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Sample records for molar deciduo inferior

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

    Toda, Maria Aparecida

    2003-07-01

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

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

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

    2010-11-01

    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.

  3. Significance of Radiological Variables Studied on Orthopantamogram to Pridict Post-Operative Inferior Alveoler Nerve Paresthesia After Third Molar Extraction

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

    2014-01-01

    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 diagnos...

  4. Lingual and inferior alveolar nerve injuries after third molar removal.

    Donoff, R Bruce; Fagin, Adam P

    2013-01-01

    Trigeminal nerve injury is a rare, but serious complication of a common procedure, which results in a clinically relevant problem that deserves attention. The emergence of microsurgical repair of trigeminal injury has provided clinicians with treatment options for patients who experience persistent neurosensory deficits. The area of microsurgical repair of trigeminal nerves is now in its adolescence. While great strides have been made in the field since its conception, it is certain that a new generation of oral and maxillofacial surgeons wil bring further progress to the field. In the future, better quantitative sensory testing methods, more accurate imaging modalities, and advances in surgical technique will certainly improve the management of patients with impacted third molars. As clinicians, every day we are confronted with the management of impacted third molars. It is important to evaluate each patient individually with an appropriate clinical and radiographic exam. Every patient should be informed of the relative risks and benefits of third molar removal and a joint decision should be reached between the clinician and patient regarding ideal treatment. However, even with ideal management, complications will occur. If a patient does present with signs of a nerve injury the clinician should carefully document the neurosensory deficit and monitor the patient over time. If the patient exhibits a significant sensory deficit for more than one month a referral for evaluation to a tertiary care center capable of surgical repair of the injury is recommended. The occurrence of a "trigger" or Tinel's like sign is improtant as an indication for surgery but may not occur for a month after injury.

  5. Cementoblastoma benigno associado a segundo pré molar inferior : relato de caso

    Mahl, Carlos Eduardo Winck; Gegler, Aderson; Fontanella, Vania Regina Camargo

    2003-01-01

    0 cementoblastoma benigno é uma lesao produtora de cemento que constitui apenas 1% dos tumores odontogenicos, na maioria dos casos esta associada a molares inferiores e acomete adultos jovens. Relata-se urn caso no qual observa-se uma apresentagao atipica quanto localizacao e faixa etaria.

  6. Inferior Alveolar Nerve Injury after Mandibular Third Molar Extraction: a Literature Review

    Rafael Sarikov

    2014-12-01

    Full Text Available Objectives: The purpose of this study was to systematically review the comprehensive overview of literature data about injury to the inferior alveolar nerve after lower third molar extraction to discover the prevalence of injury, the risk factors, recovery rates, and alternative methods of treatment. Material and Methods: Literature was selected through a search of PubMed electronic databases. Articles from January 2009 to June 2014 were searched. English language articles with a minimum of 6 months patient follow-up and injury analysis by patient’s reporting, radiographic, and neurosensory testing were selected. Results: In total, 84 literature sources were reviewed, and 14 of the most relevant articles that are suitable to the criteria were selected. Articles were analyzed on men and women. The influence of lower third molar extraction (especially impacted on the inferior alveolar nerve was clearly seen. Conclusions: The incidence of injury to the inferior alveolar nerve after lower third molar extraction was about 0.35 - 8.4%. The injury of the inferior alveolar nerve can be predicted by various radiological signs. There are few risk factors that may increase the risk of injury to the nerve such as patients over the age of 24 years old, with horizontal impactions, and extraction by trainee surgeons. Recovery is preferable and permanent injury is very rare.

  7. Digital versus conventional panoramic radiography in predicting inferior alveolar nerve injury after mandibular third molar removal.

    Szalma, József; Lempel, Edina; Jeges, Sára; Olasz, Lajos

    2012-03-01

    The aim of the study was to compare the accuracy of conventional and digital panoramic radiography (OPG) in relation to 4 specific high-risk signs (interruption of the superior cortical line, diversion, narrowing of the canal, and dark band of the root), which would indicate a close anatomic relationship between third molar roots and the inferior alveolar canal.Four hundred mandibular third molar surgical removals after conventional and 272 after digital radiographs were evaluated in the study. The association between postoperative inferior alveolar nerve (IAN) paresthesia and the presence of any preoperative high-risk signs in the OPG was investigated. Bivariate and multivariate logistic regression analyses were completed to compare the accuracy of conventional and digital radiographic techniques detecting high-risk signs predicting possible IAN paresthesia.Digital OPG results showed significantly higher sensitivity in diversion (P = 0.014) and narrowing (P paresthesia, whereas low positive predictive values indicate both imaging techniques as inadequate screening methods for predicting IAN paresthesia after mandibular third molar removal.

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

    A. Bagheri

    2012-01-01

    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.

  9. Glucocorticoides como profiláctico antinflamatorio en cirugía de terceras molares inferiores.

    Manrique-Guzmán, Jorge; Facultad de Odontología de la Universidad Nacional Federico Villarreal. Lima.; Chávez-Reátegui, Beatriz; Facultad de Estomatología. Universidad Peruana Cayetano Heredia. Lima.; Manrique-Chávez, Jorge; Facultad de Estomatología. Universidad Peruana Cayetano Heredia. Lima.

    2014-01-01

    Objetivo: Comparar la presencia de inflamación aguda severa en pacientes con y sin medicación antes del procedimiento de exodoncia de terceros molares inferiores, atendidos en la Clínica Odontológica de la Universidad Nacional Federico Villarreal. Material y métodos: Se tomó como muestra 116 pacientes de ambos sexos, entre 21 y 45 años de edad los cuales fueron divididos en dos grupos aleatoriamente, solo uno recibió medicación con Glucocorticoides antes del tratamiento. Resultados: Se encont...

  10. VALIDACIÓN DE LA RADIOGRAFÍA PANORÁMICA EN LA DETERMINACIÓN DE LA POSICIÓN DEL TERCER MOLAR INFERIOR RESPECTO AL CONDUCTO DENTARIO INFERIOR EN CRÁNEOS DE ADULTOS. AREQUIPA.2013

    OCOLA TICONA, BERLIE CESAR

    2014-01-01

    RADIOGRAFÍA PANORÁMICA HISTORIA Y EVOLUCIÓN FUNDAMENTOS DE LA RADIOGRAFÍA PANORÁMICA TERCEROS MOLARES CRITERIOS GENERALES CASUÍSTICA ETIOLOGÍA ETIOPATOGENIA CONDICIONES ANATÓMICAS DIAGNOSTICO CLASIFICACIÓN DE LAS IMPACTACIONES DEL TERCER MOLAR RELACIÓN DEL TERCER MOLAR INFERIOR CON EL CONDUCTO DENTARIO INFERIOR FORMAS DE PREVENCIÓN

  11. [The specific panoramic radiographic signs and their relation with inferior alveolar nerve injuries after mandibular third molar surgery].

    Szalma, József; Lempel, Edina; Csuta, Tamás; Vajta, László; Jeges, Sára; Olasz, Lajos

    2011-03-01

    The aim of the authors was to describe the classic specific panoramic signs (indicating a close spatial relationship between dental canal and third molar's root) on panoramic radiographic images and determine their role in the risk assessment, predicting inferior alveolar nerve (IAN) paresthesia after lower third molar removal. The authors represented an informative case, where the IAN was visible during the surgery. The exact knowledge of classic panoramic radiographic signs should help the determination of "high risk" cases predicting IAN paresthesia after mandibular third molar removal. The authors keep panoramic radiography rather a routine than the most superior diagnostic tool in third molar surgery.

  12. Ventana ósea vestibular para la extracción de los terceros molares inferiores retenidos

    Cima, Juan Ramón

    2013-01-01

    El objetivo principal de ésta investigación fue realizar un estudio comparativo entre las técnicas quirúrgicas convencionales o típicas (TQC), y la técnica quirúrgica propuesta para ésta tesis, que es la de la "Ventana Ósea Vestibular para la extracción de los terceros molares inferiores retenidos" (TQVOV). Teniendo en cuenta que la extracción de los terceros molares inferiores retenidos ha sido y es un problema todavía no resuelto en su totalidad por los cirujanos bucales, en lo qu...

  13. Sensory impairment of the lingual and inferior alveolar nerves following removal of impacted mandibular third molars.

    Gülicher, D; Gerlach, K L

    2001-08-01

    In a prospective study 1,106 impacted mandibular third molars were removed from 687 patients. Clinical, radiographic, and surgical factors were recorded. Postoperatively, we examined the modalities of common sensation in order to assess sensory deficit. The patients were followed up, until complete restitution occurred, or, if the sensibility failed to recover, for at least 6 months. A total of 3.6% of the operated sides demonstrated impairment of labial sensation, and 2.1% of lingual sensation. The vast majority of these disturbances subsided completely during the follow-up period. The incidence of persisting sensory diminution after 6 months was 0.91% for the inferior alveolar, and 0.37% for the lingual nerve. However, the degree of the persisting deficit was slight in most instances. The relationship between the recorded factors and the alteration of sensation was analysed by using the chi2 test. For the inferior alveolar nerve we found the patient's age, the development of the roots, the degree of impaction, and the radiographic position of the nerve canal to be significantly correlated to sensory deficit, as well as the surgical procedures in the depth of the socket and the intraoperative opening of the mandibular canal. As far as the lingual nerve is concerned, general anaesthesia and the individual operator were the main factors predictive of nerve damage.

  14. Cleaning and decompression of inferior alveolar canal to treat dysesthesia and paresthesia following endodontic treatment of a third molar

    Rudy Scala

    2014-01-01

    Full Text Available Endodontic overfilling involving the mandibular canal may cause an injury of the inferior alveolar nerve (IAN. We report a case of disabling dysesthesia and paresthesia of a 70-year-old man after endodontic treatment of his mandibular left third molar that caused leakage of root canal filling material into the mandibular canal. After radiographic evaluation, extraction of the third molar and distal osteotomy, a surgical exploration was performed and followed by removal of the material and decompression of the IAN. The patient reported an improvement in sensation and immediate disappearance of dysesthesia already from the first postoperative day.

  15. Cleaning and decompression of inferior alveolar canal to treat dysesthesia and paresthesia following endodontic treatment of a third molar.

    Scala, Rudy; Cucchi, Alessandro; Cappellina, Luca; Ghensi, Paolo

    2014-01-01

    Endodontic overfilling involving the mandibular canal may cause an injury of the inferior alveolar nerve (IAN). We report a case of disabling dysesthesia and paresthesia of a 70-year-old man after endodontic treatment of his mandibular left third molar that caused leakage of root canal filling material into the mandibular canal. After radiographic evaluation, extraction of the third molar and distal osteotomy, a surgical exploration was performed and followed by removal of the material and decompression of the IAN. The patient reported an improvement in sensation and immediate disappearance of dysesthesia already from the first postoperative day.

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

    I Prieto

    2005-10-01

    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.

  17. Comparison of Periodontal Ligament Injection and Inferior Alveolar Nerve Block in Mandibular Primary Molars Pulpotomy: A Randomized Control Trial

    Haghgoo, Roza; Taleghani, Ferial

    2015-01-01

    Background: Inferior alveolar nerve block is a common technique for anesthesia of the primary mandibular molars. A number of disadvantages have been shown to be associated with this technique. Periodontal ligament (PDL) injection could be considered as an alternative to inferior alveolar nerve block. The aim of this study was to evaluate the effectiveness of PDL injection in the anesthesia of primary molar pulpotomy with mandibular block. Methods: This study was performed using a sequential double-blind randomized trial design. 80 children aged 3-7 years old who required pulpotomy in symmetrical mandibular primary molars were selected. The teeth of these children were anesthetized with periodontal injection on one side of the mandible and block on the other. Pulpotomy was performed on each patient during the same appointment. Signs of discomfort, including hand and body tension and eye movement, the verbal complaint and crying (SEM scale), were evaluated by a dental assistant who was blinded to the treatment allocation of the patients. Finally, the data were analyzed using the exact Fisher test and Pearson Chi-squared exact test. Results: Success rate was 88/75 and 91/25 in the PDL injection and nerve block groups, respectively. There was no statistically significant difference between the two techniques (P = 0.250). Conclusion: Results showed that PDL injection can be used as an alternative to nerve block in pulpotomy of the mandibular primary molars. PMID:26028895

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

    Rosana Canteras Di Matteo

    2005-08-01

    Full Text Available Freqüentemente a movimentação ortodôntica exige recursos adicionais de ancoragem. Os mini-parafusos têm-se apresentado como uma possível solução. O propósito deste trabalho foi estabelecer um método para a verticalização de molares inferiores inclinados para mesial, utilizando ancoragem em mini-parafusos colocados na região de linha oblíqüa externa da mandíbula. Foram selecionados três pacientes entre 40 a 48 anos (dois do gênero feminino, um do gênero masculino, com molares inferiores inclinados para mesial e distalmente posicionados às áreas edêntulas. Os pacientes foram tratados ortodonticamente durante um período de 6 a 12 meses, com técnica ortodôntica MD3. Mini-parafusos de titânio foram colocados bilateralmente com anestesia local. Uma incisão sobre a linha oblíqüa externa da mandíbula, medindo aproximadamente 1 cm foi realizada em cada lado, distalmente aos molares inclinados. Após descolamento muco-periosteal, mini-parafusos foram implantados e foram realizadas suturas deixando suas cabeças exteriorizadas. Uma semana após a remoção das suturas, cargas ortodônticas (entre 150 a 200 gramas/força foram aplicadas através de forças elásticas. Verificamos que alguma inflamação foi observada ao redor dos mini-parafusos, mas foi controlada com procedimentos de higienização. O procedimento cirúrgico é simples, podendo ser realizado pelo ortodontista; as formas dimensionais dos mini-parafusos são adequadas e estes são de fácil remoção após uso. Concluímos que o uso de mini-parafusos representa uma alternativa efetiva de ancoragem ortodôntica na verticalização de molares inferiores.Tooth movement frequently requires additional anchorage resources. Mini-screws have been used as a possible solution to this matter. The purpose of this study was to establish a method of mandibular molar uprighting, using mini-screw as anchorage, positioned on the mandibular external oblique line, behind and

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

    Armando Nappi

    2003-10-01

    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

  20. Exames por Imagem na Avaliação da Distância entre Terceiros Molares Inferiores e o Nervo Alveolar Inferior: Revisão de Literatura

    2014-01-01

    TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Odontologia. A cirurgia de extração do terceiro molar inferior é um dos procedimentos mais comuns dentre as cirurgias dento alveolares. Desta forma, tornam-se frequentes as complicações advindas deste procedimento cirúrgico, sendo a mais comum a lesão/trauma do nervo alveolar inferior, visto sua proximidade com o terceiro molar inferior, que pode acarretar em danos significativos para o paciente como a p...

  1. Estudio estadístico del tercer molar inferior retenido, en la ciudad de Córdoba (Argentina)

    Bozzatello, Juana Rosa

    2015-01-01

    Considerando los accidentes y complicaciones que producen los terceros molares inferiores retenidos, en un alto porcentaje de pacientes entre 17 y 25 años de edad, hemos realizado un estudio estadístico para conocer de que manera impacta en lapoblación de la ciudad de Córdoba (Argentina). Para esto se relacionó tipo der etención (según clasificación de Winter, Pell y Gregory) con edad, sexo, índice craneofacial y sintomatología clínica presentada. Este estudio se practicó sobre 162 pacientes,...

  2. Evaluation by dental cone-beam computed tomography of the incidence and sites of branches of the inferior dental canal that supply mandibular third molars.

    Ogawa, A; Fukuta, Y; Nakasato, H; Nakasato, S

    2016-12-01

    Our aim was to assess the incidence and anatomical site of branches of the inferior dental canal that supply mandibular third molars using dental cone-beam computed tomography (CT). We evaluated the incidence and diameter of branches of the inferior dental canal using 272 cone-beam CT mandibular scans from 172 patients referred for imaging before the extraction of impacted mandibular third molars. We found three typical branching patterns from the inferior dental canal in the third molar region: the retromolar canal (in the retromolar triangle), the dental canal (that courses directly beneath the socket of the third molar), and the accessory canal (that courses through the socket and leads from the inferior dental canal to a bony ridge). The incidences of retromolar, dental, and accessory canals were 75 (28%), 223 (82%), and 21 (8%), respectively, with mean diameters of 0.9 (0.4), 0.7 (0.5), and 1.1 (0.4) mm, respectively. Operative injury to the neurovascular contents within the branches of the inferior dental canal can lead to excessive bleeding and postoperative paraesthesia, so identification of its branches on preoperative cone-beam CT images may prove useful during extraction of impacted mandibular third molars or when harvesting bone blocks from the region of mandibular third molars. We also describe two cases of branches detected on panoramic and cone-beam CT images that prompted this research.

  3. Antibiotics in third molar extraction; are they really necessary: A non-inferiority randomized controlled trial

    Arora, Ankit; Roychoudhury, Ajoy; Bhutia, Ongkila; Pandey, Sandeep; Singh, Surender; Das, Bimal K.

    2014-01-01

    Introduction: Antibiotic resistance is now a serious problem, although it was not so only a few years ago. The need of the hour is to give clear evidence of the efficacy of antibiotic use, or lack thereof, to the surgeon for a procedure as common as mandibular third molar surgery. Aim: This study aimed to evaluate whether postoperative combined amoxicillin and clavulanic acid in mandibular third molar extraction is effective in preventing inflammatory complications. Study and Design: The study was structured as a prospective randomized double-blind placebo-controlled clinical trial. Materials and Methods: A study was designed wherein the 96 units (two bilaterally similar impacted mandibular third molars per head in 48 patients) were randomly assigned to two treatment groups (Group I and Group II). Each patient served as his/her own control. Each patient received 625 mg of combined amoxicillin and clavulanic acid 1 h before surgery. In the case of third molars belonging to Group I, 625 mg of combined amoxicillin and clavulanic acid TDS was continued for 3 days; in Group II, placebo in similar-looking packs was continued for 3 days. The patients were evaluated on the third and seventh postoperative days for signs of clinical infection and for microbial load evaluation. Statistical Analysis: The data between the two groups were statistically analyzed by the two-tailed Fisher's exact test, with a 95% confidence interval. Results: The difference was not statistically significant between the test group and the control group with regard to erythema, dehiscence, swelling, pain, trismus, and infection based on microbial load. The data were statistically significant for alveolar osteitis, with the occurrence of alveolar osteitis (14.58%) in the placebo group. Conclusion: Postoperative antibiotics are recommended only for patients undergoing contaminated, long-duration surgery. PMID:25937728

  4. Parestesia do Nervo Alveolar Inferior associada a Exodontia de Terceiros Molares Mandibulares

    Costa, Gil Pereira Vieira da

    2011-01-01

    Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária. Nos dias actuais, a exodontia de terceiros molares é um procedimento cada vez mais comum no campo da Medicina Dentária, encontrando-se associado a uma série de problemas e complicações. Parestesia é uma condição localizada que consiste na perda de sensibilidade da região inervada pelo nervo que lhe está associada e que ocorre quando existe ou se pr...

  5. Penetración del hipoclorito de sodio al comparar cuatro sistemas rotatorios de preparación en conductos mesovestibulares de molares inferiores / Sodium Hypochlorite Penetration when comparing four Rotatory Preparation Systems in Lower-Molar Mesiobuccal...

    Covo Morales, Eduardo Enrique; Universidad de Cartagena. Cartagena, Colombia; Ruíz Llorente, Angela María; Práctica Privada en Endodoncia. Cartagena, Colombia; Simancas Pallares, Miguel Ángel; Universidad de Cartagena. Cartagena, Colombia.

    2015-01-01

    RESUMEN. Objetivo: Comparar la diferencia de longitud de penetración del hipoclorito de sodio al emplear cuatro sistemas rotatorios de preparación en conductos mesovestibulares de molares inferiores. Métodos: Fue un estudio experimental in vitro en 80 raíces mesiales de molares inferiores divididas aleatoriamente en cuatro grupos de 20 raíces cada uno entre los sistemas de preparación así: grupo 1, Reciproc®; grupo 2, Mtwo®; grupo 3, WaveOne®; grupo 4, ProTaper®. Se obtuvo radiografía de cond...

  6. The correlation between Rood and Shehab’s radiographic features and the incidence of inferior alveolar nerve paraesthesia following odontectomy of lower third molars

    David Buntoro Kamadjaja

    2017-02-01

    Full Text Available Background: Odontectomy of lower third molar has a potential risk for inferior alveolar nerve impairment. Paresthesia of inferior alveolar nerve has often been associated with close relationship between the apex of lower third molar and mandibular canal. Rood and Shehab’s category has been commonly used for radiological prediction of inferior alveolar nerve injury following third molar surgery. Purpose: This study aimed to determine whether there was correlation between Rood and Shehab’s radiographic features and the incidence of inferior alveolar nerve paraesthesia following odontectomy of lower third molar. Method: This was a retrospective cross-sectional study, using data obtained from the dental record of patients who had undergone odontectomy of lower third molars in Dental hospital of Universitas Airlangga during 2 years period. Samples were cases that, from presurgical radiograph, showed close relationship between lower third molar roots and mandibular canal. The case and non-case groups were assigned based on the presence of paraesthesia and non-paraesthesia of inferior alveolar nerves, respectively. Based on Rood and Shehab’s category, the samples collected were then classified into two groups which were those whose relationship matched and did not match with the category, respectively. Data were analyzed using Chi-square correlation test. Result: Of 975 odontectomy cases included in this study, 80 cases were taken as study samples consisting of 15 and 65 cases assigned, respectively, as case and non-case. The 32 cases matched with the criteria of Rood and Shehab's category while the remainder of 48 cases did not. Of 32 cases which met the criteria of Rood and Shehab’s relationship, only 5 cases showed paraesthesia, whereas out of 48 cases which did not met the criteria 10 cases showed paraesthesia. Statistical analysis showed significance value of 0.770 (p>0.05 indicating that there was no significant correlation between

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

    David Normando

    2010-12-01

    Full Text Available OBJETIVO: avaliar as alterações cefalométricas em pacientes com perda bilateral do primeiro molar inferior permanente. MÉTODOS: foram analisadas 68 telerradiografias laterais de pacientes de consultórios particulares. A amostra foi dividida em dois grupos pareados quanto ao sexo e idade - 34 indivíduos sem perdas (grupo controle e 34 com perda bilateral do primeiro molar inferior permanente (grupo com perda. Foram excluídos da amostra pacientes que haviam perdido outros dentes que não o primeiro molar inferior, casos de agenesia e pacientes com menos de 16 anos de idade. Buscou-se avaliar somente indivíduos que tivessem relatado a perda há pelo menos 5 anos. RESULTADOS: demonstraram que a perda bilateral do primeiro molar inferior permanente leva ao suave fechamento do ângulo GnSN (P=0,05, um giro anti-horário do plano oclusal (P=0,0001, uma suave diminuição da altura facial anteroinferior (P=0,05, uma acentuada inclinação lingual (P=0,04 e retrusão dos incisivos inferiores (P=0,03. Por outro lado, a perda bilateral do primeiro molar inferior permanente não foi capaz de influenciar a relação maxilomandibular no sentido anteroposterior (P=0,21, a quantidade de mento (P=0,45, a inclinação dos incisivos superiores (P=0,12 e a posição anteroposterior dos incisivos superiores (P=0,46. CONCLUSÃO: a perda bilateral dos primeiros molares inferiores é capaz de produzir alterações marcantes no posicionamento dos incisivos inferiores e no plano oclusal, além de uma suave redução vertical da faceOBJECTIVE: To evaluate cephalometric changes in patients after bilateral loss of lower first permanent molar teeth. METHODS: Sixty-eight lateral radiographs of patients from private practices were analyzed. The sample was divided into two groups matched for age and gender: 34 individuals without loss (control group and 34 presenting with bilateral loss of lower first permanent molar teeth (loss group. Patients who had lost teeth other

  8. 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

    Aldino Puppin Filho

    2011-12-01

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

  9. The Association between Panoramic Radiography and Clinical Symptoms During and After Third Molar Surgery in Diagnosis of Inferior Alveor Nerve Involvement

    Mehran Mohammadi

    2016-12-01

    Full Text Available Background and Objective:Radiographic assessment before third molar surgery allows the surgeon to consider any essential modifications in the surgical practice, thus minimizing the risk of damage to the inferior alveolar nerve. This study attempted to evaluate the association between radiographic evidence of inferior alveolar nerve involvement on the preoperative panoramic radiograph and its clinical symptoms during and after mandibular third molar surgery. Materials and Methods:In this cross-sectional study 464 patients went through panoramic radiography, examined by an oral and maxillofacial radiologist. Then, the relationship between the third molar's root and inferior alveolar nerve was determined. Furthermore, the data obtained from each patient such as intraoperative (canal bleeding or nerve exposure and postoperative (neurosensory deficit complications were recorded. At the next stage, data were analyzed by SPSS 20 and Fisher’s exact test. Results: The study consisted of 464 patients. 209 (45% patients out of 464 were suspected of having molarcanal contacts, 143 were observed to have loss of tramlines, 138 cases of which were partial and 118 had no upper canal border. In terms of clinical symptoms during surgery, 445 patients (95.9% showed no involvement while 6 patients (1.3% had postoperative paresthesis. Moreover, 8.6% of patients suspected of molar-canal contacts based on radiographic images demonstrated clinical symptoms of intraoperative nerve involvement. However, there was no significant relationship between radiographic findings and symptoms of postoperative nerve deficit (p=0.095. Conclusion: The results demonstrated there is a relationship between radiographic evidence of nerve-canal contact and intraoperative clinical symptoms. Moreover, panoramic radiographs cannot provide a useful tool to predict the risk of postoperative nerve paresthesia.

  10. Estudo comparativo entre dois protocolos anestésicos envolvendo bloqueio do nervo alveolar inferior convencional e de Vazirani-Akinosi para exodontia de terceiro molar inferior

    Danilo de Paula Ribeiro Borges

    Full Text Available INTRODUÇÃO: O bloqueio do nervo alveolar inferior (BNAI apresenta alta porcentagem de falha na Odontologia. A fim de melhorar esse índice, vêm-se estudando diferentes alternativas, como diferentes técnicas e soluções anestésicas. OBJETIVO: Avaliar duas diferentes técnicas - técnica 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.

  11. Hallazgos radiológicos en la evaluación prequirúrgica de la exodoncia del tercer molar inferior: estudio comparativo entre la radiografía panorámica y el CBCT

    Sanz Alonso, Javier

    2015-01-01

    Introducción La evaluación prequirúrgica de la exodoncia del tercer molar inferior se basa fundamentalmente en la radiografía panorámica. Únicamente en aquellos casos en los que se aprecian en ella signos de relación con el nervio dentario inferior se acude a un estudio adicional como el CBCT para clarificar dicha relación. Objetivos 1º.- Determinar la posición y situación del tercer molar que con mayor frecuencia se han encontrado. 2º.- Valorar la posición del nervio dentario inferior respec...

  12. 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

    S. Aboul-Hosn Centenero

    2009-10-01

    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.

  13. Articaine and mepivacaine buccal infiltration in securing mandibular first molar pulp anesthesia following mepivacaine inferior alveolar nerve block: A randomized, double-blind crossover study

    Giath Gazal

    2015-01-01

    Full Text Available Aims: A crossover double-blind, randomized study was designed to explore the efficacy of 2% mepivacaine with 1:100,000 adrenaline buccal infiltration and 4% articaine with 1:100,000 adrenaline buccal infiltration following 2% mepivacaine with 1:100,000 adrenaline inferior alveolar nerve block (IANB for testing pulp anesthesia of mandibular first molar teeth in adult volunteers. Materials and Methods: A total of 23 healthy adult volunteers received two regimens with at least 1-week apart; one with 4% articaine buccal infiltration and 2% mepivacaine IANB (articaine regimen and another with 2% mepivacaine buccal infiltration supplemented to 2% mepivacaine IANB (mepivacaine regimen. Pulp testing of first molar tooth was electronically measured twice at baseline, then at intervals of 2 min for the first 10 min, then every 5 min until 45 min postinjection. Anesthetic success was considered when two consecutive maximal stimulation on pulp testing readings without sensation were obtained within 10 min and continuously sustained for 45 min postinjection. Results: In total, the number of no sensations to maximum pulp testing for first molar teeth were significantly higher after articaine regimen than mepivacaine during 45 min postinjection (267 vs. 250 episodes, respectively, P 0.05. Interestingly, volunteers in the articaine regimen provided faster onset and longer duration (means 2.78 min, 42.22 min, respectively than mepivacaine regimen (means 4.26 min, 40.74 min, respectively for first molar pulp anesthesia (P < 0.001. Conclusions: Supplementary mepivacaine and articaine buccal infiltrations produced similar successful first molar pulp anesthesia following mepivacaine IANB injections in volunteers. Articaine buccal infiltration produced faster onset and longer duration than mepivacaine buccal infiltration following mepivacaine IANB injections.

  14. 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

    S. Olate

    2012-12-01

    Full Text Available 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 pIntroduction: 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 surgical 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<0,05 for statistical significance. Results: The surgical time used in the surgery was minorof 20 minutes in the 50% of the cases and minor of de 30 minutes in the 75 % ofthe cases. The patient's age, the molar's position, the presence of pericoronaritis and the 3M' s root anatomy were significantly associated with a IST (p<0,05, of equal way the flap

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

    Fábio Wildson Gurgel Costa

    2013-03-01

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

  16. Disturbio neurosensorial del nervio dentario inferior asociado al tratamiento endodóntico de una tercera molar. Reporte de caso

    Arce De La Cruz, Erika Gaby; Facultad de Estomatología, Universidad Peruana Cayetano Heredia. Lima,; Hernández Añaños, Felipe; Facultad de Estomatología, Universidad Peruana Cayetano Heredia. Lima,

    2014-01-01

    El disturbio neurosensorial del nervio dentario inferior es una complicación que puede ocurrir luego de realizar algunos procedimientos odontológicos como: exodoncia de dientes retenidos,colocación de implantes, y tratamientos endodónticos quirúrgicos y no quirúrgicos. Puede haber daño por injuria mecánica (sobrepase de instrumentos), injuria química (pasaje de hipoclorito o selladores endodónticos) e injuria térmica (sobrecalentamiento por procedimientos quirúrgicos). Los distubios neurosens...

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

    Harb, Leandro José Corrêa

    2010-01-01

    Full Text Available Objetivo: Avaliar a presença do canal cavo-interradicular em molares inferiores permanentes através de radiografias e diafanização. Metodologia: A amostra foi constituída por 344 molares inferiores re-hidratados, preparados e armazenados individualmente em recipientes de vidro. A presença do canal 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

  18. Estudio del postoperatorio tras la extracción quirúrgica de 100 terceros molares inferiores impactados en relación a la dificultad del acto quirúrgico

    2000-01-01

    El propósito de este estudio es valorar el dolor, la inflamación, el trismo y el consumo de analgésicos durante los 7 días del postoperatorio, tras la extracción quirúrgica de terceros molares inferiores impactados, en relación con la dificultad de la intervención. Incluimos 100 pacientes sanos que fueron sometidos a la extracción quirúrgica de terceros molares inferiores impactados. Valoramos el dolor postquirúrgico usando una escala analógica-visual, la inflamación mediante una escala subje...

  19. Estudo comparativo sobre a eficacia de duas drogas de ação analgesica (ibuprofeno e tramadol) apos extração de terceiros molares inferiores inclusos

    Marcio de Moraes

    1997-01-01

    Resumo: O objetivo deste trabalho foi comparar, clinicamente, a eficácia de duas substâncias de ação analgésica (ibuprofeno e tramadol), administradas em dose única pré-operatória, no controle da dor, edema e limitação da abertura bucal, após extração de terceiros molares inferiores inclusos. Foram selecionados 16 pacientes adultos da Odontologia que Faculdade de de Piracicaba-Unicamp necessitavam de exodontia de terceiros molares inferiores bilaterais inclusos em posições similares. As d...

  20. Estudo comparativo sobre a eficacia de duas drogas de ação analgesica (ibuprofeno e tramadol) apos extração de terceiros molares inferiores inclusos

    Marcio de Moraes

    1997-01-01

    O objetivo deste trabalho foi comparar, clinicamente, a eficácia de duas substâncias de ação analgésica (ibuprofeno e tramadol), administradas em dose única pré-operatória, no controle da dor, edema e limitação da abertura bucal, após extração de terceiros molares inferiores inclusos. Foram selecionados 16 pacientes adultos da Odontologia que Faculdade de de Piracicaba-Unicamp necessitavam de exodontia de terceiros molares inferiores bilaterais inclusos em posições similares. As drogas fo...

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

    Arteagoitia, Iciar; Zumarraga, Mercedes; Dávila, Ricardo; Barbier, Luis; Santamaría, Gorka

    2014-01-01

    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. Key words:Stress markets, epinephrine versus felypressin. PMID:24316704

  2. Avaliação radiográfica do comportamento dos terceiros molares inferiores em pacientes tratados ortodonticamente com e sem extrações de primeiros pré-molares Radiographic evaluation of the behavior of lower third molars in patients that were orthodontically treated with and without first premolars extractions

    Reinaldo Roberto Hauy

    2007-12-01

    Full Text Available OBJETIVO: o presente trabalho objetivou avaliar as alterações ocorridas nas posições dos terceiros molares inferiores em pacientes tratados ortodonticamente com extrações dos primeiros pré-molares. METODOLOGIA: utilizou-se 80 ortopantomografias, obtidas no pré e pós-tratamento ortodôntico corretivo de 40 pacientes, divididos em dois grupos. O grupo 1 constou de 20 pacientes (13 femininos e 7 masculinos que se submeteram a tratamento ortodôntico com extrações de primeiros pré-molares. O grupo 2 foi constituído por 20 pacientes (13 femininos e 7 masculinos tratados ortodonticamente sem extrações. Foram estabelecidas medidas angulares, com o objetivo de avaliar as inclinações e medidas lineares, para analisar as modificações no sentido vertical dos terceiros molares. Todos os dados foram mensurados duas vezes, cujos valores médios foram submetidos dos testes t emparelhado e teste t independente. RESULTADOS: os resultados mostraram diferenças estatisticamente significantes (pAIM: The aim of this study is to evaluate the positional changes occurred with lower third molars in patients treated orthodontically with extractions of first premolars. METHODS: A total of 80 panoramic radiographs obtained at pre and post-treatment periods from 40 patients, were divided into 2 groups: group 1 were composed by 20 patients (13 female and 7 male that were submitted to orthodontic treatment with extraction of first premolars; group 2 were composed by 20 patients (13 female and 7 male that were submitted to orthodontic treatment without extractions. Angular measurements were established to evaluate the tipping and linear measurements were established to analyze the vertical changes of the lower third molars. All data were measured twice and averaged, then submitted to paired and unpaired test. RESULTS: Significant differences were found between the initial and final angular measurements of group 1 (p<0.01. CONCLUSIONS: It was concluded that

  3. Método digital complementar na avaliação da relação entre terceiros molares inferiores com o canal da mandíbula em adolescentes e aultos jovens

    Silva, Fabiana Caroline da

    2013-01-01

    Resumo: Foi realizado um estudo em uma amostra com 66 terceiros molares inferiores (3°MI) de adolescentes e adultos jovens, com indicação de exodontia bilateral. Foi avaliada a relação entre esses dentes e o canal da mandíbula (CM) em radiografias panorâmicas, com o objetivo de identificar características de proximidade entre eles que possam predispor alterações sensoriais do nervo alveolar inferior, após a remoção cirúrgica. Foram estabelecidos os critérios de Rood (1990) e o estado de rizog...

  4. Estudio del saco pericoronario asintomático y la justificación de extirpación junto con el diente, en los terceros molares inferiores retenidos

    Ardiles, José Ricardo

    2015-01-01

    Introducción. Una gran parte de la población presenta terceros molares retenidos y no se somete al proceso de extracción quirúrgica. Objetivo. Comprobar que cantidad de sacos pericoronarios de terceros molares inferiores retenidos asintomáticos tienen potencialidad patológica Materiales y métodos. Se realizó un estudio prospectivo en 80 pacientes de la Facultad de Odontología de Córdoba-Argentina. Se realizaron cirugías y toma de material que consistió en sacos pericoron...

  5. Eficacia analgésica residual de la articaína vs bupivacaína en la cirugía del tercer molar inferior

    Estévez Rodríguez, Olalla

    2012-01-01

    El objetivo de este trabajo es estudiar la analgesia residual de la articaína versus bupivacaína en la cirugía del tercer molar, llegando a la conclusión de que la profundidad anestésica obtenida con bupivacaína fue significativamente mayor que la obtenida con articaína. [ABSTRACT] The purpose of this work is to study the residual analgesia of the articaine versus bupivacaine in the surgery of the third molar, with the conclusion that the depth of the anaesthesic effect obtained with bupiv...

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

    G. Laissle Casas del Valle

    2009-06-01

    Full Text Available La cirugía de terceros molares constituye en la práctica de la cirugía oral y maxilofacial, una de las intervenciones más realizadas. Las indicaciones son variadas, desde medidas profilácticas hasta grandes lesiones osteolíticas. Algunas de las consecuencias después de dicha intervención son; edema, trismus y dolor postoperatorio. En la técnica quirúrgica, el colgajo cobra gran importancia a la hora de minimizar estas consecuencias. El objetivo del presente estudio es evaluar el postoperatorio de la cirugía de terceros molares mandibulares incluidos, utilizando un colgajo lineal en un lado y un colgajo triangular en el otro lado del mismo paciente. Se realizó un estudio prospectivo en 15 pacientes de la Facultad de Odontología de la Universidad Mayor. Se tomaron registros fotográficos estandarizados y se midió la apertura bucal máxima pre-quirúrgica de cada paciente. Se registró el edema, la limitación de apertura bucal y el dolor a las 48 horas y a los 7 días, además del tiempo intraoperatorio. Todos los datos fueron analizados estadísticamente. No existen diferencias significativas en el edema, limitación de la apertura ni dolor al utilizar ambos colgajos. Tampoco existe correlación entre el tiempo operatorio y las tres variables estudiadas. El postoperatorio de la cirugía de terceros molares mandibulares incluidos es similar al utilizar un colgajo lineal o un colgajo triangular. El cirujano puede optar por uno o el otro indistintamente, según su preferencia.One of the most common procedures in the field of Oral and Maxillofacial Surgery is third molar surgery. From prophylactic measures to large osteolytic lesions, there are various indications. Some of the consequences of this procedure are; edema, trismus and postoperative pain. Flap design is an important feature of surgical technique that plays a vital role in minimizing these consequences. The objective of this study is a post operative evaluation of included

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

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

    2009-01-01

    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 postoperatori...

  8. Relación entre la edad cronológica y la mineralización del tercer molar inferior según método de Demirjian

    2014-01-01

    Objetivos: Relacionar la edad cronológica y la mineralización del tercer molar inferior según los estadios deDemirjian en radiografías panorámicas digitales. Material y Métodos: Se realizó un análisis retrospectivoevaluando 1176 radiografías panorámicas digitales del Servicio de Radiología de la Clínica Dental de la Facultadde Estomatología, Universidad Peruana Cayetano Heredia, entre los años 2011 y 2012. Los casos tenían entre 7 -23 años de edad. Resultados: En la pieza 38, el estadio D pre...

  9. Cusp expression of protostylid in deciduous and permanent molars

    Moreno, Sandra; Reyes, María Paula; Moreno, Freddy

    2016-01-01

    The present article is a case report on the cusp expression of protostylid in the deciduous inferior molars and in the first permanent inferior molar, in which the correspondence and bilateral symmetry of the mentioned expression can be evidenced, as well as the their relation with the foramen cecum of the mesiobuccal furrows of the deciduous and of the permanent inferior molars. PMID:28123270

  10. Estudio comparativo entre el uso de N – 2 butilcianoacrilato modificado y Vicryl 4 – 0 para el cierre de colgajos en cirugía de terceros molares Inferiores retenidos

    José Ignacio Serrano

    2014-12-01

    Full Text Available La extracción quirúrgica de los terceros molares supone la síntesis de los tejidos incididos previamente. El método de síntesis más utilizado en la práctica diaria del Cirujano Oral es la sutura con materiales convencionales guiados por una aguja para favorecer la cicatrización por primera intención, sin embargo, en la actualidad se ha puesto en boga la utilización de materiales adhesivos a base de Cianoacrilato para reemplazar las suturas convencionales, con el objetivo de disminuir el dolor postoperatorio, la dehiscencia de las heridas, el riesgo de infecciones, entre otros factores no menos importantes. Objetivo: El objetivo de este estudio predictivo es analizar comparativamente el dolor y la cicatrización de la herida postquirúrgica de terceros molares con la utilización de materiales de sutura adhesiva frente a suturas convencionales de vicryl 4/0 en cirugía de terceros molares retenidos. Materiales y métodos: Para este estudio predictivo se midieron los resultados arrojados de dos técnicas de síntesis en tejidos mucosos a través de la utilización de materiales de sutura convencional (vicryl 4/0 y sutura adhesiva a base de cianoacrilato. Se seleccionaron 30 de un universo de 137 pacientes que acuden al quirófano de la FOUCE y a clínicas particulares del cantón Sangolquí - Pichincha, en los que se realizaron 60 incisiones lineales de 3 cm de longitud, de ambos sexos, de entre 16 y 23 años de edad sin antecedentes patológicos personales. 30 incisiones correspondientes al tercer molar inferior izquierdo fueron sometidas a síntesis con material de sutura convencional y 30 incisiones correspondientes al tercer molar inferior derecho se sellaron con sutura adhesiva a base de cianoacrilato. Para valorar el dolor postquirúrgico se utilizó la técnica de escala visual análoga (EVA y para evaluar la dehiscencia de los tejidos se utilizó el método de inspección y observación. Los dos métodos se utilizaron al segundo

  11. 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

    Carla Renata Sipert

    2006-01-01

    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

  12. Preliminary study of panoramic radiographs and extraction of impacted inferior third molars at risk of inferior alveolar nerve injury%曲面断层片与下颌阻生第三磨牙拔除术中下牙槽神经损伤风险预测的初步研究

    马立

    2012-01-01

    目的:通过术前下颌阻生第三磨牙曲面断层片检查,结合拔牙术中所见,探讨牙齿根尖和下颌管之间X线关系与下牙槽神经损伤风险的相关因素.方法:收集129例术前行曲面断层片检查的下颌阻生第三磨牙拔除术患者,通过曲面断层片分析牙根与下颌管的关系及术中下牙槽神经的暴露及损伤情况.术后6个月定期进行临床检查,评估患者下唇及颏部的感觉是否异常.结果:曲面断层片显示根尖或根管透射影像和根管与下颌管重叠影像的患者中,12例术中出现下颌管暴露,其中有3例术后出现暂时性感觉迟钝,需要药物治疗.结论:下颌阻生第三磨牙拔牙术前曲面断层片显示根尖或根管透射影像和根管与下颌管重叠影像,提示下牙槽神经损伤的高风险.术前仔细分析患者的曲面断层片非常重要.%Objective To evaluate the intraoperative findings and the radiographic signs of patients with impacted mandibular third molars at risk of inferior alveolar nerve injury. Methods One hundred and twenty.nine cases with impacted mandibular third molars were selected by pantomogram. Radiographic signs of possible close relationship between the roots and canal, intraoperative exposition and damage of the inferior alveolar nerve were analysed. The clinical examinations and assessment for the sensation of the lower lip and chin were followed-up during 6 months. Results Intraoperative neural exposition was observed in 12 patients of those who have the signs of radiolucent apex or root and superimposition.3 patients complained of postoperative temporary hypoesthesia then healed by drugs. Conclusion At panoramic radiograph, the presence of signs of radiolucent apex or root.superimposition should be considered at high risk for the inferior alveolar neurovascular bundle damage.lt is important to analyse the adiographic signs of patients with impacted mandibular third molars before extraction.

