and 10th days by the same observer for post operative mouth opening (interincisal distance), presence of a purulent discharge at the site of surgery, pain and swelling. Result: Overall, no statistically significant difference was seen between both the treatment groups when interincisal distance, pain, swelling and purulent discharge were considered. Conclusion: The results of this study failed to show any advantage which was associated with the routine postoperative use of antibiotics in asymptomatic third molar surgeries.

Reddy B, Praveen

2014-01-01

305

A NOVEL TREATMENT APPROACH FOR EXTRUDED MAXILLARY MOLAR  

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Full Text Available Two approaches are currently used to correct overerupted/extruded posterior teeth, the “prosthodontic” and the “orthodontic” one. This report presents a novel orthodontic approach for selective molar intrusion. In two females (26 and 20 years, a modified transpalatal arch (TPA, equivalent to a couple with a 30 g net force was used to move the tooth bodily. A 50 g force was applied to the overerupted maxillary second molar by means of a short length elastomeric chain from the helix to the palatal sheath and replaced every three weeks. Sufficient intrusion of the maxillary second molar was obtained within two months. For intrusion of a single tooth, a modified TPA together with a short length elastomeric chain is a non-invasive and cost-effective alternative to traditional edgewise mechanics, temporary anchorage devices, or removable appliances.

Julia Elodie Vlachojannis

2011-08-01

306

[Dentoalveolar surgery for the dentist: removal of third molar].  

Science.gov (United States)

In contrast to removal of other teeth and roottips, a third molar is mostly removed for preventive reasons. There is still debate about the correct indications for removal of third molars. As soon as the decision to remove a third molar surgically is made, the dentist has to decide between performing the surgical procedure himself or referring the patient to an oral and maxillofacial surgeon. Level of difficulty of the treatment and experience, available time, availability for postoperative care, and personal interest of the dentist are issues influencing this decision. This article describes systematically the indications, for instance using preoperative radiodiagnostics, the factors determining the technical surgical plan, as well as the practical surgical procedures. PMID:15129558

Jansma, J; Schoen, P J; Raghoebar, G M; Vissink, A

2004-04-01

307

Sonographic 'molar tooth' sign in the diagnosis of Joubert syndrome.  

Science.gov (United States)

The characteristic imaging finding common to Joubert syndrome and related disorders is the 'molar tooth' sign. The prenatal diagnosis of Joubert syndrome using both ultrasound and fetal magnetic resonance imaging (MRI) in families with an affected child has been reported previously. We report two cases in which the molar tooth sign was identified by sonography at 26 + 4 weeks and at 20 + 6 weeks, respectively, prior to fetal MRI or genetic testing. In both cases the finding was subsequently confirmed on fetal MRI. As definitive prenatal genetic testing may not be conclusive in Joubert syndrome, the ability to identify the molar tooth sign sonographically before 24 weeks provides a valuable adjunct to prenatal diagnosis. PMID:21370303

Pugash, D; Oh, T; Godwin, K; Robinson, A J; Byrne, A; Van Allen, M I; Osiovich, H

2011-11-01

308

C-shaped canals in mandibular second molars  

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Full Text Available Aims: This clinical report presents the endodontic treatment of two mandibular second molars with a C-shaped canal systems. Summary: According to the endodontic literature a C-shaped root canal is most frequently seen in mandibular second molar. Once recognised, the C-shaped canal is a challenge with respect to debridement and obturation. We observed this configuration in two of our cases and successfully treated them in the department of Conservative Dentistry and Endodontics, Kamineni Institute of Dental Sciences. Key learning points: C-shaped root canal morphology occurs mostly in mandibular second molars in Asian population. Thorough knowledge of the root canal anatomy is necessary to perform a successful endodontic treatment.

Ravichandra

2010-04-01

309

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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.

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

310

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

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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.

Paulo Puglia Jr.

2008-06-01

311

The chronology of third molar eruption in the Croatian population.  

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Dental age estimation is common in orthodontics, paedodontics, paleodontology and forensic dentistry. The aim of this study was to assess chronological course of eruptive developmental phases of third molar and to establish parameters for the Croatian population. Sample of this study consisted of 1249 orthopantomograms of 530 (42.4%) male and 719 (57.6%) female subjects, aged 10 to 25 years. Eruptive phases were classified in 4 stages. No significant sex difference was found. Established chronology of the third molar eruption can be used as a standard for the assessment of dental age in clinical and forensic research on samples of Croatian population. PMID:21755702

Brki?, Hrvoje; Vodanovi?, Marin; Dumanci?, Jelena; Lovri?, Zeljka; Cukovi?-Bagi?, Ivana; Petrovecki, Mladen

2011-06-01

312

Correlations between elastic moduli and molar volume in metallic glasses  

International Nuclear Information System (INIS)

We report clear correlations between bulk modulus (K) and average molar volume Vm, and between Poisson's ratio ? and Vm for various bulk metallic glasses. The origin for the correlations between elastic moduli and Vm are discussed. The established correlation, associated with Poisson's ratio ?, and since the ? correlates with plasticity of metallic glasses, indicates that the average molar volume is important factor to be considered for plastic metallic glasses searching. The found correlations also suggest a close relation between the mechanical properties and the short-range atomic bonding, and assist in understanding deformation behavior in metallic glasses