  13. Comparación de la inflamación de tejidos blandos pos extracción simultánea de terceros molares inferiores utilizando en forma unilateral plasma rico en factores de crecimiento en el servicio de cirugía oral y maxilofacial, Hospital Enrique Garcés

    2015-01-01

    La utilización de plasma rico en plaquetas posextracción de terceros molares permite al paciente sometido a este tipo de tratamientos reducir los síntomas negativos que aparecen posterior a la extracción quirúrgica. La siguiente investigación se realizó en 32 pacientes, 17 mujeres y 15 hombres, que acudieron al servicio de Cirugía Oral y Maxilofacial del Hospital Enrique Garcés de la ciudad de Quito con la presencia de terceros molares inferiores incluidos con las mismas características radio...

  14. Molar Pregnancy

    ... may check for other medical problems, including: Preeclampsia Hyperthyroidism Anemia A molar pregnancy can't continue as a normal viable pregnancy. To prevent complications, the molar tissue must be removed. Treatment usually consists of one or more of the ...

  15. MOLAR UPRIGHTING

    Eka Erwansyah

    2006-04-01

    Full Text Available The mesial tipping of molar is frequently found in orthodontic cases. This molar malposition must be corrected since it may cause periodontal disorders, occlusal interferences, and temporomandibular joint dysfunction, and is often needed in planning a fixed bridge. This paper is a literature study to discuss about appliance designs, indication, and contraindications, and complication and treatment protocols of molar uprighting by fixed orthodontic appliances. By knowing the techniques of molar uprighting, the moments mentioned above can be avoided.

  16. “ EVALUACIÓN IN VITRO DEL GRADO DE FILTRACIÓN COMPARANDO TRES TÉCNICAS DE OBTURACIÓN: CONDENSACIÓN LATERAL, TOUCH'N HEAT Y TERMAFILL, POR MEDIO DE UN CORTE LONGITUDINAL, EN RAÍCES DISTALES DE MOLARES INFERIORES"

    Pérez Negrón Pérez, Paola

    2012-01-01

    En el presente estudio de filtración apical se compararon tres técnicas de obturación: Condensación Lateral, Touch’n Heat y Thermafil. Hasta la actualidad se trata de encontrar la mejor técnica de obturación que ofrezca mejor grado de sellado tridimensional ya que no existe un método que garantice el 100% de eficacia. Se utilizaron 60 raíces distales de molares inferiores de piezas dentarias permanentes, con ápices completamente formados, sin fracturas radiculares y sin t...

  17. Estabilidade da correção do apinhamento ântero-inferior na má oclusão de classe II de angle tratada com extração de dois e quatro pré-molares

    Mauro Carlos Agner Busato

    2003-01-01

    O objetivo desse estudo foi comparar a estabilidade de correção do apinhamento ântero-inferior, em pacientes portadores de má oclusão Classe II de Angle, que haviam se submetido à tratamento ortodôntico com duas ou com quatro extrações de pré-molares. Para tanto, foram selecionados 66 pacientes que apresentavam inicialmente uma má oclusão de no mínimo meia Classe II, e que foram tratados com uma das formas de tratamento propostas. Esses pacientes foram divididos em dois grupos, sendo o grupo ...

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

    Isa Geralda Teixeira Constante

    2007-03-01

    Full Text Available The aim of this study was to assess the correlation between the degree of angulation and the position of root curvatures and their influence on the comparative results between the performances of the Progressive, Staged and Serial Preparation Techniques. The mesiobucal canals of 70 extracted mandibular molars were filled with a radiological contrast of 100% Barium sulphate and radiographed with a direct digital radiographic system, in an apparatus that guarantees that the samples remain in the same spatial position at all times. The images were then analyzed in the Coreldraw 10 program (MicroSafe, RJ, Brasil in accordance with two criteria: the methods of Berbert, Nishiyama¹ (1994 and Schneider11 (1971 to determine the position and the angle of the root curvatures, respectively. Initially, the possibility of correlation between these two variables was studied. The teeth were then selected according to angulation (greater than 25 degrees and position of root curvatures (cervical, median and apical in order to perform the endodontic techniques. After preparation, the samples were radiographed again and the images were superimposed in order to compare the pre- and post-operative areas. The difference between them showed the percentage of widening for each technique. The results showed that there was no correlation between the angulations and the root curvature positions, and that the different positions did not interfere in the performance of the techniques. The Progressive Preparation technique produced the highest widening values for all the groups, irrespective of the root curvature position.O objetivo deste trabalho foi verificar a correlação entre o grau de angulação e a posição das curvaturas radiculares, e a sua influência nos resultados comparativos entre os desempenhos das técnicas do Preparo Progressivo, Escalonada e Seriada. Os canais mésio-vestibulares de 70 dentes molares inferiores extraídos foram preenchidos com um

  19. Complications of third molar surgery.

    Bouloux, Gary F; Steed, Martin B; Perciaccante, Vincent J

    2007-02-01

    This article addresses the incidence of specific complications and, where possible, offers a preventive or management strategy. Injuries of the inferior alveolar and lingual nerves are significant issues that are discussed separately in this text. Surgical removal of third molars is often associated with postoperative pain, swelling, and trismus. Factors thought to influence the incidence of complications after third molar removal include age, gender, medical history, oral contraceptives, presence of pericoronitis, poor oral hygiene, smoking, type of impaction, relationship of third molar to the inferior alveolar nerve, surgical time, surgical technique, surgeon experience, use of perioperative antibiotics, use of topical antiseptics, use of intra-socket medications, and anesthetic technique. Complications that are discussed further include alveolar osteitis, postoperative infection, hemorrhage, oro-antral communication, damage to adjacent teeth, displaced teeth, and fractures.

  20. Comparación de la inflamación de tejidos blandos pos extracción simultánea de terceros molares inferiores utilizando en forma unilateral plasma rico en factores de crecimiento en el servicio de cirugía oral y maxilofacial, Hospital Enrique Garcés

    Iván Enrique Llerena Toapata

    2015-12-01

    Full Text Available La utilización de plasma rico en plaquetas posextracción de terceros molares permite al paciente sometido a este tipo de tratamientos reducir los síntomas negativos que aparecen posterior a la extracción quirúrgica. La siguiente investigación se realizó en 32 pacientes, 17 mujeres y 15 hombres, que acudieron al servicio de Cirugía Oral y Maxilofacial del Hospital Enrique Garcés de la ciudad de Quito con la presencia de terceros molares inferiores incluidos con las mismas características radiográficas en las piezas dentales Nº 38 (lado izquierdo y Nº 48 (lado derecho A cada paciente se le extrajo 10 cc de sangre para preparar mediante centrifugación y activación el plasma rico en plaquetas, el cual se colocó únicamente posterior a la extracción quirúrgica de los terceros molares inferiores, en el alveolo correspondiente a la pieza Nº 48, sin aplicar nada en el alveolo correspondiente a la pieza Nº 38 y de esta manera observamos que, mediante escalas de medición del dolor y mediciones faciales a las 24 horas, 72 horas y 8 días posterior a la cirugía, nos dio como resultado la disminución tanto del dolor como la inflamación en el lado derecho en comparación con el lado izquierdo.

  1. Estudio de la efectividad del gel bioadhesivo de clorhexidina en la prevención de la alveolitis y su valor coadyuvante en el postoperatorio tras la extracción de terceros molares inferiores retenidos

    Torres-Lagares, Daniel

    2003-01-01

    La alveolitis es una complicación bastante frecuente tras la extracción, más aún cuando hablamos de la extracción de los terceros molares retenidos. En estos casos la osteítis alveolar es una patología de alto coste social, en forma de días de trabajo perdidos, baja de productividad, consultas de revisión por parte del cirujano y visitas al hospital. El 45% de los pacientes que desarrollan una alveolitis necesitan un mínimo de 4 visitas postoperatorias para diagnosticarla, tratarla y recupera...

  2. Relación entre el perfil psicológico del paciente y la calidad de vida tras la extracción quirúrgica del tercer molar inferior

    Fuster Torres, Mª Ángeles

    2016-01-01

    La evolución postoperatoria tras la extracción de los terceros molares depende de una serie de factores propios de cada paciente y de factores propios de la intervención quirúrgica. Pero algunos factores, principalmente psicológicos y psicosociales, pueden ser importantes cuando analizamos la sintomatología del paciente, el riesgo de complicaciones crónicas y la resolución de los síntomas. Se conoce muy poco sobre qué potencial predictivo tienen las alteraciones psicológicas preoperatorias so...

  3. Estudio comparativo entre el uso de N – 2 butilcianoacrilato modificado y Vicryl 4 – 0 para el cierre de colgajos en cirugía de terceros molares Inferiores retenidos

    José Ignacio Serrano; Guillermo Alberto Lanas Teran

    2014-01-01

    La extracción quirúrgica de los terceros molares supone la síntesis de los tejidos incididos previamente. El método de síntesis más utilizado en la práctica diaria del Cirujano Oral es la sutura con materiales convencionales guiados por una aguja para favorecer la cicatrización por primera intención, sin embargo, en la actualidad se ha puesto en boga la utilización de materiales adhesivos a base de Cianoacrilato para reemplazar las suturas convencionales, con el objetivo de disminuir el dolor...

  4. Removal of Deeply Impacted Mandibular Molars by Sagittal Split Osteotomy

    Erol Cansiz

    2016-01-01

    Full Text Available Mandibular third molars are the most common impacted teeth. Mandibular first and second molars do not share the same frequency of occurrence. In rare cases the occlusal surfaces of impacted molars are united by the same follicular space and the roots pointing in opposite direction; these are called kissing molars. In some cases, a supernumerary fourth molar can be seen as unerupted and, in this case, such a supernumerary, deeply impacted fourth molar is seen neighboring kissing molars. The extraction of deeply impacted wisdom molars from the mandible may necessitate excessive bone removal and it causes complications such as damage to the inferior alveolar nerve and iatrogenic fractures of the mandible. This case report describes the use of the sagittal split osteotomy technique to avoid extensive bone removal and protect the inferior alveolar nerve during surgical extruction of multiple impacted teeth.

  5. The anesthetic effects of Gow-Gates technique of inferior alveolar nerve block in impacted mandibular third molar extraction%Gow-Gates法下牙槽神经阻滞麻醉在下颌阻生第三磨牙拔除术中的麻醉效果研究

    杨介平; 刘伟; 高庆红

    2013-01-01

    目的 通过临床随机对照试验的方法评价Gow-Gates法下牙槽神经阻滞麻醉在下颌阻生第三磨牙拔除术中的麻醉有效性和安全性.方法 使用左右半口设计,32例患者的左右下颌阻生第三磨牙分别随机采用Gow-Gates法和传统注射法进行下牙槽神经阻滞麻醉,并拔除下颌阻生第三磨牙,记录麻醉效果及不良事件.结果 所有患者均完成研究.Gow-Gates法的麻醉成功率为96.9%,传统注射法的麻醉成功率为90.6%,二者的麻醉成功率无统计学差异(P=0.317).在麻醉程度上,Gow-Gates法麻醉程度为A和B级的比率为96.9%,明显好于传统注射法的78.1%(P=0.034).Gow-Gates法的回抽出血率明显低于传统注射法(P=0.025),2种注射方法均未出现血肿.结论 Gow-Gates法下牙槽神经阻滞麻醉在下颌阻生第三磨牙拔除术中的麻醉效果好且较为安全,可以作为传统注射法的有效补充.%Objective To evaluate the anesthetic effects and safety of Gow-Gates technique of inferior alveolar nerve block in impacted mandibular third molar extraction.Methods A split-mouth study was designed.The bilateral impacted mandibular third molar of 32 participants were divided into Gow-Gates technique of inferior alveolar nerve block (Gow-Gates group) and conventional technique of inferior alveolar nerve block (conventional group) randomly with third molar extracted.The anesthetic effects and adverse events were recorded.Results All the participants completed the research.The anesthetic success rate was 96.9% in Gow-Gates group and 90.6% in conventional group with no statistical difference(P=0.317); but when comparing the anesthesia grade,Gow-Gates group had a 96.9% of grade A and B,and conventional group had a rate of 78.1%(P=0.034).And the Gow-Gates group had a much lower withdrawn bleeding than conventional group(P=0.025).Two groups had no hematoma.Conclusion Gow-Gates technique had a reliable anesthesia effects and safety in

  6. 正畸牵引法辅助拔除接触下牙槽神经管的埋伏阻生牙1例报告%Orthodontic-assisted extraction of impacted lower third molar compressing to the inferior alveolar nerve: A case report

    谢千阳; 马志贵; 钱文涛; 徐光宙; 蔡协艺; 杨驰

    2012-01-01

    Extraction of impacted lower third molar is a common procedure. Damage of the inferior alveolar nerve (IAN) is one of the severe complications, in that the roots of the tooth are often close to the nerve canal when it is impacted at a low position. There are mainly three approaches: coronectomy, partial odontoectomy and orthodontic extraction to minimize neurological risks. A case of mesioangular impacted third molar treated with improved orthodontic extraction was reported in this paper. The orthodontic treatment consisted 2 stages, up-righting and extrusion. Supported by 2011 Medical Research Project of Health Bureau of Pudong New District of Shanghai Mumcipality(PW2011D-4).%阻生下颌第三磨牙拔除是口腔颌面外科的一种常见手术.由于低位阻生的下颌第三磨牙牙根位置常与下牙槽神经(inferior alveolar nerve,IAN)关系密切,神经损伤是该手术的严重并发症之一.目前,国际上主要有3种避免IAN损伤的方法:截冠法、部分牙冠切除术和正畸牵引法.本文报告1例下颌第三磨牙近中斜位低位阻生的患者,采用改良正畸牵引法,分两步将牙根牵离神经管,牵引完成后顺利拔除患牙.

  7. 下颌第三磨牙拔除时下牙槽动脉出血的风险评估及急救处理%Risk assessment and first aid treatment for bleeding of inferior alveolar artery during extraction of mandibular third molar

    兰雪松; 韩泽民

    2015-01-01

    Obsjective To assess the risk of and first aid treatment for bleeding of inferior alveolar artery during extraction ofmandibular third molar surgery through panoramic radiographic findings,and summarize bleeding. Methods Three hundred and thirty cases with impacted mandibular third molars underwent pantomography to analyze the relationship between tooth root and the inferior alveolar canal (IAC). The cases were divided into 4 types using the IAC as a reference and the bleeding cases were recorded during the third molar surgry. Results Out of the 330 cases 20 suffered from bleeding of inferior alveolar artery during surgery(20/330, 6.1%). The bleeding rate of the type 1 group was 3.0%(5/167)and the bleedinbg rate of the type 2 group was 5.7%( 6/105), both significantly lower than that of the type 3 group ,and 9 cases in the group of type 3(9/54).No bleeding cases was found in the group of type 4.Statiscal analysis showed there was significant differenc between type 1 and type 3 and type 2 and type 3(χ2 test,(P0.05).Conclusion At panoramic radiograph,the nearer the tooth root of mandibular third molars is to the IAC,the more easily inferior alveolar artery bleed during mandibular third molar surgery.It is important to analyse the adiographic signs of patients with impacted mandibular third molars before extraction and take preparation for bleeding of of inferior alveolar artery during mandibular third molar surgery.%目的:通过术前曲面体层片检查,评估下颌第三磨牙拔除术中发生下牙槽动脉出血的几率,概述出血发生时的急救处理。方法收集330例术前行曲面体层片检查的下颌阻生第三磨牙拔除患者,通过曲面体层片分析牙根与下颌管的位置关系,以下颌管为参照,将阻生牙分为4类,统计各类术中发生下牙槽动脉出血的例数,应用SPSS 20.0软件包对数据进行χ2检验,分析易导致下牙槽动脉出血的阻生类型。结果共有20例发生下牙槽

  8. 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

    Atihe, Mauricio Martins

    2002-07-01

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

  9. Deciduous molar hypomineralization and molar incisor hypomineralization

    Elfrink, M.E.C.; ten Cate, J.M.; Jaddoe, V.W.V.; Hofman, A.; Moll, H.A.; Veerkamp, J.S.J.

    2012-01-01

    This study was embedded in the Generation R Study, a population-based prospective cohort study from fetal life until young adulthood. This study focused on the relationship between Deciduous Molar Hypomineralization (DMH) and Molar Incisor Hypomineralization (MIH). First permanent molars develop dur

  10. Estudio anatómico del tercer molar mandibular incluido

    Larrazabal Morón, Carolina

    2015-01-01

    Los terceros molares son los últimos dientes en erupcionar, debido a ello no encuentran suficiente espacio para establecerse en el arco dentario, por lo que fácilmente pueden quedar retenidos. El diagnóstico inadecuado del tercer molar inferior incluido puede ser causa de numerosas complicaciones como infecciones odontogénicas, tumores benignos, malignos, caries dental entre otros. Por ello el objetivo de este estudio es conocer el desarrollo del tercer molar mandibular, analizar los c...

  11. Coronectomy of deeply impacted lower third molar: incidence of outcomes and complications after one year follow-up

    Jimoh Olubanwo Agbaje; Guido Heijsters; Ahmed Sobhy Salem; Sarah Van Slycke; Serge Schepers; Constantinus Politis; Luc Vrielinck

    2015-01-01

    ABSTRACT Objectives The purpose of present study was to assess the surgical management of impacted third molar with proximity to the inferior alveolar nerve and complications associated with coronectomy in a series of patients undergoing third molar surgery. Material and Methods The position of the mandibular canal in relation to the mandibular third molar region and mandibular foramen in the front part of the mandible (i.e., third molar in close proximity to the inferior alveolar nerve [IAN]...

  12. Clinical significance of computed tomography assessment for third molar surgery

    Kenji; Nakamori; Kei; Tomihara; Makoto; Noguchi

    2014-01-01

    Surgical extraction of the third molar is the most commonly performed surgical procedure in the clinical practice of oral surgery.Third molar surgery is warranted when there is inadequate space for eruption,malpositioning,or risk for cyst or odontogenic tumor formation.Preoperative assessment should include a detailed morphologic analysis of the third molar and its relationship to adjacent structures and surrounding tissues.Due to developments in medical engineering technology,computed tomography(CT)now plays a critical role in providing the clear images required for adequate assessment prior to third molar surgery.Removal of the maxillary third molar is associated with a risk for maxillary sinus perforation,whereas removal of the mandibular third molar can put patients at risk for a neurosensory deficit from damage to the lingual nerve or inferior alveolar nerve.Multiple factors,including demographic,anatomic,and treatment-related factors,influence the incidence of nerve injury during or following removal of the third molar.CT assessment of the third molar prior to surgery can identify some of these risk factors,such as the absence of cortication between themandibular third molar and the inferior alveolar canal,prior to surgery to reduce the risk for nerve damage.This topic highlight presents an overview of the clinical significance of CT assessment in third molar surgery.

  13. Clinical significance of computed tomography assessment for third molar surgery.

    Nakamori, Kenji; Tomihara, Kei; Noguchi, Makoto

    2014-07-28

    Surgical extraction of the third molar is the most commonly performed surgical procedure in the clinical practice of oral surgery. Third molar surgery is warranted when there is inadequate space for eruption, malpositioning, or risk for cyst or odontogenic tumor formation. Preoperative assessment should include a detailed morphologic analysis of the third molar and its relationship to adjacent structures and surrounding tissues. Due to developments in medical engineering technology, computed tomography (CT) now plays a critical role in providing the clear images required for adequate assessment prior to third molar surgery. Removal of the maxillary third molar is associated with a risk for maxillary sinus perforation, whereas removal of the mandibular third molar can put patients at risk for a neurosensory deficit from damage to the lingual nerve or inferior alveolar nerve. Multiple factors, including demographic, anatomic, and treatment-related factors, influence the incidence of nerve injury during or following removal of the third molar. CT assessment of the third molar prior to surgery can identify some of these risk factors, such as the absence of cortication between the mandibular third molar and the inferior alveolar canal, prior to surgery to reduce the risk for nerve damage. This topic highlight presents an overview of the clinical significance of CT assessment in third molar surgery.

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

    C. López Carriches

    2008-10-01

    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.

  15. Bilateral inferior turbinate osteoma

    Sahemey, R.; Warfield, A.T.; Ahmed, S.

    2016-01-01

    Osteomas are the most common benign osteoclastic tumours of the paranasal sinuses. However, nasal cavity and turbinate osteomas are extremely rare. Only nine middle turbinate, three inferior turbinate and one inferior turbinate osteoma cases have been reported to date. The present case report describes the management and follow-up of symptomatic bilateral inferior turbinate osteoma. A 60-year-old female presented with symptoms of bilateral nasal obstruction and right-sided epiphora. Radiological investigation found hypertrophic bony changes involving both inferior turbinates. The patient was managed successfully by endoscopic inferior turbinectomies in order to achieve a patent airway, with no further recurrence of tumour after 3 months postoperatively. To the best of our knowledge, this is the first reported case of bilateral inferior turbinate osteoma. We describe a safe and minimally invasive method of tumour resection, which has a better cosmetic outcome compared with other approaches. PMID:27534890

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

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

    2008-01-01

    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...

  17. Deciduous molar hypomineralization and molar incisor hypomineralization.

    Elfrink, M E C; ten Cate, J M; Jaddoe, V W V; Hofman, A; Moll, H A; Veerkamp, J S J

    2012-06-01

    This study was embedded in the Generation R Study, a population-based prospective cohort study from fetal life until young adulthood. This study focused on the relationship between Deciduous Molar Hypomineralization (DMH) and Molar Incisor Hypomineralization (MIH). First permanent molars develop during a period similar to that of second primary molars, with possible comparable risk factors for hypomineralization. Children with DMH have a greater risk of developing MIH. Clinical photographs of clean, moist teeth were taken with an intra-oral camera in 6,161 children (49.8% girls; mean age 74.3 mos, SD ± 5.8). First permanent molars and second primary molars were scored with respect to DMH or MIH. The prevalence of DMH and MIH was 9.0% and 8.7% at child level, and 4.0% and 5.4% at tooth level. The Odds Ratio for MIH based on DMH was 4.4 (95% CI, 3.1-6.4). The relationship between the occurrence of DMH and MIH suggests a shared cause and indicates that, clinically, DMH can be used as a predictor for MIH.

  18. A contrast study of two different block anesthesia of inferior alveolar nerve used for the extraction of impacted mandibular third-molar%两种不同下牙槽神经阻滞麻醉方法用于下颌阻生第三磨牙拔除术的对比研究

    张国权; 张国志; 翁汝涟; 汤剑明; 徐敏

    2011-01-01

    Objective:To discuss a more effective method of block anesthesia of inferior alveolar nerve. Method: ISO cases of patients who need extraction of the impacted mandibular third-molar by opening flapping and deboning were selected and divided randomly into three groups: Experimental group (50 cases) with Cow-Gates mandibular block, control group one (50 cases) with block anesthesia of internal ramus prominence and control group two (50 cases) with extra infiltration anesthesia of buccal mesiocclusion and distocclusion and lingual side of offending teeth after the same injection method as control group one. The pain situation was observed by Visual Analogue Scale. All the three groups used the arti-caine hydrochlorine and epinephrine tartrate injection. Result: The cases performed Gow-Gates mandibular block showed less pain than control group one, but contrast to control group two, the method showed no superiority. Conclusion: The conventional block anesthesia of internal ramus prominence added with local infiltration anesthesia could enhance the success ratio of block anesthesia of inferior alveolar nerve effectively and achieve the same effect as Gow-Gates mandibular block.%目的:探讨一种更加有效的下齿槽神经阻滞麻醉的方法。方法:随机选取需翻瓣去骨法拔除下颌阻生第三磨牙患者150例。实验组50例,采用Gow-Gates法阻滞麻醉,对照一组50例,采用下颌支内侧隆突阻滞麻醉,对照二组在采用对照组一的方法注射后保留少量局麻药加用患牙颊侧近远中及舌侧三点浸润麻醉。采用VAS评分法观察疼痛情况。三组病例均使用阿替卡因肾上腺素注射液。结果:与对照一组相比,采用Gow-Gates法阻滞麻醉的病例疼痛明显减轻,但是与对照二组相比,该法没有明显优势。结论:传统的下颌支内侧隆突阻滞麻醉加用局部浸润麻醉可以有效提高下牙槽神经阻滞麻醉的成功率,达到与Gow-Gates阻滞麻醉相同的麻醉效果。

  19. Coronectomy - A viable alternative to prevent inferior alveolar nerve injury

    Alok Sagtani

    2015-12-01

    Full Text Available Background and Objectives: Coronectomy is a relatively new method to prevent the risk of Inferior Alveolar Nerve (IAN injury during removal of lower third molars with limited scientific literature among Nepalese patients. Thus, a study was designed to evaluate coronectomy regarding its use, outcomes and complications.Materials and Methods: A descriptive study was conducted from December 2012 to December 2013 among patients attending Department of Oral and Maxillofacial Surgery, College of Dental Sciences, BP Koirala Institute of Health Sciences, Dharan, Nepal for removal of mandibular third molars. After reviewing the radiograph for proximity of third molar to the IAN, coronectomy was advised. A written informed consent was obtained from the patients and coronectomy was performed. Patients were recalled after one week. The outcome measures in the follow-up visit were primary healing, pain, infection, dry socket, root exposure and IAN injury. The prevalence of IAN proximity of lower third molars and incidence of complications were calculated.Results: A total 300 mandibular third molars were extracted in 278 patients during the study period. Out of 300 impacted mandibular third molar, 41 (13.7% showed close proximity to inferior alveolar nerve . The incidence of complications and failed procedure was 7.4% among the patients who underwent coronectomy. During the follow up visit, persistent pain and root exposure was reported while other complications like inferior alveolar nerve injury, dry socket and infection was not experienced by the study patients.Conclusion: With a success rate of 92.6% among the 41 patients, coronectomy is a viable alternative to conventional total extraction for mandibular third molars who have a higher risk for damage to the inferior alveolar nerve.JCMS Nepal. 2015;11(3:1-5.

  20. COMPLICATIONS AFTER EXTRACTION OF IMPACTED THIRD MOLARS - LITERATURE REVIEW

    Elitsa G. Deliverska; Milena Petkova

    2016-01-01

    Third molar surgery is the most common procedure performed by oral and maxillofacial surgeons worldwide. This article addresses the incidence of specific complications and, where possible, offers a preventive or management strategy. Complications, such as pain, dry socket, swelling, paresthesia of the lingual or inferior alveolar nerve, bleeding, and infection are most common. Factors thought to influence the incidence of complications after third molar removal include age, gender, medical hi...

  1. ["Molar-incisor hypomineralization"].

    Kellerhoff, Nadja-Marina; Lussi, Adrian

    2004-01-01

    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

  2. Mandibular alveolar neurovascular bundle injury associated with impacted third molar surgery.

    Ruga, Emanuele; Gallesio, Cesare; Boffano, Paolo

    2010-07-01

    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 between the tooth and neurovascular bundle is suggested by a radiotransparent band across the roots of the impacted third molar on panoramic radiograph. We present the management of a patient with IANB damage associated with third molar surgery.

  3. COMPLICATIONS AFTER EXTRACTION OF IMPACTED THIRD MOLARS - LITERATURE REVIEW

    Elitsa G. Deliverska

    2016-07-01

    Full Text Available Third molar surgery is the most common procedure performed by oral and maxillofacial surgeons worldwide. This article addresses the incidence of specific complications and, where possible, offers a preventive or management strategy. Complications, such as pain, dry socket, swelling, paresthesia of the lingual or inferior alveolar nerve, bleeding, and infection are most common. Factors thought to influence the incidence of complications after third molar removal include age, gender, medical history, oral contraceptives, presence of pericoronitis, poor oral hygiene, smoking, type of impaction, relationship of third molar to the inferior alveolar nerve, surgical time, surgical technique, surgeon experience, use of perioperative antibiotics, use of topical antiseptics, use of intra-socket medications, and anaesthetic technique. For the general dental practitioner, as well as the oral and maxillofacial surgeon, it is important to be familiar with all the possible complications after this procedure. This improves patient education and leads to prevention, early recognition and management.

  4. Varices en Miembros Inferiores

    Velásquez, Edna

    2015-01-01

    Insuficiencia venosa, es cuando las venas de las extremidades inferiores no son capaces de devolver al corazón toda la sangre que les llega y de hacerlo al ritmo y velocidad debidos, se puede afirmar que sufren insuficiencia venosa.

  5. Inferior alveolar nerve paresthesia relieved by microscopic endodontic treatment.

    Yatsuhashi, Takaaki; Nakagawa, Kan-Ichi; Matsumoto, Miho; Kasahara, Masataka; Igarashi, Tomoko; Ichinohe, Tatsuya; Kaneko, Yuzuru

    2003-11-01

    We experienced two cases of inferior alveolar nerve paresthesia caused by root canal medicaments, which were successfully relieved by microscopic endodontic treatment. In the first case, the paresthesia might have been attributable to infiltration of calcium hydroxide into the mandibular canal through the root canals of the mandibular left second molar tooth. In the second case, the paresthesia might have been attributable to infiltration of paraformaldehyde through the root canals of the mandibular right second molar tooth. The paresthesia was relieved in both cases by repetitive microscopic endodontic irrigation using physiological saline solution in combination with oral vitamin B12 and adenosine triphosphate.

  6. Incarcerated inferior lumbar (Petit's) hernia.

    Astarcioğlu, H; Sökmen, S; Atila, K; Karademir, S

    2003-09-01

    Petit's hernia is an uncommon abdominal wall defect in the inferior lumbar triangle. Colonic incarceration through the inferior lumbar triangle, which causes mechanical obstructive symptoms, necessitates particular diagnostic and management strategy. We present a rare case of inferior lumbar hernia, leading to mechanical bowel obstruction, successfully treated with prosthetic mesh reinforcement repair.

  7. Third molar infections.

    Gutiérrez-Pérez, José Luis

    2004-01-01

    Pericoronitis is an infectious disease often associated with the eruption of a third molar. It can be either acute (serous and suppurative) or chronic. Pain is usually the predominant symptom in acute stages, whereas chronic forms of the disease may display very few symptoms. Both present exudate. The infection is multimicrobial, predominantly caused strictly by betalactamase-producing anaerobeic microorganisms. Treatment measures are symptomatic, antimicrobial and surgical. Antimicrobial treatment is indicated for preoperative prophylaxis when there is a high risk of postoperative infection and, during the acute stages of suppurative pericoronitis when surgery must be postponed. First-line treatment in this case consists of amoxicillin with associated clavulanic acid. Although surgical treatment of pericoronitis presenting at the third molar is indicated as a Grade C recommendation for extraction, it is the most common indication for extraction of a retained third molar, owing to the improved quality of life it can offer the patient.

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

    G Raghavendra Prasad

    2013-01-01

    Full Text Available 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.

  9. Coronectomy of impacted mandibular third molars: A meta-analysis and systematic review of the literature

    Cervera-Espert*, Juan; Pérez-Martínez*, Sara; Cervera-Ballester, Juan; Penarrocha-Oltra, David

    2016-01-01

    Background Coronectomy is an alternative to complete removal of an impacted mandibular third molar. Most authors have recommended coronectomy to prevent damage to the inferior alveolar nerve during surgical extraction of lower third molars. The present study offers a systematic review and metaanalysis of the coronectomy technique. Material and Methods A systematic review and meta-analysis was performed based on a PubMed and Cochrane databases search for articles published from 2014 and involving coronectomy of mandibular third molars located near the inferior alveolar nerve canal, with a minimum of 10 cases and a minimum follow-up period of 6 months. After application of the inclusion and exclusion criteria, a total of 12 articles were included in the study. Results and Discussion Coronectomy results in significantly lesser loss of sensitivity of the inferior alveolar nerve and prevents the occurrence of dry socket. No statistically significant differences were observed in the incidence of pain and infection between coronectomy and complete surgical extraction. After coronectomy, the remaining tooth fragment migrates an average of 2 mm within two years. Conclusions Coronectomy is indicated when the mandibular third molar is in contact with the inferior alveolar nerve and complete removal of the tooth may cause nerve damage. Key words:Coronectomy, included third molar, inferior alveolar nerve injury. PMID:27031064

  10. Traumatic neuroma of the inferior alveolar nerve: a case report.

    Arribas-García, Ignacio; Alcalá-Galiano, Andrea; Gutiérrez, Ramón; Montalvo-Moreno, Juan José

    2008-03-01

    Traumatic neuromas are rare entities which characteristically arise subsequently to surgery and are usually accompanied by pain, typically neuralgic. We present an unusual case of an intraosseous traumatic neuroma of the inferior alveolar nerve following tooth extraction. A 56-year-old man consulted for paresthesias and hyperesthesia in the left mandibular region following extraction of the left mandibular third molar (#38). The panoramic radiograph revealed a radiolucent lesion in the inferior alveolar nerve canal, and CT demonstrated the existence of a mass within the canal, producing widening of the same. Nerve-sparing excisional biopsy was performed. Histopathology and immunohistochemistry were consistent with traumatic neuroma of the left inferior alveolar nerve. After 3 years of follow-up, the patient is asymptomatic and there are no signs of recurrence.

  11. Hypomineralized Second Primary Molars as Predictor of Molar Incisor Hypomineralization

    Negre-Barber, A.; Montiel-Company, J. M.; Boronat-Catalá, M.; M. Catalá-Pizarro; Almerich-Silla, J. M.

    2016-01-01

    Molar incisor hypomineralization (MIH) is a developmental defect of dental enamel that shares features with hypomineralized second primary molars (HSPM). Prior to permanent tooth eruption, second primary molars could have predictive value for permanent molar and incisor hypomineralization. To assess this possible relationship, a cross-sectional study was conducted in a sample of 414 children aged 8 and 9 years from the INMA cohort in Valencia (Spain). A calibrated examiner (linear-weighted Ka...

  12. Coronectomy of Deeply Impacted Lower Third Molar: Incidence of Outcomes and Complications after One Year Follow-Up

    Jimoh Olubanwo Agbaje

    2015-06-01

    Full Text Available Objectives: The purpose of present study was to assess the surgical management of impacted third molar with proximity to the inferior alveolar nerve and complications associated with coronectomy in a series of patients undergoing third molar surgery. Material and Methods: The position of the mandibular canal in relation to the mandibular third molar region and mandibular foramen in the front part of the mandible (i.e., third molar in close proximity to the inferior alveolar nerve [IAN] or not was identified on panoramic radiographs of patients scheduled for third molar extraction. Results: Close proximity to the IAN was observed in 64 patients (35 females, 29 males with an impacted mandibular third molar. Coronectomy was performed in these patients. The most common complication was tooth migration away from the mandibular canal (n = 14, followed by root exposure (n = 5. Re-operation to remove the root was performed in cases with periapical infection and root exposure. Conclusions: The results indicate that coronectomy can be considered a reasonable and safe treatment alternative for patients who demonstrate elevated risk for injury to the inferior alveolar nerve with removal of the third molars. Coronectomy did not increase the incidence of damage to the inferior alveolar nerve and would be safer than complete extraction in situations in which the root of the mandibular third molar overlaps or is in close proximity to the mandibular canal.

  13. Efficacy of nimesulide versus meloxicam in the control of pain, swelling and trismus following extraction of impacted lower third molar.

    De Menezes, S A F; Cury, P R

    2010-06-01

    This study compared the efficacy of nimesulide and meloxicam in the control of pain, swelling and trismus, following the extraction of impacted inferior third molars. Twenty patients with two impacted inferior third molars, in similar positions, were selected. The patients were designated randomly to the meloxicam group (MEL: 7.5mg twice a day for 5 days) or the nimesulide group (NIM: 100mg for 5 days). Following the extractions, swelling was more pronounced in the MEL group than in the NIM group (P0.05). At the 72-h evaluation, reduction was significantly larger in mouth opening in the MEL group compared with the NIM group (Pimpacted lower third molars.

  14. Relationship between lower third molar and mandibular canal; Preoperative evaluation using CT scan

    Itou, Masaki; Miyagishima, Toshio; Onizuka, Hiroyuki (Fujieda City Shida General Hospital, Shizuoka (Japan)); Takagi, Norio

    1994-01-01

    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).

  15. Inferior alveolar nerve paresthesia caused by a dentigerous cyst associated with three teeth.

    Sumer, Mahmut; Baş, Burcu; Yildiz, Levent

    2007-09-01

    The dentigerous cyst is a common pathologic entity associated with an impacted tooth, usually third molars. They generally are asymptomatic, being found on routine dental radiographic examination. This report describes the case of a 43 year old male with a large dentigerous cyst associated with mandibular canine, first and second premolar teeth that caused paresthesia of the inferior alveolar nerve.

  16. Molar Incisor Hypomineralization.

    Rao, Murali H; Aluru, Srikanth C; Jayam, Cheranjeevi; Bandlapalli, Anila; Patel, Nikunj

    2016-07-01

    Molar incisor hypomineralization (MIH) is a developmental defect affecting teeth. High prevalence rates of MIH and its clinical implications are significant for both the patients and clinicians. A wide variation in defect prevalence (2.4-40.2%) is reported. It seems to differ with regions and various birth cohorts. Some of the recent prevalence studies are tabulated. Patient implications include hypersensitive teeth, rapid progression of caries, mastication impairment due to rapid attrition, and esthetic repercussions. Implications for clinicians include complexity in treatment planning and treatment implementation, poor prognosis of the restorations, difficulty in achieving pain control during treatment, and behavior management problems. Intention of this paper is to review the etio-pathogenesis, prevalence, clinical features, diagnostic features, and eventually present a sequential treatment approach, i.e., in accordance with current clinical practice guidelines.

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

    Gintaras Juodzbalys

    2013-06-01

    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.

  18. Timing of Histologic Progression from Chorio-Deciduitis to Chorio-Deciduo-Amnionitis in the Setting of Preterm Labor and Preterm Premature Rupture of Membranes with Sterile Amniotic Fluid.

    Chan-Wook Park

    Full Text Available Histologic chorio-deciduitis and chorio-deciduo-amnionitis (amnionitis in extra-placental membranes are known to represent the early and advanced stages of ascending intra-uterine infection. However, there are no data in humans about the time required for chorio-deciduitis to develop and for chorio-deciduitis without amnionitis to progress to chorio-deciduitis with amnionitis, and the effect of prolongation of pregnancy on the development of chorio-deciduitis and amnionitis in patients with preterm labor and intact membranes (PTL and preterm premature rupture of membranes (preterm-PROM. We examined these issues in this study.The study population consisted of 289 women who delivered preterm (133 cases with PTL, and 156 cases with preterm-PROM and who had sterile amniotic fluid (AF defined as a negative AF culture and the absence of inflammation as evidenced by a matrix metalloproteinase-8 (MMP-8 level <23 ng/ml. We examined the association between amniocentesis-to-delivery interval and inflammatory status in the extra-placental membranes (i.e., inflammation-free extra-placental membranes, choroi-deciduitis only, and chorio-deciduitis with amnionitis in patients with PTL and preterm-PROM.Amniocentesis-to-delivery interval was longer in cases of chorio-deciduitis with amnionitis than in cases of chorio-deciduitis only in both PTL (median [interquartile-range (IQR]; 645.4 [319.5] vs. 113.9 [526.9] hours; P = 0.005 and preterm-PROM (131.3 [135.4] vs. 95.2 [140.5] hours; P<0.05. Amniocentesis-to-delivery interval was an independent predictor of the development of both chorio-deciduitis and amnionitis after correction for confounding variables such as gestational age at delivery in the setting of PTL, but not preterm-PROM.These data confirm for the first time that, in cases of both PTL and preterm-PROM with sterile AF, more time is required to develop chorio-deciduitis with amnionitis than chorio-deciduitis alone in extra-placental membranes. Moreover

  19. Noninverted images in inferior mirages

    van der Werf, S.Y.

    2011-01-01

    Inferior mirages over sun-exposed roads often appear in isolated strips at their near sides and the reflected scenery exhibits multiple images. This effect is explained as due to slight undulations of the road's surface. At the same time, some of these images, although they are reflections, are not

  20. Intraosseous schwannoma originating in inferior alveolar nerve: a case report.

    Suga, Kenichiro; Ogane, Satoru; Muramatsu, Kyotaro; Ohata, Hitoshi; Uchiyama, Takeshi; Takano, Nobuo; Shibahara, Takahiko; Eguchi, Jun; Murakami, Satoshi; Matsuzaka, Kenichi

    2013-01-01

    Schwannomas (neurilemmomas) are benign neoplasms derived from Schwann cells of the neurilemma and appear most frequently on the auditory nerve or peripheral nerves of the skin. They arise in the oral and maxillofacial region infrequently, and very rarely in the center of the jaw. We herein present a case of a rare mandibular intraosseous schwannoma derived from the main trunk of the inferior alveolar nerve in a 33-year-old man. Fusiform expansion in the mandibular canal was observed and a mass showing the target sign in the mandibular canal was confirmed on T2-weighted and Gd contrastenhanced T1-weighted MRI. Based on these findings, an inferior alveolar nerve-derived schwannoma or other benign nervous system neoplasm was diagnosed. A buccal side cortical bone flap in the mandibular molar region was removed to expose the mass, which was then peeled away from the nerve fibers and completely removed. Some inferior alveolar nerve fibers that were connected to the mass were removed at the same time, but the remaining nerve fiber bundle was preserved. Histopathology confirmed the diagnosis of a schwannoma with Antoni type A and Antoni type B regions. Although the patient experienced extremely mild paresthesia in the skin over the mental region and mental foramen at immediately after surgery, this had almost entirely disappeared at 7 years and 4 months later, and there has been no tumor recurrence.

  1. 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

    Veit M. Dörken

    2009-12-01

    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.

  2. Hypomineralized Second Primary Molars as Predictor of Molar Incisor Hypomineralization.

    Negre-Barber, A; Montiel-Company, J M; Boronat-Catalá, M; Catalá-Pizarro, M; Almerich-Silla, J M

    2016-08-25

    Molar incisor hypomineralization (MIH) is a developmental defect of dental enamel that shares features with hypomineralized second primary molars (HSPM). Prior to permanent tooth eruption, second primary molars could have predictive value for permanent molar and incisor hypomineralization. To assess this possible relationship, a cross-sectional study was conducted in a sample of 414 children aged 8 and 9 years from the INMA cohort in Valencia (Spain). A calibrated examiner (linear-weighted Kappa 0.83) performed the intraoral examinations at the University of Valencia between November 2013 and 2014, applying the diagnostic criteria for MIH and HSPM adopted by the European Academy of Paediatric Dentistry. 100 children (24.2%) presented MIH and 60 (14.5%) presented HSPM. Co-occurrence of the two defects was observed in 11.1% of the children examined. The positive predictive value was 76.7% (63.9-86.6) and the negative predictive value 84.7% (80.6-88.3). The positive likelihood ratio (S/1-E) was 10.3 (5.9-17.9) and the negative likelihood ratio (1-S/E) 0.57 (0.47-0.68). The odds ratio was 18.2 (9.39-35.48). It was concluded that while the presence of HSPM can be considered a predictor of MIH, indicating the need for monitoring and control, the absence of this defect in primary dentition does not rule out the appearance of MIH.

  3. Efficacy and complications associated with a modified inferior alveolar nerve block technique. A randomized, triple-blind clinical trial

    Montserrat-Bosch, Marta; Nogueira-Magalhães, Pedro; Arnabat-Dominguez, Josep; Valmaseda-Castellón, Eduard; Gay-Escoda, Cosme

    2014-01-01

    Objectives: To compare the efficacy and complication rates of two different techniques for inferior alveolar nerve blocks (IANB). Study Design: A randomized, triple-blind clinical trial comprising 109 patients who required lower third molar removal was performed. In the control group, all patients received an IANB using the conventional Halsted technique, whereas in the experimental group, a modified technique using a more inferior injection point was performed. Results: A total of 100 patients were randomized. The modified technique group showed a significantly higher onset time in the lower lip and chin area, and was frequently associated to a lingual electric discharge sensation. Three failures were recorded, 2 of them in the experimental group. No relevant local or systemic complications were registered. Conclusions: Both IANB techniques used in this trial are suitable for lower third molar removal. However, performing an inferior alveolar nerve block in a more inferior position (modified technique) extends the onset time, does not seem to reduce the risk of intravascular injections and might increase the risk of lingual nerve injuries. Key words:Dental anesthesia, inferior alveolar nerve block, lidocaine, third molar, intravascular injection. PMID:24608204

  4. Tuberculosis pulmonar de campos inferiores

    Alejandra González; Marcelo Fernández Casares; Matías Baldini; Alfredo Monteverde

    2010-01-01

    La tuberculosis (TB) que compromete sólo los campos pulmonares inferiores (TBCI) es poco frecuente en el adulto y en general está asociada a alguna causa de inmunodepresión. El objetivo de nuestro trabajo fue determinar la incidencia de TBCI en nuestra población y comparar sus características respecto de la TB pulmonar de localización habitual. Se estudiaron en forma retrospectiva en el período de 2004 a 2008, 42 pacientes con TBCI que fueron comparados con 84 pacientes con TB pulmonar de loc...