2009-03-23

313

Roentgenologic appearance of left-sided inferior vena cava  

International Nuclear Information System (INIS)

2 Cases of left-sided inferior vena cava, and 2 cases of left-sided inferior vena cava with azygos and hemiazygos continuation were evaluated with computed tomography and other roentgenologic procedures and discussed thier clinical and radiological significance. Left-sided inferior vena cava with azygos (hemiazygos) continuation is often associated with cyanotic or acyanotic congenital heart disease and abnormalities of cardiovascular position, abdominal situs and polysplenia. But, single left-sided inferior vena cavas have little tendency having associated anomalies. Both venous anomalies also shuld be embryologically differentiated, namely, failure of development of the lower portion of the supracardinal veins results in infrahepatic interruption of inferior vena cava with azygos continuation, persistence of the left cardinal system and atrophy of the right system lead to the left-side inferior vena cava. Knowledge of inferior vena cava anomalies is important to the radiologist in order to differentiate between venous anomalies and an enlarged lymph nodes in a patient with malignant tumor. (author)

1985-01-01

314

The inferior glenohumeral ligament: a correlative investigation.  

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The inferior glenohumeral ligament (IGHL) was investigated by correlating the biomechanical properties, biochemical composition, and histologic morphology of its 3 anatomic regions (superior band, anterior axillary pouch, and posterior axillary pouch) in 8 human cadaveric shoulders. The overall biochemical composition of the IGHL appeared similar to other ligaments, with average water content of 80.9 +/- 2.5%, collagen content of 80.0 +/- 9.2%, and crosslinks of 0.715 +/- 0.13 mol/mol collagen. The proteoglycan content was highest in the superior band (2.73 +/- 0.7 mg/g dry weight) and may, in part, explain its viscoelastic behavior. Histologic analysis demonstrated longitudinally organized fiber bundles that were more uniform in the mid-substance but more interwoven and less uniformly oriented near the insertion sites. The superior band had the most pronounced fiber bundle interweaving, while crimping was more evident in the anterior axillary pouch. Elastin was identified in each of the regions. Tensile testing demonstrated a trend toward higher ultimate tensile stress (16.9 +/- 7.9 MPa) and tensile modulus (130.3 +/- 47.9 MPa) in the superior band compared to the axillary pouch. The mean ultimate tensile strain of the IGHL was 16.8 +/- 4.6%. These complex IGHL properties may help to explain its unique functions in stabilizing the shoulder in different arm positions and at different rates of loading, including the failure patterns seen clinically, as in Bankart lesions (insertion site) versus capsular stretching (ligament substance). PMID:16963285

Ticker, Jonathan B; Flatow, Evan L; Pawluk, Robert J; Soslowsky, Louis J; Ratcliffe, Anthony; Arnoczky, Steven P; Mow, Van C; Bigliani, Louis U

2006-01-01

315

MR venography of the inferior mesentery vein  

International Nuclear Information System (INIS)

Objective: To evaluate on three-dimensional (3D) dynamic contrast-enhanced (DCE) MR venography (MRV), the visibility of the inferior mesenteric vein (IMV), its insertion pattern into the portal system, and the difference of IMV diameters between healthy subjects and patients with cirrhosis. Materials and methods: Two hundred and seventeen consecutive patients who had abdominal 3D DCE MRI was included in this study. The original image data of 3D DCE MRI was used to generate multiple planar volume reconstruction (MPVR) images, which were evaluated for visualization of the IMV and its pattern of insertion into the portal system. The diameter of IMV was measured and compared in 24 patients with cirrhosis (Cirrhosis Group) and in 30 patients without hepatic lesions or liver disease (Healthy Group). Results: In the 217 patients, the frequencies of visualization of IMV, grade 1 order branches and grade 2 order branches were, respectively, 88%, 24% and 9%. The IMV inserted into the splenic vein (SV), the portal confluence and the superior mesenteric vein (SMV) in 45%, 18% and 37%, respectively. Among patients with cirrhosis, 12.5% had IMV diameter larger than 5.1 mm, although there was no significant difference between cirrhosis and healthy groups (P > 0.05). However, the diameters of the main portal vein (MPV), SV and SMV were significantly larger in the Cirrhosis Group (P < 0.05). Conclusion: The IMV and its branches can be depicted well by 3D DCE MRV. The most common insertion of the IMV is into the splenic vein. A minority of patients with cirrhosis had dilatation of the IMV

2007-10-01

316

MR venography of the inferior mesentery vein  

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Objective: To evaluate on three-dimensional (3D) dynamic contrast-enhanced (DCE) MR venography (MRV), the visibility of the inferior mesenteric vein (IMV), its insertion pattern into the portal system, and the difference of IMV diameters between healthy subjects and patients with cirrhosis. Materials and methods: Two hundred and seventeen consecutive patients who had abdominal 3D DCE MRI was included in this study. The original image data of 3D DCE MRI was used to generate multiple planar volume reconstruction (MPVR) images, which were evaluated for visualization of the IMV and its pattern of insertion into the portal system. The diameter of IMV was measured and compared in 24 patients with cirrhosis (Cirrhosis Group) and in 30 patients without hepatic lesions or liver disease (Healthy Group). Results: In the 217 patients, the frequencies of visualization of IMV, grade 1 order branches and grade 2 order branches were, respectively, 88%, 24% and 9%. The IMV inserted into the splenic vein (SV), the portal confluence and the superior mesenteric vein (SMV) in 45%, 18% and 37%, respectively. Among patients with cirrhosis, 12.5% had IMV diameter larger than 5.1 mm, although there was no significant difference between cirrhosis and healthy groups (P > 0.05). However, the diameters of the main portal vein (MPV), SV and SMV were significantly larger in the Cirrhosis Group (P < 0.05). Conclusion: The IMV and its branches can be depicted well by 3D DCE MRV. The most common insertion of the IMV is into the splenic vein. A minority of patients with cirrhosis had dilatation of the IMV.

Zhang Xiaoming [Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong, Sichuan 637000 (China)], E-mail: zhangxm@nsmc.edu.cn; Zhong Tangli [Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong, Sichuan 637000 (China)], E-mail: zhongtls@163.com; Zhai Zhaohua [Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong, Sichuan 637000 (China)], E-mail: zhaizhaohuada@163.com; Zeng Nanlin [Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Wenhua Road 63, Nanchong, Sichuan 637000 (China)], E-mail: znl99@163.com

2007-10-15

317

Evaluation of superior-inferior position of mandibular canal and its anatomic variations on panoramic radiographs in patients over 18 referring to Khorasgan Dental School  

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Full Text Available Introduction: Attention to the location and the shape of mandibular canal is necessary to prevent problems during mandibular surgeries. This study was determined the prevalence of superior-inferior position of mandibular canal and its anatomic variations on panoramic radiographs in patients over 18 referring to Khorasgan Dental School.Materials and methods: In this descriptive-analytical study 260 radiographs were examined for variations in the position of mandibular canal. The subjects’ personal data, type of mandibular canal regarding its position based on Nortje‘s classification (high, low or intermediate position in relation to the apex of the first molar root and inferior border of the mandible, the distance from the superior border of lingula to the center of the ramus, existence of bifid canal and its shape and side and existence of anesthesia problems or impacted teeth on the same side as the bifid canal, were recorded. Data was analyzed by SPSS 10, using chi-squared test (?=0.05.Results: The most common canals in relation to their position relative to the first molar area, in descending order, were canals in middle position (55.8%, in the low position (35%, and in the high position (9.2%, respectively. No statistically significant differences were observed between the frequency distributions of canal positions (p value = 0.14%. The average distances from the superior border of lingula to the center of the ramus, in low position, middle position, and high position canals were 10.7, 11.35, and 10.87 mm, with no statistically significant differences (p value = 0.14. Conclusion: According to the results, there were no statistically significant differences between the frequency distributions of different positions of mandibular canals in relation to the root apex of the first molar and also between the distances from the lingual to the center of the ramus. Similar studies using CT scan technique are recommended. Key words: Inferior alveolar nerve, Mandible, Panoramic radiography.

Roshanak Ghafari

2011-01-01

318

MDCT of inferior mesenteric vein: normal anatomy and pathology  

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Multidetector computed tomography (MDCT) is a useful technique for imaging the inferior mesenteric vein. The aim of the present review was to discuss the normal anatomy and the pathologies of the inferior mesenteric vein, including partial or total thrombosis secondary to inflammation (pyophlebitis) and malignancy, occlusion, dilatation and reversed flow, which are rarely encountered. Optimal reconstruction techniques are also discussed. The pathologies of the inferior mesenteric vein can be clearly demonstrated using MDCT using curved-planar reformatted multiplanar reconstruction (MPR) and minimum intensity projection (MIP) images

2008-07-01

319

Inferior vena cave filter placement: summary of 96 cases  

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Objective: To investigate the effects of filter placement for inferior vena cava in prevention of fatal pulmonary embolism (PE)and the treatment of postoperative complications. Methods: Inferior vena cava filters were placed in 96 patients by the way of femoral vein. Results: All the patients were followed up for 4-36 months after the procedure without fatal pulmonary embolism occurrence in the 96 patients, but with only 17 correlated complications. Conclusion: Inferior vena cava filter placement is easy and safe which can prevent the high complication incidence of fatal pulmonary arterial embolism with further more effective prevention and management of other correlative complications. (authors)

2008-01-01

320

The role of inferior parietal and inferior frontal cortex in working memory.  