  5. Clinical relevance of cone beam computed tomography in mandibular third molar removal: A multicentre, randomised, controlled trial

    Ghaeminia, H.; Gerlach, N.L.; Hoppenreijs, T.J.; Kicken, M.; Dings, J.P.; Borstlap, W.A.; Haan, T. de; Berge, S.J.; Meijer, G.J.; Maal, T.J.J.

    2015-01-01

    PURPOSE: The aims of this study were to investigate the effectiveness of cone beam computed tomography (CBCT) compared to panoramic radiography (PR), prior to mandibular third molar removal, in reducing patient morbidity, and to identify risk factors associated with inferior alveolar nerve (IAN) inj

  6. Neurovascular plexus theory for "escape pain phenomenon" in lower third molar surgery

    Gururaj Arakeri

    2015-06-01

    Full Text Available Pain during extraction of impacted mandibular third molars which can occur despite adequate local anesthesia is termed as "escape pain phenomenon". Recently, it was described during elevation of a mesioangular impacted mandibular third molar and also while curetting an extracted third molar socket. This phenomenon has been overlooked, as it was previously considered secondary to pressure effect on the inferior alveolar neurovascular bundle (IANB. However, it is unlikely that the pain impulses originate from direct pressure on the IANB, as the nerve is blocked more proximally at its entry into the mandible. The authors speculated that the occasional presence of a neurovascular plexus (NVP independent of the IANB causes the escape of a pain impulse upon stimulation by root pressure or instrumentation. To validate the presence of such a plexus, a meticulous literature search and review were performed. The search revealed evidence of the occasional presence of a NVP consisting of auriculotemporal and/or retromolar neural filaments. The plexus may be present around the inferior alveolar artery or embedded within the IANB, and does not innervate the tooth. This plexus likely propagates pain impulses only upon stimulation by compression or instrumentation in the apical area of the tooth socket. This theory explains the absence of pain during tooth sectioning and bone guttering in the presence of a complete inferior alveolar nerve block.

  7. Early extraction: a silver bullet to avoid nerve injury in lower third molar removal?

    Zhang, Q-B; Zhang, Z-Q

    2012-10-01

    This retrospective study evaluated the effects of early extraction of immature lower third molar on preventing complications, particularly nerve injury following lower third molar removal. Patients were grouped according to age and radiographic results: group A (518 patients, ≤23 years, immature teeth with apical foramen not closed); group B (532 patients, >23 years, mature teeth with closed apical foramen). Group A included 230 males and 288 females (average age 17 years). In group A, 808 lower mandibular third molars were extracted bilaterally in 290 and unilaterally in 228 patients; the incidence of complications was 2.48% (20/808) (all were temporary), the incidence of nerve injury was 0%. Group B included 250 males and 282 females (average age 39 years). In group B, 810 lower third molars were extracted bilaterally in 278 and unilaterally in 254 patients; the incidence of complications was 10% (81/810), the incidence of nerve injury was 1.6% (13/810). All complications were temporary, except two removals of permanent inferior alveolar nerve numbness (>6 months). In this study, early removal of the lower third molar was effective in avoiding some postoperative complications, especially nerve injury. Early extraction of lower third molar in youngsters is recommended following a team consultation.

  8. CANINE ECTOPIC TREATMENT WITH FIRST MOLAR EXTRACTION

    Angelica Margo

    2015-06-01

    Full Text Available Decision to extract or not and the type of tooth must be analyzed carefully in orthodontic treatment. Preferable tooth to be extracted was the tooth with large caries or restoration. Usually the type of tooth to be extracted was second molar (if the third molar appears, incisor, first molar, and combination of several teeth. Orthodontic treatment with molar extraction is more difficult to treat and the result is usually compromise. There are several considerations in extracting first molar such as tooth with large caries or restoration, hypoplasia, periapical disease, large discrepancy, high maxilla-mandibular plane angle, and cases with anterior open bite. Nowadays, orthodontic cases with molar extraction do not prolong the treatment time compared to premolar extraction case, but the anchorage system must be considered carefully. The present case was treated with extraction of first molar to solve anterior crowding with maximum anchorage at the upper jaw and using Nance Holding Appliance.

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

    Santosh, P

    2015-01-01

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

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

    JEROEN STAELENS

    2011-03-01

    mineralization rates in the present study.Los ecosistemas forestales del sur de Chile presentan un gran valor ecológico pues constituyen una de las mayores áreas del hemisferio Sur con existencias de bosques templados lluviosos. Están sometidos a procesos de deforestación, invasión de especies exóticas, fragmentación e incremento de depositación de nitrógeno (N atmosférico. Para apoyar su manejo sustentable se requiere de mayor conocimiento en el ciclo de nutrientes de estos ecosistemas. Se estudia la dinámica de nutrientes en cuatro sitios de bosques lluviosos valdivianos de la precordillera de los Andes, centro-sur de Chile: un bosque siempreverde de antiguo crecimiento prístino y otro alterado, un bosque caducifolio secundario con manejo silvícola y otro sin. Durante el período octubre 2002 -septiembre 2006, se estimaron (i masa de la hojarasca (cuatro años y contenido de nutrientes de la hojarasca (un año, (ii descomposición y dinámica de nutrientes de hojarasca (un año y de la corteza de Saxegothaea conspicua, y (iii mineralización neta de nitrógeno (N-min en el suelo in situ (un año. El aporte de hojarasca en los cuatro sitios fluctúa desde 3.5 hasta 5.8 ton ha-1 año-1, y es temporalmente menor en bosque caducifolio manejado, respecto del caducifolio sin manejo. Además, presentan una estacionalidad en los siempreverdes que es diferente, respecto de los deciduos. La hojarasca se descompone más rápidamente (promedio 32 % pérdida de masa después de un año que la corteza (8 %, pero no se presentaron diferencias significativas en la hojarasca. El N neto en la hojarasca de los bosques siempreverdes disminuye durante la descomposición, pero se incrementa en la hojarasca de los deciduos. La N-mineralización neta del suelo fue completa en el bosque siempreverde prístino, intermedia en los bosques deciduos y el más baja en el bosque siempreverde alterado. Dada la ausencia de réplicas en las parcelas, no puede ser demostrado el impacto definido del

  11. Tiempo de cirugía efectiva en la extracción de los terceros molares realizadas por un cirujano oral y maxilofacial con experiencia

    Llerena García, Giselle; Facultad de Estomatología, Universidad Peruana Cayetano Heredia. Lima,; Arrascue Dulanto, Manuel; Facultad de Estomatología, Universidad Peruana Cayetano Heredia. Lima,

    2014-01-01

    Se examinaron radiográficamente 100 terceros molares inferiores indicados para extraer y setomó registro de las historias clínicas respectivas, para obtener las clasificaciones de Pell-Gregory, Winter y las formas de las raíces comparando estas variables con el tiempo de cirugíaefectiva al realizar las extracciones por un Cirujano Oral y Maxilofacial con experiencia. Eltiempo de cirugía efectiva promedio de la exodoncia del tercer molar inferior fue de 12,71 min.Se encontró con mayor frecuenc...

  12. Estudio del postoperatorio de 100 terceros molares mandibulares incluidos, en relación a la edad, el sexo, el tabaco y la higiene bucal

    1999-01-01

    La extracción del tercer molar inferior incluido provoca efectos secundarios como dolor, inflamación y trismo. Presentamos un estudio cuyo objetivo fue relacionar la edad, el sexo, el tabaco y la higiene oral con el postoperatorio de 100 de terceros molares inferiores incluidos. La edad, el sexo y el consumo de tabaco no influyeron significativamente en el postoperatorio. Sólo hallamos una correlación estadísticamente significativa entre la higiene oral y el dolor a las 6 horas de la exodonci...

  13. Tuberculosis pulmonar de campos inferiores

    Alejandra González

    2010-10-01

    Full Text Available La tuberculosis (TB que compromete sólo los campos pulmonares inferiores (TBCI es poco frecuente en el adulto y en general está asociada a alguna causa de inmunodepresión. El objetivo de nuestro trabajo fue determinar la incidencia de TBCI en nuestra población y comparar sus características respecto de la TB pulmonar de localización habitual. Se estudiaron en forma retrospectiva en el período de 2004 a 2008, 42 pacientes con TBCI que fueron comparados con 84 pacientes con TB pulmonar de localización habitual (grupo control. Se excluyeron pacientes con HIV. La TBCI representó el 6% del total de TB pulmonar. No se encontraron diferencias significativas en cuanto a edad, sexo, presencia de cavidades en la radiografía, días de evolución y nivel de albúmina. La TBCI tuvo significativamente mayor proporción de comorbilidades (p < 0.001, presencia de condensación (p < 0.001 y compromiso unilateral (p < 0.001 en la radiografía de tórax, junto con mayor número de internaciones (p = 0.02. Cabe destacar que sólo16 de los 42 pacientes con TBCI (38% tenían alguna comorbilidad demostrada. La TBCI puede presentarse aun sin comorbilidades asociadas y debe sospecharse en neumonías de evolución tórpida independientemente de su localización.

  14. MB2 in maxillary second molar

    Prakash R

    2007-01-01

    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.

  15. Darkening of third molar roots on panoramic radiographs: is it really predominantly thinning of the lingual cortex?

    Szalma, J; Vajta, L; Lempel, E; Jeges, S; Olasz, L

    2013-04-01

    This study investigated the exact intra-alveolar aetiology of a panoramic high-risk sign, darkening of the third molar roots. 83 mandibular third molar surgical removals demonstrating dark bands on the third molar roots in preoperative radiographs were included in this prospective study. Exposure of the inferior alveolar nerve (IAN), the root morphology of the third molar (e.g. groove or hook) and the integrity of the mandibular canal or lingual cortical wall were observed. Differences between single (increased radiolucency alone) and multiple darkening cases (increased radiolucency with accompanying 'high risk' signs) and between IAN exposure and groove formation were analysed. In 38 cases (45.8%), the IAN was visible during the operation. Groove was present in 37.4% of cases. 26.5% of the cases showed lingual cortical thinning, while specious root conformation explained the formation of darkening on the radiographic images of an additional 9.6% of the cases. IAN exposure (Pthird molar roots is more often the result of fenestration of the inferior alveolar canal wall or groove formation of the root than lingual cortical thinning.

  16. Coronectomy of lower third molars with and without guided bony regeneration: a pilot study.

    Leung, Yiu Yan

    2016-02-01

    This pilot study for a split-mouth, randomised, clinical trial compared the incidence of postoperative complications, root migration, and adjacent second molar periodontal attachment after coronectomy of the lower third molars with or without guided bony regeneration. Six patients (three men and three women, mean (range) age 27 (21-44) years), each with bilateral lower third molars in close proximity to the inferior alveolar nerve, were recruited. One third molar of each patient was randomised to be treated by coronectomy with guided bony regeneration, and the other side coronectomy alone. All subjects were reviewed for 12 months. No neurosensory deficit was noted in either group. We found no significant differences between the two groups in postoperative morbidity. Mean (SD) root migration after coronectomy with guided bony regeneration at postoperative 2 weeks, 3 months, 6 months, and 12 months were 0.14 (0.34), 0.56 (0.68), 0.63 (0.83), and 0.63 (0.83) mm, respectively. These were significantly less than the results in the control group from postoperative 3 months onwards (3 months p=0.01, 6 months p=0.004, and 12 months p=0.003). There was a trend towards reduced periodontal depth at the adjacent second molar in the study group compared with that in the control group, but not significantly so. These results show that coronectomy of lower third molars with guided bony regeneration has low morbidity and seems to reduce root migration. A full-scale randomised clinical trial will show the effect on root migration and periodontal attachment of the adjacent second molar.

  17. Relación entre el apiñamiento y la erupción de los terceros molares

    Homs Asensio, D.; Sánchez Molins, Meritxell; Vázquez Salceda, María del Carmen; Ustrell i Torrent, Josep Maria, 1953-

    1998-01-01

    En el presente trabajo se ha realizado una revisión bibliográfica de la relación existente entre la erupción de los terceros molares y la posibilidad de que aparezca un apiñamiento anterior (normalmente inferior). El apiñamiento es una malposición dental muy frecuente en la población, por lo que si realmente se puede relacionar con la erupción del tercer molar, el tratamiento precoz en dichos casos evitaría la aparición de esta malposición dental. Conoceremos las posturas de los diferentes au...

  18. Does fixed retention prevent overeruption of unopposed mandibular second molars in maxillary first molar extraction cases?

    Christos Livas

    2016-01-01

    Full Text Available Abstract Background The objective of this study was to investigate whether multistranded fixed retainers prevented overeruption of unopposed mandibular second molars in maxillary first molar extraction cases. Methods The panoramic radiographs of 65 Class II Division 1 Caucasian Whites (28 females, 37 males consecutively treated with bilateral maxillary first molar extraction and the Begg technique, and with records taken after treatment (T1 and in retention (T2, were withdrawn from private practice records. After appliance removal, mandibular second molars were retained with sectional wires till at least T2 in case of lack of occlusal contact with the antagonist. The subjects were assigned to study-retention and control-nonretention groups based on the retention status of mandibular second molars. Radiographic analysis was carried out to determine inclination of mandibular molars and the resulting movement of second molar centroids. Parametric and nonparametric tests were performed to assess the changes between T1 and T2. Results No statistically significant differences in molar inclination were observed between groups and timepoints (P > 0.05. There were no statistically significant differences in molar movement percentages (P > 0.05 irrespective of whether fixed retention had been used or not. Conclusions No significant eruption occurred in unopposed mandibular second molars bonded with fixed sectional retainers compared to molars partially occluded with the antagonists without fixed retention. Given the study limitations, fixed retention should be considered with caution in restricting tooth overeruption in unopposed molars.

  19. Report of a Case: Blade-vent implant application taking into acount the lateral branch of the inferior alveoar nerve

    大滝, 祐吉; 植田, 章夫; 宮坂, 伸; 小松, 史; 岩井, 健治; 後藤, 一輔; 千野, 武廣

    1997-01-01

    Dental implants are now widely used for dental rehabilitation, but in some cases insufficient planning and complications result in poor prognoses. Paresthesia, which can be caused by nerve injury, is one of the postoperative complications. We report a case in which we applied a blade-vent implant into the mandibular molar region taking into account the lateral branch of the inferior alveolar nerve. The postoperative course was uneventful without paresthesia. In the preoperative examinations, ...

  20. Dentinal innervation of impacted human third molars.

    Lilja, J; Fagerberg-Mohlin, B

    1984-12-01

    Five totally impacted third molars were studied in the transmission electron microscope for the presence of nervous structures in the dentin before eruption. In contradiction to earlier studies available, nervous structures were found in the predentin and the dentin of the impacted third molars in different parts of the crown and also in the predentin of the root.

  1. Inferior alveolar nerve paresthesia caused by endodontic pathosis: a case report and review of the literature.

    Giuliani, M; Lajolo, C; Deli, G; Silveri, C

    2001-12-01

    Sensory disturbances such as anesthesia, hypoesthesia, hyperesthesia, and paresthesia may be present in the oral cavity, stemming from many local and systemic factors. Paresthesia of the inferior alveolar nerve is quite rare because of the unique anatomy of this nerve. Among other effects, periapical lesions can damage the nerve, resulting in paresthesia of its innervated area. Only a few cases of paresthesia caused by these lesions are reported in the literature. In this report we present a case of paresthesia of the right inferior alveolar nerve; discuss the anatomy, pathobiology, and etiology; and suggest that a periapical lesion affecting the lower right second molar (No. 31) may have been the cause. The routine x-rays (intraoral and panorex) and the axial and cross-sectional tomographs of the mandible by means of computed tomography contribute to making this case a good example of nerve injury.

  2. Infection-related mental and inferior alveolar nerve paresthesia: literature review and presentation of two cases.

    Morse, D R

    1997-07-01

    A review of the literature on infection-related mental and inferior alveolar nerve paresthesia is given. This is followed by 2 case reports. The first case is of a mandibular left second molar in which a chloropercha overfill puff occurred in the vicinity of the inferior alveolar canal. The tooth remained asymptomatic until 2 and 1/2 yr later, when the periapical lesion enlarged and swelling, pain, and paresthesia developed. The paresthesia resolved 2 weeks following periapical surgery. The second case is of a mandibular right first premolar in which paresthesia began 1 day after the initial endodontic treatment. The intracanal medication was formocresol on a cotton pellet that was squeezed dry. The paresthesia was treated by irrigation, antibiotics, and dexamethasone. The paresthesia lasted 7 weeks, and when it resolved the root canal was filled with gutta-percha/eucapercha. Almost 9 months later, the tooth remained asymptomatic.

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

    Hillerup, S

    2008-08-01

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

  4. Pulpectomy procedures in primary molar teeth

    Hany Mohamed Aly Ahmed

    2014-01-01

    Full Text Available Premature loss of primary molars can cause a number of undesirable consequences including loss of arch length, insufficient space for erupting premolars and mesial tipping of the permanent molars. Pulpectomy of primary molar teeth is considered as a reasonable treatment approach to ensure either normal shedding or a long-term survival in instances of retention. Despite being a more conservative treatment option than extraction, efficient pulpectomy of bizarre and tortuous root canals encased in roots programmed for physiologic resorption that show close proximity to developing permanent tooth buds presents a critical endodontic challenge. This article aims to provide an overview of this treatment approach, including partial and total pulpectomy, in primary molar teeth. In addition, the recommended guidelines that should be followed, and the current updates that have been developed, while commencing total pulpectomy in primary molars are discussed.

  5. General technique of third molar removal.

    Farish, Sam E; Bouloux, Gary F

    2007-02-01

    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.

  6. Defining the non-inferiority margin and analyzing non-inferiority: An overview.

    Althunian, Turki A; de Boer, Anthonius; Groenwold, Rolf H H; Klungel, Olaf H

    2017-03-02

    Non-inferiority trials are used to assess whether the effect of a new drug is not worse than an active comparator by more than a non-inferiority margin. If the difference between the new drug and the active comparator does not exceed this pre-specified margin, non-inferiority can be concluded. This margin must be specified based on clinical and statistical reasoning; however, it is considered as one the most challenging step in the design of non-inferiority trials. Regulators recommend that the margin should be defined based on the historical evidence of the active comparator (the latter is often the well-established standard treatment of the disease), which can be performed by different approaches. There are several factors and assumptions that need to be accounted for during the process of defining the margin and during the analysis of non-inferiority. Three methods are commonly used to analyze non-inferiority trials: the fixed-margin method, the point-estimate method, and the synthesis method. This article provides an overview of analyzing non-inferiority inferiority and choosing the non-inferiority margin.

  7. Treating Intraradicular Pockets of molars

    H. Lotfizade

    1987-10-01

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

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

    Gorur Ilker

    2006-02-01

    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.

  9. Clinical studies on inferior right hepatic veins

    Xue Xing; Hong Li; Wei-Guo Liu

    2007-01-01

    BACKGROUND:Many small veins are called accessory, short hepatic veins in addition to the right, middle and left hepatic veins. The size of these veins varied from a pinhole to 1 cm; the size of inferior right hepatic veins (IRHVs) is thicker than that of short hepatic veins or more than 1 cm occasionally. Adults have a higher incidence rate of the IRHV. DATA SOURCES:A literature search of the PubMed database was conducted and research articles were reviewed. RESULTS:The size of IRHVs is related to the size of the right hepatic vein, i.e. the larger the diameter of the right hepatic vein, the smaller the diameter of the IRHVs, and vice versa. The IRHVs are divided into superior, medial and inferior groups, separately named the superior, medial and inferior right hepatic veins according to the position of the IRHV entering the inferior vena cava. The superior right hepatic vein mainly drains the superior part of segmentⅦ, and the medial right hepatic vein drains the middle part of segmentⅦ. A thicker IRHV mainly drains segmentⅥ and the inferior part of segmentⅦ and a thinner IRHV drains the inferior part of segmentⅤ. CONCLUSIONS:The clinical signiifcance of these studies on IRHVs is varied: (1) Hepatic caudate lobe resection could be introduced after study on the veins of that lobe. (2) It is very important to identify the draining region of the IRHV for guiding hepatic segmentectomy. The postero-inferior area of the right lobe can be preserved along with the hypertrophic IRHV even if the entire main right hepatic vein is resected during segmentectomy ofⅦ andⅧwith right hepatic vein resection for patients with primary liver cancer. (3) The ligation of the major hepatic vein for the treatment of juxtahepatic vein injury is recommended because of severe hemorrhagic shock and dififculty in

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

    Bernardo Q Souki

    2015-01-01

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

  11. Functional organization of the left inferior precentral sulcus: dissociating the inferior frontal eye field and the inferior frontal junction.

    Derrfuss, J; Vogt, V L; Fiebach, C J; von Cramon, D Y; Tittgemeyer, M

    2012-02-15

    Two eye fields have been described in the human lateral frontal cortex: the frontal eye field (FEF) and the inferior frontal eye field (iFEF). The FEF has been extensively studied and has been found to lie at the ventral part of the superior precentral sulcus. Much less research, however, has focused on the iFEF. Recently, it was suggested that the iFEF is located at the dorsal part of the inferior precentral sulcus. A similar location was proposed for the inferior frontal junction area (IFJ), an area thought to be involved in cognitive control processes. The present study used fMRI to clarify the topographical and functional relationship of the iFEF and the IFJ in the left hemispheres of individual participants. The results show that both the iFEF and the IFJ are indeed located at the dorsal part of the inferior precentral sulcus. Nevertheless, the activations were spatially dissociable in every individual examined. The IFJ was located more towards the depth of the inferior precentral sulcus, close to the junction with the inferior frontal sulcus, whereas the iFEF assumed a more lateral, posterior and superior position. Furthermore, the results provided evidence for a functional double dissociation: the iFEF was activated only in a comparison of saccades vs. button presses, but not in a comparison of incongruent vs. congruent Stroop conditions, while the opposite pattern was found at the IFJ. These results provide evidence for a spatial and functional dissociation of two directly adjacent areas in the left posterior frontal lobe.

  12. Sextant of Sapphires for Molar Distalization

    Palla, Yudistar Venkata; Ganugapanta, Vivek Reddy

    2016-01-01

    Introduction Space analysis quantifies the amount of crowding within the arches estimating the severity of space discrepancy. The space gaining procedures include extraction and non-extraction procedures like expansion, proximal stripping and molar distalization. Aim To identify features seen in molar distalization cases. Materials and Methods The sample size comprised 20 patients in whom molar distalization was decided as the treatment plan. The study models and lateral cephalograms of all the patients were taken. Occlusograms were obtained. Model analysis and cephalometric analysis were performed. Descriptive statistical analysis like mean, standard deviation, standard error and mode were done. Results The parameters in Question gave following results. The Bolton analysis showed anterior mandibular excess with mean value of 1.56mm±1.07. The first order discrepancy between maxillary central and lateral incisors was 5±1.95. The premolar rotation showed mean value of 16.58±5.12. The molar rotation showed the value of 7.66±2.26. The nasolabial angle showed the mean of 101.25±8.7 IMPA of 101.4±5.74. Conclusion The six features studied in molar distalization cases [First order discrepancy between upper central and lateral incisors; Rotation of premolars and molars; Bolton’s discrepancy in anterior dentition; Average to horizontal growth pattern; Proclined lower incisors and Obtuse nasolabial angle] can be taken as patterns seen in molar distalization cases and considered as a valid treatment plan. PMID:27656572

  13. Role of third molars in orthodontics

    Almpani, Konstantinia; Kolokitha, Olga-Elpis

    2015-01-01

    The role of third molars in the oral cavity has been extensively studied over the years. Literature includes numerous diagnostic and treatment alternatives regarding the third molars. However, an issue that has not been discussed at the same level is their involvement in orthodontic therapy. The aim of this study is to present a review of the contemporary literature regarding the most broadly discussed aspects of the multifactorial role of third molars in orthodontics and which are of general dental interest too. PMID:25685759

  14. Unilateral Molar Distalization: A Nonextraction Therapy

    M. Bhanu Prasad

    2012-01-01

    Full Text Available 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.

  15. Treatment of ectopic first permanent molar teeth.

    Hennessy, Joe

    2012-11-01

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

  16. Skeletal stability after inferior maxillary repositioning without interpositional graft.

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

    2012-04-01

    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.

  17. Lateralization Technique and Inferior Alveolar Nerve Transposition

    Angélica Castro Pimentel

    2016-01-01

    Full Text Available Bone resorption of the posterior mandible can result in diminished bone edge and, therefore, the installation of implants in these regions becomes a challenge, especially in the presence of the mandibular canal and its contents, the inferior alveolar nerve. Several treatment alternatives are suggested: the use of short implants, guided bone regeneration, appositional bone grafting, distraction osteogenesis, inclined implants tangential to the mandibular canal, and the lateralization of the inferior alveolar nerve. The aim was to elucidate the success rate of implants in the lateralization technique and in inferior alveolar nerve transposition and to determine the most effective sensory test. We conclude that the success rate is linked to the possibility of installing implants with long bicortical anchor which favors primary stability and biomechanics.

  18. Lateralization Technique and Inferior Alveolar Nerve Transposition

    Sanches, Marco Antonio; Ramalho, Gabriel Cardoso; Manzi, Marcello Roberto

    2016-01-01

    Bone resorption of the posterior mandible can result in diminished bone edge and, therefore, the installation of implants in these regions becomes a challenge, especially in the presence of the mandibular canal and its contents, the inferior alveolar nerve. Several treatment alternatives are suggested: the use of short implants, guided bone regeneration, appositional bone grafting, distraction osteogenesis, inclined implants tangential to the mandibular canal, and the lateralization of the inferior alveolar nerve. The aim was to elucidate the success rate of implants in the lateralization technique and in inferior alveolar nerve transposition and to determine the most effective sensory test. We conclude that the success rate is linked to the possibility of installing implants with long bicortical anchor which favors primary stability and biomechanics. PMID:27433360

  19. Portal Decompression Using the Inferior Mesenteric Vein

    Paolo Gorini

    1998-01-01

    Full Text Available We report five patients with variceal hemorrhage, in three cases secondary to diffuse thrombosis of the portal, superior mesenteric and splenic veins. Mesenteric angiography demonstrated patency of the inferior mesenteric vein (IMV in each, and successful portal decompression by anastomosis of the IMV to the left renal vein (n=4 or the inferior vena cava (n=1 was accomplished. Bleeding was permanently controlled: four patients have survived from one to eight years post-operatively. Because shunt procedures utilizing the IMV are technically straightforward, subtotally decompress the portal system and avoid the right upper quadrant, they may be advantageous in certain clinical settings.

  20. Delayed removal of a maxillary third molar from the infratemporal fossa.

    Gómez-Oliveira, Guillermo; Arribas-García, Ignacio; Alvarez-Flores, Modesto; Gregoire-Ferriol, Johanna; Martínez-Gimeno, Carlos

    2010-05-01

    Removal of an impacted superior third molar is usually a simple and uncomplicated procedure for an Oral and Maxillofacial Surgeon. Nevertheless, complications are possible and include infection, facial swallowing, trismus, wound dehiscence, root fracture or even orosinusal fistula. Iatrogenic displacement into the infratemporal fossa is frequently mentioned but rarely reported. This anatomical fossa includes several important structures such as the internal maxillary artery, the venous pterygoid plexus, the sphenopalatine nerve, the coronoid process of the mandible and the pterygoid muscles. Recommended treatment includes immediate surgical removal if possible or initial observation and secondary removal, as necessary, because of infection, limited mandibular movement, inability to extract the tooth, or the patient's psychological unease. Sometimes, the displaced tooth may spontaneously migrate inferiorly and becomes accessible intraorally. This report describes the location and secondary surgical removal of a left maxillary third molar displaced into the infratemporal fossa, two weeks after first attempt at extraction.

  1. Functional organization of the left inferior precentral sulcus: dissociating the inferior frontal eye field and the inferior frontal junction

    Derrfuss, J.; Vogt, V.L.; Fiebach, C.J.; Cramon, D.Y. von; Tittgemeyer, M.

    2012-01-01

    Two eye fields have been described in the human lateral frontal cortex: the frontal eye field (FEF) and the inferior frontal eye field (iFEF). The FEF has been extensively studied and has been found to lie at the ventral part of the superior precentral sulcus. Much less research, however, has focuse

  2. A Molar Pregnancy within the Fallopian Tube

    Laura Allen

    2016-01-01

    Full Text Available Background. Discussion of the incidence of molar pregnancy and ectopic pregnancy. Role of salpingostomy and special considerations for postoperative care. Case. The patient is a 29-year-old G7P4 who presented with vaginal bleeding in the first trimester and was initially thought to have a spontaneous abortion. Ultrasound was performed due to ongoing symptoms and an adnexal mass was noted. She underwent uncomplicated salpingostomy and was later found to have a partial molar ectopic pregnancy. Conclusion. This case illustrates the rare occurrence of a molar ectopic pregnancy. There was no indication of molar pregnancy preoperatively and this case highlights the importance of submitting and reviewing pathological specimens.

  3. Dental Interventions on First Permanent Molars

    2016-01-01

    The first permanent molars have the biggest dental morbidity and mortality of all permanent teeth. The main aim was to evaluate of the most common dental problems and procedures that are performed on the first permanent molars. Material and method: examination was performed in three private dental offices, two from urban and one from rural region, over a period of 2 years. The data was obtained by using dental charts from the patients and by the ambulatory register for performe...

  4. Single-rooted primary first mandibular molar

    Haridoss, SelvaKumar; Swaminathan, Kavitha; Rajendran, Vijayakumar; Rajendran, Bharathan

    2014-01-01

    Morphological variations like single-rooted molar in primary dentition are scarce. Understanding the root canal anatomy and variations is necessary for successful root canal therapy. The purpose of the present article is to report successful endodontic treatment of primary left mandibular first molar with an abnormal morphology of a single root. This case report highlights the importance of knowledge and its applications in the management of anomalous anatomic variants which play a crucial ro...

  5. The life quality after third molar surgery

    Dimova, Cena

    2010-01-01

    Aim: The aims of this retrospective study were: first of all, to evaluate the patients’ perception of changes in oral health–related quality of life over a 2-month period after third molar surgery. Second aim was to compare the clinical outcome of performed oral surgery with evaluation the influence of factors affecting outcome. Material and Methods. A total of 30 consecutive healthy patients who presented with unilaterally or bilaterally impacted mandible third molar were included in this...

  6. Clinical management of the mandibular molars.

    Canut, J A

    1975-09-01

    The complex variety of clinical problems posed by the lower molars requires maximum care in diagnosis and in treatment planning. In this article several therapeutic solutions to these problems are presented. The need to treat positional anomalies of the second molars and to control their drifting in cases of bracing and mandibular insertion, may be an effective auxillary means of treatment of those malocclusions in which lengthening of the dental bracing zones is indicated.

  7. Molar Incisor Hypomineralization, Prevalence, and Etiology

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

    2014-01-01

    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 wer...

  8. Influence of deciduous molar hypomineralization on the development of molar-incisor hypomineralizarion

    Costa-Silva C.M.; Paula J.S.; Ambrosano G.M.B.; Mialhe F.L.

    2013-01-01

    Defects similar to Molar-Incisor Hypomineralization (MIH) in second primary molars can be found in the literature, being recently named Deciduous Molar Hypomineralization (DMH). Researchers have stated that the presence of DMH in primary dentition represents a risk for MIH in permanent teeth. The explanation for this association is probably related to the etiological factors. Aim: To investigate prospectively the association between DMH and MIH and the etiologic factors involved in both defec...

  9. COMPARISON OF PARTIAL INFERIOR TURBINECTOMY AND SUBMUCOSAL DIATHERMY FOR HYPERTROPHIED INFERIOR TURBINATE IN ALLERGIC RHINITIS PATIENTS

    Smitha Chandra

    2015-07-01

    Full Text Available BACKGROUND : The inferior turbinate is the first point of contact of allergen in the nose. In patients with allergic rhinitis the turbinate hypertrophies and its mucosa becomes purplish edematous. This leads to significant obstruction of airway. Hence reduction of this hypertrophied inferior turbinate is essential. AIM: To analyze & evaluate the efficacy of sub mucosal diathermy and partial inferior turbinectomy in the treatment of symptomatic hypertrophied inferior turbinates in allergic rhinitis patients in a rural setup. METHODS AND MATERIAL S: A prospective clinical study of 132 patients between age group of 15 - 55 years of eith er sex were enrolled in the study with bilateral Inferior. Turbinate Hypertrophy who had history of failed medical line of treatment. After informing , the patients were randomized into two groups to eliminate bias byallotting them alternately into the groups. Patients in Group I underwent. Submucosal diathermy and Group II patients underwent Partial Inferior. Turbinectomy. Postoperative follow up was done at regular intervals by objective& subjective assessment. STATISTICAL ANALYSIS USED: Friedman test and Ch i Square test were used for statistical analysis. RESULTS: In group I significant improvement of nasal airflow was seen in 14% patients & 85.9% had moderate improvement. In group II 41.3% of patients had significant improvement & 58.6% had moderate i mprovement. Statistically by analyzing the ranks of subjective nasal obstruction and objective nasal obstruction of Group - I & Group - IIwe conclude that Group - II subjects showed more improvement than Group I. CONCLUSIONS: Various surgical methods have been t ried for enlarged inferior turbinate secondary to allergic rhinitis. Of them the well - known techniques are s ubmucosal Diathermy & Partial Inferior Turbinectomy. In this study Partial Inferior Turbinectomy was found to be more effective in relieving nasal ob structionin allergic rhinitis patients for

  10. A case of inferior lumbar hernia

    Vidhyasagar M. Sharma

    2013-02-01

    Full Text Available 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

  11. Iatrogenic injury to the inferior alveolar nerve

    Hillerup, Søren

    2008-01-01

    The purpose of this prospective, non-randomised, descriptive study is to characterise the neurosensory deficit and associated neurogenic discomfort in 52 patients with iatrogenic injury to the inferior alveolar nerve (IAN). All patients were examined and followed up according to a protocol assess...

  12. Influence of treatment including second molars on final and postretention molar angulation

    Luiz Filiphe Gonçalves Canuto

    2013-10-01

    Full Text Available OBJECTIVE: Evaluate axial mesiodistal inclinations of the mandibular molars in orthodontically treated cases, analyzing whether inclusion of second mandibular molars in treatment mechanics has any influence on final and postretention molars angulations. METHODS: The sample comprised 150 panoramic radiographs of 50 patients. Patients were treated with extraction of four first premolars and divided into 2 groups: Group 1 comprised 25 subjects without inclusion of mandibular second molars during orthodontic treatment, whereas Group 2 comprised 25 subjects with inclusion of mandibular second molars. Panoramic radiographs at three observation times were evaluated: pretreatment, posttreatment and postretention. The statistical analysis included one-way analysis of variance (ANOVA for intragroup evaluation and independent t-tests for intergroup comparisons. RESULTS: Intragroup analysis demonstrated significant uprighting of mandibular first and second molars during treatment in Group 2, which remained stable during the postretention stage. Intergroup comparison demonstrated that Group 2 presented first and second molars significantly more uprighted in relation to Group 1 in both post-treatment and postretention stages. CONCLUSIONS: It was concluded that inclusion of mandibular second molars in the orthodontic mechanics is relevant not only to correct the angulation of these teeth, but also to aid mandibular first molars uprighting.

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

    Suprabha B

    2006-05-01

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

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

    Alessandro Leite Cavalcanti

    2008-07-01

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

  15. Does fixed retention prevent overeruption of unopposed mandibular second molars in maxillary first molar extraction cases?

    Livas, Christos; Halazonetis, Demetrios J; Booij, Johan W; Katsaros, Christos; Ren, Yijin

    2016-01-01

    BACKGROUND: The objective of this study was to investigate whether multistranded fixed retainers prevented overeruption of unopposed mandibular second molars in maxillary first molar extraction cases. METHODS: The panoramic radiographs of 65 Class II Division 1 Caucasian Whites (28 females, 37 males

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

    Poozesh, Saeed

    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

  17. The bihemispheric posterior inferior cerebellar artery

    Cullen, Sean P. [Brigham and Women' s Hospital and Children' s Hospital, Department of Radiology and Neurosurgery, Boston, MA (United States); Ozanne, Augustin; Alvarez, Hortensia; Lasjaunias, Pierre [Service de Neuroradiologie Diagnostic et Therapeutique, Hopital de Bicetre-Universite Paris-sud Orsay (France)

    2005-11-01

    Rarely, a solitary posterior inferior cerebellar artery (PICA) will supply both cerebellar hemispheres. We report four cases of this variant. We present a retrospective review of clinical information and imaging of patients undergoing angiography at our institution to identify patients with a bihemispheric PICA. There were four patients: three males and one female. One patient presented with a ruptured arteriovenous malformation, and one with a ruptured aneurysm. Two patients had normal angiograms. The bihemispheric PICA was an incidental finding in all cases. The bihemispheric vessel arose from the dominant left vertebral artery, and the contralateral posterior inferior cerebellar artery was absent or hypoplastic. In all cases, contralateral cerebellar supply arose from a continuation of the ipsilateral PICA distal to the choroidal point and which crossed the midline dorsal to the vermis. We conclude that the PICA may supply both cerebellar hemispheres. This rare anatomic variant should be considered when evaluating patients with posterior fossa neurovascular disease. (orig.)

  18. 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

    Dennis Flanagan DDS

    2012-03-01

    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.

  19. Diagnosis and treatment of molar incisor hypomineralization.

    Mathu-Muju, Kavita; Wright, J Timothy

    2006-11-01

    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.

  20. Does Wal-Mart Sell Inferior Goods?

    Emek Basker

    2008-01-01

    I estimate the aggregate income elasticity of Wal-Mart's and Target's revenues using quarterly data for 1997-2006. I find that Wal-Mart's revenues increase during bad times, whereas Target's revenues decrease, consistent with Wal-Mart selling "inferior goods" in the technical sense of the term. An upper bound on the aggregate income elasticity of demand for Wal-Mart's wares is -0.5.

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

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

    2015-06-01

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

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

    Sznajder, Alexandre Joseph

    2001-07-01

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

  3. Accidental injury of the inferior alveolar nerve due to the extrusion of calcium hydroxide in endodontic treatment: a case report.

    Shin, Yooseok; Roh, Byoung-Duck; Kim, Yemi; Kim, Taehyeon; Kim, Hyungjun

    2016-02-01

    During clinical endodontic treatment, we often find radiopaque filling material beyond the root apex. Accidental extrusion of calcium hydroxide could cause the injury of inferior alveolar nerve, such as paresthesia or continuous inflammatory response. This case report presents the extrusion of calcium hydroxide and treatment procedures including surgical intervention. A 48 yr old female patient experienced Calcipex II extrusion in to the inferior alveolar canal on left mandibular area during endodontic treatment. After completion of endodontic treatment on left mandibular first molar, surgical intervention was planned under general anesthesia. After cortical bone osteotomy and debridement, neuroma resection and neurorrhaphy was performed, and prognosis was observed. But no improvement in sensory nerve was seen following surgical intervention after 20 mon. A clinician should be aware of extrusion of intracanal medicaments and the possibility of damage on inferior alveolar canal. Injectable type of calcium hydroxide should be applied with care for preventing nerve injury. The alternative delivery method such as lentulo spiral was suggested on the posterior mandibular molar.

  4. Inferior venacaval compression due to excessive abdominal packing

    M.C.B. Santhosh

    2014-06-01

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

  5. Maxillary antral lavage using inferior meatal cannula anaesthesia.

    Mochloulis, G; Hern, J D; Hollis, L J; Tolley, N S

    1996-08-01

    Antral puncture and lavage through the inferior meatus is a minor but common otolaryngological procedure, usually performed under local anaesthesia. We describe a new method of introducing local anaesthetic into the inferior meatus, via the use of a soft intravenous cannula connected to a syringe containing 10 per cent cocaine paste. We have called this new technique inferior meatal cannula anaesthesia (IMCA).

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

    C. Recio Lora

    2009-08-01

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

  7. Distalización de molares

    Ana María García Jiménez

    2016-01-01

    Full Text Available La distoclusión es una anomalía que alcanza a más de la mitad de los pacientes ortodóncicos, entre sus causas se encuentra la mesogresión de molares superiores. Una opción terapéutica es la distalización molar, cuando se considera la corrección sin extracciones. Se presenta el caso de un paciente remitido desde la atención primaria de salud, con relación molar de distoclusión derecha, neutroclusion izquierda, resalte de seis milímetros y sobrepase corona completa. Previa confección de modelos de estudio e indicación de estudio radiográfico, se procedió a la corrección ortodóncica con la placa Cetlin, a la que se le realizaron algunas modificaciones. Se corrigió la distoclusión del primer molar permanente superior derecho hasta la neutroclusión; además del espacio requerido para el acomodamiento del canino superior derecho, se logró la corrección del sobrepase hasta un tercio de corona y se mejoró el resalte de seis a cuatro milímetros.

  8. Molar extinction coefficients of some fatty acids

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

    2002-01-01

    ) 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...

  9. Pre-operative assessment of relationship between inferior dental nerve canal and mandibular impacted third molar in Saudi population

    S. Shujaat

    2014-07-01

    Conclusions: Our sample population most commonly exhibited horizontally angulated class I position B impactions of the mandible. The position of the ID canal significantly influenced the type of impaction and bone contact.

  10. Avaliação da presença do canal cavo inter-radicular em molares pelo método da microscopia eletrônica de varredura

    Lorenzzo De Angeli CESCONETTO

    Full Text Available Resumo Introdução A cavidade pulpar ainda é um mistério a ser desvendado, pois podem existir inúmeras ramificações que precisam ser esclarecidas para que o clínico possa interpretar e desenvolver o seu papel adequadamente. Uma das variações anatômicas que apresentam grande controvérsia na literatura é o reconhecimento da presença do canal cavo inter-radicular. Este canal tem origem no assoalho da câmara pulpar, percorre a dentina inter-radicular e alcança o ligamento periodontal na região de furca, constituindo uma das vias de comunicação entre o ligamento periodontal e o tecido pulpar, podendo servir como meio de contaminação. Objetivo Estudar a frequência do canal cavo inter-radicular em molares. Material e método Análise de cinco primeiros molares superiores, dez segundos molares superiores, dez primeiros molares inferiores e dez segundos molares inferiores, utilizando-se a microscopia eletrônica de varredura. Resultado Foi observada a presença de forames em 30% dos assoalhos e 50% das furcas dos primeiros molares inferiores, e 40% e 60% no assoalho e na furca dos segundos molares inferiores, respectivamente. O diâmetro desses forames variou de 32 µm até 312 µm. Conclusão A prevalência deste canal é muito variada ao se analisarem as diferentes metodologias.

  11. Decompression of inferior alveolar nerve: case report.

    Marques, Tiago Miguel Santos; Gomes, Joana Marques

    2011-01-01

    Paresthesia as a result of mechanical trauma is one of the most frequent sensory disturbances of the inferior alveolar nerve. This case report describes surgical treatment for paresthesia caused by a compressive phenomenon within the mandibular canal. The cause of the compression, a broken instrument left in the patient's mouth during previous endodontic therapy, was identified during routine radiography and computed tomography. Once the foreign object was removed by surgery, the paresthesia resolved quickly. This case highlights the potential for an iatrogenic mechanical cause of paresthesia.