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Verbal working memory involves two major components: a phonological store that holds auditory-verbal information very briefly and an articulatory rehearsal process that allows that information to be refreshed and thus held longer in short-term memory (A. Baddeley, 1996, 2000; A. Baddeley & G. Hitch, 1974). In the current study, the authors tested two groups of patients who were chosen on the basis of their relatively focal lesions in the inferior parietal (IP) cortex or inferior frontal (IF) cortex. Patients were tested on a series of tasks that have been previously shown to tap phonological storage (span, auditory rhyming, and repetition) and articulatory rehearsal (visual rhyming and a 2-back task). As predicted, IP patients were disproportionately impaired on the span, rhyming, and repetition tasks and thus demonstrated a phonological storage deficit. IF patients, however, did not show impairment on these storage tasks but did exhibit impairment on the visual rhyming task, which requires articulatory rehearsal. These findings lend further support to the working memory model and provide evidence of the roles of IP and IF cortex in separable working memory processes. PMID:16938015

Baldo, Juliana V; Dronkers, Nina F

2006-09-01

 
 
 
 
321

Panoramic radiography and cone-beam computed tomography findings in preoperative examination of impacted mandibular third molars  

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Background Preoperative radiographic examination of impacted mandibular third molars (IMTM) is essential to prevent inferior alveolar nerve injury during extraction. The purpose of this study was to evaluate the correlation between cone-beam computed tomography (CBCT) and digital panoramic radiography (DPR) findings in preoperative examination of IMTM. Methods This retrospective study included 298 teeth in 191 individuals. The relationship between the inferior alveolar canal (IAC) and the IMTM (buccal, lingual, interradicular or inferior), the position of the IMTM with respect to the IAC (contact, no contact), the morphologic shape of the mandible in the IMTM region (round, lingual extended, lingual concave), the type of IMTM (vertical, horizontal or angular) and the number of roots of the IMTM were evaluated on CBCT images. DPR images were evaluated for the number of roots of the IMTM and for the most common radiographic findings indicating a relationship between the IAC and the IMTM (darkening of the roots, diversion of the IAC, narrowing of the IAC and interruption of the white line). Data were statistically analyzed with Cramer V coefficient, Kappa statistic, chi-square and Fisher’s exact test. Results There was a significant difference in number of roots detected on DPR versus CBCT images. There was a significant association between the type of IMTM and the morphologic shape of the mandible on CBCT images. Darkening of the roots and interruption of the white line on DPR images were significantly associated with the presence of contact between the IMTM and the IAC on CBCT images. Conclusions Panoramic radiography is inadequate, whereas CBCT is useful to detect multiple roots of IMTM. When darkening of the roots and interruption of the white line are observed on panoramic images, there is increased likelihood of contact between the IMTM and the IAC. CBCT is required in these cases.

2014-01-01

322

Maxillary right second molar with two palatal root canals  

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We report a clinical case of maxillary right second molar with two palatal root canals. The morphology is atypical because it is characterized by two palatal roots with two canals with widely separated orifices and canals. Modifications to the normal access opening and examination of the pulpal floor for additional canals are stressed.

Prashanth M; Jain Pradeep; Patni Pallav

2010-01-01

323

Maxillary right second molar with two palatal root canals  

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Full Text Available We report a clinical case of maxillary right second molar with two palatal root canals. The morphology is atypical because it is characterized by two palatal roots with two canals with widely separated orifices and canals. Modifications to the normal access opening and examination of the pulpal floor for additional canals are stressed.

Prashanth M

2010-01-01

324

Factors associated with molar incisor hypomineralization in Thai children.  

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Molar incisor hypomineralization (MIH) is a qualitative developmental enamel defect that affects one to four permanent first molars, with or without involvement of permanent incisors. Its etiology is of systemic origin, but is not well understood. Therefore, we conducted this cross-sectional study to examine pre-, peri-, and postnatal risk factors for MIH among children, 7-8 yr of age, in urban areas of Khon Kaen, Thailand. Molar incisor hypomineralization defects were diagnosed using the European Academy of Pediatric Dentistry criteria. Mothers or primary caregivers were interviewed on maternal medical history and habits during pregnancy, pregnancy and delivery complications, and the child's medical history. Molar incisor hypomineralization defects were observed in 78 (27.7%) of 282 children. Multiple logistic regression analysis showed a statistically significant association between the development of MIH and Cesarean section (adjusted OR = 2.0, 95% CI = 1.1-3.7), complications during vaginal delivery (adjusted OR = 4.5, 95% CI = 1.9-11.0), and severe/chronic illness when under 3 yr of age (adjusted OR = 2.9, 95% CI = 1.6-5.0). There was no association of preterm birth and low birth weight with MIH. The results suggest that Cesarean section, complications during vaginal delivery, and poor health during the first 3 yr of life are independent risk factors for MIH. PMID:24924351

Pitiphat, Waranuch; Luangchaichaweng, Sarunporn; Pungchanchaikul, Patimaporn; Angwaravong, Onauma; Chansamak, Nusara

2014-08-01

325

Preparation of tritiated aniline of high molar activity  

International Nuclear Information System (INIS)

Synthesis technique of aniline, tritiated by aminogroup and ortho- and para-pisition of aromatic ring without carrier is proposed. The technique is based on azobenzene reduction splitting by gaseous tritium on palladium catalyser under, static conditions. The molar activity of aniline produced makes up 10.4x1014 Bq/mol

1989-01-01

326

Term Pregnancy with Partial Molar Changes of Placenta  

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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.

Amita Gupta,Yudhister Veer Gupta

2003-04-01

327

Hitos de la perspectiva molar del condicionamiento clásico  

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En este artículo se revisan los acontecimientos históricos fundamentales en la teoría del condicionamiento clásico como fenómeno psicológico ?comportamental o cognoscitivo?, es decir, desde una perspectiva molar, en oposición a una perspectiva molecular, que es propia de las neurociencias. Se analizan los siguientes acontecimientos o hitos: la teoría reflexológica de Vladimir Bechterev, la perspectiva conductista radical de B. F. Skinner, el modelo ...

2003-01-01

328

Miniscrew-supported coil spring for molar uprighting: description  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: English Abstract in portuguese 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.

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

329

Taurodontism of deciduous and permanent molars: Report of two cases  

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Taurodontism is an aberration of teeth that lacks the constriction at the level of the CEJ characterized by elongated pulp chambers and apical displacement of bifurcation or trifurcation of the roots, giving it a rectangular shape. Its occurrence in permanent teeth is common and is quite rare in deciduous dentition. Presented in this article are two cases with taurodontism involving deciduous and permanent molars.

2006-01-01

330

Molar enthalpies of formation of LnAl_2 compounds  

International Nuclear Information System (INIS)

The enthalpy of solution of Eu in Al and the standard molar enthalpy of formation of LnAl_2 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) were determined by dissolution calorimetry, using a calorimeter based on liquid aluminium. Experimental results are compared with model predictions. (author)

1985-01-01

331

Experimental standard molar enthalpies of formation of some methylbenzenediol isomers  

International Nuclear Information System (INIS)

The present work is part of a research program on the energetics of formation of alkyl substituted benzenediols, aiming the study of the enthalpic effect of the introduction of methyl substituents into benzenediols. In this work we present the results of the thermochemical research on 2-methylresorcinol, 3-methylresorcinol, 4-methylresorcinol, and methylhydroquinone. The standard (p0=0.1MPa) molar enthalpies of formation, in the crystalline phase, at T = 298.15 K, of the compounds mentioned above were derived from their standard massic energies of combustion, measured by static-bomb combustion calorimetry, while the standard molar enthalpies of sublimation of those compounds were obtained by the temperature dependence of their vapour pressures determined by the Knudsen effusion technique. From experimental values, the standard molar enthalpies of formation of the studied methylbenzenediols in the gaseous phase, at T = 298.15 K were then derived. The results are interpreted in terms of structural contributions to the energetics of the substituted benzenediols and compared with the same parameters estimated from the Cox Scheme. Moreover, the standard (p0=0.1MPa) molar enthalpies, entropies, and Gibbs energies of sublimation, at T = 298.15 K, were derived for the four isomers of methylbenzenediols.

2009-10-01

332

Unilateral maxillary molar distalization with zygoma-gear appliance.  

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The aim of this study was to present the orthodontic treatment of a 15-year-old boy with a unilateral maxillary molar distalization system, called the zygoma-gear appliance. It consisted of a zygomatic anchorage miniplate, an inner bow, and a Sentalloy closed coil spring (GAC International, Bohemia, NY). A distalizing force of 350 g was used during the distalization period. The unilateral Class II malocclusion was corrected in 5 months with the zygoma-gear appliance. The maxillary left first molar showed distalization of 4 mm with an inclination of 3°. The maxillary premolars moved distally with the help of the transseptal fibers. In addition, there were slight decreases in overjet (-0.5 mm) and maxillary incisor inclination (-1°), indicating no anchorage loss from the zygoma-gear appliance. Preadjusted fixed appliances (0.022 × 0.028-in, MBT system; 3M Unitek, Monrovia, Calif) were placed in both arches to achieve leveling and alignment. After 14 months of unilateral distalization with the zygoma-gear appliance and fixed appliances, Class I molar and canine relationships were established with satisfactory interdigitation of the posterior teeth. Acceptable overjet and overbite were also achieved. This article shows that this new system, the zygoma-gear appliance, can be used for unilateral maxillary molar distalization without anchorage loss. PMID:22858341

Kilkis, Dogan; Bayram, Mehmet; Celikoglu, Mevlut; Nur, Metin

2012-08-01

333

Molar incisor hypomineralization: review and recommendations for clinical management.  