  12. Incidence of distal caries in mandibular second molars due to impacted third molars: Nonintervention strategy of asymptomatic third molars causes harm? A retrospective study

    Srivastava, Nikhil; Shetty, Akshay; Goswami, Rahul Dev; Apparaju, Vijay; Bagga, Vivek; Kale, Saurabh

    2017-01-01

    Background: Removal of impacted third molars is the most common oral surgical procedure. Many investigators have questioned the necessity of removal in patients who are free of symptoms or associated pathologies. Aim: The aim of this retrospective study was to evaluate the incidence of caries on distal aspect of mandibular second molars in patients referred for corresponding third molar assessment and to identify its association with angular position and depth of the impacted mandibular third molars based on the classification of Pell and Gregory. Methodology: Records of 150 patients with impacted third molar presenting to the Department of Oral and Maxillofacial Surgery, Sri Rajiv Gandhi College of Dental Sciences and Hospital, were assessed retrospectively. The radiographic angulation and depth of mandibular third molar impaction were determined and compared to determine the relationship with incidence of caries on the distal surface of the second molar. Results: According to this study results, 37.5% cases show caries on the distal aspect of mandibular second molars. The incidence of caries with mesioangular impacted third molars was 55%. A majority of these mesioangular cases were Level B and Class I as per the Pell and Gregory classification. Conclusion: The prophylactic extraction of mandibular third molars is indicated if the angulation is between 30° and 70° and is justified by incidence of distal caries in the second molars. PMID:28251102

  13. Human dental age estimation combining third molar(s) development and tooth morphological age predictors.

    Thevissen, P W; Galiti, D; Willems, G

    2012-11-01

    In the subadult age group, third molar development, as well as age-related morphological tooth information can be observed on panoramic radiographs. The aim of present study was to combine, in subadults, panoramic radiographic data based on developmental stages of third molar(s) and morphological measurements from permanent teeth, in order to evaluate its added age-predicting performances. In the age range between 15 and 23 years, 25 gender-specific radiographs were collected within each age category of 1 year. Third molar development was classified and registered according the 10-point staging and scoring technique proposed by Gleiser and Hunt (1955), modified by Köhler (1994). The Kvaal (1995) measuring technique was applied on the indicated teeth from the individuals' left side. Linear regression models with age as response and third molar-scored stages as explanatory variables were developed, and morphological measurements from permanent teeth were added. From the models, determination coefficients (R (2)) and root-mean-square errors (RMSE) were calculated. Maximal-added age information was reported as a 6 % R² increase and a 0.10-year decrease of RMSE. Forensic dental age estimations on panoramic radiographic data in the subadult group (15-23 year) should only be based on third molar development.

  14. An innovative technique to distalize maxillary molar using microimplant supported rapid molar distalizer

    Meenu Goel

    2013-01-01

    Full Text Available Introduction: In recent years, enhancements in implants have made their use possible as a mode of absolute anchorage in orthodontic patients. In this paper, the authors have introduced an innovative technique to unilaterally distalize the upper left 1 st molar to obtain an ideal Class I molar relationship from a Class II existing molar relationship with an indigenous designed distalizer. Clinical Innovation: For effective unilateral diatalization of molar, a novel cantilever sliding jig assembly was utilized with coil spring supported by a buccally placed single micro implant. The results showed 3 mm of bodily distalization with 1 mm of intrusion and 2° of distal tipping of upper left 1 st molar in 1.5 months. Discussion: This appliance is relatively easy to insert, well-tolerated, and requires minimal patient cooperation compared to other present techniques of molar distalization. Moreover, it is particularly useful in cases that are Class II on one side and Class I on the other, with a minor midline discrepancy and nominal overjet. Patient acceptance level was reported to be within patients physiological and comfort limits.

  15. Intra-sinusal third molar: Case report

    Frederico Sampaio Neves

    2011-01-01

    Full Text Available Ectopic tooth eruption into an area other than the oral cavity is rare. Nasal septum, mandibular condyle, coronoid process and infratemporal fossa space have been reported as frequent locations for ectopic tooth eruption. Ectopic teeth located within the maxillary sinus may be asymptomatic, found only in routine examinations. Headache, sinusitis and nasal obstruction are some of the associated symptoms. The differential diagnosis includes foreign bodies (rhinolith, infections (syphilis and tuberculosis, benign lesions (hemangioma, osteoma, calcifi ed polyp and malign lesions (osteosarcoma. Upper third molars located within the maxillary sinus may be associated with the development of mucocele or dentigerous cyst. The aim of this paper was to describe the case of a 24-year old female patient with an ectopic right upper third molar in the maxillary sinus. A hyperdense area was observed with sinus obliteration, consistent with mucous material.

  16. Inferior alveolar nerve paresthesia after overfilling of endodontic sealer into the mandibular canal.

    González-Martín, Maribel; Torres-Lagares, Daniel; Gutiérrez-Pérez, José Luis; Segura-Egea, Juan José

    2010-08-01

    The present study describes a case of endodontic sealer (AH Plus) penetration within and along the mandibular canal from the periapical zone of a lower second molar after endodontic treatment. The clinical manifestations comprised anesthesia of the left side of the lower lip, paresthesia and anesthesia of the gums in the third quadrant, and paresthesia and anesthesia of the left mental nerve, appearing immediately after endodontic treatment. The paresthesia and anesthesia of the lip and gums were seen to decrease, but the mental nerve paresthesia and anesthesia persisted after 3.5 years. This case illustrates the need to expend great care with all endodontic techniques when performing nonsurgical root canal therapy, especially when the root apices are in close proximity to vital anatomic structures such as the inferior alveolar canal.

  17. Ectopic third molar in the maxillary sinus

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

    2011-01-01

    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.

  18. Dens in dente of maxillary third molar

    Subramaniam Arun

    2008-01-01

    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.

  19. Positional changes of the third molar in orthodontically treated patients

    2013-01-01

    Objective and Rationale. Over the years, the effects of the third molars eruption on the dental arches have been studied extensively. Still, literature provides less data regarding the effects of the orthodontic treatment on the third molars position. The aim of our study was to assess the positional changes of the third molars relative to the occlusal plane and to the second molar long axis, changes occurred during orthodontic treatment performed with or without premolar extractions. Method....

  20. [The role of panoramic radiography in assessing the risk of injury to the inferior alveolar nerve before the extraction of mandibular wisdom teeth. The effect of the extent of root curvature and inferior alveolar canal-root tip overlap on the risk assessment].

    Szalma, József; Lempel, Edina; Csuta, Tamás; Bártfai, Dóra; Jeges, Sára; Olasz, Lajos

    2010-06-01

    The aim of the present study was to determine on panoramic radiographic images the effect of the distance between the root curvatures and inferior alveolar canal (IAC) root tip overlap on the surgeon's risk assessment predicting inferior alveolar nerve (IAN) paresthesia after lower third molar removal. In this case-control study 41 cases with postoperative IAN paresthesia and 359 controls without any postoperative complications were involved. Demographic data, root curvatures and the extent of IAC-root tip overlap were registered. The cases of major curvature--larger than 90 degrees (P=0.015; odds ratio [OR]=2.65), the "deepest" superimposition (Pparesthesia. Assessing root curvatures and the extent of IAC-root tip overlap for predicting IAN paresthesia after mandibular third molar removal should help to improve risk assessment.

  1. 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

    R Fuentes

    2012-08-01

    Full Text Available La variada posición anatómica de los terceros molares mandibulares presenta importantes desafíos asociados a su profundidad y grado de inclinación. Las complicaciones más habituales del procedimiento quirúrgico convencional de extracción se relacionan con la extensa osteotomía y poca visualización 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

  2. Inferior alveolar nerve injuries associated with mandibular fractures.

    Bede, Salwan Yousif Hanna; Ismael, Waleed Khaleel; Al-Assaf, Dhuha A; Omer, Saad Salem

    2012-11-01

    The study evaluates the incidence of inferior alveolar nerve injuries in mandibular fractures, the duration of their recovery, and the factors associated with them. Fifty-two patients with mandibular fractures involving the ramus, angle, and body regions were included in this study; the inferior alveolar nerve was examined for neurological deficit posttraumatically using sharp/blunt differentiation method, and during the follow-up period the progression of neural recovery was assessed. The incidence of neural injury of the inferior alveolar nerve was 42.3%, comminuted and displaced linear fractures were associated with higher incidence of inferior alveolar nerve injury and prolonged recovery time, and recovery of inferior alveolar nerve function occurred in 91%.Fractures of the mandible involving the ramus, angle, and body regions, and comminuted and displaced linear fractures are factors that increase the incidence of inferior alveolar nerve injuries. Missile injuries can be considered as another risk factor.

  3. Total laparoscopic retrieval of inferior vena cava filter

    Ehsan Benrashid

    2015-08-01

    Full Text Available While there is some local variability in the use of inferior vena cava filters and there has been some evolution in the indications for filter placement over time, inferior vena cava filters remain a standard option for pulmonary embolism prophylaxis. Indications are clear in certain subpopulations of patients, particularly those with deep venous thrombosis and absolute contraindications to anticoagulation. There are, however, a variety of reported inferior vena cava filter complications in the short and long term, making retrieval of the filter desirable in most cases. Here, we present the case of a morbidly obese patient complaining of chronic abdominal pain after inferior vena cava filter placement and malposition of the filter with extensive protrusion outside the inferior vena cava. She underwent successful laparoscopic retrieval of her malpositioned inferior vena cava filters after failure of a conventional endovascular approach.

  4. Incidence of neurosensory deficits and recovery after lower third molar surgery: a prospective clinical study of 4338 cases.

    Cheung, L K; Leung, Y Y; Chow, L K; Wong, M C M; Chan, E K K; Fok, Y H

    2010-04-01

    A prospective study of all lower third molar surgery performed in the outpatient extraction clinic of a teaching dental hospital was conducted from January 1998 through October 2005 to determine the incidence of subsequent neurosensory deficit due to inferior alveolar nerve (IAN) and lingual nerve (LN) injury, to examine possible contributing risk factors and to describe the pattern of recovery. 3595 patients were included (61% female, 39% male; age range, 14-82 years). Of the 4338 lower third molar extractions performed by various grades of operators, 0.35% developed IAN deficit and 0.69% developed LN deficit. Distoangular impaction was found to increase the risk of LN deficit significantly (pdeficit (pdeficits (pdeficits was noted most significantly at 3 and 6 months, respectively. By the end of the follow-up period, 67% of IAN deficits and 72% of LN deficits had recovered completely.

  5. Influence of unilateral maxillary first molar extraction treatment on second and third molar inclination in Class II subdivision patients

    Livas, Christos; Pandis, Nikolaos; Booij, Johan Willem; Halazonetis, Demetrios J.; Katsaros, Christos; Ren, Yijin

    2016-01-01

    Objective: To assess the maxillary second molar (M2) and third molar (M3) inclination following orthodontic treatment of Class II subdivision malocclusion with unilateral maxillary first molar (M1) extraction. Materials and Methods: Panoramic radiographs of 21 Class II subdivision adolescents (eight

  6. PENARIKAN GIGI MOLAR IMPAKSI PADA RAHANG BAWAH (Laporan Kasus

    Debora Hidayat

    2015-08-01

    Full Text Available Impacted mandibular molars often caused by locking of the adjacent teeth, lack of space and many other reasons. Surgical extraction used to be the first choice in treating the severely impacted molars. In this article, firstly a horizontally impacted mandibular first molar and a mandibular second molar were diagnosed radiographically. By surgical crown exposure, combined with elastic traction, the teeth can be pulled occlusally into proper position. However, a thorough observation to control the position of the impacted molars during traction is still necessary.

  7. Complications of third molar surgery and their management.

    Marciani, Robert D

    2012-09-01

    The frequency and severity of untoward events associated with surgical procedures are influenced by multiple factors that may be related to the procedure, patient, and/or surgeon. Not every third molar needs to be removed. Full bony impacted lower third molars well below the cervical margin of the second molar crowns should be considered for retention. Certain deviations from normal healing should be considered to be complications. Risk factors associated with third molar removal should be carefully established and explained to the patient. Third molar surgery has a predictable postsoperative course for the average patient.

  8. Radiologic study of mandibular third molar of Korean youths

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

    1982-11-15

    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%.

  9. Partial breast reconstruction with mini superficial inferior epigastric artery and mini deep inferior epigastric perforator flaps.

    Spiegel, Aldona J; Eldor, Liron

    2010-08-01

    In this study, partial breast reconstruction was undertaken after breast conservation therapy using mini abdominal free flaps on both an immediate and delayed basis.Patient demographics, oncologic status, reconstructive data, and complications were collected from medical records.Twelve patients (age range 39-60) were included in this study with a mean follow-up time of 5 years. Ten mini superficial inferior epigastric artery flaps and 2 mini deep inferior epigastric perforator flaps were used (7 immediate and 5 delayed reconstructions). No flap lost, 1 minor abdominal wound dehiscence, and no local or distant recurrences were noted. Good to excellent results were reported by 91% of the women.In properly selected patients with high motivation toward breast conservation, tailored abdominal mini-free flaps can safely and satisfactorily be implemented for the reconstruction of partial mastectomy defects. Patients should be comprehensively educated on the potential future implications of using the abdominal donor site for partial breast reconstruction.

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

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

    2010-01-01

    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.

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

    Shinohara Elio

    2010-01-01

    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.

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

    Vanishree S Nayak; Ramachandra Bhat K; Prakash Billakanti Babu

    2011-01-01

    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...

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

    Rubens Rodrigues Tavares

    2015-04-01

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

  14. Third molar development: measurements versus scores as age predictor.

    Thevissen, P W; Fieuws, S; Willems, G

    2011-10-01

    Human third molar development is widely used to predict chronological age of sub adult individuals with unknown or doubted age. For these predictions, classically, the radiologically observed third molar growth and maturation is registered using a staging and related scoring technique. Measures of lengths and widths of the developing wisdom tooth and its adjacent second molar can be considered as an alternative registration. The aim of this study was to verify relations between mandibular third molar developmental stages or measurements of mandibular second molar and third molars and age. Age related performance of stages and measurements were compared to assess if measurements added information to age predictions from third molar formation stage. The sample was 340 orthopantomograms (170 females, 170 males) of individuals homogenously distributed in age between 7 and 24 years. Mandibular lower right, third and second molars, were staged following Gleiser and Hunt, length and width measurements were registered, and various ratios of these measurements were calculated. Univariable regression models with age as response and third molar stage, measurements and ratios of second and third molars as predictors, were considered. Multivariable regression models assessed if measurements or ratios added information to age prediction from third molar stage. Coefficients of determination (R(2)) and root mean squared errors (RMSE) obtained from all regression models were compared. The univariable regression model using stages as predictor yielded most accurate age predictions (males: R(2) 0.85, RMSE between 0.85 and 1.22 year; females: R(2) 0.77, RMSE between 1.19 and 2.11 year) compared to all models including measurements and ratios. The multivariable regression models indicated that measurements and ratios added no clinical relevant information to the age prediction from third molar stage. Ratios and measurements of second and third molars are less accurate age predictors

  15. Molar Pregnancy Presents as Tubal Ectopic Pregnancy

    Fatemeh Davari Tanha

    2011-01-01

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

  16. [Ectopic molar tooth in the maxillary sinus].

    Altun, Hüseyin; Teker, Ayşenur Meriç; Ceran, Murat; Gedikli, Orhan

    2007-01-01

    The development of intranasal ectopic teeth is rare. Although they are more commonly seen in the palate and maxillary sinus, they can also be found in the mandibular condyle, coronoid process, and nasal cavity. A 30-year-old male patient presented with a complaint of headache. Computed tomography of the paranasal sinuses showed a bony mass in the right maxillary sinus wall, 1 cm in size. He did not have any history of maxillofacial trauma or operation. The mass was removed via a Caldwell-Luc procedure. It looked like a tooth. Histopathologic diagnosis was made as ectopic molar tooth. The patient was asymptomatic two weeks after the operation.

  17. PARTIAL INFERIOR TURBINECTOMY FOR INFERIOR TURBINATE HYPERTROPHY: REVIEW OF 30 CASES

    Vishnu

    2016-05-01

    Full Text Available OBJECTIVES To compare the preoperative and postoperative subjective, objective parameters and postoperative complications of 30 patients with nasal obstruction due to inferior turbinate hypertrophy following partial inferior turbinectomy. PATIENTS AND METHODS A prospective observational study involving 30 patients with nasal obstruction due to inferior turbinate hypertrophy was done at SGMC, TVM from January 2014 to June 2015. Patients were evaluated preoperatively and postoperatively based on subjective and objective parameters. Postoperative evaluation was done at day 1, 1 week, 1 month and 3 months based on subjective and objective parameters and postoperative complications. RESULTS Snoring among the study population decreased from 26.7% to 10% at the end of 1 month and was further reduced 3.3% at the end of 3 months. Feeling of nasal obstruction, present in all patients, preoperatively was reduced to 36.7%, 16.7% and 3.3% at the end of 1 week, 1 month, and 3 months respectively. Among preoperative objective parameters, cold spatula test which was showing decreased fogging for all patients initially, following the procedure showed improvement in fogging in 70%, 90%, 100% of patients at the end of 1 week, 1 month and 3 months postoperatively. Anterior rhinoscopy showing large turbinate in all patients preoperatively, showed reduction in turbinate size in 70%, 86.73% and 96.7% at the end of 1 week, 1 month and 3 months respectively. Radiological evidence of enlarged inferior turbinate present in all patients was reduced to 3.3% at the end of 3 months. Occurrence of postoperative reactionary haemorrhage on day 1 was 43.3%. Nasal crust formation was not seen in 6.7% of the patients by the end of 3 months. Nasal pain was seen in 6.7% of the patients at the end of 1 week. Remote sequelae like synechiae and atrophic rhinitis were not reported in any of the patients during the assessment time period. CONCLUSION PIT is an effective technique for

  18. Through the looking glass: understanding non-inferiority

    Wittes Janet T

    2011-05-01

    Full Text Available Abstract Non-inferiority trials test whether a new product is not unacceptably worse than a product already in use. This paper introduces concepts related to non-inferiority, and discusses the regulatory views of both the European Medicines Agency and the United States Food and Drug Administration.

  19. Antibiotic therapy in impacted third molar surgery.

    Monaco, G; Staffolani, C; Gatto, M R; Checchi, L

    1999-12-01

    The use of routine antibiotic therapy in patients undergoing surgical third molar extraction is controversial. The efficacy of antibiotic therapy in preventing postoperative complications following surgical third molar extractions was evaluated in 141 patients. In the test group (66 patients), the protocol utilized a regimen of 2 g of amoxicillin orally daily for 5 d postoperatively, starting at the completion of surgery. In the control group (75 patients), no antibiotic therapy was given. No significant difference was found between the test group and the control group in the incidence of postoperative sequelae, i.e. fever, pain, swelling and alveolar osteitis. A statistically significant association between smoking, habitual drinking and increased postoperative pain and fever was found. Patient age > or = 18 yr was positively correlated with an increased incidence of alveolar osteitis. Swelling was found to be gender-related, in that female patients experienced more swelling than male patients. No correlation was found between the time required for surgery or difficulty of extraction and post-operative pain. In conclusion, no difference was found between patients receiving postoperative amoxicillin and the control group in the incidence of postoperative sequelae.

  20. Molar incisor hypomineralization, prevalence, and etiology.

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

    2014-01-01

    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.

  1. Molar Incisor Hypomineralization, Prevalence, and Etiology

    Sulaiman Mohammed Allazzam

    2014-01-01

    Full Text Available 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.

  2. Onset of molar incisor hypomineralization (MIH).

    Fagrell, Tobias G; Salmon, Phil; Melin, Lisa; Norén, Jörgen G

    2013-01-01

    The etiological factors and timing of the onset of molar incisor hypomineralization (MIH) are still not clear. The aim of this study was to examine ground radial and sagittal sections from teeth diagnosed with MIH using light microscopy, polarized light microscopy and X-ray micro-computed tomography (XMCT) and to estimate the onset and timing of the MIH and to relate the hypomineralized enamel to the incremental lines. Thirteen extracted permanent first molars diagnosed MIH, were analyzed with light microscopy and XMCT. The hypomineralized areas were mainly located in the mesio-buccal cusps, starting at the enamel-dentin-junction and continuing towards the enamel surface. In a relative gray scale analysis the values decreased from the EDJ towards the enamel surface. The findings indicate that the ameloblasts in the hypomineralized enamel are capable of forming an enamel of normal thickness, but with a substantial reduction of their capacity for maturation of enamel. Chronologically, it is estimated that the timing of the disturbance is at a period during the first 6-7 months of age.

  3. Extrações de molares na Ortodontia Molar extractions in orthodontics

    Marco Antônio Schroeder

    2011-12-01

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

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

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

    2015-06-15

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

  5. Neuroregulation of protein synthesis in odontoblasts of the first molar of the rat after wounding.

    Chiego, D J; Avery, J K; Klein, R M

    1987-04-01

    Odontoblasts respond to occlusal trauma by increased elaboration of a matrix which is subsequently calcified to form reparative dentin. The purpose of the present study was to analyze quantitatively and compare the ability of odontoblasts to synthesize collagen after wounding in rats with an intact innervation (baseline) and in rats with sensory (inferior alveolar nerve, IAN) and/or sympathetic (superior cervical ganglion, SCG) surgical denervation. Surgery was performed 7 days prior to wounding. All rats had 1 mm of enamel and dentin removed from the occlusal surface of the first mandibular molar (resected side) with the contralateral tooth serving as a control. Rats were killed 1 h after injection with 3H-proline on days 0, 5, 10 or 15 after wounding, and mandibles were removed and processed for autoradiography. Grain counts were performed over odontoblasts throughout the pulp horns for each time period and for control and experimental molars in intact (baseline) and denervated groups. When compared to the control baseline, the experimental baseline data showed increased 3H-proline uptake throughout the study with a peak at 5 days. When compared to the baseline data, IAN and SCG results demonstrated a delay or attenuation of the protein synthetic response. The results indicate that the sensory and sympathetic neural components may regulate odontoblastic response to wounding.

  6. Extraoral surgical approach of ectopic mandibular third molar to the lower border of mandible.

    Laino, Luigi; Menditti, Dardo; Lo Muzio, Lorenzo; Laino, Gregorio; Lauritano, Floriana; Cicciù, Marco

    2015-05-01

    The surgical removal of impacted lower third molar is an ordinary intervention. The treatment of choice in this pathology is an intraoral or, seldom, extraoral surgical approach. Various surgical procedures have been described to remove ectopic mandibular teeth. The more common technique is an intraoral approach (so named "conservative"), even when the tooth is located in an ectopic area. However, the "intraoral approach" is often related with the difficulty of view, the bleeding of the surgical site, and with the possible lesions of inferior alveolar or lingual nerve. From the other side, a nonconservative surgical approach like "extraoral pathway" may be associated with no aesthetic cutaneous postoperative scar tissue. The aim of those 2 study cases is to highlight the management of infected ectopic third molars located close to the lower border of the mandibular body, underlining the anatomical land markers of the submandibular area. The authors have applied the extraoral pathway using an incision of small size. From our analysis, the treatment of those typical can be managed by using a "mini-skin-incision" (so termed as mini-submandibular approach) respecting the cosmetic expectations of the patients.

  7. DENS INVAGINATUS BILATERAL EM PRIMEIRO MOLAR MANDIBULAR EM CÃO

    Floriano Pinheiro Silva

    2006-10-01

    Full Text Available Atendeu-se a uma cadela da raça maltês, de quatro anos de idade, com queixa de mau hálito e presença de tártaros. À anamnese relatou-se que o animal havia sido submetida anteriormente a três procedimentos de tratamento periodontal, sempre sem a necessidade de anestesia. Submetida à anestesia geral, a cadela foi clinicamente examinada, evidenciando-se a presença de lesão degenerativa na face vestibular dos primeiros molares mandibulares esquerdo e direito, que após exame radiológico diagnosticou-se como Dens invaginatus. Observou-se alteração da morfologia dentária dos dentes envolvidos, evidenciada radiograficamente como áreas radiopacas, demonstrando alteração da morfologia do canal em ambos os elementos e reabsorção da raiz distal do primeiro pré-molar inferior direito. PALAVRAS-CHAVE: Dens invaginatus, dens in dente, exodontia.

  8. Displacement of maxillary third molar into the lateral pharyngeal space.

    Lee, Doksa; Ishii, Syoichiro; Yakushiji, Noboru

    2013-10-01

    Iatrogenic tooth displacement is a rare complication during extraction of impacted molars, but displacement of a maxillary third molar into the maxillary sinus, infratemporal fossa, buccal space, pterygomandibular space, and lateral pharyngeal space has been reported. Currently, 6 published reports describe third molar displacement into the lateral pharyngeal space, only 1 of which involved the loss of a maxillary third molar into this area, which occurred after an attempted self-extraction by the patient. There have been no reported cases of iatrogenic displacement of the maxillary third molar during an extraction procedure. This article describes the recovery, under general anesthesia, of a maxillary third molar from the lateral pharyngeal space after an iatrogenic displacement.

  9. Autotransplantation of Mandibular Third Molar: A Case Report

    Pabbati Ravi kumar

    2012-01-01

    Full Text Available Autogenous transplantation is a feasible, fast, and economical option for the treatment of nonsalvageable teeth when a suitable donor tooth is available. This paper presents successful autotransplantation of a mature mandibular left third molar (38 without anatomical variances is used to replace a mandibular left second molar (37. The mandibular second molar was nonrestorable due to extensive root caries and resorption of distal root. After extraction of mandibular second and third molars, root canal therapy was done for the third molar extraorally, and the tooth was reimplanted into the extracted socket of second molar site. After one year, clinical and radiographic examination revealed satisfactory outcome with no signs or symptoms suggestive of pathology. In selected cases, autogenous tooth transplantation, even after complete root formation of the donor tooth, may be considered as a practical treatment alternative to conventional prosthetic rehabilitation or implant treatment.

  10. Comparison of the efficacy of two anesthetic techniques of mandibular primary first molar: A randomized clinical trial

    Davood Ghasemi Tudeshchoie

    2013-01-01

    Full Text Available Background: The most common technique to anesthetize mandibular primary teeth is inferior alveolar (I.A nerve block injection which induces a relatively sustained anesthesia and in turn may potentially traumatize soft-tissues. Therefore, the need of having an alternative technique of anesthesia with a shorter term but the same efficacy is reasonable. The aim of this study was a comparison of the efficacy of two anesthetic techniques of mandibular primary first molar. Materials and Methods: In this randomized crossover clinical trial, 40 children with ages ranged from 5 years to 8 years whose mandibular primary first molars were eligible for pulpotomy, were selected and divided randomly into two groups. The right and left mandibular first molars of group A were anesthetized with infiltration and I. A nerve block techniques in the first and second sessions respectively. The left and right mandibular first molars of group B were anesthetized with I.A nerve block and infiltration techniques in the first and second sessions respectively. The severity of pain were measured and recorded according to sound-eye-motor scale by a certain person. Data was analyzed using Wilcoxon Signed Rank and Mann-Whitney U tests (P < 0.05. Results: The severity of pain was lower in infiltration technique versus I.A nerve block. There were no significant differences between the severities of pain on pulpal exposure of two techniques. Conclusion: It seems that infiltration technique is more favorable to anesthetize the mandibular primary first molar compared to I.A nerve block.

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

    Shinohara Elio; Kaba Shajadi; Pedron Irineu; Imparato Jose

    2010-01-01

    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 impa...

  12. Some morphological features related to mandibular third molar impaction

    Kaya, Göksel Şimşek; ASLAN, MUZAFFER; Omezli, M. Melih; DAYI, Ertunç

    2010-01-01

    Objective: The aim of this study was to evaluate the effect of some morphological features of the mandible and mandibular permanent molars on impaction of mandibular third molars with panoramic measurements in a Turkish patient group. Study design: Standardized panoramic radiography variables compiled from 140 patients retrospectively were eva- luated. Predictive variables included mesio-distal crown width and inclination of the mandibular molars, vertical and horizo...

  13. Possibilty of the lower third molar eruption: Radiographic analysis

    2006-01-01

    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...

  14. Molar incisor hypomineralization: an aesthetic conservative restorative approach

    Silva-junior, Manoelito Ferreira; Assis,Rahyza Inácio Freire de; PAZINATTO,Flávia Bittencourt

    2016-01-01

    ABSTRACT The aim this study is to present a clinical case of conservative aesthetic restorative treatment of teeth 11 and 21 in a patient diagnosed with molar incisor hypomineralization. An 18-year-old female patient came to the Outpatient Restorative Dentistry Clinic at the Federal University of Espírito Santo, complaining mainly of not feeling comfortable with a color change in her anterior teeth. Molar incisor hypomineralization was diagnosed in molars and incisors and the negative psychos...

  15. Ceramic onlay for endodontically treated mandibular molar

    Roopadevi Garlapati

    2014-01-01

    Full Text Available Restoration of endodontically treated teeth is important for the success of endodontic treatment. In full coverage restorations, maximum amount of tooth structure is compromised, so as to conserve the amount of tooth structure partial coverage restorations, can be preferred. This case report is on fabrication of a conservative tooth colored restoration for an endodontically treated posterior tooth. A 22-year-old male patient presented with pain in the mandibular left first molar. After endodontic treatment, composite material was used as postendodontic restoration. The tooth was then prepared to receive a ceramic onlay and bonded with self-adhesive universal resin cement. Ceramic onlay restoration was periodically examined up to 2 years.

  16. Stepwise excavation in a permanent molar

    Lima, Fernanda Ferruzzi; Pascotto, Renata Corrêa; Benetti, Ana Raquel

    2010-01-01

    The current study presents a 17-year clinical report of stepwise excavation and indirect pulp capping in a lower right first molar, with great dentin destruction and a lack of dentin support of the cusps. At the first appointment, indirect pulp capping with calcium hydroxide and a temporary filling...... with zinc oxide cement were performed to minimize the risk of pulp exposure during excavation. After 45 days, the remaining carious tissue was removed and a restoration with glass-ionomer lining (Vitrebond) and resin composite (P-50) was performed. Satisfactory morphology and function of the restoration...... and pulp vitality were preserved for 17 years, thus indicating that stepwise excavation can be a good treatment alternative in selected cases....

  17. Molar extinction coefficients of some fatty acids

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

    2002-10-01

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

  18. Amoxicillin may cause molar incisor hypomineralization.

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

    2009-02-01

    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.

  19. Bilateral Transverse Mandibular Second Molars: A Case Report

    James Puryer

    2016-11-01

    Full Text Available Impaction of mandibular second permanent molars is a rare occurrence, with prevalence rates reported to be between 0.65% and 2.0%. In the absence of systemic conditions, impactions are usually unilateral. There appears to be no consensus as to the optimal treatment for impacted mandibular second molars and treatment plans will be based upon the individual case. Treatment may involve orthodontics and/or various surgical techniques, and early diagnosis is important. This paper presents an unusual case of bilateral transverse impaction of both mandibular second and third molars that was diagnosed at 18 years of age. All impacted molars were extracted.

  20. Distal caries of the second molar in the presence of a mandibular third molar - a prevention protocol.

    Toedtling, V; Coulthard, P; Thackray, G

    2016-09-23

    Objectives The objectives of the prospective study were to establish the prevalence of distal caries (DC) in the mandibular second molar and to assess the outcomes of these diseased teeth in our population. Further aims were to identify associated risk factors and to design a protocol for prevention.Methods Clinical and radiographic data from 210 consecutive patients were ascertained over a three-month period. The sample population included all patients who had been referred to a hospital oral surgery department for a lower wisdom tooth assessment.Results A total of 224 mandibular third molars were included and assessed. The prevalence of caries affecting the distal aspect of the second molar was 38% (n = 85) in this population. In 18% of patients there was evidence of early enamel caries. Fifty-eight percent of caries was managed with restorative treatment but 11% of patients required second molar extraction and 13% of patients required the removal of the second and third molars. The prevalence of distal caries was significantly higher in patients with partially erupted wisdom teeth positioned below the amelocemental junction (P molar and in patients who presented with mesioangular impactions (P molars are useful disease predictors which can be used to indicate the likelihood of a caries process occurring on the distal aspect of the second mandibular molar. If patients' third molar teeth are not removed then consideration needs to be given to prevention and regular monitoring.

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

    Barka G

    2012-05-01

    Full Text Available Georgia Barka,1 Georgios Tretiakov,1 Theodosios Theodosiou,2 Ioulia Ioannidou-Marathiotou31School of Dentistry, 2Biostatistics, Department of Informatics, School of Natural Sciences, 3Department of Orthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, GreeceObjective: The purpose of the present study was to investigate the frequency of presence of third molar teeth and their distribution in each jaw and each side, according to sex, in a group of orthodontic patients with permanent dentition from northern Greece.Methods: The sample included panoramic radiographs from 220 patients with permanent dentition (mean age 13.62 ± 1.81. The Χ2 test was used to assess the relationships between the variables, and the Fisher's exact test was used in cases where the expected frequencies in each cell were <5.Results: The frequency of third molar presence was 79.1%, and 20.9% was the frequency of third molar agenesis. Intersexual differences in the number of third molars was not statistically significant. There was a correlation between the distribution of third molars on the right and the left side (Fisher's exact test = 100.788; P = 0. The two sides showed the same tendency toward the presence or absence of third molars. A correlation was also found between the distribution of maxillary and mandibular third molars (Fisher's exact test = 24.372; P = 0. In each jaw, the presence or absence of third molars was highly related to the number of third molars found in the other jaw.Conclusion: The present results showed that in this orthodontic group of northern Greek patients, presence accounted for 79.1% and agenesis for 20.9%. No significant difference was found between the frequencies of third molar presence on the left and right sides in either the maxilla or mandible.Keywords: third molars, presence, orthodontic population, Greeks

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

    Ivan Tadeu Pinheiro da Silva

    2010-08-01

    Full Text Available A má oclusão Classe I de Angle é caracterizada por uma relação anteroposterior normal nos molares, que pode ou não estar acompanhada por alterações esqueléticas - nos planos vertical ou transverso - ou dentárias. A biprotrusão, revelada pela inclinação acentuada dos incisivos superiores e inferiores para vestibular, somada ao trespasse horizontal excessivo, faz com que o paciente fique mais exposto a traumas dentários, além de causar comprometimento estético. A escolha dos dentes a serem extraídos para a correção, geralmente, recai sobre os primeiros ou segundos pré-molares, devido à sua posição na arcada. Contudo, a extração do primeiro molar permanente, em função de algum comprometimento, por cárie ou restauração extensa, pode ser uma alternativa, proporcionando a manutenção de um dente hígido em detrimento de outro já manipulado. O presente caso, tratado de maneira incomum, pela extração dos quatro primeiros molares permanentes, foi apresentado à Diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 2, como parte dos requisitos para a obtenção do título de diplomado pelo BBO.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

  3. Longitudinal Treatment Outcomes of Microsurgical Treatment of Neurosensory Deficit after Lower Third Molar Surgery: A Prospective Case Series.

    Yiu Yan Leung

    Full Text Available To prospectively evaluate the longitudinal subjective and objective outcomes of the microsurgical treatment of lingual nerve (LN and inferior alveolar nerve (IAN injury after third molar surgery.A 1-year longitudinal observational study was conducted on patients who received LN or IAN repair after third molar surgery-induced nerve injury. Subjective assessments ("numbness", "hyperaesthesia", "pain", "taste disturbance", "speech" and "social life impact" and objective assessments (light touch threshold, two-point discrimination, pain threshold, and taste discrimination were recorded.12 patients (10 females with 10 LN and 2 IAN repairs were recruited. The subjective outcomes at post-operative 12 months for LN and IAN repair were improved. "Pain" and "hyperaesthesia" were most drastically improved. Light touch threshold improved from 44.7 g to 1.2 g for LN repair and 2 g to 0.5 g for IAN repair.Microsurgical treatment of moderate to severe LN injury after lower third molar surgery offered significant subjective and objective sensory improvements. 100% FSR was achieved at post-operative 6 months.

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

    A. Guerrouani

    2013-01-01

    Full Text Available 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.

  5. Elongational viscosity of narrow molar mass distribution polystyrene

    Bach, Anders; Almdal, Kristoffer; Rasmussen, Henrik Koblitz;

    2003-01-01

    Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises...

  6. Incomplete molar pregnancy with live coexisting fetus: a case report

    Leila Pourali

    2014-03-01

    Conclusion: The rate of pregnancy complications such as hypertension, hyperthyroidism, and obstetrics hemorrhage and also the risk of Gestational Trophoblastic Neoplasm (GTN are increasing in incomplete molar pregnancy. Therefore, early diagnosis and timely treatment of molar pregnancy is very important to reduce maternal morbidity and mortality.

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

    Daly, Dympna

    2009-04-01

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

  8. Changes in heart rate during third molar surgery

    Hollander, M H J; Schortinghuis, J; Vissink, A

    2016-01-01

    Anxiety is an undesirable psychological phenomenon. Patients are usually anxious when subjected to third molar surgery, but the pattern of anxiety is unknown. The aim of this study was to assess the intensity and course of anxiety during third molar surgery. This study included 48 consecutive patien

  9. Possibilty of the lower third molar eruption: Radiographic analysis

    Nedeljković Nenad

    2006-01-01

    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

  10. Pulpotomies with portland cement in human primary molars

    Taísa Regina Conti

    2009-02-01

    Full Text Available Two clinical cases in which Portland cement (PC was applied as a medicament after pulpotomy of mandibular primary molars in children are presented. Pulpotomy using PC was carried out in two mandibular first molars and one mandibular second molar, which were further followed-up. At the 3, 6 and 12-month follow-up appointments, clinical and radiographic examinations of the pulpotomized teeth and their periradicular area revealed that the treatments were successful in maintaining the teeth asymptomatic and preserving pulpal vitality. Additionally, the formation of a dentin bridge immediately below the PC could be observed in the three molars treated. PC may be considered as an effective alternative for primary molar pulpotomies, at least in a short-term period. Randomized clinical trials with human teeth are required in order to determine the suitability of PC before unlimited clinical use can be recommended.

  11. Management of third molar teeth from an endodontic perspective

    Hany Mohamed Aly Ahmed

    2012-01-01

    Full Text Available Third molar teeth are subject to many dental complications because of their most posterior location, aberrant occlusal anatomy and abnormal eruption patterns. Owing to these anatomical limitations, their extraction remains the treatment of choice for many dental practitioners. Despite being a common dental procedure, minimum intervention and retaining every functional component of the dental arch are of prime importance in contemporary dental practice. As such, this review aims to discuss the application of this conservative approach on third molar teeth from an endodontic perspective. The internal and external root anatomy of maxillary and mandibular third molars and their relation to the surrounding vital structures are described. These anatomical landmarks are then correlated to the decision making for endodontic treatment strategies of third molars. In addition, the recommended guidelines that should be followed while commencing endodontic treatment in third molars are outlined.

  12. Extinction as discrimination: the molar view.

    Baum, William M

    2012-05-01

    The traditional molecular view of behavior explains extinction as the dissipation or inhibition of strength, formerly built up by contiguous reinforcement. In obstinate opposition to this explanation was the partial-reinforcement extinction effect: a partially reinforced response extinguishes more slowly than a continuously reinforced response. It suggests instead that extinction is discrimination. Four pigeons were exposed to daily sessions in which a variable period of food delivery, produced by pecking on a variable-interval schedule, was followed by extinction. The rate of food delivery was varied over a wide range across conditions. Varying the amount of food per delivery inversely with rate of delivery kept response rate from varying excessively. The results confirmed and extended the partial-reinforcement effect; persistence of pecking and time to extinction were inversely related to rate of obtaining food. The results support the molar view of extinction, not as loss of strength of a particular discrete response, but as a transition from one allocation of time among activities to another. Although molecular theories dismiss discrimination due to repeated training and extinction as an impurity or complication, repeated cycles of availability and privation are probably typical of the environment in which most vertebrate species evolved.

  13. Anterior transposition of the inferior oblique muscle as the initial treatment of a snapped inferior rectus muscle.

    Aguirre-Aquino, B I; Riemann, C D; Lewis, H; Traboulsi, E I

    2001-02-01

    Snapping or tearing of an extraocular muscle refers to its rupture across its width, usually at the junction between muscle and tendon several millimeters behind the insertion. Tearing occurs during strabismus or retinal reattachment surgery, or after trauma. If the proximal end of the muscle cannot be located, transposition procedures are necessary to achieve ocular realignment. These surgical procedures carry the risk of anterior segment ischemia, especially in the elderly. Anterior transposition of the inferior oblique muscle has been used for the treatment of inferior oblique overaction, especially in the presence of a dissociated vertical deviation, and in patients with fourth nerve palsy. We transposed the inferior oblique muscle insertion in a 73-year-old woman with a snapped inferior rectus muscle.

  14. Extraction of maxillary first molars improves second and third molar inclinations in Class II Division 1 malocclusion

    Livas, C.; Halazonetis, D.J.; Booij, J.W.; Katsaros, C.

    2011-01-01

    INTRODUCTION: The aim of this study was to assess the changes in inclination of the maxillary second (M2) and third (M3) molars after orthodontic treatment of Class II Division 1 malocclusion with extraction of maxillary first molars. METHODS: Two groups of subjects were studied. The experimental gr

  15. Effect of modified inferior oblique anterior transposition on dissociated vertical strabismus patients with inferior oblique muscle hyperfunction

    Xi-Lang Wang

    2017-02-01

    Full Text Available AIM: To investigate the effect of anterior transposition of inferior oblique muscle on the treatment of dissociated vertical deviation(DVDin children with inferior oblique overaction(IOOAand unequal inferior oblique transposition of the treatment of IOOA with the eyes of the asymmetry of DVD efficacy, associated with the lower oblique hyperfunction DVD patients to provide more effective treatment. METHODS: Eighty patients with hyperfunction who were treated in our hospital from January 2014 to December 2015 were randomly selected and treated with anterior transposition of inferior oblique muscle. Patients were followed up for 1 to 30mo. We compared the vertical incline at the original incline from far(5m, near(33cmdistance and IOOA degree before and after operations, and the correlation between the two. We also compared the vertical incline at the original incline from far(5m, near(33cmdistance and IOOA degree before and after operations in 30 eyes(20 patientswith bilateral asymmetry DVD and IOOA who received unequal inferior oblique transposition. The incidence of antielevation syndrome(AESwas observed after operations. RESULTS: The mean prism diopters(PDat 5m before operations was 19.5±0.15, the average PD after operations was 3.5±0.18, at 5m the original incline was 16±0.21PD. The mean PD at 33cm was 18.6±0.20 before operation, 4.5±0.26 after operations, and 14.1±0.16 at 33cm the original incline, the difference was statistically significant(Pr=0.554, Pr=0.454, P PPCONCLUSION: Anterior transposition of the inferior oblique muscle has a good therapeutic effect on isolated vertical strabismus patients with inferior oblique hyperfunction. While the incidence of postoperative AES is low in patients received unequal inferior oblique muscle transposition.

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

    Patrícia Daniela Melchiors Angst

    2013-02-01

    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.

  17. Human third molars development: Comparison of 9 country specific populations.

    Thevissen, P W; Fieuws, S; Willems, G

    2010-09-10

    The majority of age estimation models based on third molar development are constructed on samples from populations with described and outlined origin. Due to unlike research protocols these studies can rarely be compared for the evaluation of possible geographical or ethnical influences on third molar development. The aim of this study is to evaluate country specific third molar development on standardized collected and analyzed data. On panoramic radiographs selected from subjects out of 9 country specific populations (Belgium, China, Japan, Korea, Poland, Thailand, Turkey, Saudi-Arabia and South-India) the four third molar scores were registered, according to a modified Gleiser and Hunt methodology. To obtain for each subject a (factor) score which represents the degree of third molar development, a generalized linear mixed model for multivariate ordinal data was fitted on the repeated third molar scores. Differences between countries are analyzed using gender-specific regression models for these factor scores with age and country as predictors. Comparisons between countries revealed differences in speed and onset of development. However, although reaching statistical significance, differences in actual value were small and not constant over the considered age range. In all countries, at all ages, males were ahead in third molar development compared to females.