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Molar incisor hypomineralization (MIH) describes the clinical picture of hypomineralization of systemic origin affecting one or more first permanent molars (FPMs) that are associated frequently with affected incisors. Etiological associations with systemic conditions or environmental insults during the child's first 3 years have been implicated. The complex care involved in treating affected children must address their behavior and anxiety, aiming to provide a durable restoration under pain-free conditions. The challenges include adequate anaesthesia, suitable cavity design, and choice of restorative materials. Restorations in hypomineralized molars appear to fail frequently; there is little evidence-based literature to facilitate clinical decisions on cavity design and material choice. A 6-step approach to management is described: (1) risk identification; (2) early diagnosis; (3) remineralization and desensitization; (4) prevention of caries and posteruption breakdown; (5) restorations and extractions; and (6) maintenance. The high prevalence of MIH indicates the need for research to clarify etiological factors and improve the durability of restorations in affected teeth. The purpose of this paper was to describe the diagnosis, prevalence, putative etiological factors, and features of hypomineralized enamel in molar incisor hypomineralization and to present a sequential approach to management. PMID:16805354

William, Vanessa; Messer, Louise B; Burrow, Michael F

2006-01-01

334

Ressonância magnética cardiovascular em veia cava inferior interrompida não prevista / Cardiovascular magnetic resonance in unsuspected interrupted inferior vena cava / Cardiovascular magnetic resonance in unsuspected interrupted inferior vena cava  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese A Veia Cava Inferior (VCI) interrompida é uma anomalia rara. As anomalias da VCI são clinicamente importantes para os cardiologistas e radiologistas que pretendem intervir na cavidade cardíaca direita. Descrevemos três casos de interrupção da VCI diagnosticados por meio de estudo imaginológico de re [...] ssonância magnética cardíaca. Abstract in spanish La Vena Cava Inferior (VCI), interrumpida es una anomalía rara. Las anomalías de la VCI son clínicamente importantes para los cardiólogos y radiólogos que pretenden intervenir en la cavidad cardíaca derecha. Aquí describimos tres casos de interrupción de la VCI diagnosticados por medio de un estudio [...] imaginológico de resonancia magnética cardíaca. Abstract in english Interrupted inferior vena cava (IVC) is a rare anomaly. Anomalies of IVC are clinically important for cardiologists and radiologists who plan to intervene in the right heart. We describe three cases of IVC interruption diagnosed by cardiac magnetic resonance imaging study. [...

Andre Mauricio, Fernandes; Vikas, Rathi; June, Yamrozik; Ronald, Willians; Robert W., Biederman.

335

Ressonância magnética cardiovascular em veia cava inferior interrompida não prevista Cardiovascular magnetic resonance in unsuspected interrupted inferior vena cava Cardiovascular magnetic resonance in unsuspected interrupted inferior vena cava  

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Full Text Available A Veia Cava Inferior (VCI interrompida é uma anomalia rara. As anomalias da VCI são clinicamente importantes para os cardiologistas e radiologistas que pretendem intervir na cavidade cardíaca direita. Descrevemos três casos de interrupção da VCI diagnosticados por meio de estudo imaginológico de ressonância magnética cardíaca.La Vena Cava Inferior (VCI, interrumpida es una anomalía rara. Las anomalías de la VCI son clínicamente importantes para los cardiólogos y radiólogos que pretenden intervenir en la cavidad cardíaca derecha. Aquí describimos tres casos de interrupción de la VCI diagnosticados por medio de un estudio imaginológico de resonancia magnética cardíaca.Interrupted inferior vena cava (IVC is a rare anomaly. Anomalies of IVC are clinically important for cardiologists and radiologists who plan to intervene in the right heart. We describe three cases of IVC interruption diagnosed by cardiac magnetic resonance imaging study.

Andre Mauricio Fernandes

2012-02-01

336

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

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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

Ania Moreno Véliz

2008-06-01

337

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)

Full Text Available SciELO Cuba | Language: Spanish Abstract in spanish 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

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

338

CONTRIBUTIONS TO MOLDOVA RIVER’S INFERIOR BASIN VEGETATION KNOWLEDGE  

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Full Text Available Authors describes in this paper two vegetal associations (mesophyllus grasslands, Festuco rubrae-Agrostetum capillaris Horvati? 1951 and Trisetetum flavescentis R?bel 1911 from the inferior basin of Moldova river.

M?RIU?A CONSTANTIN

2004-01-01

339

Injuries of the retrohepatic inferior vena cava and the liver  

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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 ...

Koprivica Radenko; Cvijovi? Radiša; Koprivica Ranka; Smiljani? Radmila

2008-01-01

340

Pseudo-dissection of ascending aorta in inferior myocardial infarction  

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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 non-invasive imaging 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...

Attar, Muhammad Nadeem; Elmahy, Hossam; Goode, Grahame K.

2011-01-01

 
 
 
 
341

Pseudo-dissection of ascending aorta in inferior myocardial infarction.  

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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 co...

Muhammad Nadeem Attar; Hossam Elmahy; Goode, Grahame K.

2011-01-01

342

Management of primary rhegmatogenous retinal detachment with inferior breaks  

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Background: Rhegmatogenous retinal detachments (RRD) with inferior breaks are usually treated by scleral buckling (SB) or pars plana vitrectomy (PPV) or a combination of both methods. However, applying a SB during PPV may produce a risk of choroidal haemorrhage. Following a recent pilot study showing that such cases can be safely treated by PPV without SB the authors re-examined their management of RRD in which inferior breaks were present.

Sharma, A.; Grigoropoulos, V.; Williamson, T. H.