  18. Successful inferior alveolar nerve decompression for dysesthesia following endodontic treatment: report of 4 cases treated by mandibular sagittal osteotomy.

    Scolozzi, Paolo; Lombardi, Tommaso; Jaques, Bertrand

    2004-05-01

    Endodontic overfilling involving the mandibular canal may cause an injury of the inferior alveolar nerve (IAN) resulting in disabling sensory disturbances such as pain, dysesthesia, paresthesia, hypoesthesia, or anesthesia. Two fundamental mechanisms are responsible for the injury: the chemical neurotoxicity and the mechanical compression caused by the extruded material. Although spontaneous resorption has been described for some materials, early surgical exploration with removal of the material and decompression of the IAN should be performed, irrespective of the material used, given that the importance of nerve damage increases with the duration of the injury. We report 4 cases of disabling dysesthesia and paresthesia following endodontic treatment of lower molars in which sagittal osteotomy was used to remove the endodontic paste and to perform nerve decompression. All the patients experienced immediate relief of dysesthesia and paresthesia.

  19. Molar Pregnancy with a Co-Existing Viable Fetus

    Ruya Deveer

    2014-03-01

    Full Text Available     The aim of this study was to report the clinical features, management, and outcome of a case of molar pregnancy with a coexisting viable fetus and to review the literature. In this article, we report a case of pregnancy with diffuse placental molar change and a normal fetus which presented with hyperemesis gravidarum and hyperthyroidism. Genetic amniocentesis showed normal fetal karyotype. A healthy full-term live male infant was delivered by cesarean section. In molar pregnancies with a normal karyotype fetus, with intensive maternal follow-up, continuation of pregnancy can be suggested.

  20. Management of a Severely Submerged Primary Molar: A Case Report

    Iman Parisay

    2013-01-01

    Full Text Available Ankylosis is a condition frequently associated with primary molars, wherein the ankylosed primary teeth remain in a fixed position, while the adjacent teeth continue to erupt, moving occlusally. In this case report, a five-year-old boy, who had a retained and submerged left lower second primary molar, was presented. Luxation of ankylosed primary molar was considered as a treatment approach. After four months, the tooth erupted to the occlusal level, and there was evidence of further development of a permanent successor in radiographic evaluation. After one year, tooth mobility, bone formation, and development of a permanent successor were in good condition.

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

    Chandragirish S

    2014-11-01

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

  2. Inferior Flap Tympanoplasty: A Novel Technique for Anterior Perforation Closure

    Haim Gavriel

    2013-01-01

    Full Text Available Objective. To report a novel tympanoplasty modification for anterior tympanic membrane perforation closure. Materials and Methods. A prospective study on 13 patients who underwent inferior tympanoplasty between December 2008 and May 2011 was carried out. In our technique, an inferior rather than a posterior flap is raised and the graft is laid from the inferior direction to obtain better access to the anterior part of the tympanic membrane perforation and provide better support. Results. A total of 13 patients underwent the novel inferior tympanoplasty technique with a mean age of 33 years. Six patients had undergone tympanoplasties and/or mastoidectomies in the past, 3 in the contralateral ear. A marginal perforation was observed in 3 cases, total perforation in 2 and subtotal in 1 case. The mean preoperative pure-tone average was 40.4 dB (10 to 90 dB, compared to 26.5 dB (10 to 55 dB postoperatively. All perforations were found to be closed but one (92.3% success rate. Conclusions. The inferior tympanoplasty technique provides a favorable outcome in terms of tympanic membrane closure and hearing improvement for anterior perforations, even in difficult and complex cases. It is based on a well-known technique and is easy to implement.

  3. The effects of inferior olive lesion on strychnine seizure

    Anderson, M.C.; Chung, E.Y.; Van Woert, M.H. (Mount Sinai School of Medicine, New York, NY (USA))

    1990-10-01

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

  4. Inferior oblique muscle paresis as a sign of myasthenia gravis.

    Almog, Yehoshua; Ben-David, Merav; Nemet, Arie Y

    2016-03-01

    Myasthenia gravis may affect any of the six extra-ocular muscles, masquerading as any type of ocular motor pathology. The frequency of involvement of each muscle is not well established in the medical literature. This study was designed to determine whether a specific muscle or combination of muscles tends to be predominantly affected. This retrospective review included 30 patients with a clinical diagnosis of myasthenia gravis who had extra-ocular muscle involvement with diplopia at presentation. The diagnosis was confirmed by at least one of the following tests: Tensilon test, acetylcholine receptor antibodies, thymoma on chest CT scan, or suggestive electromyography. Frequency of involvement of each muscle in this cohort was inferior oblique 19 (63.3%), lateral rectus nine (30%), superior rectus four (13.3%), inferior rectus six (20%), medial rectus four (13.3%), and superior oblique three (10%). The inferior oblique was involved more often than any other muscle (pmyasthenia gravis can be difficult, because the disease may mimic every pupil-sparing pattern of ocular misalignment. In addition diplopia caused by paresis of the inferior oblique muscle is rarely encountered (other than as a part of oculomotor nerve palsy). Hence, when a patient presents with vertical diplopia resulting from an isolated inferior oblique palsy, myasthenic etiology should be highly suspected.

  5. Hipomineralização molar-incisivo = Molar incisor hypomineralization

    Basso, Ana Paula

    2007-01-01

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

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

    Ramezanian M

    2003-06-01

    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.

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

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

    2014-06-15

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

  8. Morbilidad de la extracción de los terceros molares en pacientes entre los 12 y 18 años de edad

    Chaparro Avendaño, Angie V.; Pérez-García, Sílvia; Valmaseda Castellón, Eduardo; Berini Aytés, Leonardo; Gay Escoda, Cosme

    2005-01-01

    Objetivo: El propósito de este estudio fue analizar la incidencia de complicaciones después de la extracción quirúrgica de los terceros molares en pacientes de 12 a 18 años de edad. Pacientes y método: Se realizó un estudio retrospectivo de 390 extracciones quirúgicas de terceros molares superiores e inferiores en 173 pacientes en edades comprendidas entre los 12 y 18 años de edad, intervenidos bajo anestesia locorregional en el año 2000 en el Máster de Cirugía Bucal e Implantología Bucofacia...

  9. THE DEBATE ON THE ORIGIN OF MOLAR-TOOTH STRUCTURES%Molar-Tooth构造成因争论分析

    陈永红

    2006-01-01

    综述了Molar-Tooth的时空分布及其形态特征,Molar-Tooth为元古代时期全球性的一种构造现象.其成因,地质学家们已争论了一个多世纪,直到今天还未取得一致的认识.归纳前人的研究成果,初步认为Molar-Tooth的成因与藻类等生物活动有关.

  10. Excess Molar Volume of Binary Systems Containing Mesitylene

    Morávková, L.

    2013-05-01

    Full Text Available This paper presents a review of density measurements for binary systems containing 1,3,5-trimethylbenzene (mesitylene with a variety of organic compounds at atmospheric pressure. Literature data of the binary systems were divided into nine basic groups by the type of contained organic compound with mesitylene. The excess molar volumes calculated from the experimental density values have been compared with literature data. Densities were measured by a few experimental methods, namely using a pycnometer, a dilatometer or a commercial apparatus. The overview of the experimental data and shape of the excess molar volume curve versus mole fraction is presented in this paper. The excess molar volumes were correlated by Redlich–Kister equation. The standard deviations for fitting of excess molar volume versus mole fraction are compared. Found literature data cover a huge temperature range from (288.15 to 343.15 K.

  11. Cementoblastoma Relating to Right Mandibular Second Primary Molar

    Manepalli, Swapna; Mohapatra, Abinash

    2016-01-01

    Cementoblastoma is a benign lesion of the odontogenic ectomesenchymal origin. It rarely occurs in primary dentition. This report describes a case of a cementoblastoma relating to the right mandibular second primary molar in a 7-year-old girl. Her panoramic radiograph revealed a well-defined radiopaque lesion with a radiolucent border extending from the distal surface of the mandibular right first primary molar to the distal surface of mandibular second primary molar. The tumor was attached to the mesial root of primary second molar and was excised along with the teeth involved and sent for histopathological evaluation, which showed irregular trabeculae of mineralized tissue interspersed with fibrovascular connective tissue, trabeculae of mineralized tissue with prominent reversal lines, and peripheral rimming of the mineralized tissue with blast cells. On a six-month follow-up, there has been no recurrence of the lesion. PMID:27738532

  12. Prediction of postoperative pain after mandibular third molar surgery

    Rudin, Asa; Eriksson, Lars; Liedholm, Rolf;

    2010-01-01

    To evaluate the predictive potential of preoperative psychological and psychophysiological variables in estimating severity of postoperative pain following mandibular third molar surgery (MTMS). Methods: Following ethical committee approval and informed consent, 40 consecutive patients scheduled...

  13. Molar tooth carbonates and benthic methane fluxes in Proterozoic oceans.

    Shen, B.; Dong, L.; S. Xiao; Lang, X; K. Huang; Peng, Y.; C. Zhou; Ke, S; Liu, P

    2016-01-01

    Molar tooth structures are ptygmatically folded and microspar-filled structures common in early- and mid-Proterozoic (∼2,500-750 million years ago, Ma) subtidal successions, but extremely rare in rocks

  14. Molar tooth carbonates and benthic methane fluxes in Proterozoic oceans

    Shen, Bing; Dong, Lin; Xiao, Shuhai; Lang, Xianguo; Huang, Kangjun; Peng, Yongbo; Zhou, Chuanming; Ke, Shan; Liu, Pengju

    2016-01-01

    Molar tooth structures are ptygmatically folded and microspar-filled structures common in early- and mid-Proterozoic (∼2,500–750 million years ago, Ma) subtidal successions, but extremely rare in rocks

  15. Prediction of postoperative pain after mandibular third molar surgery

    Rudin, Asa; Eriksson, Lars; Liedholm, Rolf

    2010-01-01

    To evaluate the predictive potential of preoperative psychological and psychophysiological variables in estimating severity of postoperative pain following mandibular third molar surgery (MTMS). Methods: Following ethical committee approval and informed consent, 40 consecutive patients scheduled ...

  16. On the Etiology of Molar-Incisor Hypomineralization.

    Vieira, Alexandre R; Kup, Elaine

    Molar-incisor hypomineralization (MIH) is a condition that is defined based on its peculiar clinical presentation. Reports on the etiology of the condition and possible risk factors are inconclusive and the original suggestion that MIH is an idiopathic condition is often cited. Our group was the first to suggest MIH has a genetic component that involves genetic variation in genes expressed during dental enamel formation. In this report, we provide a rationale to explain the preferential affection of molars and incisors. We suggest that MIH is a genetic condition based on its prevalence, which varies depending on the geographic location, and the evidence that on occasion second primary molars, permanent canines, and premolars can show signs of hypomineralization of enamel when molars and incisors are affected.

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

    Weerheijm, K L

    2004-01-01

    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.

  18. Implicación de la erupción de los terceros molares en el apiñamiento anteroinferior severo

    J. Bustillo Arrieta

    2016-01-01

    Objetivo: Estimar el grado de asociación entre el apiñamiento anteroinferior y la presencia de terceros molares inferiores en modelos de estudio y radiografías panorámicas de pacientes atendidos en el Postgrado de Ortodoncia de la Facultad de Odontología de la Universidad de Cartagena y centros de atención odontológica y radiológica de la ciudad de Cartagena. Diseño del estudio: Estudio de corte transversal. Emplazamiento: Facultad de Odontología de la Universidad de Cartagena de Indias (Colo...

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

    Cobo Vázquez, Carlos M.

    2013-01-01

    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 tempranos, segui...

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

    Clovis Luis Konopka

    2010-09-01

    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.

  1. Denervation-induced changes in cell proliferation in the rat molar after wounding.

    Chiego, D J; Klein, R M; Avery, J K; Gruhl, I M

    1986-04-01

    The dental pulp has the capacity to initiate and maintain repair after trauma. The purpose of the present study was to quantitatively analyze the role of the peripheral nervous system in regulation of pulpal cell proliferation in response to wounding. Six groups of ten rats were used in these studies. There was one baseline group (wounded, but innervation intact) and five resection groups. The resection groups included rats with unilateral superior cervical ganglionectomy (SCG), unilateral inferior alveolar nerve resection (IAN), unilateral chorda tympani (CT) resection, IAN + SCG, or a complete unilateral nerve resection (IAN + SCG + CT). One millimeter of enamel and dentin was removed from the first mandibular molar on the experimental (resected) side. Therefore, each rat had an experimental and control molar. Rats were killed at various intervals from day 0 to day 15 after wounding and received 0.5 muCi/g b.wt. 3H-thymidine 1 hour before death. For the baseline (innervation intact) data a peak in 3H-thymidine incorporation occurred at 5 days after wounding. In the resected groups, there was a general increase in the number of labeled cells at the zero time point, and a suppression of the 5-day peak with a delay in the proliferative response to wounding. The SCG + IAN-resected group maintained the lowest number of labeled cells throughout the entire experimental period compared to the experimental baseline data and the two controls. At the initial and termination points the SCG + IAN-resected groups demonstrated the highest number of labeled cells.(ABSTRACT TRUNCATED AT 250 WORDS)

  2. Analysis of potential dynamic concealed factors in the difficulty of lower third molar extraction

    Singh, Pradeep; Ajmera, Deepal-Haresh; Xiao, Shui-Sheng; Liu, Xiong; Peng, Bin

    2016-01-01

    Background The purpose of this study was to identify potential concealed variables associated with the difficulty of lower third molar (M3) extractions. Material and Methods To address the research purpose, we implemented a prospective study and enrolled a sample of subjects presenting for M3 removal. Predictor variables were categorized into Group-I and Group-II, based on predetermined criteria. The primary outcome variable was the difficulty of extraction, measured as extraction time. Appropriate univariate and multivariate statistics were computed using ordinal logistic regression. Results The sample comprised of 1235 subjects with a mean age of 29.49 +/- 8.92 years in Group-I and 26.20 +/- 11.55 years in Group-II subjects. The mean operating time per M3 extraction was 21.24 +/- 12.80 and 20.24 +/- 12.50 minutes for Group-I and Group-II subjects respectively. Three linear parameters including B-M2 height (distance between imaginary point B on the inferior border of mandibular body, and M2), lingual cortical thickness, bone density and one angular parameter including Rc-Cs angle (angle between ramus curvature and curve of spee), in addition to patient’s age, profile type, facial type, cant of occlusal plane, and decreased overbite, were found to be statistically associated (P < or = 0.05) with extraction difficulty under regression models. Conclusions In conclusion, our study indicates that the difficulty of lower M3 extractions is possibly governed by morphological and biomechanical factors with substantial influence of myofunctional factors. Practical Implications: Preoperative evaluation of dynamic concealed factors may not only help in envisaging the difficulty and planning of surgical approach but might also help in better time management in clinical practice. Key words:Third molar, impacted, extraction, mandibular, facial type. PMID:27694781

  3. The orthodontic extraction of permanent molars: a literature review.

    Chua, Emilia S L; Felicita, A Sumathi

    2015-05-01

    The most common cause of dental crowding is the presence of an arch-length--tooth-size discrepancy. Conventional methods of gaining space in orthodontics involve the extraction of teeth, often premolars. However, there are a number of clinical situations in which the extraction of permanent molars might be considered. This paper highlights the indications, advantages, disadvantages and timing of the extraction of the first, second and third permanent molars in the treatment of a crowded malocclusion.

  4. Iatrogenic Mandibular Fracture Associated with Third Molar Removal

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

    2011-01-01

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

  5. Iatrogenic Mandibular Fracture Associated with Third Molar Removal

    Abdulkadir Burak Cankaya, Mehmet Ali Erdem, Sabri Cemil Isler, Sabit Demircan, Merva Soluk, Cetin Kasapoglu, Cuneyt Korhan Oral

    2011-01-01

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

  6. Use of sevoflurane inhalation sedation for outpatient third molar surgery.

    Ganzberg, S.; Weaver, J.; Beck, F. M.; McCaffrey, G

    1999-01-01

    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...

  7. Fusion or gemination? An unusual mandibular second molar

    Angela Jordão Camargo

    2016-01-01

    Full Text Available Fusion and gemination is not an uncommon finding and affected most primary dentition and the permanent maxillary incisors. These changes can develop a series of complication. A 11-year-old male presented radiography finding: an unusual mandibular second molar. A well-documented case brings a challenge for radiologists classify between fusion and gemination. In conclusion, this alteration although common in other regions, there are no case in the literature involving “second and third” molar.

  8. Quality of analgesia after lower third molar surgery: A randomised, double-blind study of levobupivacaine, bupivacaine and lidocaine with epinephrine

    Brajković Denis

    2015-01-01

    Full Text Available Background/Aim. Surgical extraction of lower third molars is followed by mild or severe postoperative pain which peaks at maximal intensity in the first 12 hours and has a significant impact on a patient’s postoperative quality of life. The use of long-acting local anaesthetics is a promising strategy to improve postoperative analgesia. The aim of the present study was to investigate analgesic parameters and patient satisfaction after using 0.5% levobupivacaine (Lbup, 0.5% bupivacaine (Bup and 2% lidocaine with epinephrine 1:80,000 (Lid + Epi for an inferior alveolar nerve block following lower third molar surgery. Methods. A total of 102 patients (ASA I were divided into three groups, each of which received either 3 mL of Lbup, Bup or Lid + Epi. The intensity of postoperative analgesia was measured using a verbal rating scale (VRS. The total amounts of rescue analgesics were recorded on the first and during seven postoperative days. Patients satisfaction was noted using a modified verbal scales. Results. A significantly higher level of postoperative pain was recorded in Lid + Epi group compared to Bup and Lbup groups. No significant differences were seen between Bup and Lbup, but a significant reduction in the need for rescue analgesics was seen postoperatively in both Lbup and Bup (50% in comparison with Lid + Epi (80% in the first 24 hours. The same significant trend in rescue analgesic consumption was recorded for seven postoperative days. Patients’ overall satisfaction was significantly lower for Lid + Epi (10% than for Lbup (56% and Bup (52%. Conclusion. The use of a new and long-acting local anaesthetic 0.5% levobupivacaine is clinically relevant and effective for an inferior alveolar nerve block and postoperative pain control after third molar surgery. In our study Lbup and Bup controled postoperative pain more efficiently after lower third molar surgery compared to Lid + Epi. [Projekat Ministarstva nauke Republike Srbije, br. 175021

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

    Grahame K. Goode

    2011-06-01

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

  10. Inferior glenohumeral joint dislocation with greater tuberosity avulsion

    Mohd Faizan; Latif Zafar Jilani; Mazhar Abbas; Yasir Salam Siddiqui; Aamir Bin Sabir; M.K.A.Sherwani; Saifullah Khalid

    2015-01-01

    Inferior glenohumeral dislocation is the least common type of glenohumeral dislocations.It may be associated with fractures of the adjacent bones and neurovascular compromise.It should be treated immediately by close reduction.The associated neuropraxia usually recovers with time.Traction-counter traction method is commonly used for reduction followed by immobilization of the shoulder for three weeks.Here,we report a case of inferior glenohumeral joint dislocation with greater tuberosity fracture with transient neurovascular compromise and present a brief review of the literature.

  11. Maksilektomi Inferior pada Karsinoma Sel Skuamosa Palatum Durum

    Sukri Rahman

    2016-01-01

    Full Text Available Abstrak          Karsinoma Palatum Durum adalah keganasan daerah kepala dan leher yang jarang terjadi dimana setengah diantaranya merupakan Karsinoma Sel Skuamosa. Pada fase awal keganasan ini dapat bersifat asimptomatis namun dapat juga menimbulkan gejala berupa ulkus yang terasa nyeri pada perkembangan penyakitnya. Operasi maksilektomi inferior merupakan salah satu pilihan tindakan yang dapat dilakukan dalam tatalaksana kasus ini, diikuti oleh pemberian radioterapi. Kasus ini dibuat untuk memahami penatalaksanaan karsinoma palatum durum. Dilaporkan kasus seorang laki-laki 45 tahun dengan diagnosis Karsinoma Sel Skuamosa Palatum Durum (Well to Moderately Differentiated Keratinized stadium IVa (T4aN0M0 dilakukan operasi maksilektomi inferior, namun tidak diikuti dengan radioterapi karena pasien menolak. Maksilektomi inferior merupakan pilihan pembedahan pada tumor yang terbatas pada palatum, lantai sinus maksila dan kavum nasi. Prognosis karsinoma sel skuamosa palatum durum cukup baik dan angka harapan hidup lima tahun akan bertambah bila dilakukan operasi diikuti dengan pemberian radioterapi. Kata kunci: Karsinoma sel skuamosa, maksilektomi inferior, radioterapi AbstractCarcinoma of the hard palate is a rare head and neck cancer in which half of it was Squamous Cell Carcinoma. In the initial phase of this malignancy may be asymptomatic, but can also cause symptoms such as painful ulcers in the development of the disease. Inferior maxillectomy is one of the choice of operation that can be performed, followed by radiotherapy to understand the management of carcinoma of the hard palate. Reported one case of a man 45 years old with diagnosis Squamous Cell Carcinoma of hard palate (Well to Moderately Differentiated Keratinized stage IVa (T4aN0M0 treated by inferior maxillectomy surgery, but not followed by radiotherapy because the patient refused. Inferior Maksilektomi is a surgical option in tumor that limited to the palate, floor of the

  12. Suprarenal symplastic leiomyoma of the inferior vena cava.

    Kepenekci, Ilknur; Demirkan, Arda; Sözener, Ulas; Cakmak, Atil; Demirer, Seher; Alaçayir, Iskender; Ekinci, Cemil

    2009-01-01

    We report on a case of a leiomyoma in the inferior vena cava that appeared in the image to be located in the adrenal gland. En bloc excision of the tumor with the right adrenal gland and the involved segment of the vena cava was carried out. Histopathological work-up of the tumor revealed smooth muscle fibers and marked nuclear pleomorphism consistent with symplastic leiomyoma. This case report presents a distinct histological variant of the rarely seen primary smooth muscle tumor of the inferior vena cava.

  13. Outcome of Subsequent Pregnancies in Familial Molar Pregnancy

    Masoumeh Fallahian

    2013-01-01

    Full Text Available Familial recurrent molar pregnancy is an exceedingly rare condition, in which completehydatidiform moles are mostly diploid but biparental in origin and the outcome of subsequentpregnancies is likely to be a hydatidiform mole or other type of reproductiveloss. We previously reported a case of familial molar pregnancy (family K comprisingfive affected members (four sisters and one of their cousins each with at least one hydatidiformmole (HM. In addition to the molar pregnancies, these patients have a total ofthree miscarriages and 8 normal pregnancies leading to healthy children; but the youngestmember of this family has given birth to a boy with Down syndrome.Our second family (case S includes two sisters with diploid biparental complete moles.They have a total of six molar pregnancies with no living child. Recently the younger sisterhad a partial molar pregnancy with apparently normal XX fetus accompanying diffusemolar changes of the placenta that led to preeclampsia and preterm delivery.Overall, these families have had 26 pregnancies including 12 molar pregnancies (completeor partial and three abortions.We concluded that these families are predisposed to various genetic mutations, chromosomalabnormalities and clinical manifestations, which affect their offspring. Furtherstudies of patients are needed to determine any relationship between a history of familialmolar pregnancy and trisomy or other chromosomal abnormalities in offspring and geneticmutations in the products of conception to complete the puzzle and manage familialmolar pregnancy.

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

    Ana Flávia Granville-Garcia

    2008-12-01

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

  15. Variation in Cuspal Morphology in Maxillary First Permanent Molar with Report of 3 Cusp Molar- A Prevalence Study

    2016-01-01

    Introduction Human teeth has always been known for morphological variations in both the crown and root structures. The corono-morphological variations can be in the form of extra cusp or missing cusp. Permanent maxillary first molars are the biggest teeth in maxillary arch and have a high anchorage value and are known for their four cusp and five cusp patterns, if present with cusp of Carebelli. Aim The aim of this study was to determine the prevalence of cuspal variations and quantification of cusps of permanent maxillary first molar in Malwa population. Materials and Methods A total of 1249 individuals were studied at Government College of Dentistry, Indore, Madhya Pradesh, India, to evaluate the number of cusps in permanent maxillary first molars. Results Of the studied 1249 individuals, permanent maxillary first molars had five cusps in 407 (32.6%) cases while 838 (67.08%) cases had four cusp and four (0.32%) cases had three cusps. The four cases having three cusp permanent maxillary first molars were present unilaterally and only in females. Conclusion This article emphasizes the presence of permanent maxillary first molar with only three cusps in the Malwa population of India. It also reviews the literature in respect to this rare anomaly and calls for continuous and close monitoring to report such cases in the future. PMID:27790576

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

    Kenny, Damien

    2012-02-01

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

  17. An unusual delayed complication of inferior alveolar nerve block.

    Smyth, Joanna; Marley, John

    2010-01-01

    Systemic and localised complications after administration of local anaesthetic for dental procedures are well recognised. We present two cases of patients with trismus and sensory deficit that arose during resolution of trismus as a delayed complication of inferior alveolar nerve block.

  18. Endodontic-related inferior alveolar nerve and mental foramen paresthesia.

    Morse, D R

    1997-10-01

    Paresthesia is a condition that involves perverted sensations of pain, touch, or temperature. It has a variety of possible causes. This article presents a literature review and case reports of endodontically related inferior alveolar nerve and mental foramen paresthesia. Nondrug prevention methods and the dental uses of dexamethasone are also discussed.

  19. INFERIOR VENA-CAVA OBSTRUCTION AFTER ORTHOTOPIC LIVER-TRANSPLANTATION

    BROUWERS, MAM; DEJONG, KP; PEETERS, PMJG; BIJLEVELD, CMA; KLOMPMAKER, IJ; SLOOFF, MJH

    1994-01-01

    Post-operative inferior vena cava (IVC) obstruction is reported as an uncommon complication after orthotopic liver transplantation (OLT). We report 6 cases after 245 OLT's in the period between March '79 and December '92. Compression or torsion of the IVC or a technical problem were underlying cause

  20. [Resection of leiomyosarcoma of the inferior vena cava].

    Zotov, S P; Pyshkin, S A; Malyshev, M Iu; Safuanov, A Kh; Borovikov, D A; Siniukov, D M; Tereshin, O S; Panov, I O

    2013-01-01

    Experience in treatment of leiomyosarcoma of the retrohepatic segment of the inferior vena cava at any separately taken clinic is scarce. Given a rare nature of the pathology involved, whose diagnosis and management require joint participation of various-specialty physicians, we have considered it wise to present our own clinical case report.

  1. INVOLVEMENT OF THE INFERIOR CAVAL VEIN IN ADRENAL METASTASIS

    VANDALEN, KC; VANDRIEL, MF; MENSINK, HJA

    1992-01-01

    A patient was referred to our hospital for resection of a large renal cell carcinoma with invasion of the inferior caval vein, diagnosed as such with CT, angiography and cavography. The history mentioned partial resection of the left lung for lung carcinoma 16 months before. At operation the tumor c

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

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

    2013-12-15

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

  3. Partial molar volumes and partial molar adiabatic compressibilities of a short chain perfluorosurfactant: Sodium heptafluorobutyrate in aqueous solutions at different temperatures

    Blanco, Elena [Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela (Spain); Ruso, Juan M. [Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela (Spain)]. E-mail: faruso@usc.es; Prieto, Gerardo [Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela (Spain); Sarmiento, Felix [Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela (Spain)

    2005-12-15

    Density and ultrasound measurements of sodium heptafluorobutyrate in aqueous solutions at T = (283.15, 288.15, 293.15, 298.15, 303.15, 308.15, 313.15, 318.15, and 323.15) K have been obtained. From these results partial molar volumes and isentropic partial molar adiabatic compressibilities were calculated. Deviations from the Debye-Hueckel limiting law provide evidence for limited association at lower concentrations. The change of the partial molar volume and isentropic partial molar adiabatic compressibility upon aggregation was calculated. Variations of the change of partial molar volumes and isentropic partial molar adiabatic compressibility upon aggregation are discussed in terms of temperature.

  4. Erupted complex odontoma delayed eruption of permanent molar.

    Ohtawa, Yumi; Ichinohe, Saori; Kimura, Eri; Hashimoto, Sadamitsu

    2013-01-01

    Odontomas, benign tumors that develop in the jaw, rarely erupt into the oral cavity. We report an erupted odontoma which delayed eruption of the first molar. The patient was a 10-year-old Japanese girl who came to our hospital due to delayed eruption of the right maxillary first molar. All the deciduous teeth had been shed. The second premolar on the right side had erupted, but not the first molar. Slight inflammation of the alveolar mucosa around the first molar had exposed a tooth-like, hard tissue. Panoramic radiography revealed a radiopaque mass indicating a lesion approximately 1 cm in diameter. The border of the image was clear, and part of the mass was situated close to the occlusal surface of the first molar. The root of the maxillary right first molar was only half-developed. A clinical diagnosis of odontoma was made. The odontoma was subsequently extracted, allowing the crown of the first molar to erupt almost 5 months later. The dental germ of the permanent tooth had been displaced by the odontoma. However, after the odontoma had been extracted, the permanent tooth was still able to erupt spontaneously, as eruptive force still remained. When the eruption of a tooth is significantly delayed, we believe that it is necessary to examine the area radiographically. If there is any radiographic evidence of a physical obstruction that might delay eruption, that obstruction should be removed before any problems can arise. Regular dental checkups at schools might improve our ability to detect evidence of delayed eruption earlier.

  5. Implicación de la erupción de los terceros molares en el apiñamiento anteroinferior severo

    J. Bustillo Arrieta

    2016-04-01

    Full Text Available Objetivo: Estimar el grado de asociación entre el apiñamiento anteroinferior y la presencia de terceros molares inferiores en modelos de estudio y radiografías panorámicas de pacientes atendidos en el Postgrado de Ortodoncia de la Facultad de Odontología de la Universidad de Cartagena y centros de atención odontológica y radiológica de la ciudad de Cartagena. Diseño del estudio: Estudio de corte transversal. Emplazamiento: Facultad de Odontología de la Universidad de Cartagena de Indias (Colombia y otros centros de atención odontológica de la ciudad. Participantes: 366 modelos de estudio y radiografías panorámicas de pacientes seleccionados por estrictos criterios de inclusión y exclusión. Mediciones principales: Se utilizó un instrumento que incluyó edad, sexo, presencia o ausencia de terceros molares, posición de terceros molares según la clasificación de Winter, estadio de formación de los terceros molares según la clasificación de Nolla; y magnitud de apiñamiento según la clasificación de Harfin. Los datos fueron analizados a partir de distribuciones de frecuencia y proporciones; se realizó análisis inferencial (prueba chi² utilizando el programa SPSS statistic v22 IBM y se efectuó análisis multivariante utilizando el análisis de correspondencias simple en el programa estadístico R. Resultados: La prevalencia de apiñamiento anteroinferior fue de 70,2%. Se presentó asociación estadísticamente significativa entre la magnitud de apiñamiento anteroinferior con el estadio de formación del tercer molar inferior izquierdo. Conclusiones: La prevalencia de apiñamiento anteroinferior en los sujetos fue alta; el estadio de formación del tercer molar es un factor determinante en la aparición de apiñamiento anteroinferior.

  6. A clinical trial of pulpotomy vs. root canal therapy of mature molars.

    Asgary, S; Eghbal, M J

    2010-10-01

    Root canal therapy (RCT) and tooth extraction are the main treatment options for irreversible pulpitis or its sequelae. Pulpotomy is an alternative treatment; however, more evidence is required. If outcomes of pulpotomy with a calcium-enriched mixture (PCEM) are non-inferior for mature molars with irreversible pulpitis compared with those from one-visit RCT (ORCT), this may be a beneficial treatment option. Four hundred seven individuals met the inclusion criteria and were randomly allocated [PCEM (n = 205), ORCT (n = 202)]. We used NRS questionnaires to record pain intensity. Six-month clinical and radiographic successes were assessed. Individuals in the ORCT arm reported significantly more post-operative pain than those in the PCEM arm (P < 0.001). Clinical success rates in the two arms showed no statistically significant difference; however, the radiographic success rates were significantly greater in the PCEM arm (P < 0.001). This trial suggests PCEM as an alternative for treatment of irreversible pulpitis. If long-term results confirm initial ones, PCEM may revolutionize oral health worldwide.

  7. Iatrogenic displacement of impacted third molar. Case report

    Konstantinos TSIKLAKIS

    2013-08-01

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

  8. Uterine rupture following incomplete molar pregnancy: a case report

    Pourali L

    2013-03-01

    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.

  9. Influence of the tooth section technique in alveolar nerve damage after surgery of impacted lower third molars.

    Genú, P R; Vasconcelos, B C E

    2008-10-01

    This study is a randomized control split-mouth non-blinded prospective trial, the aim of which was to evaluate clinically the frequency and type of injury to the inferior alveolar nerve (IAN) following mandibular third molar surgery using or not using the tooth section technique. The sample consisted of 50 lower third molars in 25 patients, in the control group the tooth section technique was not used, and it was used in the experimental group. The outcomes have shown a frequency of 8% of IAN injury for both groups (in both genders), and there were no statistically significant associations between the use of the tooth section technique and a diminished incidence of IAN injury or the presence of radiographic signs of a direct relationship between the tooth/nerve/mandibular canal and IAN injury. There was no association between deformities of the tip of dental needles and nerve injury. Temporary hypoesthesia and paresthesia were the commonest nerve injuries. All patients recovered from these injuries within six months.

  10. PEMANFAATAN BIJI KAKAO INFERIOR CAMPURAN SEBAGAI SUMBER ANTIOKSIDAN DAN ANTIBAKTERI

    Yulianto Tri Chandra Kusuma

    2013-11-01

    Full Text Available [ENGLISH] There are about 30% of cocoa beans still classified as inferior or low quality beans due to diseases. Low-quality cocoa beans can be used as the source of polyphenolic substances. The purpose of this study was to determine the potency of inferior cocoa beans with various particle sizes as raw materials for polyphenol extraction, and the use of polyphenol-rich cocoa extracts as antioxidant and antibacterial substances. The research was conducted in two stages, namely preliminary research and primary research. This preliminary study aimed to obtain polyphenol-rich cocoa bean extract and to examine antioxidant activity using DPPH method. The next research was to conduct antibacterial test against Escherichia coli and Bacillus subtilis using well diffusion method treated using polyphenols of each type of various particle size (16 mesh, 25 mesh, 35 mesh with concentrations of 0 ppm, 25.000 ppm, 50.000 ppm, 75.000 ppm, 100.000 ppm. The plates were incubated at 37°C for 24 hours and the inhibition power against bacteria was observed. The results showed that the greater the concentration of polyphenol extracts and the smaller size of the filter powder cocoa resulted in the increase of bacterial growth inhibition area. Keywords: Polyphenol; Cocoa beans; Escherichia coli; Bacillus subtilis [INDONESIAN] Biji kakao inferior merupakan biji buah kakao bermutu rendah karena terserang penyakit dan belum termanfaatkan secara maksimal. Biji kakao berkualitas rendah dapat dimanfaatkan dengan cara mengekstrak kandungan polifenolnya. Tujuan penelitian ini adalah mengetahui potensi ekstrak polifenol biji kakao inferior dengan variasi ukuran partikel sebagai bahan yang memiliki aktivitas antioksidan dan penghambat pertumbuhan bakteri. Penelitian ini dilakukan dalam dua tahap, yaitu penelitian pendahuluan dan penelitian utama. Penelitian pendahuluan bertujuan untuk memperoleh esktrak polifenol dari biji kakao inferior campuran yang terserang penyakit

  11. Necessity of 3D visualization for the removal of lower wisdom teeth: required sample size to prove non-inferiority of panoramic radiography compared to CBCT.

    Roeder, Felix; Wachtlin, Daniel; Schulze, Ralf

    2012-06-01

    The availability of cone beam computed tomography (CBCT) and the numbers of CBCT scans rise constantly, increasing the radiation burden to the patient. A growing discussion is noticeable if a CBCT scan prior to the surgical removal of wisdom teeth may be indicated. We aimed to confirm non-inferiority with respect to damage of the inferior alveolar nerve in patients diagnosed by panoramic radiography compared to CBCT in a prospective randomized controlled multicentre trial. Sample size (number of required third molar removals) was calculated for the study and control groups as 183,474 comparing temporary and 649,036 comparing permanent neurosensory disturbances of the inferior alveolar nerve. Modifying parameter values resulted in sample sizes ranging from 39,584 to 245,724 respectively 140,024 to 869,250. To conduct a clinical study to prove a potential benefit from CBCT scans prior to surgical removal of lower wisdom teeth with respect to the most important parameter, i.e., nerval damage, is almost impossible due to the very large sample sizes required. This fact vice versa indicates that CBCT scans should only be performed in high risk wisdom tooth removals.

  12. Pendulum Therapy of Molar Distalization in Mixed Dentition.

    Patil, Raju Umaji; Prakash, Amit; Agarwal, Anshu

    2016-01-01

    Early and timely pedo-orthodontic treatment is aimed at eliminating the disturbances of skeletal or dentoalveolar development, to harmonize the stomatognathic system before the full eruption of all permanent teeth. The advantages of pendulum appliance are its minimal dependence on patient's compliance (child cooperation), ease of fabrication, onetime activation and adjustment of the springs if necessary to correct minor transverse and vertical molar positions. This article reports a successful treatment method of class II malocclusion with pendulum appliance in mixed dentition phase. Distalization of maxillary molar was done, followed by guidance of canine impaction orthodontically and other dental correction using 0.022 MBT appliances. Posttreatment results were stable and remarkable. How to cite this article: Patil RU, Prakash A, Agarwal A. Pendulum Therapy of Molar Distalization in Mixed Dentition. Int J Clin Pediatr Dent 2016;9(1):67-73.

  13. First permanent molar root development arrest associated with compound odontoma.

    Gunda, Sachin A; Patil, Anil; Varekar, Aniruddha

    2013-07-04

    Trauma or infection to the primary tooth may have deleterious effects on the underlying developing tooth buds. Anatomically the root apices of primary teeth are in close proximity to the developing permanent tooth buds; hence spread of infection originating from pulp necrosis of primary tooth may not only affect the underlying tooth bud but may also affect the adjacent tooth buds. The extent of malformation depends on the developmental stage of tooth or the age of patient. Presented here is a rare case of complete arrest of maxillary first permanent molar root growth due to spread of periapical infection originating from second primary molar leading to failure of its eruption and finally extraction. Histopathlogical analysis revealed compound odontoma associated with maxillary first permanent molar.

  14. Microbiology of the pericoronal pouch in mandibular third molar pericoronitis.

    Leung, W K; Theilade, E; Comfort, M B; Lim, P L

    1993-10-01

    The microorganisms associated with mandibular third molar pericoronitis were investigated using direct microscopy and anaerobic culture method. The pericoronal pouch was sampled with paper points in A) 8 patients without mandibular third molar pericoronitis and B) 6 patients with mandibular third molar pericoronitis. Under the microscope, the microflora was found to be a complex mixture comprising gram-positive and gram-negative cocci, rods and filaments (including fusiform and curved rods), motile rods and spirochetes. Significantly higher proportions of motile, gram-negative rods were found in group B than in group A. The predominant cultivable microflora of 9 samples: A (4) and B (5) comprised several species of facultative and obligate anaerobic bacteria, namely Peptostreptococcus, Streptococcus, Actinomyces, Eubacterium, Propionibacterium, Veillonella, Porphyromonas, Prevotella, Bacteriodes, Fusobacterium, Campylobacter, Staphylococcus, Stomatococcus, Lactobacillus, Neisseria, Capnocytophaga, Haemophilus, Selenomonas and Centipeda species. The microflora in pericoronitis appeared similar to that of diseased periodontal pockets.

  15. Use of sevoflurane inhalation sedation for outpatient third molar surgery.

    Ganzberg, S; Weaver, J; Beck, F M; McCaffrey, G

    1999-01-01

    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 subjective satisfaction with the technique, physiological parameters, amnesia, and psychomotor recovery were also assessed. No statistically significant difference was found between the sevoflurane and midazolam-fentanyl-propofol sedative groups in physiological parameters, degree of amnesia, reported quality of sedation, or patient willingness to again undergo a similar deep sedation. A trend toward earlier recovery in the sevoflurane group was identified. Sevoflurane can be successfully employed as a deep sedative rather than a general anesthetic for extraction of third molars in healthy subjects.

  16. Molar tooth carbonates and benthic methane fluxes in Proterozoic oceans

    Shen, Bing; Dong, Lin; Xiao, Shuhai; Lang, Xianguo; Huang, Kangjun; Peng, Yongbo; Zhou, Chuanming; Ke, Shan; Liu, Pengju

    2016-01-01

    Molar tooth structures are ptygmatically folded and microspar-filled structures common in early- and mid-Proterozoic (~2,500-750 million years ago, Ma) subtidal successions, but extremely rare in rocks isotopes, we show that molar tooth structures may have formed within sediments where microbial sulphate reduction and methanogenesis converged. The convergence was driven by the abundant production of methyl sulphides (dimethyl sulphide and methanethiol) in euxinic or H2S-rich seawaters that were widespread in Proterozoic continental margins. In this convergence zone, methyl sulphides served as a non-competitive substrate supporting methane generation and methanethiol inhibited anaerobic oxidation of methane, resulting in the buildup of CH4, formation of degassing cracks in sediments and an increase in the benthic methane flux from sediments. Precipitation of crack-filling microspar was driven by methanogenesis-related alkalinity accumulation. Deep ocean ventilation and oxygenation around 750 Ma brought molar tooth structures to an end.

  17. Variation in buccal surface morphology of deciduous first molars

    M Simratvir

    2012-01-01

    Full Text Available Background: The buccal bulge of the deciduous first molars has always been a restorative challenge to the pediatric dentist. Morphologically it may vary from a slight prominence to a well-developed cusp-like structure. Aim: This study was conducted to determine the variable buccal surface morphology of deciduous first molar and its clinical relevance. Materials and Methods: A prospective study was conducted whereby 2016 patients visiting the outpatient clinic of dental hospital over 1 year were evaluated. Any variation in buccal surface morphology of the deciduous first molars was recorded photographically or by replicating in dental stone. Results: Varied morphological patterns on buccal surface were observed for which a new classification scheme has been proposed. Conclusion: The surface morphology of deciduous teeth crowns must be studied carefully as it may be indicative of pulpal extensions and accessory roots, requiring consideration during restorative treatment planning.

  18. Solution viscosity – molar mass relationships for poly(butylene succinate and discussion on molar mass analysis

    Q. Charlier

    2015-05-01

    Full Text Available Poly(butylene succinate (PBS is currently developing due to its biodegradability and the similarity of its mechanical properties to those of polyolefins. Relationships between the number average molar mass, Mn, and solution viscosity such as [η] and ηred were derived for this aliphatic polyester. Mn values were determined by end-group analysis and size exclusion chromatography (SEC. Mark-Houwink-Sakurada (MHS parameters were proposed in two solvents and for the different molar masses and viscosity measurement methods. As an example, the MHS equations were respectively, [η] =6.4•10–4•Mn0.67 in chloroform and [η] = 7.1•10–4•Mn0.69 in 50/50 wt% 1,2-dichlorobenzene/phenol at 25°C for molar masses measured by SEC in hexafluoro isopropanol (HFIP with poly(methyl methacrylate (PMMA standards. Empirical relationships were also suggested to derive Mn directly from reduced viscosity, ηred, which is much easier to determine than intrinsic viscosity. With these data, the number average molar mass of PBS can be conveniently estimated from a single viscosity measurement. In addition, it was shown that PBS contains 1–2 wt% of cyclic oligomers produced during esterification and that molar masses determined by taking this fraction into account or not were significantly different, especially for long chains.

  19. Sex assessment by molar odontometrics in North Indian population

    Ramandeep Singh Narang

    2015-01-01

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

  20. Fibrous epulis associated with impacted lower right third molar

    Ni Putu Mira Sumarta

    2009-12-01

    Full Text Available Background: Epulis or epulides are lesions associated with gingival tissues. Fibrous epulis is a type of hyperplastic fibrous tissue mass located at the gingival which is slow growing, painless, having same color as the oral mucosa and firm on palpation. Anterior regions of the oral cavity are the frequently affected sites as these areas are more prone to be affected by calculus deposition and poor plaque control due to frequent teeth malposition. Removal of any irritating factors and excision of the lesion are the usual treatments. Purpose: This case report presents a rare case of fibrous epulis which occurred in the posterior region of the oral cavity and associated with impacted lower third molar. Case: A case of fibrous epulis at the lower right third molar area of three months duration is presented. The mass was slow growing, painless and on examination it was a pedunculated mass overlying the unerupted lower right third molar, having same color with the oral mucosa and firm on palpation. Clinically, the lesion was diagnosed as fibrous epulis associated with impacted lower right third molar. Case management: The treatment were surgical excision of the epulis and removal of the lower right third molar. The histopathology result showed tissue with squamous epithelial lining, achanthotic fibrous connective tissue, mononuclear inflammatory cells and few capillaries without signs of malignancy. This is consistent with the diagnosis of fibrous epulis. Conclusion: Fibrous epulis, although frequently occurred at the anterior region of the oral cavity, may rarely grow at the area of lower third molar. This phenomenon supports the theory that epulis can grow on any surface of oral mucous membrane as long as local irritants are present.

  1. Frequency of third molar agenesis: relation to jaw size

    2014-01-01

    Introducción: este artículo forma parte de la investigación “Agenesia de terceros molares en los pacientes de las clínicas del Posgrado de Ortodoncia de la Universidad Antonio Nariño, 2011”, del grupo “Investigación en Salud Oral”. Algunos autores consideran que la agenesia de terceros molares puede ser una evidencia de tendencias evolutivas, en la que se observa una disminución en el tamaño de los maxilares y el número de dientes; sin embargo, en algunos estudios esto ha sido cuestionado. El...

  2. Treatment of Ectopic Mandibular Second Permanent Molar with Elastic Separators

    R. Rajesh

    2014-01-01

    Full Text Available Ectopic eruption is a developmental disturbance in which the tooth fails to follow its normal eruption pathway. Ectopic eruption of the second molar is relatively rare. This paper presents the case of thirteen-year-old male with an ectopic mandibular second permanent molar. The condition was corrected with surgical exposure and placement of elastic separators. This case report lays emphasis on the practice of basic methods to obtain acceptable results rather than extensive surgical or orthodontic corrections. It is advised that ectopic teeth should not be neglected especially when it concerns developing caries and malocclusion.

  3. Predictors of inferior outcome in community acquired bacterial meningitis.

    Streharova, A; Krcmery, V; Kisac, P; Kalavsky, E; Holeckova, K; Lesnakova, A; Luzinsky, L; Adamkovicova, E; Pavlikova, Z; Spilakova, N; Kacunova, B; Dovalova, V; Wiczmandyova, O; Spanik, S; Liskova, A; Chovancova, D; Kovac, M; Ondrusova, A; Bauer, F; Benca, J; Rudinsky, B; Sramka, M; Kralova, J; Krsakova, J; Krumpolcova, M; Findova, L; Svabova, V; Sladeckova, V; Seckova, S; Saniova, J; Pavlicova, B; Taziarova, M; Bukovinova, P; Kolenova, A; Horvathova, E; Hvizdak, F; Luzica, R; Rolnikova, B; Bocakova, A; Grey, E; Bielova, M; Huttova, M; Sabo, I; Jalili, N

    2007-11-01

    The aim of this study was to assess mortality and sequellae within cases from Nationwide survey of community acquired meningitis and identify risk factors for inferior outcome. Risk factors such as underlying disease (diabetes mellitus, cancer, trauma, neonatal age, splenectomy, alcoholism, sepsis, other infections), etiology, clinical symptoms and outcome (death, improvement and cured after modifications of ATB therapy, cured without change of therapy, cured with neurologic sequellae) were recorded and analysed with univariate analysis (chi2 or t test for trends, CDC Atlanta 2004). Analysing risk factors for inferior outcome (death or cured with neurologic sequellae), we compared patients who died or survived with neurologic sequellae to all patients with community acquired bacterial meningitis. Univariate analysis showed that trauma (palcohol abuse (pdiabetes, S. aureus (pdiabetes mellitus (palcoholism (palcohol abuse (p<0.05), craniocerbral trauma (p<0.05) and less common in meningitis with pneumococcal etiology (p<0.05).

  4. Right Ventricular Involvement in either Anterior or Inferior Myocardial Infarction

    Firoozeh Abtahi

    2016-06-01

    Full Text Available Background: Unlike left ventricular function, less attention has been paid to Right Ventricular (RV function after Myocardial Infarction (MI. Objectives: The current study aimed to compare RV function in patients with inferior and anterior MI. Patients and Methods: During the study period, 60 patients consecutively presented to the Emergency Department with chest pain were divided into two groups based on their electrocardiographic findings. Accordingly, 25 patients had inferior MI (IMI group and 35 ones had anterior MI (AMI group. Echocardiography was performed 48 hours after starting the standard therapy. Conventional echocardiographic parameters and Tissue Doppler Imaging (TDI measurements were acquired from the standard views. Student t-test and the chi-square test were respectively used for comparisons of the normally distributed continuous and categorical variables in the two groups. Besides, P < 0.05 was considered to be statistically significant.

  5. Electronic thermography for the assessment of inferior alveolar nerve deficit.

    Gratt, B M; Shetty, V; Saiar, M; Sickles, E A

    1995-08-01

    Neurosensory deficit is one of the major complications encountered in oral and maxillofacial surgery. OBJECTIVES. To determine the efficacy of electronic thermography in objectively assessing neurosensory deficits of the inferior alveolar nerve. STUDY DESIGN. Three studies were conducted measuring skin temperature over the chin region of the face at 0.1 degree C accuracy. RESULTS. (1) Thermal symmetry of the chin region in normal subjects (delta T = 0.2 degree C, SD = 0.02 degree C); (2) Induction of transient thermal asymmetry by local anesthetic injection (delta T = +0.4 degree C, SD = 0.2 degree C); (3) nine subjects with neurologic alterations of the inferior alveolar nerve (delta T = +0.5 degree C, SD = 0.2 degree C). Statistically significant differences were found between control group and experimental groups at p alveolar nerve injury or by pharmacologic nerve block.

  6. Inferior turbinate osteoma as a cause of unilateral nose obstruction.

    Grabovac, Stjepan; Hadzibegović, Ana Danić; Markesić, Josip

    2012-11-01

    Osteomas are benign, slow growing bone tumors often seen in paranasal sinuses, mostly in the frontal sinus, whereas they are rare in the nasal cavity. Inferior turbinate osteoma is extremely rare and our case is the third reported in the literature to date. Symptoms vary depending on the location, size and spreading and nasal obstruction is the most common symptom. Treatment of osteomas is surgical and is reserved only for rapidly growing osteomas with symptoms of infection or compression. Although endoscopic surgery is preferred modality, external approach with lateral rhinotomy should be considered with larger osteomas especially those that involve the ethmoid labyrinth. In cases like ours, when large osteoma is localized on the inferior nasal turbinate, sublabial incision through the vestibulum is very suitable approach because it provides wide access and good visibility and leaves no visible scar.

  7. Las alteraciones posturales en miembros inferiores en el surf

    2015-01-01

    Cuando el equilibrio neuromuscular no es óptimo durante la práctica de un deporte, es posible que, a largo plazo, aparezcan trastornos posturales que, dependiendo del tiempo de entrenamiento, pueden convertirse en un obstáculo para la salud. Es por esto, que mediante esta investigación he pretendido mostrar las alteraciones posturales que el surf puede llegar a provocar en quienes lo practican. Objetivo: Analizar las alteraciones posturales en los miembros inferiores de surfist...

  8. Truncal ataxia from infarction involving the inferior olivary nucleus.

    Park, Jae Hyun; Ryoo, Sookyung; Moon, So Young; Seo, Sand Won; Na, Duk L

    2012-08-01

    Truncal ataxia in medullary infarction may be caused by involvement of the lateral part of the medulla; however, truncal ataxia in infarction involving the inferior olivary nucleus (ION) has received comparatively little attention. We report a patient with truncal ataxia due to medial medullary infarction located in the ION. A lesion in the ION could produce a contralateral truncal ataxia due to increased inhibitory input to the contralesional vestibular nucleus from the contralesional flocculus.

  9. Bruxism elicited by inferior alveolar nerve injury: a case report.

    Melis, Marcello; Coiana, Carlo; Secci, Simona

    2012-02-01

    The aim of this case report is to describe the history of a patient who received an injury to the right inferior alveolar nerve after placement of a dental implant, with bruxism noted afterward. The symptoms were managed by the use of an occlusal appliance worn at night and occasionally during the day, associated with increased awareness of parafunction during the day to reduce muscle pain and fatigue. Paresthesia of the teeth, gingiva, and lower lip persisted but were reduced during appliance use.

  10. [Surgical treatment of leiomyosarcoma of the inferior vena cava].

    Zotov, S P; Panov, I O; Tereshin, O S; Vazhenin, A V

    2012-01-01

    The presented review of the literature is generalization of the currently existing data of foreign and Russian literature concerning treatment of a rare non-organic retroperitoneal tumour from smooth-muscle tissue, i. e., leiomyosarcoma of the inferior vena cava. The authors also formulate and lay down the basic principles of surgical interventions depending on the scope and level of the lesion, as well statistical analysis of the outcomes of surgical management of the this severely ill patient cohort.

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

    Keeling, A N

    2008-08-01

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

  12. [Aneurysm of the anterior inferior cerebellar artery: case report].

    Adorno, Juan Oscar Alarcón; de Andrade, Guilherme Cabral

    2002-12-01

    The intracranial aneurysms of the posterior circulation have been reported between 5 and 10% of all cerebral aneurysms and the aneurysms of the anterior inferior cerebellar artery (AICA) are considered rare, can cause cerebello pontine angle (CPA) syndrome with or without subarachnoid hemorrhage. Since 1948 few cases were described in the literature. We report on a 33 year-old female patient with subarachnoid hemorrhage due to sacular aneurysm of the left AICA. She was submitted to clipage of the aneurysm without complications.

  13. Distal posterior inferior cerebellar artery aneurysm in a child

    J. Francisco Salomão

    1992-06-01

    Full Text Available The case of a 7-year-old boy presenting with recurrent episodes of subarachnoid hemorrhage due to a distal posterior inferior cerebellar artery aneurysm (PICA, successfully operated, is reported.' The low incidence of intracranial aneurysms in the first decade of life and the rare occurrence of distal PICA aneurysms are unusual features of this case. The theories regarding the origin of intracranial berry aneurysms are discussed.

  14. Thermographic assessment of reversible inferior alveolar nerve deficit.

    Shetty, V; Gratt, B M; Flack, V

    1994-01-01

    The purpose of this study was to investigate thermography's potential as a diagnostic alternative for evaluating neurosensory deficits of the inferior alveolar nerve. Electronic thermography was used to evaluate the alterations in facial thermal patterns attendant to a conduction defect of the inferior alveolar nerve induced in 12 subjects using 2% lidocaine. The rates of onset and duration of sensory block, as visualized by thermography, were related to the results of conventional neurosensory testing. Comparison of the rate of response change within each measurement system revealed that changes in facial skin temperature manifest the induced deficit earlier than discriminative tests. Also, the prolonged elevation of thermal asymmetry suggested that electronic thermography has the ability to detect subtle changes in nerve function that are not discernible by physical neurosensory tests relying on patient response. Although cutaneous temperature increases were highest in the field of observation near the sensory distribution of the mental nerve, an inexplicable warming of the contralateral side of the face and neck was also observed. These attendant findings emphasize the need for further studies on the pathophysiologic mechanisms of facial thermal changes to better understand thermography's diagnostic accuracy and clinical utility for monitoring inferior alveolar nerve dysfunction.

  15. Inferior vestibular neuritis in a fighter pilot: a case report.

    Xie, Su Jiang; Jia, Hong Bo; Xu, Po; Zheng, Ying Juan

    2013-06-01

    Spatial disorientation in airplane pilots is a leading factor in many fatal flying accidents. Spatial orientation is the product of integrative inputs from the proprioceptive, vestibular, and visual systems. One condition that can lead to sudden pilot incapacitation in flight is vestibular neuritis. Vestibular neuritis is commonly diagnosed by a finding of unilateral vestibular failure, such as a loss of caloric response. However, because caloric response testing reflects the function of only the superior part of the vestibular nerve, it cannot detect cases of neuritis in only the inferior part of the nerve. We describe the case of a Chinese naval command fighter pilot who exhibited symptoms suggestive of vestibular neuritis but whose caloric response test results were normal. Further testing showed a unilateral loss of vestibular evoked myogenic potentials (VEMPs). We believe that this pilot had pure inferior nerve vestibular neuritis. VEMP testing plays a major role in the diagnosis of inferior nerve vestibular neuritis in pilots. We also discuss this issue in terms of aeromedical concerns.

  16. [Inferior vertical nystagmus: is magnetic resonance imaging mandatory?].

    Esteban-Sánchez, Jonathan; Rueda-Marcos, Almudena; Sanz-Fernández, Ricardo; Martín-Sanz, Eduardo

    2016-02-01

    Introduccion. La aparicion de un nistagmo vertical inferior clasicamente obliga a descartar una patologia vascular o de la union craneocervical mediante resonancia magnetica (RM). Estudios recientes demuestran una baja rentabilidad de esta prueba, ya que sugieren que este signo oculomotor puede tener una causa vestibular periferica, sobre todo cuando el paciente presenta un vertigo posicional paroxistico benigno (VPPB) del canal semicircular superior. Objetivo. Comprobar la rentabilidad de la RM en una poblacion de pacientes con nistagmo de posicion vertical inferior. Pacientes y metodos. Estudio retrospectivo de 42 pacientes consecutivos a los que se les realizo una historia clinica, exploracion fisica, y pruebas vestibulares caloricas y rotatorias. A todos ellos se les practico una RM craneal y cervical. Resultados. El 52% de los pacientes con nistagmo de posicion vertical inferior presentaba una clinica y exploracion fisica compatibles con VPPB del canal semicircular superior. La RM fue normal en un 67%, un 26% mostraba datos de espondilopatia y un 5% de microangiopatia cerebral no relacionados con la clinica del paciente. La prevalencia de malformacion de Arnold-Chiari de tipo I fue de un 9% en la poblacion estudiada, sin que nadie tuviera un antecedente reciente de VPPB. Los resultados obtenidos en las pruebas complementarias vestibulares no aportaron informacion adicional para llegar a un diagnostico etiologico. Conclusion. En los pacientes con un VPPB, la RM craneal y las pruebas vestibulares tienen una baja rentabilidad diagnostica, y se debe evaluar la necesidad real de esta prueba con el contexto clinico.

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

    M. Urdaneta Quintero

    2009-12-01

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

  18. Cicatrización periodontal del segundo molar mandibular tras la exodoncia del tercer molar mandibular incluido

    Inocêncio Teixeira de Faria, Ana Cristina

    2015-01-01

    La extracción quirúrgica del tercer molar (M3) puede provocar complicaciones periodontales en la cara distal del segundo molar (M2) adyacente. Se realizó un estudio clínico prospectivo a 12 meses en 25 pacientes jóvenes sanos (edad media 21 años) sometidos a 40 extracciones quirúrgicas de M3 mandibulares incluidos con elevado riesgo periodontal, con objeto de estudiar la cicatrización periodontal espontánea en la cara distal del M2. Prequirúrgicamente y a 3, 6 y 12 meses tras l...

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

    Gintaras Juodzbalys; Hom-Lay Wang; Gintautas Sabalys

    2011-01-01

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

  20. Local vs general anaesthesia in the development of neurosensory disturbances after mandibular third molars extraction: A retrospective study of 534 cases

    Biasotto, Matteo; Maglione, Michele; Di Lenarda, Roberto

    2016-01-01

    Background The choice of the anaesthetic modality is one of the primary steps during planning of third molar surgery. The aim of the present study was to compare the risk of developing neurological injures of the inferior alveolar nerve (IAN) and lingual nerve (LN) in patients treated for wisdom teeth removal under general anaesthesia (GA) with a group treated under local anaesthesia (LA). Material and Methods This is an observational retrospective, unicentric study; between September 2013 and September 2014, 534 patients underwent third molar surgery, 194 (36,3%) under GA and 340 (63,7%) under LA by the same oral surgeon. Differences in the incidence of IAN and LN injures between groups have been statistically analyzed with Fisher exact test and estimated odd ratio for development of such complications has been calculated. Results In GA patients the incidence of IAN and LN injures was 4.6% and 2.1%, respectively while in the LA group it was and 0.3% and 0%, respectively. A significant difference in IAN and LN involvement between groups was observed (IAN lesion: Fisher exact test, p<0.001; LN lesions: Fisher exact test, p<0.05). The estimated odd ratio for development of IAN injures after GA was 16.49 (95% CI: 2.07-131.19) and was not calculable for LN injures because no cases were observed in the LA group. Conclusions Since GA is a perioperative variable that seems to significantly increase the risk of developing IAN and LN lesions, when treating patients that request GA, they must be adequately informed that an higher incidence of post-surgical sensory disturbances is expected. Key words:Third molars, general anaesthesia, local anaesthesia, inferior alveolar nerve, lingual nerve. PMID:27694783

  1. Molar Intubation for Intra Oral Swellings:Our Experience

    Meenoti Potdar

    2008-01-01

    Full Text Available Molar intubation is a technique of laryngoscopy that can be used for anticipated difficult intubation in cases where standard laryngoscopy technique is difficult due to presence of any intraoral mass that anatomically hampers laryngoscopy or that bleeds on touch. This technique is very easy, reliable and rewarding but should be practiced on normal patients for easy application in actual difficult cases.

  2. Coronectomy may be a way of managing impacted third molars

    Ghaeminia, H.

    2013-01-01

    Data sourcesTPubMed, Embase, Web of Science, Cochrane Central Register of Controlled Trials (CENTRAL) and the grey literature database SIGLE.Study selectionRandomised controlled trials (RCTs) and non-randomised controlled trials (CCTs) that compared coronectomy with total removal for third molar ext

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

    Raquel Gonçalves Vieira-Andrade

    2012-08-01

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

  4. Lower molar and incisor displacement associated with mandibular remodeling.

    Baumrind, S; Bravo, L A; Ben-Bassat, Y; Curry, S; Korn, E L

    1997-01-01

    The purpose of this study was to quantify the amount of alveolar modeling at the apices of the mandibular incisor and first molar specifically associated with appositional and resorptive changes on the lower border of the mandible during growth and treatment. Cephalometric data from superimpositions on anterior cranial base, mandibular implants of the Björk type, and anatomical "best fit" of mandibular border structures were integrated using a recently developed strategy, which is described. Data were available at annual intervals between 8.5 and 15.5 years for a previously described sample of approximately 30 children with implants. The average magnitudes of the changes at the root apices of the mandibular first molar and central incisor associated with modeling/remodeling of the mandibular border and symphysis were unexpectedly small. At the molar apex, mean values approximated zero in both anteroposterior and vertical directions. At the incisor apex, mean values approximated zero in the anteroposterior direction and averaged less than 0.15 mm/year in the vertical direction. Standard deviations were roughly equal for the molar and the incisor in both the anteroposterior and vertical directions. Dental displacement associated with surface modeling plays a smaller role in final tooth position in the mandible than in the maxilla. It may also be reasonably inferred that anatomical best-fit superimpositions made in the absence of implants give a more complete picture of hard tissue turnover in the mandible than they do in the maxilla.

  5. Unilateral maxillary molar distalization with zygoma-gear appliance.

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

    2012-08-01

    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.

  6. SECONDARY RETENTION OF PERMANENT MOLARS - A REPORT OF 5 FAMILIES

    RAGHOEBAR, GM; TENKATE, LP; HAZENBERG, CAM; BOERING, G; VISSINK, A

    1992-01-01

    The aetiopathogenesis of secondary retention is not fully understood, but heredity is involved in at least some cases. In this study first-degree relatives of 52 patients with secondary retention of permanent molars were screened for the presence of the same phenomenon in their dentition. Familial o

  7. Antibiotic prophylaxis in third molar surgery: a review

    Oomens, M.A.E.; Forouzanfar, T.

    2012-01-01

    Objective Controversy exists about the efficacy of antibiotic prophylaxis in preventing complications after lower third molar surgery. For evidence-based recommendation, a review was performed on clinical trials reporting the use of antibiotic prophylaxis compared with no treatment or placebo with "

  8. Non-compliance Appliances for Upper Molar Distalization: An Overview.

    Noorollahian, Saeed; Alavi, Shiva; Shirban, Farinaz

    2015-01-01

    Tooth Size Arch-length Discrepancy (TSALD) is a common problem in orthodontics. Its clinical signs are tooth crowding, impaction and incisor proclination. The treatment options are dental arch expansion or tooth mass reduction (stripping or extraction). The "extraction versus non-extraction" controversy has been widely debated in the orthodontic literature. Distalization is a kind of arch expansion in anetro-posterior dimension. Several studies have evaluated both the therapeutic effectiveness and the side effects of the appliances for this method of space gaining. In some cases molar distalization is preferred, e.g., a patient with acceptable profile and skeletal pattern and half cusp Class II molar malocclusion or even less. In some cases molar distalization is the only way, e.g., the patient with previous upper premolar extraction and excessive overijet, or a skeletal Class III patient with previous upper premolar extraction needed upper anterior teeth retraction to create reverse overjet aspre surgical orthodontic decompensation. In this review article, we described non-compliance upper molar distalizing appliances.

  9. The chronology of third molar mineralization by digital orthopantomography.

    Maled, Venkatesh; Vishwanath, S B

    2016-10-01

    The present study was designed to determine the chronology of third molar mineralization to establish Indian reference data and to observe the advantages of digital orthopantomography. Therefore, a cross-sectional study was undertaken by evaluating 167 digital orthopantomographs in order to assess the mineralization status of the mandibular third molar of Caucasian individuals (85 males and 82 females) between the age of 14 and 24. The evaluation was carried out using the 8-stage developmental scheme of Demirjian et al (1973). The range, mean age, standard deviation and Student t-test are presented for each stage of mineralization in all four quadrants. Statistically significant differences between males and females were not found for all four third molars. All the individuals in this study with mature third molar were at least 18 years of age. For medicolegal purposes, the likelihood of whether an Indian is older than 18 years or not was determined. The advantage of digital orthopantomography in the interpretation of the tooth mineralization over the traditional method was acknowledged.

  10. Factors associated with molar incisor hypomineralization in Thai children.

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

    2014-08-01

    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.

  11. Molar incisor hypomineralization: review and recommendations for clinical management.

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

    2006-01-01

    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.

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

    Luiz Alberto Plácido PENNA

    2000-06-01

    Full Text Available As alterações morfológicas pulpares, decorrentes de um estímulo externo experimental (interferência oclusal, foram estudadas, em nível de microscopia de luz. Utilizaram-se restaurações de amálgama, em sobreoclusão nos primeiros molares superiores direitos de dez ratos Wistar, divididos em 3 grupos e sacrificados por perfusão transcardíaca com formol a 10%, aos 10, 20 e 30 dias. A avaliação foi feita nos molares inferiores direitos (lado experimental e esquerdos (lado controle. As peças ósseas após descalcificação em solução de EDTA associada às microondas, seguiram técnica histológica de rotina e coloração por hematoxilina-eosina e tricrômico de Mallory. Verificou-se no lado controle uma reação intensa caracterizada por um posicionamento atípico dos odontoblastos, seguida pelo aparecimento de cálculos pulpares e posteriormente por uma aparente e uniforme acomodação tecidual em toda a polpa, com moderada incidência de fibras colágenas. No lado experimental, as alterações foram similares parecendo, porém, aumentar com o tempo, principalmente aos 30 dias, onde a imagem histológica era semelhante à do lado controle aos 10 dias. Os resultados obtidos permitiram concluir que a interferência oclusal provocou alterações no tecido conjuntivo pulpar tanto no lado experimental como no controle e que as mesmas foram proporcionais à direção dos movimentos mandibulares.Pulpal morphological alterations in mandibular molars of rats, resulting from an experimental external stimulus (occlusal interference, were studied using light microscopy. We placed amalgam restorations in supraocclusion in the right superior first molars of 10 Wistar rats divided into three groups, which were sacrificed by transcardiac perfusion with 10% formalin, after 10, 20 and 30 days. The evaluation of the right (experimental side and left (control side inferior molars was made after decalcification of the bony specimens with EDTA solution

  13. Evaluación de la anatomía interna del primer molar mandibular mediante distintas tércnicas. Análisis descriptivo y repercusiones clínicas. Valoración de la utilidad y capacidad diagnóstica de nuevas tecnologías

    Valencia de Pablo, Óliver

    2012-01-01

    [ES] Esta tesis pretende estudiar la morfología del sistema de conductos en las raíces del primer molar permanente inferior, con el fin de valorar las complejidades morfológicas del interior radicular y trasladar los datos al terreno clínico para facilitar y mejorar su tratamiento, incrementando el porcentaje de éxito y el pronóstico del mismo. [EN] This thesis intends to study the morphology of the duct system in the roots of the first permanent molar in order to evaluate the morphologica...

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

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

    2013-01-01

    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.

  15. Odontometric analysis of permanent maxillary first molar in gender determination

    Shireen, Ayesha; Ara, Syeda Arshiya

    2016-01-01

    Aims: This study was conducted to assess the sex determination potential from mesiodistal (MD) and buccolingual (BL) dimensions of permanent maxillary first molar. Subjects and Methods: The study was conducted in the Department of Oral Medicine and Radiology, Al-Badar Rural Dental College and Hospital, Gulbarga, Karnataka, on 600 subjects (300 male and 300 female), aged 17–25 years. The subjects were selected based on the inclusion and exclusion criteria set forth for the study. After obtaining informed consent, the intraoral measurements of MD and BL dimensions on casts of the first maxillary molars were taken using digital vernier caliper with resolution of 0.01 mm. Statistical Analysis Used: The data obtained were subjected to statistical analysis using paired and unpaired t-test to compare MD and BL dimensions between males and females. P ≤0.05 was considered statistically significant. Results: The mean MD width of the first maxillary molar was 10.60 ± 0.6644 mm (right) and 10.60 ± 0.6644 mm (left) in males and 10.40 ± 0.6255 mm (right) and 10.40 ± 0.6255 mm (left) in females. The mean BL width of the first maxillary molar was 11.60 ± 1.2227 mm (right) and 11.60 ± 1.2227 mm (left) in males and 11.20 ± 0.8440 mm (right) and 11.20 ± 0.8440 mm (left) in females. The differences between males and females in MD and BL dimensions measured were statistically significant (P < 0.05). Right and left MD dimensions exhibited sexual dimorphism of 1.92% and right and left BL dimensions exhibited sexual dimorphism of 3.57%. Conclusions: The MD and BL dimensions of the maxillary first molars may be used as an aid in sex discrimination. PMID:28123268

  16. Odontometric analysis of permanent maxillary first molar in gender determination

    Ayesha Shireen

    2016-01-01

    Full Text Available Aims: This study was conducted to assess the sex determination potential from mesiodistal (MD and buccolingual (BL dimensions of permanent maxillary first molar. Subjects and Methods: The study was conducted in the Department of Oral Medicine and Radiology, Al-Badar Rural Dental College and Hospital, Gulbarga, Karnataka, on 600 subjects (300 male and 300 female, aged 17–25 years. The subjects were selected based on the inclusion and exclusion criteria set forth for the study. After obtaining informed consent, the intraoral measurements of MD and BL dimensions on casts of the first maxillary molars were taken using digital vernier caliper with resolution of 0.01 mm. Statistical Analysis Used: The data obtained were subjected to statistical analysis using paired and unpaired t-test to compare MD and BL dimensions between males and females. P ≤0.05 was considered statistically significant. Results: The mean MD width of the first maxillary molar was 10.60 ± 0.6644 mm (right and 10.60 ± 0.6644 mm (left in males and 10.40 ± 0.6255 mm (right and 10.40 ± 0.6255 mm (left in females. The mean BL width of the first maxillary molar was 11.60 ± 1.2227 mm (right and 11.60 ± 1.2227 mm (left in males and 11.20 ± 0.8440 mm (right and 11.20 ± 0.8440 mm (left in females. The differences between males and females in MD and BL dimensions measured were statistically significant (P < 0.05. Right and left MD dimensions exhibited sexual dimorphism of 1.92% and right and left BL dimensions exhibited sexual dimorphism of 3.57%. Conclusions: The MD and BL dimensions of the maxillary first molars may be used as an aid in sex discrimination.

  17. Distribution and characteristics of molar-incisor hypomineralization

    Janković Svjetlana

    2014-01-01

    Full Text Available Background/Aim. Developmental disorders of teeth are the problems that are becoming more present in pediatric dentistry, especially on first permanent molars and incisors. Molar Incisor Hypomineralization (MIH is proposed term for this phenomenon. The aim of this study was to establish the MIH prevalence in children living in the Foča municipality (Bosnia and Herzegovina as well as to assess characteristics and expression of hypomineralization within the tested population. Methods. A total of 141 children from the Foča municipality, 8 years of age, were included in this study. Criteria according to Weerhejm have been used for diagnosis of hypomineralization: demarcated opacity (DO, post-eruptive breakdown (PEB, atypical restoration (AR, extracted molars due to MIH (E-MIH and unerupted tooth (UT. Level and the prominence of color changes have been determined for patients with DO, PEB and AR. Results. MIH in this area was present in 12.8% of children. The prevalence of MIH changes expressed in percentages was as follows: DO was at 9.2%, PEB in 3.5%, AR in 5.6%, while E-MIH was 5.6%. A total of 9.9% of the examinees had mild, 5.6% moderate, and 7.8% severe form of MIH. White form of MIH defects was found in 9.9% of the examinees, white-yellow one in 5.6% and yellow-brown color in 3.5% of the examined children. These changes were more often present in the lower jaw (60.3%. In total, 6.4% of children had these changes present only on molars, while 6.4% of them both on molars and incisors simultaneously. Conclusion. A total of 12.8% of the examinees with MIH is not to be disregarded. With timely diagnosis, prevention and therapy complications could be avoided or mitigated.

  18. Association between enamel hypoplasia and dental caries in primary second molars and permanent first molars: A 3-year follow-up study

    Sakeenabi Basha

    2016-01-01

    Full Text Available Context: Enamel hypoplasia is a defect caused by disturbances during enamel formation. These defects in the enamel present important clinical significance as they predispose a tooth to dental caries. Aim: The aim of this study was to assess the longitudinal relationships between enamel hypoplasia and caries experience of primary second molars and permanent first molars. Materials and Methods: The study sample consisted of 765 subjects who underwent dental examinations at both ages 6 and 9 by the calibrated examiner. Primary second molars and permanent first molars were scored for the presence of enamel hypoplasia for each participant. Caries presence and number of decayed and filled surfaces (dfs and DFS were determined at ages 6 and 9. The relationships between enamel hypoplasia and caries experience were assessed using multivariable regression models. Results: At the tooth level, 2.8% and 3.5% of children had hypoplasia on primary second molars and permanent first molars respectively. Multivariable logistic regression analyses showed that children with enamel hypoplasia were at a significantly higher risk of caries at both ages 6 (odds ratio, OR = 5.27 for primary second molars and OR = 3.21 for permanent first molars and age 9 (OR = 3.45 for primary second molars and OR = 4.57 for permanent first molars, and that a statistically significant association was seen with caries incidence (OR = 2.08 for primary second molars and OR = 2.87 for permanent first molars. Conclusion: Enamel hypoplasia appears to be a significant risk factor for caries in both primary second molars and permanent first molars and should be considered in caries risk assessment.

  19. Hemianopsia altitudinal inferior por aracnoidite optoquiasmática

    R. Melaragno Filho

    1949-09-01

    Full Text Available Os autores relatam o caso de um paciente de 48 anos de idade, queixando-se de falta de visão nas metades inferiores dos campos visuais, há aproximadamente um ano. A doença evoluiu progressivamente após sinusotomia maxilar e frontal. Os diversos exames complementares realizados nada revelaram de anormal. Reação de Wassermann sempre negativa no sangue. Ao exame oftalmoscópico ficou patenteado, em AO, franca atrofia, no setor superior das papilas e edema pronunciado em suas metades inferiores. O exame campimétrico revelou nítida hemianopsia altitudinal inferior. As demais funções neurológicas e o exame clínico geral nada mais demonstraram de anormal. A iodoventriculografia evidenciou sinais radiológicos de aracnoidite optoquiasmática. À intervenção cirúrgica, foi verificada a existência de aracnoidite intensa na região quiasmática, com compressão dos nervos ópticos e do próprio quiasma. Após a intervenção cirúrgica, exames oftalmoscópicos sucessivos demonstraram melhora franca da acuidade visual em AO e discreto aumento dos campos visuais. Finalizando, os AA. tecem considerações sôbre as prováveis causas etiológicas dêsse tipo de reação meníngea.

  20. [The relation of pericoronitis to the position of the mandibular third molar].

    Lee, D K; Kim, B J

    1989-02-01

    Pericoronitis is the most commonly encountered pathologic condition involving the mandibular third molar. Because of the dangers associated with mandibular third molar pericoronitis, prophylactic extraction of third molar at high risk has been recommended. We studied 411 patients with mandibular third molar pericoronitis by clinical symptoms and radiographic measurement of mandibular third molar height, wideth and angulation. The results were as follows: 1. Mandibular third molar pericoronitis is frequently seen in third decade and there are no sexual difference significantely. 2. In inflammatory type of mandibular third molar pericoronitis, chronic pericoronitis occured more frequently than acute type. 3. In relation to angulation and height, mandibular third molar most likely to be afflicted with pericoronitis is vertical eruption at occlusal plane of the second molar. 4. In relation to angulation and width, it appears that the position of the mandibular third molar most likely to be afflicted with pericoronitis is in a vertically erupted tooth of which the space between the ramus and the distal side of the second molar is less than the mesiodistal diameter of crown. (Class II). 5. In relation to height and width, it appears that the position of the mandibular third molar most likely to be afflicted with pericoronitis is class II width (described above)at occlusal plane of the second molar.

  1. Laparoscopic management of inferior lumbar hernia (Petit triangle hernia).

    Ipek, T; Eyuboglu, E; Aydingoz, O

    2005-05-01

    Lumbar hernias are rare defects in the posterolateral abdominal wall that may be congenital or acquired. We present a case of laparoscopic approach to repair an acquired inferior triangle (Petit) lumbar hernia in a woman by using polytetrafluoroethylene mesh. The size of the hernia was 8 x 10 cm. The length of her hospital stay was 2 days. The patient resumed normal activities in less than 2 weeks. The main advantage of this approach is excellent operative visualization, thus avoiding injury to structures near the hernia during repair. Patients benefit from a minimally invasive approach with less pain, shortened hospital course, less analgesic requirements, better cosmetic result, and minimal life-style interference.

  2. Duplicate inferior vena cava filters: more is not always better.

    Katyal, Anup; Javed, Muhammad Ali

    2016-01-01

    Duplication of the inferior vena cava (IVC) has been reported in literature. This achieves clinical significance in the setting of lower extremity venous thromboembolism with a contraindication for anticoagulation. We describe a case of lower extremity deep vein thrombosis with duplicate IVC. Anticoagulation was contraindicated in this case leading to successful treatment with double IVC filters. We conducted a PubMed search for all current English language published literature, where filters were placed in the presence of duplicate IVC. We suggest that patients with deep vein thrombosis should have an accurate assessment of venous anatomy before IVC filter placement. Duplication of IVC, although rare, should be considered as this has management implications.

  3. Evidence of mirror neurons in human inferior frontal gyrus.

    Kilner, James M; Neal, Alice; Weiskopf, Nikolaus; Friston, Karl J; Frith, Chris D

    2009-08-12

    There is much current debate about the existence of mirror neurons in humans. To identify mirror neurons in the inferior frontal gyrus (IFG) of humans, we used a repetition suppression paradigm while measuring neural activity with functional magnetic resonance imaging. Subjects either executed or observed a series of actions. Here we show that in the IFG, responses were suppressed both when an executed action was followed by the same rather than a different observed action and when an observed action was followed by the same rather than a different executed action. This pattern of responses is consistent with that predicted by mirror neurons and is evidence of mirror neurons in the human IFG.

  4. Amiloidosis renal en paciente con osteomielitis de extremidad inferior

    María Vicente Santos

    2012-09-01

    Full Text Available La amiloidosis secundaria (AA sistémica es una entidad frecuente, asociada con enfermedades inflamatorias e infecciones de larga evolución, así como con algunas neoplasias. Presentamos el caso de un varón de 58 años, con antecedente de úlcera en miembro inferior derecho de más de 30 años de evolución y con síndrome nefrótico secundario a amiloidosis AA.

  5. Inferior ST-Elevation Myocardial Infarction Associated with Takotsubo Cardiomyopathy

    Koeth, Oliver; Zeymer, Uwe; Schiele, Rudolf; Zahn, Ralf

    2010-01-01

    Takotsubo cardiomyopathy (TCM) is usually characterized by transient left ventricular apical ballooning. Due to the clinical symptoms which include chest pain, electrocardiographic changes, and elevated myocardial markers, Takotsubo cardiomyopathy is frequently mimicking ST-elevation myocardial infarction in the absence of a significant coronary artery disease. Otherwise an acute occlusion of the left anterior descending coronary artery can produce a typical Takotsubo contraction pattern. ST-elevation myocardial infarction (STEMI) is frequently associated with emotional stress, but to date no cases of STEMI triggering TCM have been reported. We describe a case of a female patient with inferior ST-elevation myocardial infarction complicated by TCM. PMID:20811565

  6. Inferior ST-Elevation Myocardial Infarction Associated with Takotsubo Cardiomyopathy

    Oliver Koeth

    2010-01-01

    Full Text Available Takotsubo cardiomyopathy (TCM is usually characterized by transient left ventricular apical ballooning. Due to the clinical symptoms which include chest pain, electrocardiographic changes, and elevated myocardial markers, Takotsubo cardiomyopathy is frequently mimicking ST-elevation myocardial infarction in the absence of a significant coronary artery disease. Otherwise an acute occlusion of the left anterior descending coronary artery can produce a typical Takotsubo contraction pattern. ST-elevation myocardial infarction (STEMI is frequently associated with emotional stress, but to date no cases of STEMI triggering TCM have been reported. We describe a case of a female patient with inferior ST-elevation myocardial infarction complicated by TCM.

  7. Renal transplantation in a child with thrombosed inferior vena cava

    Surjeet Kumar

    2014-01-01

    Full Text Available The external iliac vein is commonly used in renal transplantation for vascular anastomosis of the allograft renal vein. However, there are rare instances when the transplant surgeon may encounter thrombosis of the ilio-caval vein during surgery, making renal transplantation a challenge. Often, these patients are considered unsuitable for renal transplantation. We report a case of thrombosis of the inferior vena cava in an asymptomatic pediatric patient in whom the splenic vein was used, at transplantation, for venous drainage. This case highlights that pre-operative Doppler screening should be performed in all potential renal transplant recipients.

  8. Inferior epigastric artery: Surface anatomy, prevention and management of injury.

    Wong, Clare; Merkur, Harry

    2016-04-01

    The anatomical position of the inferior epigastric artery (IEA) subjects it to risk of injury during abdominal procedures that are close to the artery, such as laparoscopic trocar insertion, insertion of intra-abdominal drains, Tenckhoff(®) catheter (peritoneal dialysis catheter) and paracentesis. This article aims to raise the awareness of the anatomical variations of the course of the IEA in relation to abdominal landmarks in order to define a safer zone for laparoscopic ancillary trocar placement. Methods of managing the IEA injury as well as techniques to minimise the risk of injury to the IEA are reviewed and discussed.

  9. Leiomiossarcoma da veia cava inferior: relato de caso

    Rafael Lemos Nascif

    2014-12-01

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

  10. Tuberculosis pulmonar de campos inferiores Lower lung field tuberculosis

    Alejandra González; Marcelo Fernández Casares; Matías Baldini; Alfredo Monteverde

    2010-01-01

    La tuberculosis (TB) que compromete sólo los campos pulmonares inferiores (TBCI) es poco frecuente en el adulto y en general está asociada a alguna causa de inmunodepresión. El objetivo de nuestro trabajo fue determinar la incidencia de TBCI en nuestra población y comparar sus características respecto de la TB pulmonar de localización habitual. Se estudiaron en forma retrospectiva en el período de 2004 a 2008, 42 pacientes con TBCI que fueron comparados con 84 pacientes con TB pulmonar de loc...

  11. Space loss following premature loss of primary second molars.

    Alnahwi, Hassan H; Donly, Kevin J; Contreras, Claudia I

    2015-01-01

    This study was designed to evaluate the amount of space loss (SL) caused by premature loss of primary second molars, determine whether the eruption status of permanent first molars is an important factor in the amount of SL, and evaluate the effectiveness of space maintainers (SMs) in SL prevention. SL associated with 100 prematurely extracted primary second molars was evaluated in 87 healthy patients. Teeth were divided into groups based on the use of SMs (36 with SM and 64 without SM). Bitewing and periapical radiographs taken before extraction and 6, 12, 24, 36, and 48 months after extraction were used to determine the amount of SL. Not every patient attended every recall appointment, so the sample size varied at different evaluation times. The most significant amount of SL occurred in the first 12 months after extraction. In patients who did not use an SM, at 6 months there was a mean SL of 2.12 mm (SD, 1.65 mm) and at 12 months there was a mean of 4.02 mm (SD, 1.65), with significantly more SL in the first 6 months (P 0.05). When patients without an SM were grouped by the eruption status of the permanent first molar, there was significantly more SL in the groups with unerupted first molars than there was in the groups with erupted first molars at both 6 months (P < 0.001) and 12 months (P < 0.05). At both 6 and 12 months, the amount of SL in patients who had an SM (n = 13 and n = 14, respectively) was not significantly different from the amount of SL in those who did not have an SM (n = 33 and n = 23, respectively). SMs should be placed as soon as possible following tooth extraction to prevent undue SL. Placement of an SM a year or more after extraction has minimal benefit, since most SL takes place within the first year. SL does occur even when SMs are used.

  12. Molar Uprighting Using Mini-Screws after Distalization by the Pendulum Appliance: A Case Report

    Amir Moradi

    2013-12-01

    Full Text Available A 16-year-old Class II female patient was treated without tooth extraction. The upper first molars were distalized by the Pendulum appliance. After six months, the molars tipped significantly to the distal. To correct this side effect, we decided to upright the molars using skeletal anchorage. On each side, a mini-screw was inserted between first and second premolars in the buccal cortical plate. An auxiliary spring was placed between the mini-screw head and the molar buccal tube. The resultant moment made the first molar upright. In addition, the side effects of this mechanic, i.e. molar intrusion and molar buccal tipping, counteract the extrusion and medial movement caused by the Pendulum Appliance. The aim of this case report was to present an innovative method for molar uprighting using skeletal anchorage.

  13. The third molar as an age marker in adolescents: new approach to age evaluation.

    Rozkovcova, Eva; Dostalova, Tatjana; Markova, Marie; Broukal, Zdenek

    2012-09-01

    Adolescence is a relatively short period between childhood and adulthood. It is very difficult to determine adulthood based on biological indicators. The third molar may be considered a potential age marker for the period between the ages of 16-21. Our study evaluated a set of 1700 panoramic radiographs of individuals aged between 5 and 21 years. Results confirmed the statistically significant difference in the course of third molars development. The mean deviation for individuals with one third molar agenesis is -0.98 years, for individuals with two third molars agenesis -1.89 years, and with three molars agenesis -3.28 years. Thus, the extent of the deviation is directly proportional to the number of unformed third molars. The calculation of age according to the mean of stages of all third molars could lead to the underestimation of age. No intergender differences were found. Age determination using third molars could be used for forensic purposes.