2004-01-01

343

Inferior Ectopic Pupil and Typical Ocular Coloboma in RCS Rats  

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Ocular coloboma is sometimes accompanied by corectopia in humans and therefore ectopic pupil may indicate ocular coloboma in experimental animals. The RCS strain of rats has a low incidence of microphthalmia. We found that inferior ectopic pupil is associated exclusively with small-sized eyes in this strain. The objective of the current study was to evaluate whether inferior ectopic pupil is associated with iridal coloboma and other types of ocular coloboma in RCS rats. Both eyes of RCS rats ...

2011-01-01

344

Collateral veins in inferior caval vein occlusion demonstrated via CT  

International Nuclear Information System (INIS)

CT-scans of 12 patients with tumour-induced occlusion of the inferior vena cava were studied with regard to collateral veins. A comparison was performed with findings at phlebography in 10 patients and at autopsy in 2. The site and appearance of the main collateral pathway are presented. A close study of vascular structures renders useful information on collateral circulation in occlusion of the inferior vena cava. (orig.)

1983-01-01

345

Collateral veins in inferior caval vein occlusion demonstrated via CT  

Energy Technology Data Exchange (ETDEWEB)

CT-scans of 12 patients with tumour-induced occlusion of the inferior vena cava were studied with regard to collateral veins. A comparison was performed with findings at phlebography in 10 patients and at autopsy in 2. The site and appearance of the main collateral pathway are presented. A close study of vascular structures renders useful information on collateral circulation in occlusion of the inferior vena cava.

Lien, H.H.; Lund, G.

1983-11-01

346

Cardiac Myxoma Arising from the Inferior Vena Cava  

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A cardiac myxoma that arises from the inferior vena cava (an extremely rare finding) may interfere with caval cannulation. In such cases venous cannulation for cardiopulmonary bypass has been performed directly into the inferior vena cava or through the femoral vein. We present a case in which routine cannulation through the right atrium proved safe and gave good exposure for complete resection of the tumoral mass. (Texas Heart Institute Journal 1992;19:288-90)

1992-01-01

347

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

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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.

Rodríguez Rodríguez, M.

1992-12-01

348

Classification of the inferior turbinate bones: a computed tomography study  

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Background: There are only few reports describing the texture of the inferior turbinate bone in normal and pathologic conditions. In this study, different types of human inferior turbinate bones were classified and radiological features of each type were defined. Methods: The shape, structure and density of the inferior turbinate bones were evaluated using paranasal sinus computed tomography images of 283 patients. The cross-sectional areas of the bony part of the inferior turbinate were measured in bone windows. Results: Human inferior turbinate bones were classified into four groups on the basis of different shape and structure as: Type I, lamellar; Type II, compact; Type III, combined type (compact with spongious component); Type IV, bullous. The distribution was as follows: 352 (62.19%) lamellar, 50 (8.83%) compact, 162 (28.63%) combined, and 2(0.35%) bullous type. Conclusion: Inferior turbinate bone is not in a uniform shape and structure. These diversities should be taken into consideration in radiological and clinical evaluation.

Uzun, Lokman E-mail: luzun99@yahoo.com; Ugur, Mehmet Birol; Savranlar, Ahmet; Mahmutyazicioglu, Kamran; Ozdemir, Huseyin; Beder, Levent Bekir

2004-09-01

349

Opioid modulation of GABA release in the rat inferior colliculus  

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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.

Forge Andrew

2004-09-01

350

Influence of third molar space on angulation and dental arch crowding.  

Science.gov (United States)

The influence of the third molars on mandibular incisor crowding has been extensively studied but remains controversial. The purpose of this study was to ascertain whether, in Mongolian subjects, the lower third molar can affect anterior crowding and/or the inclination of teeth in the lower lateral segments. Panoramic radiographs, 45° oblique cephalograms, and dental casts were taken from Mongolian subjects (age range 18.3-24.1 years, mean 21.0 years) exhibiting impaction of all four third molars and an Angle Class I molar relationship. The Ganss ratio was calculated using panoramic radiographs, whereas the gonial angle and angulation of lower canines, premolars and molars were measured using 45° oblique cephalograms. Little's index of irregularity was calculated using dental casts. Significant relationships between the angulation of the third and second molars and between the first molars and second premolars were found. Conversely, there was no significant correlation between the angulation of third molars, first premolars and canines. The Ganss ratio calculations showed that the lower first and second molars and the second premolars inclined mesially if there was insufficient space for the lower third molars. However, there was no significant correlation between Little's index of irregularity and third molar angulation. Furthermore, although the third molar influences the lateral segments, no obvious relationship between the third molar and anterior crowding was observed. Therefore, the angulation of the third molar appears not to cause anterior crowding. PMID:22527908

Hasegawa, Yuh; Terada, Kazuto; Kageyama, Ikuo; Tsuchimochi, Takashi; Ishikawa, Fujiro; Nakahara, Sen

2013-01-01

351

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

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese 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

Paulo, Belfort; Antônio, Braga.