  14. Spontaneous emergence of overgrown molar teeth in a colony of Prairie voles (Microtus ochrogaster)

    Andrew H Jheon; Michaela Prochazkova; Michael Sherman; Devanand S Manoli; Nirao M Shah; Lawrence Carbone; Ophir Klein

    2015-01-01

    Continuously growing incisors are common to all rodents, which include the Microtus genus of voles. However, unlike many rodents, voles also possess continuously growing molars. Here, we report spontaneous molar defects in a population of Prairie voles (Microtus ochrogaster). We identified bilateral protuberances on the ventral surface of the mandible in several voles in our colony. In some cases, the protuberances broke through the cortical bone. The mandibular molars became exposed and infected, and the maxillary molars entered the cranial vault. Visualisation upon soft tissue removal and microcomputed tomography (microCT) analyses confirmed that the protuberances were caused by the overgrowth of the apical ends of the molar teeth. We speculate that the unrestricted growth of the molars was due to the misregulation of the molar dental stem cell niche. Further study of this molar phenotype may yield additional insight into stem cell regulation and the evolution and development of continuously growing teeth.

  15. Periodontal pathogens in erupting third molars of periodontally healthy subjects.

    Rajasuo, A; Sihvonen, O J; Peltola, M; Meurman, J H

    2007-09-01

    The presence of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia and Tannerella forsythensis in bacteriologic samples of 5-7-mm deep mandibular third-molar pericoronal pockets was analysed by polymerase chain reaction, to test the hypothesis that these sites would harbour the bacteria. The patients were periodontally healthy 20-year-old Finnish male conscripts. Sixteen had acute pericoronitis, 28 chronic pericoronitis, and 15 were symptom-free controls. A. actinomycetemcomitans was detected in only 7% of the samples from chronic pericoronitis cases, whereas P. gingivalis was positive in 20% of the symptom-free versus 69% (P = 0.018) of the acute and 57% (P = 0.044) of the chronic cases. The percentages for P. intermedia were 93, 94 and 93%, and for T. forsythensis 47, 63 and 57%, respectively. These results confirm that, apart from A. actinomycetemcomitans, periodontopathogens are common in third-molar sites in periodontally healthy individuals.

  16. Fraktur Patologis Mandibula Akibat Komplikasi Odontektomi Gigi Molar 3 Bawah

    Dicky Firmansyah

    2012-10-01

    Full Text Available The removal of impacted mandibular molar by surgery (odontectomi is a common procedure done by the dentist in daily practice. A well and proper operation technique is required to avoid unexpected complication after odontectomy. A 48 years oldwomen is reported with pathological sinistra mandible angle fracture after odontectomy of mandibular third molar done by Yordania Oral Surgeon two month ago. Patient was refered to Departemen of Oral Surgery RSCM. Reposition and fragmen fixation using plate-srew and arch bar. In this paper, writer try to discuss about the posible cause of complication. Hopefully, dentists will be more careful in doing odontectomy procedure, to avoid unexpected complications.DOI:10.14693/jdi.v15i3.25

  17. Monopolar intracochlear pulse trains selectively activate the inferior colliculus.

    Schoenecker, Matthew C; Bonham, Ben H; Stakhovskaya, Olga A; Snyder, Russell L; Leake, Patricia A

    2012-10-01

    Previous cochlear implant studies using isolated electrical stimulus pulses in animal models have reported that intracochlear monopolar stimulus configurations elicit broad extents of neuronal activation within the central auditory system-much broader than the activation patterns produced by bipolar electrode pairs or acoustic tones. However, psychophysical and speech reception studies that use sustained pulse trains do not show clear performance differences for monopolar versus bipolar configurations. To test whether monopolar intracochlear stimulation can produce selective activation of the inferior colliculus, we measured activation widths along the tonotopic axis of the inferior colliculus for acoustic tones and 1,000-pulse/s electrical pulse trains in guinea pigs and cats. Electrical pulse trains were presented using an array of 6-12 stimulating electrodes distributed longitudinally on a space-filling silicone carrier positioned in the scala tympani of the cochlea. We found that for monopolar, bipolar, and acoustic stimuli, activation widths were significantly narrower for sustained responses than for the transient response to the stimulus onset. Furthermore, monopolar and bipolar stimuli elicited similar activation widths when compared at stimulus levels that produced similar peak spike rates. Surprisingly, we found that in guinea pigs, monopolar and bipolar stimuli produced narrower sustained activation than 60 dB sound pressure level acoustic tones when compared at stimulus levels that produced similar peak spike rates. Therefore, we conclude that intracochlear electrical stimulation using monopolar pulse trains can produce activation patterns that are at least as selective as bipolar or acoustic stimulation.

  18. Radiographic Evaluation of the Status of Third Molars in Sriganganagar Population – A Digital Panoramic Study

    Goyal, Sharry; Verma, Pradhuman; Raj, Seetharamaiha Sunder

    2016-01-01

    Background Third molar (M3) agenesis and impaction are associated with evolution, changed dietary habits, and human jaw growth. The aim of the study was to radiographically evaluate the prevalence of M3s agenesis, impacted M3s with different impaction patterns, and the approximation of Inferior Dental Canal (IDC) with impacted mandibular M3s roots among the Sriganganagar population. Methods The study included 700 randomly selected subjects from OPD with an age range of 25–45 years. Digital OPGs were taken for all subjects using Kodak 8000C digital OPG machine. The M3 impaction patterns were evaluated using Winter’s classification. Results The prevalence of subjects with at least one M3 agenesis was found to be 34.1% and with 95% confidence interval was 30.6% to 37.6%. The overall M3s agenesis was 16.8% with more prevalence in the males. The patients with agenesis of one M3, two M3s, three M3s, and four M3s were 14.4%, 11.3%, 3.7% and 4.7%, respectively. M3 agenesis was more in the upper jaw and on the left side. The total impacted M3s were 21.11% with more prevalence in mixed diet subjects. Mesioangular was most common impaction pattern, and notching was most prevalent IDC relationship with impacted mandibular M3s roots. Conclusion This study highlighted the evolutionary increasing M3 agenesis and the importance of diagnostic OPG for seeing the status of M3s in jaws.

  19. Fate of the molar dental lamina in the monophyodont mouse.

    Dosedělová, Hana; Dumková, Jana; Lesot, Hervé; Glocová, Kristýna; Kunová, Michaela; Tucker, Abigail S; Veselá, Iva; Krejčí, Pavel; Tichý, František; Hampl, Aleš; Buchtová, Marcela

    2015-01-01

    The successional dental lamina (SDL) plays an essential role in the development of replacement teeth in diphyodont and polyphyodont animals. A morphologically similar structure, the rudimental successional dental lamina (RSDL), has been described in monophyodont (only one tooth generation) lizards on the lingual side of the developing functional tooth. This rudimentary lamina regresses, which has been proposed to play a role in preventing the formation of future generations of teeth. A similar rudimentary lingual structure has been reported associated with the first molar in the monophyodont mouse, and we show that this structure is common to all murine molars. Intriguingly, a lingual lamina is also observed on the non-replacing molars of other diphyodont mammals (pig and hedgehog), initially appearing very similar to the successional dental lamina on the replacing teeth. We have analyzed the morphological as well as ultrastructural changes that occur during the development and loss of this molar lamina in the mouse, from its initiation at late embryonic stages to its disappearance at postnatal stages. We show that loss appears to be driven by a reduction in cell proliferation, down-regulation of the progenitor marker Sox2, with only a small number of cells undergoing programmed cell death. The lingual lamina was associated with the dental stalk, a short epithelial connection between the tooth germ and the oral epithelium. The dental stalk remained in contact with the oral epithelium throughout tooth development up to eruption when connective tissue and numerous capillaries progressively invaded the dental stalk. The buccal side of the dental stalk underwent keratinisation and became part of the gingival epithelium, while most of the lingual cells underwent programmed cell death and the tissue directly above the erupting tooth was shed into the oral cavity.

  20. Fate of the molar dental lamina in the monophyodont mouse.

    Hana Dosedělová

    Full Text Available The successional dental lamina (SDL plays an essential role in the development of replacement teeth in diphyodont and polyphyodont animals. A morphologically similar structure, the rudimental successional dental lamina (RSDL, has been described in monophyodont (only one tooth generation lizards on the lingual side of the developing functional tooth. This rudimentary lamina regresses, which has been proposed to play a role in preventing the formation of future generations of teeth. A similar rudimentary lingual structure has been reported associated with the first molar in the monophyodont mouse, and we show that this structure is common to all murine molars. Intriguingly, a lingual lamina is also observed on the non-replacing molars of other diphyodont mammals (pig and hedgehog, initially appearing very similar to the successional dental lamina on the replacing teeth. We have analyzed the morphological as well as ultrastructural changes that occur during the development and loss of this molar lamina in the mouse, from its initiation at late embryonic stages to its disappearance at postnatal stages. We show that loss appears to be driven by a reduction in cell proliferation, down-regulation of the progenitor marker Sox2, with only a small number of cells undergoing programmed cell death. The lingual lamina was associated with the dental stalk, a short epithelial connection between the tooth germ and the oral epithelium. The dental stalk remained in contact with the oral epithelium throughout tooth development up to eruption when connective tissue and numerous capillaries progressively invaded the dental stalk. The buccal side of the dental stalk underwent keratinisation and became part of the gingival epithelium, while most of the lingual cells underwent programmed cell death and the tissue directly above the erupting tooth was shed into the oral cavity.

  1. Analysis of the mineral composition of hypomineralized first permanent molars

    Martinović Brankica

    2015-01-01

    Full Text Available Background/Aim. Hypomineralization of molars and incisors (molar-incisor hypomineralization - MIH is defined as enamel hypomineralization of systemic origin of one or more of the four first permanent molars, which may be associated with changes in the maxillary, and less frequently in the permanent mandibular incisors. The aim of this study was to investigate the mineral content in hypomineralized teeth as a contribution to under-standing the origin of these changes, which will be important for effective restorative approach. Methods. A total of 10 extracted first permanent molars diagnosed with MIH were used in the study as the experimental group, and intact first premolars extracted for orthodontic reasons were used as the control group. A certain surface of hypomineralized аnd healthy enamel and dentin was analyzed using a scanning electron microscope equipped with an energydispersive spectrometer (SEM/EDS. Results. By conducting quantitative chemical analysis of the distribution of the basic chemical elements, it was found that the concentration of calcium (Ca and phosphorus (P was significantly higher in healthy enamel (Ca = 28.80 wt%, and P = 15.05 wt% compared to hypomineralized enamel (Ca = 27.60 wt% and P = 14.32 wt%. Carbon (C concentration was statistically significantly higher in hypomineralized enamel (C = 11.70 wt% compared to healthy enamel (C = 10.94 wt%. Hypomineralized and healthy enamel did not differ significantly regarding the ratio of calcium and phosphorus concentrations whereas the ratio of calcium and carbon concentrations was statistically significantly higher in healthy enamel compared to hypomineralized enamel. Conclusion. Concentration of the main chemical elements, primarily calcium and phosphorus, is significantly reduced in hypomineralized enamel whereas carbon concentration is increased compared to healthy enamel.

  2. A new method for the determination of the nitrogen content of nitrocellulose based on the molar ratio of nitrite-to-nitrate ions released after alkaline hydrolysis

    Alinat, Elodie, E-mail: elodie.alinat@chimie-paristech.fr [PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris (France); Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris (France); CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris (France); Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris (France); Delaunay, Nathalie, E-mail: nathalie.delaunay@espci.fr [PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris (France); CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris (France); Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris (France); Archer, Xavier, E-mail: xavier.archer@interieur.gouv.fr [Central Laboratory of Police Prefecture (LCPP), 39 bis rue de Dantzig, 75015 Paris (France); Mallet, Jean-Maurice, E-mail: jean-maurice.mallet@es.fr [École Normale Supérieure-PSL Research University, Département de Chimie, 24 rue Lhomond, 75005 Paris (France); Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris (France); CNRS, UMR 7203 LBM, F-75005 Paris (France); Gareil, Pierre, E-mail: pierre.gareil@chimie-paristech.fr [PSL Research University, Chimie ParisTech, Laboratory of Physicochemistry of Electrolytes, Colloids and Analytical Sciences (PECSA), 11 rue Pierre et Marie Curie, 75005 Paris (France); CNRS, UMR 7195 PECSA, 11 rue Pierre et Marie Curie, 75005 Paris (France); Sorbonne Universités, UPMC Univ Paris 06, LBM, 4 place Jussieu, F-75005 Paris (France)

    2015-04-09

    Highlights: • New insights into the nitrocellulose alkaline denitration mechanism. • Linear correlation for molar ratio of nitrite-to-nitrate ions and nitrogen content. • Capillary electrophoresis monitoring of nitrite and nitrate ions. • Applications to explosive and non-explosive nitrocellulose-containing samples. • Improved performances (including safety) over classical methods. - Abstract: A new method was proposed to determine the nitrogen content of nitrocelluloses (NCs). It is based on the finding of a linear relationship between the nitrogen content and the molar ratio of nitrite-to-nitrate ions released after alkaline hydrolysis. Capillary electrophoresis was used to monitor the concentration of nitrite and nitrate ions. The influences of hydrolysis time and molar mass of NC on the molar ratio of nitrite-to-nitrate ions were investigated, and new insights into the understanding of the alkaline denitration mechanism of NCs, underlying this analytical strategy is provided. The method was then tested successfully with various explosive and non-explosive NC-containing samples such as various daily products and smokeless gunpowders. Inherently to its principle exploiting a concentration ratio, this method shows very good repeatability in the determination of nitrogen content in real samples with relative standard deviation (n = 3) inferior to 1.5%, and also provides very significant advantages with respect to sample extraction, analysis time (1 h for alkaline hydrolysis, 3 min for electrophoretic separation), which was about 5 times shorter than for the classical Devarda's method, currently used in industry, and safety conditions (no need for preliminary drying NC samples, mild hydrolysis conditions with 1 M sodium hydroxide for 1 h at 60 °C)

  3. Prevention and treatment of neurosensory disturbance after lower third molar surgery

    Leung, Yiu-yan; 梁耀殷

    2014-01-01

    Neurosensory deficit is a well-reported complication after lower third molar surgery. It is useful to know the outcomes of the available treatments for neurosensory deficit after third molar surgery. It is more important to prevent nerve injury from third molar surgery. This thesis aims1) to evaluate the outcomes of treatments for neurosensory deficit after lower third molar surgery; 2) to investigate the effect of permanent neurosensory deficit from the patient’s perspective;3) to identify r...

  4. Characterization on the Mean Molar Absorptivity of Amino Acids in Microbial Lipopeptides

    2006-01-01

    The molar absorption coefficients of each of 14 kinds of amino acids were determined by the spectrophotometric method, and the mean molar absorption coefficients of 37 different mixtures of each with amino acid composition exactly equivalent to that of the peptide chain of the corresponding lipopeptide were determined based on calculation or experimental. The significance of the results is that the mean molar absorption coefficients strongly demonstrate the regular patterns, though different amino acids bear quite different molar absorption coefficients.

  5. Molar macrowear reveals Neanderthal eco-geographic dietary variation.

    Luca Fiorenza

    Full Text Available Neanderthal diets are reported to be based mainly on the consumption of large and medium sized herbivores, while the exploitation of other food types including plants has also been demonstrated. Though some studies conclude that early Homo sapiens were active hunters, the analyses of faunal assemblages, stone tool technologies and stable isotopic studies indicate that they exploited broader dietary resources than Neanderthals. Whereas previous studies assume taxon-specific dietary specializations, we suggest here that the diet of both Neanderthals and early Homo sapiens is determined by ecological conditions. We analyzed molar wear patterns using occlusal fingerprint analysis derived from optical 3D topometry. Molar macrowear accumulates during the lifespan of an individual and thus reflects diet over long periods. Neanderthal and early Homo sapiens maxillary molar macrowear indicates strong eco-geographic dietary variation independent of taxonomic affinities. Based on comparisons with modern hunter-gatherer populations with known diets, Neanderthals as well as early Homo sapiens show high dietary variability in Mediterranean evergreen habitats but a more restricted diet in upper latitude steppe/coniferous forest environments, suggesting a significant consumption of high protein meat resources.

  6. A Neanderthal lower molar from Stajnia Cave, Poland.

    Dąbrowski, P; Nowaczewska, W; Stringer, C B; Compton, T; Kruszyński, R; Nadachowski, A; Stefaniak, K; Urbanowski, M

    2013-04-01

    The primary aim of this study was to conduct a taxonomic assessment of the second of three isolated human teeth found in the Stajnia Cave (north of the Carpathians, Poland) in 2008. The specimen was located near a human tooth (S5000), which was identified by Urbanowski et al. (2010) as a Neanderthal permanent upper molar. Both of these teeth were excavated from the D2 layer, which belongs to the D stratigraphic complex comprising the archaeological assemblage associated with the Micoquian tradition. An Ursus spelaeus bone and Mammuthus primigenius tooth that were also excavated from the D2 layer were dated to >49,000 years BP (by AMS (14)C) and 52.9 ka BP (by U-Th), respectively. The sediment overlying stratigraphic complex D was dated to 45.9 ka BP by the OSL method. The S4300 tooth is a lower first or second permanent molar belonging to an individual other than that who once possessed the S5000 tooth. The S4300 tooth exhibits a combination of traits typical of Neanderthal lower molars, including a mid-trigonid crest, large anterior fovea, taurodontism and subvertical grooves on the interproximal face, indicating that this tooth belonged to a Neanderthal individual. The S4300 tooth from Stajnia Cave is one of the oldest human remains found in Poland.

  7. Decontamination of tried-in orthodontic molar bands.

    Fulford, M R; Ireland, A J; Main, B G

    2003-12-01

    Molar bands are commonly used to retain orthodontic attachments on posterior teeth and due to the variation in the size of such teeth, it is usually necessary to 'try in' several bands before the correct one is selected. A possible concern with re-using such bands is the lack of cross-infection control, even following autoclaving, due to the presence of one or more small bore lumen (the archwire and headgear tubes). The aim of this experiment was, therefore, to determine whether such bands could be successfully decontaminated so that they could be re-used without a cross-infection risk. Two hundred orthodontic molar bands that had previously been tried in patients' mouths, but not cemented into place, were tested. Each band was decontaminated using an enzymatic cleaner/disinfectant and then sterilized using either a downward displacement (n = 100) or a vacuum cycle autoclave (n = 100). Following autoclaving each band was inoculated into brain heart infusion culture broth and incubated at 37 degrees C for 5 days. None of the decontaminated bands exhibited growth after 5 days. It would appear that, using this methodology, there is little risk of a cross-infection hazard occurring with the re-use of previously tried-in and decontaminated molar bands.

  8. Interfacial Properties of Methylcelluloses: The Influence of Molar Mass

    Pauline L. Nasatto

    2014-12-01

    Full Text Available The interfacial interactions of four methylcelluloses having the same average degree of substitution and distribution of methyl groups, but different molar masses, are studied at ambient temperature and at very low polymer concentrations. Firstly, the surface tension σ at the water/air interface is determined for the progressive addition of methylcellulose up to 100 mg/L; σ starts to decrease over 1 mg/L up to the critical aggregation concentration (CAC at 10 mg/L. The curves describing the influence of polymer concentration on σ are independent of the molar mass at equilibrium. Secondly, the adsorption of methylcellulose on silica particles is estimated from ζ-potential measurements. The data are interpreted in terms of an increase of the adsorbed layer thickness at the interface when the molar mass of methylcellulose increases. It is concluded that methylcellulose is adsorbed, forming trains and loops at the interface based on the equilibrium between surface free energy and solvent quality.

  9. 3-D diagnosis-assisted management of anomalous mandibular molar

    Neelam Mittal

    2012-01-01

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

  10. Quality of life following third molar removal under conscious sedation

    Sancho-Puchades, Manuel; Berini-Aytés, Leonardo; Gay-Escoda, Cosme

    2012-01-01

    Aim: The aim of this study was to assess quality of life (QoL) and degree of satisfaction among outpatients subjected to surgical extraction of all four third molars under conscious sedation. A second objective was to describe the evolution of self-reported pain measured in a visual analogue scale (VAS) in the 7 days after extraction. Study design: Fifty patients received a questionnaire assessing social isolation, working isolation, eating and speaking ability, diet modifications, sleep impairment, changes in physical appearance, discomfort at suture removal and overall satisfaction at days 4 and 7 after surgery. Pain was recorded by patients on a 100-mm pain visual analogue scale (VAS) every day after extraction until day 7. Results: Thirty-nine patients fulfilled correctly the questionnaire. Postoperative pain values suffered small fluctuations until day 5 (range: 23 to 33 mm in a 100-mm VAS), when dicreased significantly. A positive association was observed between difficult ranked surgeries and higher postoperative pain levels. The average number of days for which the patient stopped working was 4.9. Conclusion: The removal of all third molars in a single appointment causes an important deterioration of the patient’s QoL during the first postoperative week, especially due to local pain and eating discomfort. Key words:Third molar removal, quality of life, sedation. PMID:22926461

  11. Molar pregnancy with multiple organ dysfunction, an interesting

    Purnima deb

    2011-01-01

    Full Text Available Successful management and cure of gestational trophoblastic disease [GTD, molar ] depends upon prompt, accurate diagnosis and institution of individualized, therapeutic modalities. Because Molar pregnancies encompasses multitude of clinical entities, each with myriad presentations, clinicians must remain alert to identify patients exhibiting signs and symptoms consistent with GTD [molar]. Armed with a high index of suspicion, physicians may target such individuals and launch the appropriate diagnostic barrage, leading to triage for treatment early in the course of the disease. The disease if not diagnosed early may lead to complication such as, acute respiratory distress, cardiac failure, liver and renal failure. Intracranial bleeding and seizures complicated with infection and coagulation failure may lead to death of these young women. Little data are available to assist in the counselling of women with diagnosis and compulsory follow up. Appropriate contraception should be discussed and advise given before discharge as they may get lost to follow up. These women should be informed of the elevated risk of developing malignant sequlae in future.

  12. Subcutaneous emphysema during third molar surgery: a case report.

    Romeo, Umberto; Galanakis, Alexandros; Lerario, Francesco; Daniele, Gabriele Maria; Tenore, Gianluca; Palaia, Gaspare

    2011-01-01

    Extraction of third molars is the most common surgical procedure performed in oral surgery on a daily basis and, despite surgical skills and expertise, complications may occur. Complications observed during or after third molar removal may include pain, swelling, bleeding, infection, sinus perforation and nerve damage. Fortunately, with a proper management and a good surgical technique, the incidence of such events is low. Subcutaneous emphysema associated with dental extraction occurs when the air from the high-speed dental handpiece is forced into the soft tissue through the reflected flap and invades the adjacent tissues, leading to swelling, crepitus on palpation and occasionally spreading through the tissue spaces of the fascial planes. Although rare, iatrogenic subcutaneous emphysema can have serious and potentially life-threatening consequences. Care should be taken when using air-driven handpieces. The access of air into the facial tissues is not limited to tooth extractions, but may also occur through other portals of entrance, such as endodontically treated teeth, periodontium and lacerations of intraoral soft tissues. When subcutaneous emphysema occurs, it must be quickly diagnosed and properly managed to reduce the risk of further complications. This report presents a case of subcutaneous emphysema occurred during extraction of a mandibular third molar extraction with the use of an air turbine handpiece. Case management is described and issues relative to the diagnosis and prevention of this surgical complication are discussed.

  13. Evaluation of periodontal condition in intruded molars using miniscrews

    Habib Ollah Ghanbari

    2015-12-01

    Full Text Available Introduction: The purpose of this preliminary study was to evaluate the periodontal condition of intruded molars in various phases of treatments. Methods: 30 patients with at least one overerupted upper first molar were selected. Upper molar bands with brackets were cemented. Two miniscrews were placed in the mesiopalatal and mesiobuccal aspect of the aforementioned teeth. A titanium molybdenum alloy (TMA spring was attached to the head of miniscrew in one end and ligated to the bracket in the other end to reach the predetermined force. Plaque index (PI, probing pocket depth (PPD, keratinized gingiva (KG, The distance between miniscrew (M.S and gingival level (GL, and bleeding on probing (BOP were recorded before loading and 1, 2, 3, 4 and 5 months post-loading .Results:  All patients completed the study and no complications were reported. Statistically significant intrusion (2.1 ± 0.9 mm was obtained during active treatment. Inserting miniscrews generally was presented with greater sulcus bleeding, plaque accumulation and plaque formation at follow-up visits. There was a statistically significant increase in PI, PPD and BOP indices. Furthermore, the results showed decrease in KG level and M.S to GL level. Conclusion: Miniscrews can provide a clinical benefit as an absolute anchorage device. However, keeping a good oral hygiene is essential to achieve ideal results, because the presence of miniscrews, as a foreign object in mouth, and intrusion force might be harmful for periodontal tissues

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

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

    2015-01-01

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

  15. The origin of the lower fourth molar in canids, inferred by individual variation

    Masakazu Asahara

    2016-11-01

    Full Text Available Background An increase in tooth number is an exception during mammalian evolution. The acquisition of the lower fourth molar in the bat-eared fox (Otocyon megalotis, Canidae, Carnivora, Mammalia is one example; however, its developmental origin is not clear. In some canids (Canidae, individual variation exist as supernumerary molar M4. This study focuses on the acquisition of the lower fourth molar in canids and proposes that the inhibitory cascade model can explain its origin. Methods Occlusal view projected area of lower molars was determined from 740 mandibles obtained from Canis latrans, Nyctereutes procyonoides, and Urocyon cinereoargenteus museum specimens. For each molar, relative sizes of molars (M2/M1 and M3/M1 scores affected by inhibition/activation dynamics during development, were compared between individuals with and without supernumerary molar (M4. Results Possession of a supernumerary molar was associated with significantly larger M2/M1 score in Canis latrans, M3/M1 score in Nyctereutes procyonoides, and M2/M1 and M3/M1 scores in Urocyon cinereoargenteus compared to individuals of these species that lacked supernumerary molars. Discussion We propose that, in canids, the supernumerary fourth molar is attributable to reduced inhibition and greater activation during molar development. In the bat-eared fox, altered inhibition and activation dynamics of dental development during omnivorous-insectivorous adaptation may be a contributing factor in the origin of the lower fourth molar.

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

    2013-01-01

    Purpose This study was performed to determine the relationship between the stage of tooth eruption (both vertical and mesio-angular) and chronological age. Materials and Methods Indirect digital panoramic radiographs were used to measure the distances from the dentinoenamel junction (DEJ) of the second molars to the occlusal plane of the second molar teeth and of the adjacent third molars in 264 Thai males and 437 Thai females using ImageJ software. The ratio of those distances was calculated...

  17. Transmigración del canino inferior incluido: presentación de un caso y revisión de la literatura

    Torres Lagares, Daniel; Flores Ruiz, Rafael; Infante Cossío, Pedro; Gutiérrez Pérez, José Luis

    2006-01-01

    La retención, es decir, la no erupción de un diente permanente más allá de un año después de la edad normal de erupción, es relativamente poco frecuente si exceptuamos el caso de los terceros molares y los caninos superiores. La transmigración se define como el fenómeno en el cual un diente incluido no erupcionado traspasa en más de la mitad de su longitud la línea media. Exponemos el caso clínico de una paciente de 20 años de edad, que presentaba la transmigración del canino inferior izqu...

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

    Gintaras Juodzbalys

    2011-01-01

    Full Text Available Objectives: The purpose of present article was to review aetiological factors, mechanism, clinical symptoms, and diagnostic methods as well as to create treatment guidelines for the management of inferior alveolar nerve injury during dental implant placement.Material and Methods: Literature was selected through a search of PubMed, Embase and Cochrane electronic databases. The keywords used for search were inferior alveolar nerve injury, inferior alveolar nerve injuries, inferior alveolar nerve injury implant, inferior alveolar nerve damage, inferior alveolar nerve paresthesia and inferior alveolar nerve repair. The search was restricted to English language articles, published from 1972 to November 2010. Additionally, a manual search in the major anatomy, dental implant, periodontal and oral surgery journals and books were performed. The publications there selected by including clinical, human anatomy and physiology studies.Results: In total 136 literature sources were obtained and reviewed. Aetiological factors of inferior alveolar nerve injury, risk factors, mechanism, clinical sensory nerve examination methods, clinical symptoms and treatment were discussed. Guidelines were created to illustrate the methods used to prevent and manage inferior alveolar nerve injury before or after dental implant placement.Conclusions: The damage of inferior alveolar nerve during the dental implant placement can be a serious complication. Clinician should recognise and exclude aetiological factors leading to nerve injury. Proper presurgery planning, timely diagnosis and treatment are the key to avoid nerve sensory disturbances management.

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

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

    2009-01-01

    Objetivo: Efectuar restauraciones cerámicas Cerec (feldespática y de dióxido de circonio) en molares jóvenes con endodoncia, para prevenir complicaciones en el aparato estomatognático por la pérdida de estos dientes. Material y métodos: Se describe la confección de restauraciones cerámicas a nivel de la zona molar mandibular derecha de un paciente del género femenino de 18 años de edad, a quien se le realizó radiografía periapical, por presentar dolor espontáneo en el lado derecho mandibular....

  20. Efeito transversal da placa lábio-ativa aberta e fixa associada à extensão lingual de canino decíduo a primeiro molar permanente: estudo em modelos digitais

    Lara, Tulio Silva

    2011-01-01

    Introdução: O objetivo do presente estudo clínico foi avaliar as dimensões transversais do arco dentário inferior com o uso da placa lábio-ativa aberta e fixa associada à extensão lingual de canino decíduo a primeiro molar permanente. Métodos: A amostra constou de 14 pacientes no estágio de dentadura mista e com idade média de oito anos e seis meses. Todos os pacientes realizaram expansão rápida da maxila e expansão lenta do arco inferior com a placa lábio-ativa. Modelos de gesso foram obtido...

  1. Management of bilateral severely impacted mandibular second molars: a case report.

    Manosudprasit, Montian; Wangsrimongkol, Tasanee; Pisek, Poonsak; Chantaramungkorn, Melissa

    2013-09-01

    Impaction of the mandibular second molar is relatively rare but when it occurs it may cause a clinical problem for orthodontist and oral surgeon. There are various treatment options to manage this condition depending on the degree of second molar inclination, the position of third molars, and the desired type of tooth movement. Here, a case of orthodontic uprighting of bilateral horizontal impaction of the lower second molars in a 17-years-old Thai female patient is presented. Correction of the impactions involved removal of the overlying third molars and use of full edgewise appliances with open NiTi-coil spring and super-elastic NiTi archwire.

  2. Surgical extraction of deeply horizontally impacted mandibular second and third molars.

    Boffano, Paolo; Gallesio, Cesare; Bianchi, Francesca; Roccia, Fabio

    2010-03-01

    The presence of deeply horizontally impacted lower second and third molars is unusual. The arrested eruption of the lower second and third molars can determine disturbances of mastication and aesthetics. Moreover, an increased risk of caries in the distal side of the first lower molar is possible. Different therapeutic approaches could be proposed for second and third molar impaction and malposition. In this article, we report the management and the outcome of the surgical treatment of a patient with impacted mandibular second and third molars.

  3. Preservation of the recipient inferior vena cava in liver transplantation.

    Pereira, F; Herrera, J; Mora, N P; Nuño, J; Turrión, V S; Vicente, E; Ardaiz, J

    1994-01-01

    Twenty piggy-back (PB) liver transplantations (LT) were compared with 20 LT performed by the standard technique in order to evaluate whether or not the theoretical haemodynamic advantages of the preservation of the inferior vena cava (IVC) have any impact on the final results of the LT. Statistically significant differences were observed in the duration of the hepatectomy, which was longer for PB LT (192 min vs. 146 min), and in the duration of the anhepatic phase, which was shorter in that group (52 min vs. 76 min). There were no differences in the duration of the complete surgical procedure, consumption of blood products, incidence of postoperative acute renal failure, number of reoperations or survival.

  4. Inhibition and the right inferior frontal cortex: one decade on.

    Aron, Adam R; Robbins, Trevor W; Poldrack, Russell A

    2014-04-01

    In our TICS Review in 2004, we proposed that a sector of the right inferior frontal cortex (rIFC) in humans is critical for inhibiting response tendencies. Here we survey new evidence, discuss ongoing controversies, and provide an updated theory. We propose that the rIFC (along with one or more fronto-basal-ganglia networks) is best characterized as a brake. This brake can be turned on in different modes (totally, to outright suppress a response; or partially, to pause), and in different contexts (externally, by stop or salient signals; or internally, by goals). We affirm inhibition as a central component of executive control that relies upon the rIFC and associated networks, and explain why rIFC disruption could generally underpin response control disorders.

  5. Infrahepatic inferior vena cava agenesis with bilateral renal vein thrombosis.

    Skeik, Nedaa; Wickstrom, Kelly K; Schumacher, Clark W; Sullivan, Timothy M

    2013-10-01

    Congenital anomalies of the inferior vena cava (IVC) are rare and are estimated to be present in 0.07-8.7% of the general population. IVC agenesis (IVCA) is found in approximately 5% of cases of unprovoked lower extremity deep vein thrombosis in patients Renal vein thrombosis (RVT) is an extremely rare and unusual presentation of IVCA. We report a unique case of a 23-year-old previously healthy man presenting with infrahepatic IVCA-induced bilateral RVT with azygos and hemiazygos continuation. To our knowledge, this is the third reported case in the literature of IVCA-induced RVT and the first to affect the bilateral renal veins in the absence of any other thrombogenic risk factors or any lower extremity venous complications. We also present a literature review of IVCA-induced vein thrombosis and highlight the lack of literature to manage this condition.

  6. Pseudoaneurisma Ventricular Izquierdo en Cara Inferior con Flujo Bidireccional

    Adrián J Da Silva-De Abreu

    2011-01-01

    Full Text Available Los pseudoaneurismas son complicaciones infrecuentes de los infartos del miocardio. Consisten en un saco pericárdico que comunica con la cavidad ventricular a través de un cuello de menor diámetro. Se presenta el caso de una paciente de 68 años de edad, con DM II e HTA, sufre Infarto Agudo del Miocardio en Mayo del 2008, presentando disnea y tos por una semana, con diaforesis profusa de inicio súbito y síncope sin dolor precordial. El electrocardiograma reporta zonas de isquemia transmural y subendocárdica en caras inferolateral y lateral alta; respectivamente, y zona eléctricamente inactivable en cara inferior. El ecocardiograma transtorácico muestra el ventrículo izquierdo con dilatación severa, disminución de la fracción de eyección (25% y un pseudoaneurisma de la pared inferior con cuello de 3 mm a través del cual se evidencia flujo bidireccional: de entrada al ventrículo durante la diástole y salida al pseudoaneurisma en sístole. El flujo bidireccional y el gasto cardíaco disminuido contribuyen a evitar el taponamiento cardiaco, sin embargo, en condiciones de mayor demanda el pseudoaneurisma podría perforarse y ocasionar dicha entidad. De ello, la importancia del diagnostico diferencial con los aneurismas verdaderos, lo cual permite llevar a cabo la terapéutica adecuada y evitar tal complicación. Palabras claves: Pseudoaneurisma, Infarto del Miocardio, Diabetes.

  7. Pseudoaneurisma Ventricular Izquierdo en Cara Inferior con Flujo Bidireccional

    Adrián J Da Silva-De Abreu

    2009-01-01

    Full Text Available Los pseudoaneurismas son complicaciones infrecuentes de los infartos del miocardio. Consisten en un saco pericárdico que comunica con la cavidad ventricular a través de un cuello de menor diámetro. Se presenta el caso de una paciente de 68 años de edad, con DM II e HTA, sufre Infarto Agudo del Miocardio en Mayo del 2008, presentando disnea y tos por una semana, con diaforesis profusa de inicio súbito y síncope sin dolor precordial. El electrocardiograma reporta zonas de isquemia transmural y subendocárdica en caras inferolateral y lateral alta, respectivamente, y zona eléctricamente inactivable en cara inferior. El ecocardiograma transtorácico muestra el ventrículo izquierdo con dilatación severa, disminución de la fracción de eyección (25% y un pseudoaneurisma de la pared inferior con cuello de 3 mm a través del cual se evidencia flujo bidireccional, de entrada al ventrículo durante la diástole y salida al pseudoaneurisma en sístole. El flujo bidireccional y el gasto cardíaco disminuido contribuyen a evitar el taponamiento cardiaco, sin embargo, en condiciones de mayor demanda el pseudoaneurisma podría perforarse y ocasionar dicha entidad. De ello, la importancia del diagnostico diferencial con los aneurismas verdaderos, lo cual permite llevar a cabo la terapéutica adecuada y evitar tal complicación.

  8. Electrophysiological properties of inferior olive neurons: A compartmental model.

    Schweighofer, N; Doya, K; Kawato, M

    1999-08-01

    As a step in exploring the functions of the inferior olive, we constructed a biophysical model of the olivary neurons to examine their unique electrophysiological properties. The model consists of two compartments to represent the known distribution of ionic currents across the cell membrane, as well as the dendritic location of the gap junctions and synaptic inputs. The somatic compartment includes a low-threshold calcium current (I(Ca_l)), an anomalous inward rectifier current (I(h)), a sodium current (I(Na)), and a delayed rectifier potassium current (I(K_dr)). The dendritic compartment contains a high-threshold calcium current (I(Ca_h)), a calcium-dependent potassium current (I(K_Ca)), and a current flowing into other cells through electrical coupling (I(c)). First, kinetic parameters for these currents were set according to previously reported experimental data. Next, the remaining free parameters were determined to account for both static and spiking properties of single olivary neurons in vitro. We then performed a series of simulated pharmacological experiments using bifurcation analysis and extensive two-parameter searches. Consistent with previous studies, we quantitatively demonstrated the major role of I(Ca_l) in spiking excitability. In addition, I(h) had an important modulatory role in the spike generation and period of oscillations, as previously suggested by Bal and McCormick. Finally, we investigated the role of electrical coupling in two coupled spiking cells. Depending on the coupling strength, the hyperpolarization level, and the I(Ca_l) and I(h) modulation, the coupled cells had four different synchronization modes: the cells could be in-phase, phase-shifted, or anti-phase or could exhibit a complex desynchronized spiking mode. Hence these simulation results support the counterintuitive hypothesis that electrical coupling can desynchronize coupled inferior olive cells.

  9. Compensation trends of the angulation of first molars: retrospective study of 1403 malocclusion cases.

    Su, Hong; Han, Bing; Li, Sa; Na, Bin; Ma, Wen; Xu, Tian-Min

    2014-09-01

    We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First, angulation of the upper first molar varied significantly with age and tipped most distally in cases aged 16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.

  10. Compensation trends of the angulation of first molars:retrospective study of 1 403 malocclusion cases

    Hong Su; Bing Han; Sa Li; Bin Na; Wen Ma; Tian-Min Xu

    2014-01-01

    We investigated the compensatory trends of mesiodistal angulation of first molars in malocclusion cases. We compared differences in the angulation of first molars in different developmental stages, malocclusion classifications and skeletal patterns. The medical records and lateral cephalogrammes of 1 403 malocclusion cases taken before treatment were measured to evaluate compensation of molar angulation in relation to the skeletal jaw. The cases were stratified by age, Angle classification and skeletal patterns. Differences in the mesiodistal angulation of the first molars were compared among the stratifications. We observed three main phenomena. First, angulation of the upper first molar varied significantly with age and tipped most distally in cases aged ,12 years and least distally in cases aged .16 years. The lower first molar did not show such differences. Second, in Angle Class II or skeletal Class II cases, the upper first molar was the most distally tipped, the lower first molar was the most mesially tipped, and opposite angulation compensation was observed in Class III cases. Third, in high-angle cases, the upper and lower first molars were the most distally tipped, and opposite angulation compensation was observed in low-angle cases. These data suggest that the angulation of the molars compensated for various growth patterns and malocclusion types. Hence, awareness of molar angulation compensation would help to adjust occlusal relationships, control anchorage and increase the chances of long-term stability.

  11. Assessment of the relationship between the maxillary molars and adjacent structures using cone beam computed tomography

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

    2012-09-15

    This study investigated the relationship between the roots of the maxillary molars and the maxillary sinus using cone beam computed tomography (CBCT), and measured the distances between the roots of the maxillary molars and the sinus floor as well as the thickness of the bone between the root and the alveolar cortical plate. The study sample consisted of 83 patients with normally erupted bilateral maxillary first and second molars. A total of 332 maxillary molars were examined using CBCT images. The vertical relationship of each root with the maxillary sinus was classified into four types on CBCT cross-sectional images. The distance between the sinus floor and root and the bone thickness between the root and alveolar cortical plate were measured. In the buccal roots of the maxillary molars, a root protruding into the sinus occurred most frequently. A root projecting laterally along the sinus cavity was most common in the palatal roots of the maxillary first molars. The mesiobuccal roots of the maxillary second molar were closest to the sinus. The mesiobuccal roots of the first molars were closest to the cortical plate. The relationship between the roots of the maxillary molars and the sinus differed between the buccal and palatal roots. A root protruding into the sinus occurred more frequent in the buccal roots of the maxillary molars. The mesiobuccal root of the maxillary second molar was closest to the maxillary sinus floor and farthest from the alveolar cortical plate.

  12. Blunt injury to the inferior gluteal artery: case report of a rare "near miss" event

    Chen Wei; Pan Jinshe; Smith Wade R; Liu Huaijun; Zhang Qi; Zhang Yingze

    2008-01-01

    Abstract Traumatic injuries of the inferior gluteal artery are rare, the majority of which are aneurysms due to sharp or blunt trauma. We report the rare case of a "near miss" event of a patient with an acute hemorrhagic mass in the right buttock caused by blunt trauma to the inferior gluteal artery without "hard" clinical signs of vascular injury. Despite the unusual presentation, diffuse injury of the inferior gluteal artery branches was diagnosed by ultrasonography and angiography. This ar...

  13. Modified distal shoe appliance for the loss of a primary second molar: a case report.

    Dhull, Kanika Singh; Bhojraj, Nandlal; Yadav, Shweta; Prabhakaran, Sheeja Devi

    2011-01-01

    Preservation of primary teeth until their normal exfoliation plays a crucial role in preventive and interceptive dentistry. Premature loss of the primary second molar prior to the eruption of the permanent first molar in the absence of the primary second molar can lead to mesial movement and migration of the permanent molar before and during its eruption. In such cases, an intra-alveolar type of space maintainer to guide the eruption of the permanent first molar is indicated. In certain cases, however, the conventional design is not practical. This paper describes a new design for distal shoe appliances in cases of primary second molar loss prior to the eruption of the permanent mandibular first molar.