352

Internal structure of mandible around mandibular molar using computed tomography. Anatomical consideration of molar anchorage in orthodontic treatment  

International Nuclear Information System (INIS)

For establishment of fine occlusion, facial profile and oral function in orthodontic treatment, molar anchorage in teeth movement is important manner in extracted cases. The aims of this study were to investigate the relationship between facial morphology and internal structure of mandibular body in molar region by computer tomography, and to discuss about molar anchorage in orthodontic treatment. The data for this study were obtained from 35 modern male Japanese skulls (mean age; 27 year-old, ranged from 18 year-old to 47 year-old). Measurement variables were FMA, SN to mandibular plane angle, gonial angle, alveolar breadth, cortical bone thickness of buccal and lingual sides, and the distance between dental root and cortical bone. As a result, alveolar breadth and the distance between dental root and cortical bone were narrow in long facial type, on the contrary, these variables were wide in short facial type. The result suggested that these variables were considered important factors as molar anchorage in extracted cases. (author)

2008-04-01

353

Retenção prolongada de molares decíduos: diagnóstico, etiologia e tratamento / Prolonged retention of deciduous molars: diagnosis, aetiology and treatment  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Este estudo apresenta uma revisão de literatura e um relato de dois casos clínicos sobre retenção prolongada de molares decíduos, com o objetivo de descrever os meios de diagnóstico, a etiologia, as implicações clínicas e o tratamento desta condição. Fatores etiológicos locais, ambientais ou genétic [...] os podem levar à retenção de molares decíduos, interferindo na seqüência normal de erupção dos pré-molares. Nos dois casos clínicos apresentados, os pacientes apresentaram um quadro de erupção dentária incompatível com a idade cronológica. A conduta terapêutica baseou-se na realização de exodontias dos elementos retidos, seguida da manutenção de espaço e controle clínico e radiográfico até a erupção dos sucessores. O diagnóstico e a intervenção precoces são de fundamental importância para evitar danos à oclusão. Abstract in english This paper consist of a literature review about the prolonged retention of the primary molars and two clinical case reports with the purpose of describing the the diagnosis, etiology, the clinical implication and the recommend treatment for this condition. Local, environmental or genetic etiological [...] factors may lead to over-retention of primary molars, interfering in the normal sequence of the eruption of the premolars. In the two case reports presented the patients'dental eruption showed not to be compatible to their chronological age. The recommended treatment was based on the extraction of the retained elements followed by the space maintenance and by clinical and radiographic control until the eruption of the succedaneous teeth.The early diagnosis and intervention are very important to prevent damages to the occlusion.

Teixeira, Flávia Santos; Campos, Vera; Mitchell, Constance; Carvalho, Laura Maria Barbosa de.

354

Retenção prolongada de molares decíduos: diagnóstico, etiologia e tratamento Prolonged retention of deciduous molars: diagnosis, aetiology and treatment  

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Full Text Available Este estudo apresenta uma revisão de literatura e um relato de dois casos clínicos sobre retenção prolongada de molares decíduos, com o objetivo de descrever os meios de diagnóstico, a etiologia, as implicações clínicas e o tratamento desta condição. Fatores etiológicos locais, ambientais ou genéticos podem levar à retenção de molares decíduos, interferindo na seqüência normal de erupção dos pré-molares. Nos dois casos clínicos apresentados, os pacientes apresentaram um quadro de erupção dentária incompatível com a idade cronológica. A conduta terapêutica baseou-se na realização de exodontias dos elementos retidos, seguida da manutenção de espaço e controle clínico e radiográfico até a erupção dos sucessores. O diagnóstico e a intervenção precoces são de fundamental importância para evitar danos à oclusão.This paper consist of a literature review about the prolonged retention of the primary molars and two clinical case reports with the purpose of describing the the diagnosis, etiology, the clinical implication and the recommend treatment for this condition. Local, environmental or genetic etiological factors may lead to over-retention of primary molars, interfering in the normal sequence of the eruption of the premolars. In the two case reports presented the patients'dental eruption showed not to be compatible to their chronological age. The recommended treatment was based on the extraction of the retained elements followed by the space maintenance and by clinical and radiographic control until the eruption of the succedaneous teeth.The early diagnosis and intervention are very important to prevent damages to the occlusion.

Flávia Santos Teixeira

2005-06-01

355

Partial Molar Volumes for Lanthanide Sesquioxides in Sodium Silicate Melts  

Science.gov (United States)

Lanthanides are of great interest in igneous petrology as trace indicators of magmatic processes that control the origin and evolution of igneous rocks. A key to the petrogenetic modelling of magmatic processes and to determine the phase diagrams of lanthanide host phases is the accurate determination of the physico-chemical and thermodynamic properties of lanthanide-containing materials, such as the volumetric properties of lanthanide-bearing silicate melts. Therefore, we have undertaken to provide a new reliable volumetric data set for lanthanide-bearing silicate melts which allows the available models in the literature to be extended to lanthanide-bearing melts. For this purpose, the densities of various lanthanide-bearing silicate melts distributed along various pseudo-binary joins, where the end-members are Na-disilicate and one of the lanthanide sesquioxides (i.e., Ce2O3, Pr2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3 and Yb2O3), have been measured using the double-bob Archimedean method. The present results show that the addition of any lanthanide to Na-disilicate leads to an increase i