  14. Exodoncia del tercer molar: Factores que determinan complejidad

    Ivan Manotas Arevalo

    2014-06-01

    Full Text Available ResumenUno de los procedimientos más frecuentes en el campo de la Cirugía Oral es la exodoncia, o extracción dental. La prevención y la promoción de hábitos saludables dentro de los que se cuenta la práctica del cepillado dental, uso de dentífricos, hilo dental y enjuagatorios bucales, además de visitas periódicas de control a especialistas y odontólogos generales e higienistas bucales ha conllevado a una reducción en la perdida de estructuras dentarias por causa de la caries y las periodontopatìas. Sin embargo se mantiene alto el número de exodoncias indicadas por falta de espacio en la estructura de los maxilares para la erupción dental, así como alteraciones en la posición y angulacion de los órganos dentales sobre su eje que impide una adecuada ubicación logrando que se indique su extracción. Dentro de la serie dental los órganos dentarios más frecuentemente afectados por este tipo de alteraciones son los terceros molares. También se mencionan que son esos mismos dientes los que acusan mayor grado de complejidad para realizar el procedimiento de exodoncia, y los que causan mayor grado de morbilidad posquirúrgica en el paciente, con un número mayor de complicaciones y su severidad, descritas en la literatura. (Duazary 2008; 141-147. Este artículo pretende analizar los factores que determinan complejidad en la exodoncia del tercer molar a partir de una revisión bibliografía y comparación de ésta.AbstractOne of the most frequent procedure used in the field of Oral Surgery is extracted, or tooth extraction. The prevention and promoting healthy habits in mind that the practice of brushing teeth, use of toothpastes, mouthwashes and dental floss mouth, in addition to regular monitoring visits to specialists and general dentists and oral hygiene has led to a reduction in the loss of structures caused by tooth decay and periodontal pathology. However remains high number of extractions indicated by lack of space in the

  15. Spiral CT in aplasia of the pre-renal inferior vena cava as a cause of phlebothrombosis from the femoral veins to the inferior vena cava; Spiral-CT einer Aplasie der praerenalen Vena cava inferior als Ursache einer Phlebothrombose von den Oberschenkelvenen bis in die Vena cava inferior

    Schweiger, U. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany); Schedel, H. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany); Thiede, U. [Deutsches Herzzentrum Berlin (Germany). Arbeitsgruppe Digitale Bildbearbeitung; Felix, R. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany)

    1994-12-31

    The case report focuses on the computed tomography of the thrombotic okklusion of the inferior vena cava, venae iliacae and femorales communes due to congenital interruption of the prerenal inferior vena cava. The embryology of the abnormality was discussed. (orig.) [Deutsch] Anhand einer Fallstudie wurden die Moeglichkeiten der computertomographischen Diagnostik bei einer durch Teilplasie der `praerenalen` Vena cava inferior hervorgerufenen Thrombose der Vv. femorales superficiales et profundae, der grossen Beckenvenen und der Vena cava inferior erlaeutert. In der Diskussion wurde auf die Embryologie der Missbildung eingegangen. (orig.)

  16. Cameriere's third molar maturity index in assessing age of majority.

    Galić, Ivan; Lauc, Tomislav; Brkić, Hrvoje; Vodanović, Marin; Galić, Elizabeta; Biazevic, Maria Gabriela Haye; Brakus, Ivan; Badrov, Jozo; Cameriere, Roberto

    2015-07-01

    Estimation of chronological age of an individual is one of the main challenges in forensic science. Legally to be able to treat a person as a minor or an adult, it is necessary to determine whether their age of majority (if they are older or younger than 18, in most countries). Methods for estimating age are especially important when an individual in question lacks personal documents or other means of identification. As the dental age differs in various populations, the aim of this study was to evaluate applicability of third molar method for assessing age of majority in Croatia. Cameriere's third molar maturity index (I3M) value of 0.08, measured by the open apices of the teeth, was verified in sample of 1336 panoramic images aged between 14 and 23 years. Chronological age gradually decreased as I3M increased in both genders. Males showed statistically significant advanced maturation when I3M was between 0.0 and 0.3 value. The results indicate that the sensitivity of the test for 0.08 value was 84.3% (95%CI 80.6%, 87.5%) for females and 91.2% (95%CI 88.7%, 93.1) for males. Specificity was 95.4% (95%CI 92.5%, 97.5%) and 91.9% (95%CI 88.8%, 94.3%). The proportions of accurately classified males were 88.8% and that of females 91.5%. The estimated post-test probabilities, of individuals, in other word the probability that a Croatian individual with an I3Mthird molar maturity index should be used as a determinant of the age of majority in Croatia.

  17. Incidence of cystic changes in impacted lower third molar

    Shridevi R Adaki

    2013-01-01

    Full Text Available Objective: To assess the incidence of cystic changes in the impacted lower third molar (ILTM in which the pericoronal (follicular space is less than 2.5 mm as measured from the radiograph. The relationship between the cystic changes and patient′s age, sex, and angular position and contact of ILTM with adjacent tooth was also evaluated. Materials and Methods: Follicular space less than 2.5 mm as measured from the panoramic radiograph was included in the study. A total of 73 tissue samples collected during the extraction ILTM were examined histopathologically. Then the data were analyzed for associations with age, sex, angular position, and contact of the ILTM with an adjacent tooth. Results: There were 37 male and 36 female patients, age ranging from 17 to 35 years (mean 23.95 years. Out of 73 specimens, 17 (23.3% showed cystic changes; among them 16 (22.1% showed dentigerous cysts and 1 (1.2% showed odontogenic keratocysts. Most of the cystic changes occurred in the 26-30 year age range. The cystic changes showed male predominance but could not gain statistical significance. The relationship between cystic changes and angular position was statistically significant (P < 0.05. Higher probability was found in distoangular positioned ILTM. The relationship between cystic changes and communication of ILTM with the second molar was not statistically significant. Conclusion: Incidence of cystic changes in ILTM justifies extraction of the impacted tooth associated with symptoms. The decision to extract or not to extract impacted third molar should be individualized, rather than generalized.

  18. [Molar incisor hypomineralization (MIH)--a literature review].

    Gotler, M; Ratson, T

    2010-04-01

    MIH was defined by Weerheijm (2001) as "hypomineralisation of systemic origin of 1-4 permanent first molars, frequently associated with affected incisors". The prevalence of MIH varies between 2.8% and 25%, dependent upon the study. At their sixth congress in 2003, The European Association of pediatric dentistry defined criteria for diagnosis of the phenomena. It included the presence of demarcated opacity, posteruptive enamel breakdown, atypical restoration, extracted molar due to MIH and unerupted teeth. According to the teeth involved and to the time of the crown formation, researches focused on environmental and systemic conditions as possible reasons for MIH.The etiologies were divided into five groups: Exposure to environmental contaminants, pre/peri and neonatal problems, exposure to fluoride, common childhood illnesses and medically compromised children. The clinical implications include highly sensitive teeth, difficulty to achieve adequate anesthesia, behavioral problems and anxiety, rapid progression of caries and the esthetic implications. A six step approach to management was described suggested: risk identification, early diagnosis, remineralization and desensitization, prevention of caries and posteruption breakdown, restorations and extractions and finally maintenance. Restoring an affected molar can vary from adhesive intra coronal restorations (resin composite is the material of choice) to extra coronal restorations (e.g. preformed metal crown). Esthetic solutions to affected incisors may include microabrasion (that shows little improvement) and resin composite or porcelain veneer. The key for a successful treatment is early diagnosis, intense follow up and usage of remineralizating agents as soon as the teeth erupt. There is still need for further research to clarify the etiological factors and improve the durability of restoration in affected teeth.

  19. Irregular Periapical Radiopacity in Mandibular Premolars and Molars

    S. Aravind Warrier

    2014-01-01

    Full Text Available Increased deposition of cementum is observed in a wide number of both benign and malignant conditions. Many cases are often diagnosed during routine examination as an incidental finding. Diagnosing correctly without confusing it with other similarly appearing lesions, thus avoiding subjecting the patient to unnecessary investigations and stress, is of prime importance. We report one such case, where the patient presented with the routine complaint of a painful tooth, during the investigation of which he was also diagnosed with hypercementosis affecting the mandibular second premolars and molars bilaterally. The literature review reveals that not many cases of hypercementosis are frequently reported.

  20. Pericoronitis, deep fascial space infections, and the impacted third molar.

    Litonjua, L S

    1996-01-01

    Patients consulting the Philippine General Hospital Dentistry Department for management of impacted mandibular third molars were studied for the presence of pericoronits and deep fascial space infections. 18% of total cases presented an infection, while 13% presented with pericoronitis. 11% presented with deep fascial infection of which 72% were secondary to pericoronitis. A radiographic evaluation showed the vertical angulation (68%) with the highest portion at or above the occlusal level (70%) associated the most with pericoronits. The potential of pericoronitis developing to a deep space infection should always be considered.

  1. Human age estimation combining third molar and skeletal development.

    Thevissen, P W; Kaur, J; Willems, G

    2012-03-01

    The wide prediction intervals obtained with age estimation methods based on third molar development could be reduced by combining these dental observations with age-related skeletal information. Therefore, on cephalometric radiographs, the most accurate age-estimating skeletal variable and related registration method were searched and added to a regression model, with age as response and third molar stages as explanatory variable. In a pilot set up on a dataset of 496 (283 M; 213 F) cephalometric radiographs, the techniques of Baccetti et al. (2005) (BA), Seedat et al. (2005) (SE), Caldas et al. (2007) and Rai et al. (2008) (RA) were verified. In the main study, data from 460 (208 F, 224 M) individuals in an age range between 3 and 26 years, for which at the same day an orthopantogram and a cephalogram were taken, were collected. On the orthopantomograms, the left third molar development was registered using the scoring system described by Gleiser and Hunt (1955) and modified by Köhler (1994) (GH). On the cephalograms, cervical vertebrae development was registered according to the BA and SE techniques. A regression model, with age as response and the GH scores as explanatory variable, was fitted to the data. Next, information of BA, SE and BA + SE was, respectively, added to this model. From all obtained models, the determination coefficients and the root mean squared errors were calculated. Inclusion of information from cephalograms based on the BA, as well as the SE, technique improved the amount of explained variance in age acquired from panoramic radiographs using the GH technique with 48%. Inclusion of cephalometric BA + SE information marginally improved the previous result (+1%). The RMSE decreased with 1.93, 1.85 and 2.03 years by adding, respectively, BA, SE and BA + SE information to the GH model. The SE technique allows clinically the fastest and easiest registration of the degree of development of the cervical vertebrae. Therefore, the choice of

  2. Restoration of Endodontically Treated Molars Using All Ceramic Endocrowns

    Roopak Bose Carlos

    2013-01-01

    Full Text Available Clinical success of endodontically treated posterior teeth is determined by the postendodontic restoration. Several options have been proposed to restore endodontically treated teeth. Endocrowns represent a conservative and esthetic restorative alternative to full coverage crowns. The preparation consists of a circular equigingival butt-joint margin and central retention cavity into the entire pulp chamber constructing both the crown and the core as a single unit. The case reports discussed here are moderately damaged endodontically treated molars restored using all ceramic endocrowns fabricated using two different systems, namely, CAD/CAM and pressed ceramic.

  3. Peripheral facial nerve paralysis after upper third molar extraction.

    Cakarer, Sirmahan; Can, Taylan; Cankaya, Burak; Erdem, Mehmet Ali; Yazici, Sinem; Ayintap, Emre; Özden, Ali Veysel; Keskin, Cengizhan

    2010-11-01

    Peripheral facial nerve paralysis (PFNP) after mandibular interventions has been reported in the literature. In most cases, paralysis begins immediately after the injection of the mandibular anesthesia, and duration of facial weakness is less than 12 hours. However, there are few documented cases of PFNP after maxillary dental or surgical procedures. A variety of mechanisms have been associated to PFNP, including viral reactivation, demyelination, edema, vasospasm, and trauma. The purpose of this presentation was to report a rare case of facial paralysis that occurred after an upper third molar extraction. The cause of the PFNP and the importance of the multidisciplinary approach in the management are emphasized.

  4. Forças de mordida relacionadas a próteses parciais removíveis inferiores Biting forces related to partially removable mandibular dentures

    Eduardo Piza PELLIZZER

    1998-10-01

    Full Text Available A pesquisa teve como objetivo determinar as forças de mordida de 73 indivíduos, por meio de um gnatodinamômetro. Os pacientes eram portadores de próteses parciais removíveis inferiores classes I, II ou III. A arcada antagonista era prótese, parcial removível ou fixa, ou total. Os resultados permitiram concluir que: as selas de extremidade livre, principalmente em suas posições extremas, conduziram a forças de mordida muito baixas; o envolvimento de prótese total, também, conduziu a forças de mordida baixas; o sexo masculino alcançou valores maiores que o feminino; com prótese parcial removível classe III, os dentes naturais molares e pré-molares desenvolveram valores maiores do que com classes I e II.The purpose of this study was to determine the biting forces of individuals wearing classes I, II or III partially removable mandibular dentures. Upper jaws presented fixed bridges, classes I, II or III partially removable dentures, or complete dentures. Measurements of biting forces were obtained by a gnathodynamometer. The conclusions were: classes I and II presented low biting forces, specially far from the last abutment tooth; when the opposite arcade was a complete denture, biting forces were low; males presented higher biting forces than females; natural molars and bicuspids presented higher biting forces with class III than with classes I or II.

  5. Leiomioma benigno metastatizante de veia cava inferior: rara complicação tardia de histerectomia Benign metastasizing leiomyoma of inferior vena cava: a rare condition following hysterectomy

    Marcos Filgueiras

    2008-08-01

    Full Text Available Large vessel tumors diagnosis is usually difficult. Benign metastasizing leiomyoma is a rare condition occurring inside peripheral vessels. There are few publications about this tumor inside inferior vena cava. A 54 years old female patient is presented with a previous hysterectomy for myomas. She complained of no specific symptoms 18 months after surgery. Computer tomography revealed a 7.5 x 3.5 x 4.0 cm mass at inferior vena cava and right psoas muscle. After surgical management and immunohistochemical screening biopsy, the diagnosis was benign metastasizing leiomyoma of inferior vena cava. The patient recovery was uneventful. Benign metastasizing leiomyoma of inferior vena cava is a very rare condition, and must be suspected in patients with primary leiomyosarcoma, especially in women previously submitted to hysterectomy for leiomyomatosis.

  6. Clinical comparative study between the use of lasers and conventional methods of diagnosis and treatment in deciduous teeth with presence of carious lesion; Estudo clinico comparativo entre o uso de lasers e metodos convencionais de diagnostico e tratamento em dentes deciduos da presenca de lesao cariosa

    Pulga, Fabiane Galvao

    2001-07-01

    The aim of this work was to evaluate the efficiency of deciduous tooth cavity preparation by the Er:YAG laser in comparison with the conventional burr rotary instrument. Besides, we have used the laser fluorescence technique (DIAGNOdent equipment) for diagnosis and compared it to the usual tactile and visual examination as well as X-ray diagnosis. For this purpose, 20 chronic occlusal carious deciduous molar teeth from children with the ages between 5 to 10 years old were selected. Selection was ma de according to visual inspection, X-ray periapical image and measures of the DIAGNOdent. For treatment the teeth were divided in two groups, 10 to be treated by the Er:YAG laser and 10 with conventional burr. For enamel, the laser energy used was in the interval from 200 to 300 mJ; for the dentine the range was from 100 mJ to 200 mJ. In both cases, the laser frequency was in the range from 2 to 4 Hz. The results have shown that the laser treatment was more accepted by the children than the conventional burro Clinical evaluation of the cavity preparation indicates that the Er:YAG laser treatment is recommend. The DIAGNOdent evaluation method was very effective for diagnosis of carious tissue for initial detection. After successful removal of the carious tissue, confirmed by visual inspection, the DIAGNOdent evaluation method was only effective for the treatment with conventional burro For evaluation of the tooth after cavity preparation with the Er:YAG laser, the measurements oscillate covering the full range of the equipment. Therefore, the use of the DIAGNOdent equipment is indicated only for initial caries diagnosis. (author)

  7. Prevalence of cervical enamel projection in human molars

    Maria Regina Lima de Souza

    2014-01-01

    Full Text Available Introduction : One of the developmental anomalies of dental enamel is cervical enamel projection (CEP. The aim of this study was to assess the prevalence of CEP in maxillary and mandibular human teeth. Materials and Methods: A total of 234 human molars obtained from the tooth bank of the State University of Amazonas were used in the present study. CEP was classified as Grade 0 (absence of projection, Grade I (discrete extension of cementoenamel junction toward the furcation, Grade II (closer to furcation without invasion, and Grade III (extending to the furcation area. The evaluation was performed using macroscopic inspection of teeth faces (buccal, lingual/palatal, mesial, and distal with at least one-third of the crown on each face. Results: It was found that 17.1% of the teeth evaluated had CEP, but neither of the projections occurred on the proximal faces. Higher prevalence of CEP was found on the buccal faces and the most commonly grade of CEP found was Grade I (10.3%. Conclusions: It may be concluded that CEP occurs more frequently in mandibular molars and its diagnosis is extremely important since these projections may difficult bacterial plaque removal, leading to an inflammatory process and unnecessary endodontic treatment.

  8. Supplemental root in a mandibular first molar: a rarity

    Poonam Mahajan

    2011-04-01

    Full Text Available Anatomic variations are common in human dentition. A clear understanding of these variations is very important for success of endodontic treatment. A dentist should be aware of these anatomic variations as this can affect the treatment outcome. A case of endodontic therapy is presented in which inability to locate an anatomically rare supplemental canal of a three rooted mandibular first molar resulted in treatment failure. A 21-year-old female reported with pain and swelling in relation to lower right first molar. An intra oral periapical radiograph revealed 3 roots; the first canal of the mesial root and a canal of one of the distal roots were found to be treated endodontically, which were infraobturated but the canal of the 2nd distal root had not been treated. The radiograph revealed periapical radiolucency and widening of periodontal space. Prior to starting the endodontic treatment the clinician must be aware of the anatomic variations in tooth pulp morphology and also the importance of preoperative radiographs cannot be underscored.

  9. Size of the lower third molar space in relation to age in Serbian population

    Zelić Ksenija

    2013-01-01

    Full Text Available Background/Aim. It is considered that the shortage of space is the major cause of the third molar impaction. The aim of this study was to establish the frequency of insufficient lower third molar eruption space in Serbian population, to question the differences in this frequency in the subjects of different age, to determine the influence of the lower third molar space (retromolar space size on third molar eruption, and to investigate a possible correlation between the size of gonial angle and the space/third molar width ratio. Methods. Digital orthopantomograms were taken from 93 patients divided into two groups: early adult (16-18 years of age and adult (18-26 patients. Retromolar space, mesiodistal third molar crown width, gonial angle and eruption levels were measured. Results. The space/third molar width in early adult subjects was smaller (p < 0.0001 and insufficient space was significantly more frequent (p = 0.0003 than in adult patients. Considerably more third molars erupted in case of enough space in both age groups (p < 0.0001. There was no difference between the means of gonial angle size in relations to the available space. Conclusions. The retromolar space/third molar width ratio is more favorable in adult subjects. Gonial angle is not in correlation with the retromolar space/third molar width ratio. [Projekat Ministarstva nauke Republike Srbije, br. 45005

  10. Comparison of Primary Molar Crown Dimensions with Stainless Steel Crowns in a Sample of Iranian Children.

    Afshar, Hossein; Kamali Sabeti, Arghavan; Shahrabi, Mahdi

    2015-01-01

    Background and aims. Due to anatomic variation in tooth anatomy between populations, this study compared the buccolingual (BL) and mesiodistal (MD) dimensions of primary molars with those of stainless steel crowns (SSCs) in anIranian population. Materials and methods. Impressions were taken from both dental arches of children, and casts were poured. Teeth with caries, restoration, hypoplasia or other dental anomalies were excluded. 216 primary molars were selected and divided into 4 groups of 54 each (maxillary and mandibular first and second primary molars). MD/BL dimensions were measured using a digital caliper with 0.01 mm precision on casts and SCCs (3M brand). Data were assessed using paired t-test, post hoc test and ANOVA. P < 0.05 was considered statistically significant. Results. The MD dimension of the lower first molar SSC and the BL dimension of the lower second molar SSC had the least difference with the corresponding values of the respective teeth. The MD dimension of the upper second molar SSC and the BL dimension of the upper first molar SSC had the greatest difference with the corresponding values in the respective teeth. Comparison of the two different brands of SSCs for the upper first molar revealed that both types had significant differences with the teeth in terms of both MD (P = 0.0) and BL (P = 0.0) dimensions. Conclusion. In the studied population, best adaptation was seen in second lower molars and the least adaptationswere seen in first and second upper molars.

  11. Generalizing Screen Inferiority--Does the Medium, Screen versus Paper, Affect Performance Even with Brief Tasks?

    Sidi, Yael; Ophir, Yael; Ackerman, Rakefet

    2016-01-01

    Screen inferiority in performance and metacognitive processes has been repeatedly found with text learning. Common explanations for screen inferiority relate to technological and physiological disadvantages associated with extensive reading on screen. However, recent studies point to lesser recruitment of mental effort on screen than on paper.…

  12. Simultaneous paresthesia of the lingual nerve and inferior alveolar nerve caused by a radicular cyst.

    Hamada, Yoshiki; Yamada, Hiroyuki; Hamada, Akiko; Kondoh, Toshirou; Suzuki, Mami; Noguchi, Kazuhide; Ito, Ko; Seto, Kanichi

    2005-10-01

    The inferior alveolar nerve is sometimes affected by periapical pathoses and mandibular cysts. However, mandibular intraosseous lesions have not been reported to disturb the lingual nerve. A case of simultaneous paresthesia of the right lingual nerve and the right inferior alveolar nerve is presented. The possible mechanisms of this extremely uncommon condition are discussed.

  13. Deep venous thrombosis in a young woman with hypoplastic inferior vena cava.

    Lavens, Matthias; Moors, Boudewijn; Thomis, Sarah

    2014-05-01

    We present a 33-year-old woman with deep venous thrombosis of the left iliac vein and the left lower limb. A computed tomography scan of her abdomen revealed a hypoplastic inferior vena cava and agenesis of the right kidney. Congenital anomalies of the inferior vena cava are uncommon and are sometimes an unrecognized cause of deep venous thrombosis.

  14. Advanced Techniques for Removal of Retrievable Inferior Vena Cava Filters

    Iliescu, Bogdan; Haskal, Ziv J., E-mail: ziv2@mac.com [University of Maryland School of Medicine, Division of Vascular and Interventional Radiology (United States)

    2012-08-15

    Inferior vena cava (IVC) filters have proven valuable for the prevention of primary or recurrent pulmonary embolism in selected patients with or at high risk for venous thromboembolic disease. Their use has become commonplace, and the numbers implanted increase annually. During the last 3 years, in the United States, the percentage of annually placed optional filters, i.e., filters than can remain as permanent filters or potentially be retrieved, has consistently exceeded that of permanent filters. In parallel, the complications of long- or short-term filtration have become increasingly evident to physicians, regulatory agencies, and the public. Most filter removals are uneventful, with a high degree of success. When routine filter-retrieval techniques prove unsuccessful, progressively more advanced tools and skill sets must be used to enhance filter-retrieval success. These techniques should be used with caution to avoid damage to the filter or cava during IVC retrieval. This review describes the complex techniques for filter retrieval, including use of additional snares, guidewires, angioplasty balloons, and mechanical and thermal approaches as well as illustrates their specific application.

  15. PERIPHERAL HEARING LOSS CAUSES HYPEREXCITABILITY OF THE INFERIOR COLLICULUS

    Sun Wei

    2013-01-01

    Growing evidence has been found to suggest that early development of the central auditory system is dependent on acoustic stimuli. Peripheral damage caused by noise exposure and ototoxic drugs can induce functional and anatomical changes along the auditory pathways. The inferior colliculus (IC) is a unique structure in the auditory system located between the primary auditory nuclei of the brainstem and the thala-mus. Damage to the IC inhibitory circuitry may affect central auditory processing and sound perception. Here, we review some of the striking electrophysiological changes in the IC that occur after noise exposure and ototoxic drug treatment. A common occurrence that emerges in the IC after peripheral damage is hyper-excitability of sound-evoked response. The hyperexcitability of the IC is likely related with reduced inhibi-tory response that requires normal peripheral inputs. Early age hearing loss can result in a long lasting in-creased susceptibility to audiogenic seizure which is related to hyperactivity in the IC evoked by loud sounds. Our studies suggest that hearing loss can cause increased IC neuron responsiveness which may be related to tinnitus, hyperacusis, and audiogenic seizure.

  16. Predictions Shape Confidence in Right Inferior Frontal Gyrus.

    Sherman, Maxine T; Seth, Anil K; Kanai, Ryota

    2016-10-05

    It is clear that prior expectations shape perceptual decision-making, yet their contribution to the construction of subjective decision confidence remains largely unexplored. We recorded fMRI data while participants made perceptual decisions and confidence judgments, manipulating perceptual prior expectations while controlling for potential confounds of attention. Results show that subjective confidence increases as expectations increasingly support the decision, and that this relationship is associated with BOLD activity in right inferior frontal gyrus (rIFG). Specifically, rIFG is sensitive to the discrepancy between expectation and decision (mismatch), and higher mismatch responses are associated with lower decision confidence. Connectivity analyses revealed expectancy information to be represented in bilateral orbitofrontal cortex and sensory signals to be represented in intracalcarine sulcus. Together, our results indicate that predictive information is integrated into subjective confidence in rIFG, and reveal an occipital-frontal network that constructs confidence from top-down and bottom-up signals. This interpretation was further supported by exploratory findings that the white matter density of right orbitofrontal cortex negatively predicted its respective contribution to the construction of confidence. Our findings advance our understanding of the neural basis of subjective perceptual processes by revealing an occipitofrontal functional network that integrates prior beliefs into the construction of confidence.

  17. Anterior Inferior Iliac Spine (AIIS) and Subspine Hip Impingement

    Carton, Patrick; Filan, David

    2016-01-01

    Summary Background Abnormal morphology of the anterior inferior iliac spine (AIIS) and the subspine region of the acetabular rim are increasingly being recognised as a source of symptomatic extra-articular hip impingement. This review article aims to highlight important differences in the pathogenesis, clinical presentation and management of extra-articular hip impingement from both the AIIS and subspine bony regions, and the outcome following surgical intervention. Methods A literature review was undertaken to examine the supporting evidence for AIIS and subspine hip impingement. A narrative account of the Author’s professional experience in this area, including operative technique for arthroscopic correction, is also presented. Results Abnormal morphology of the AIIS and subspine region has been classified using cadaveric, radiological and arthroscopic means; the clinical presentation and operative treatment has been documented in several case series studies. Dual pathology is often present - recognition and treatment of both intra- and extra-articular components are necessary for good postoperative outcome. Conclusions AIIS and sub-spine hip impingement should be considered as distinct pathological entities, which may also co-exist. Symptom relief can be expected following arthroscopic deformity correction with the treatment of concomitant intra-articular pathology. Failure to recognise and treat the extra-articular component may affect postoperative outcome. Level of evidence V. PMID:28066737

  18. The Quantitative Analysis to Inferior Oil with Electronic Nose Based on Adaptive Multilayer Stochastic Resonance

    Hong Men

    2011-09-01

    Full Text Available This study makes the three acryl glycerin polymers, oxidation three acryl glycerins, and low carbon number fatty acid as inferior oil feature index. Using double steady state stochastic resonance signal-to-noise ratio analysis methods make the quantitative analysis to inferior oil. This paper analyzes the stochastic resonance. Introduces the principle detection system structure based on adaptive multilayer stochastic resonance algorithm in inferior oil quantitativeanalysis; and make adaptive double stochastic resonance model and inferior oil as example, give the simulation and numerical analysis of this model of the system. The results show that the system can obtain more accurate quality the proportion of the inferior oil information. At the same time, this method can effectively solve the semiconductor gas sensors of the baseline drift problem. The method of stochastic resonance has a lot of application prospect in improving the system performance.

  19. Molar Dua Sulung Sebagai Salah Satu Pencetus Maloklusi Ditinjau Secara Radiografis (Laporan Kasus

    Gimawati Muljono

    2015-10-01

    Full Text Available Pengetahuan mengenai kehilangan dini gigi molar-2 sulung sebagai penyebab miringnya gigi molar-1 tetap dan berkurangnya ruangan tempat erupsi gigi kaninus dan premolar, sudah lama diketahui. Dari penelusuran pustaka ternyata masih banyak faktor yang efeknya sama dan penyebabnya gigi molar-2 sulung yang kurang disadari dan belum mendapat perhatian sepenuhnya. Faktor-faktor tersebut adalah : anatomis, karies, ankilose, dan iatrogenik, yang efek lanjutnya bahkan dapat sampai menimbulkan maloklusi. Makalah ini akan mengemukakan suatu kasus, sehubungan dengan keadaan gigi molar-2 sulung yang dapat menjadi salah satu faktor penyebab maloklusi ditinjau secara radiografis dengan foto panoramik dan cephalometri. Ramalan maloklusi gigi geligi tetap dapat dilihat dari proyeksi gambar pergeseran gigi-gigi, kontak oklusi bidang terminal permukaan distal mahkota gigi molar-2 sulung, hubungan kontak gigi molar-1 tetap di foto pasien.

  20. Correlation of acute pericoronitis and the position of the mandibular third molar.

    Leone, S A; Edenfield, M J; Cohen, M E

    1986-09-01

    Acute pericoronitis is a painful, debilitating infection that is most commonly found among young adults with erupting mandibular third molars. Prophylactic removal of third molars to prevent this disease has been advocated, but this procedure requires an accurate description of the third molar at highest risk for this infection. Clinical and radiographic measurements were compared in 25 diseased subjects and 109 normal subjects. Of 10 variables significantly related to the presence of acute pericoronitis, stepwise discriminant analysis selected 4 variables that produced a canonical correlation coefficient of 0.71. In clinical terms, these variables described the tooth at highest risk for acute pericoronitis as a fully erupted, vertical mandibular third molar that is in contact with the adjacent second molar, at or above the occlusal plane, and partially encapsulated by soft or hard tissues. Prophylactic treatment of these third molars is highly recommended.

  1. Etiology, Classification and Management of Ectopic Eruption of Permanent First Molars.

    Hsiao, Chu-Chun; Boynton, James R

    2016-01-01

    Ectopic eruption of a permanent tooth involves abnormal resorption of a portion or all of the adjacent primary tooth. Among the most commonly ectopically erupted teeth are the permanent first molars. Ectopically erupting molars may require intervention to allow for full eruption, or they may spontaneously self-correct and erupt into occlusion. Decisions regarding the necessity of intervention, its ideal timing, and intervention type are multifactorial. Treatment options for the ectopically erupting permanent first molar include the elastomeric separator, brass wire, pre-fabricated clip separator, custom made appliances (Humphrey appliance, Halterman appliance), or extraction of the primary molar. Early intervention when indicated can ensure proper full eruption of the permanent first molar and prevent mesial angulation, arch perimeter loss, tooth impaction and ankylosis. Two cases are described that manage ectopic eruption of the permanent first molar.

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

    Darwin Vaz de Lima

    2013-04-01

    Full Text Available OBJECTIVE: This study aimed to evaluate the stability of molar relationship after non-extraction treatment of Class II malocclusion. METHODS: The sample comprised 39 subjects (16 females, 23 males with initial Class II malocclusion treated with no extractions, using fixed appliances. Mean age at the beginning of treatment was 12.94 years, at the end of treatment was 15.14 years and at post-retention stage was 21.18 years. Mean treatment time was 2.19 years and mean time of post-treatment evaluation was 6.12 years. To verify the influence of the severity of initial Class II molar relationship in stability of molar relationship, the sample was divided into two groups, one presenting a ½-cusp or ¾-cusp Class II molar relationship, and the other with full-cusp Class II molar relationship. In dental casts from initial, final and postretention stages, molar, first and second premolars and canine relationships were measured. Data obtained were analyzed by dependent ANOVA, Tukey and Pearson's correlation tests, as well as independent t test between the two groups divided by severity of initial molar relationship. RESULTS: There was a non-statistically significant 0.12 mm relapse of molar relationship. The initial severity of Class II molar relationship was not correlated to relapse in the post-retention period. When compared, the two groups showed no difference in relapse of molar relationship. CONCLUSION: It was concluded that correction of Class II molar relationship is stable and initial severity does not influence relapse of molar relationship.

  3. Partial molar volume of L-Valine in water under high pressure

    Sawamura, Seiji

    2013-06-01

    Partial molar volume of L-valine in water was estimated up to 400 MPa from pressure coefficient of the solubility of the solute and molar volume of solid valine. The former was measured in a previous paper and the latter was measured in this article using a piston-cylinder typed cell. The partial molar volume increased with pressure and a maximum was observed around 250 MPa. It was compared with other amino acids.

  4. Independent and Confluent Middle Mesial Root Canals in Mandibular First Molars: A Report of Four Cases

    Mohanavelu Deepalakshmi

    2012-01-01

    Full Text Available Mandibular molars demonstrate considerable variations with respect to number of roots and root canals. The possibility of additional root canals should be considered even in teeth with a low frequency of abnormal root canal anatomy. This paper discusses the endodontic management of the rare anatomical complexity middle mesial canals in mandibular first molar and also serves to remind the clinicians that such anatomical variations should be taken into account during the endodontic treatment of the mandibular molars.

  5. Fate of third molar in line of mandibular angle fracture - Retrospective study

    Preetha Balaji

    2015-01-01

    Conclusion: The present study fails to identify any concrete factors that would predict the failure of the retained third molar that were involved in the line of mandibular fractures. The proof presented here, especially with low complication rates indicate that all impacted third molar along the line of fracture be removed and unless necessary, the partially erupted teeth would also be extracted. In such a situation, the rate of infection and survival of the third molar would have been entirely different.

  6. The origin of the lower fourth molar in canids, inferred by individual variation

    Masakazu Asahara

    2016-01-01

    Background An increase in tooth number is an exception during mammalian evolution. The acquisition of the lower fourth molar in the bat-eared fox (Otocyon megalotis, Canidae, Carnivora, Mammalia) is one example; however, its developmental origin is not clear. In some canids (Canidae), individual variation exist as supernumerary molar M4. This study focuses on the acquisition of the lower fourth molar in canids and proposes that the inhibitory cascade model can explain its origin. Methods Occl...

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

    Jung, Yun-Hoa; Cho, Bong-Hae

    2013-01-01

    Purpose The purpose of this study was to determine the prevalence of missing and impacted third molars in people aged 25 years and above. Materials and Methods The study sample of 3,799 patients was chosen randomly from patients who visited Pusan National University Dental Hospital and had panoramic radiographs taken. The data collected included presence and impaction state, angulation, and depth of impaction of third molars, and radiographically detected lesions of third molars and adjacent ...

  8. Age estimation using development of third molars in South Indian population: A radiological study

    Priyadharshini, K. Indra; Idiculla, Jose Joy; Sivapathasundaram, B.; Mohanbabu, V.; Augustine, Dominic; Patil, Shankargouda

    2015-01-01

    Aim: To assess the estimation of chronological age based on the stages of third molar development following the eight stages (A–H) method of Demirjian et al. in Chennai population of South India. Materials and Methods: A sample consisting of 848 individuals (471 males and 377 females) aged between 14 and 30 years was randomly selected for the clinical evaluation and 323 orthopantomograms with clinically missing third molars were taken for radiological evaluation using Demirjian's method from a Chennai population of known chronological age and sex. Statistical analysis was performed using Pearson's Chi-square test and mean values were compared between the study groups using t-test or analysis of variance (ANOVA) followed by Tukey's highly significant difference (HSD). In the present study, P < 0.05 was considered as the level of significance. Results: The results showed that the mean age of having clinically completely erupted maxillary third molars was 22.41 years in male subjects and 23.81 years in female subjects and that of mandibular third molars was 21.49 years in male subjects and 23.34 years in female subjects. Mandibular third molars were clinically missing more often in females than in males. Eruption of mandibular third molars was generally ahead of the emergence of maxillary third molars into the oral cavity. Third molar development between male and female subjects showed statistically significant differences at calcification stage F and stage G in maxillary third molars and stage F in mandibular third molars (P < 0.05). Conclusion: There are differences indicating that maxillary and mandibular third molar eruption reached Demirjian's formation stages earlier in males than in females. It is suggested that in future studies, to increase the accuracy of age determination, indications of sexual maturity and ossification should also be evaluated in addition to third molar mineralization. PMID:25984465

  9. Single implant in the mandibular molar region of edentulous patient.

    Zhai, Jun-Jiang; Wen, Cai; Teng, Ming-Hua; Liang, Xing

    2013-09-01

    Implant-retained overdentures are a valid treatment option for edentulous patients, especially for patients with severe alveolar ridge atrophy. A central single implant is considered adequate to retain an overdenture in the edentulous mandible. However, for some patients, there is no sufficient bone height, or width in the interforaminal region of the mandible for insertion of the implant. This case report illustrates that the insertion of a single implant in the mandibular molar region might stabilize the prosthesis, and might improve the oral health-related quality of life and chewing function. A Locator attachment was used in this case to retain the overdenture. The one-year clinical results are promising. However, long-term clinical results and randomized clinical trials are needed before this method can be widely used in clinical application.

  10. Restoration of primary molars using a new "compomer" material.

    Swift, E J; Vann, W F

    1995-10-01

    The primary advantages of glass ionomer restorative materials are adhesion to tooth structure and release of fluoride. A new material has been recently introduced for the restoration of cervical lesions and Class I defects in primary teeth. The material combines the properties of glass ionomers with the advantages of a single-component, light-activated composite resin and is known as a "compomer". This new material contains two resins, instead of the acidic polymers found in conventional glass ionomers. The restorative material releases fluoride and can be infected directly into the cavity. With its own bonding agent, the compomer offers a simple and relatively rapid technique. The learning objective of this paper is to describe the utilization of the new restorative material in conjunction with a bonding agent to restore conservative cavity preparations in primary molars. Two clinical cases are used to illustrate the presentation.

  11. Indirect pulp capping in primary molar using glass ionomer cements

    Murtia Metalita

    2014-12-01

    Full Text Available Background: Indirect pulp capping in primary teeth, however, is more rarely conducted than permanent teeth, since it thought to have low impact and most suggestion is for taking caries lesion aggressively on primary teeth. Purpose: The study was aimed to evaluate the subjective complaint, clinical symptom, and radiographic appearance of indirect pulp capping treatment using glass ionomers cements in primary molar. Methods: Sixteen children in range of age 6 to 8 years old, who visited Clinic of Pediatric Dentistry Universitas Airlangga Dental Hospital, Surabaya Indonesia, were the subject of study. They had one occlusal dental caries on one side of maxillary or mandibular primary molar with the diagnose of pulpitis reversible. The experimental group, had indirect pulp capping treatment with glass ionomer cements (GC Fuji VII®, while the control group, had indirect pulp capping treatment with calcium hydroxide (Metapaste. Each group was filled with GC Fuji IX® as permanent restoration. After one week, one month, and three months later, the observations were made on subjective complaint, clinical symptom, and radiographic appearance. Results: The results showed no subjective complaint such as pain or problem on mastication; no negative clinical symptoms such as pain on palpation, gingivitis or periodontitis, and abnormal tooth mobility; no negative radiographic appearance such as pathological apical radioluscency, internal or external resorbtion, and change of ligament periodontal widthafter the treatment. Conclusion: The study suggested that indirect pulp capping treatment using glass ionomer cement materials on primary teeth might be considered to be the treatment choice.Latar belakang: Indirect pulp capping pada gigi sulung lebih jarang dilakukan dibandingkan gigi permanen, karena dianggap memiliki dampak yang rendah dan sebagian besar menyarankan untuk mengambil lesi karies secara agresif pada gigi sulung. Tujuan: Penelitian ini bertujuan

  12. Calculations of Molar Fractions of the IPR C78 Fullerenes

    Uhlík, Filip; Slanina, Zdeněk

    2002-10-01

    There are five isolated-pentagon-rule (IPR) satisfying isomers of C78. In contradiction to theoretical predictions, only three isomers were observed in experiments and the fourth one was not identified until very recently. In this work we calculate structural and energetic data of the five IPR C78 fullerenes, namely we optimized their geometries with the B3LYP density-functional method using the standard 4-31G basis set (B3LYP/4-31G), calculated separation energies at the B3LYP/6-311G* level (B3LYP/6-311G*//B3LYP/4-31G), estimated energies of low lying electronic states with the ZINDO semiempirical method and calculated harmonic vibrational frequencies with the semiempirical SAM1 method. From the obtained data we constructed chirality respecting isomeric partition functions and evaluated molar fractions in the equilibrium isomeric mixture for a wide temperature interval.

  13. Molar Volume Analysis of Molten Ni-Al-Co Alloy by Measuring the Density

    XIAO Feng; FANG Liang; FU Yuechao; YANG Lingchuan

    2004-01-01

    The density of molten Ni-Al-Co alloys was measured in the temperature range of 1714~1873K using a modified pycnometric method, and the molar volume of molten alloys was analyzed. The density of molten Ni-Al-Co alloys was found to decrease with increasing temperature and Co concentration in alloys. The molar volume of molten Ni-Al-Co alloys increases with increasing Co concentration in alloys. The molar volume of molten Ni-Al-Co alloys shows a negative deviation from the linear molar volume.

  14. Prevalence and Pattern of Third Molar Impaction; A retrospective study of radiographs in Oman

    Samira M. Al-Anqudi

    2014-08-01

    Full Text Available Objectives: The aim of this retrospective study was to investigate the prevalence and pattern of third molar impaction in patients between 19‒26 years old attending Sultan Qaboos University Hospital (SQUH in Muscat, Oman. Methods: The study reviewed 1,000 orthopantomograms (OPGs of patients attending the Oral Health Department of SQUH between October 2010 and April 2011. Patients were evaluated to determine the prevalence of third molar impaction, angulation, level of eruption and associated pathological conditions. Results: Of the study population, 543 (54.3% OPGs showed at least one impacted third molar. The total number of impacted molars was 1,128. The most common number of impacted third molars was two (41%. The most common angulation of impaction in the mandible was the mesioangular (35% and the most common level of impaction in the mandible was level A. Of the 388 bilateral occurrences of impacted third molars, 377 were in the mandible. There was no significant difference in the frequency of impaction between the right and left sides of both jaws. Pathological conditions associated with impacted lower third molars were found in 18%, of which 14% were associated with a radiographic radiolucency of more than 2.5 mm, and 4% of impacted lower third molars were associated with dental caries. Conclusion: This study found that more than half of Omani adult patients ranging in age from 19‒26 years had at least one impacted third molar.

  15. Periodontal considerations in the use of bonds or bands on molars in adolescents and adults.

    Boyd, R L; Baumrind, S

    1992-01-01

    This longitudinal study compared the periodontal status of bonded and banded molars in 20 adult and 40 adolescent patients before, during and after treatment with fixed orthodontic appliances. Plaque accumulation (measured by the Plaque Index), gingival inflammation (measured by the Gingival Index and the bleeding tendency), and pocket depth were assessed by one examiner at sites along the mesio-buccal line angle of the maxillary right first molar and the mandibular left first molar. Assessments were made immediately prior to the placement of fixed appliances (pretreatment), at 1, 3, 6, 9, 12 and 18 months after appliances were placed; and 3 months after appliances were removed (posttreatment). Loss of attachment between the pretreatment and posttreatment visits also was determined. At pretreatment, no significant differences were found in gingival inflammation between maxillary and mandibular banded and bonded molars. During treatment, both maxillary and mandibular banded molars showed significantly (p less than 0.05) greater gingival inflammation and plaque accumulation than did bonded molars. Three months after appliance removal, the maxillary molars that had been banded continued to show significantly more gingival inflammation and loss of attachment than did the maxillary molars that had been bonded. When all banded and bonded teeth were grouped by patient age, mean values for plaque accumulation and gingival inflammation in the maxillary molar regions were significantly greater for adolescents than for adults.

  16. Do antibiotics reduce the frequency of surgical site infections after impacted mandibular third molar surgery?

    Susarla, Srinivas M; Sharaf, Basel; Dodson, Thomas B

    2011-11-01

    Surgical removal of impacted third molars remains the most common procedure performed by oral and maxillofacial surgeons. Given the abundance of host bacteria within the operative sites, surgical site infections are among the most common complications of third molar removal, with an estimated frequency of 1% to 30%. In this setting, significant controversy has surrounded the use of prophylactic antibiotics in the surgical management of impacted third molars. This article provides a comprehensive review of the available data on antibiotic prophylaxis in impacted third molar surgery and offers specific recommendations on antibiotic use.

  17. Unusual anatomical detection of a third molar in the infratemporal fossa.

    Corega, C; Vaida, L; Festila, D; Bertossi, D

    2013-01-01

    Third molar presence in the infratemporal fossa is a rare event and it has been reported previously only two times in the literature, except for the cases which arise from complications occurring during the extraction of the impacted upper third molar. Due to the presence of important vessel bundles and nerves in this area, third molar removal requires a correct surgical management in order to avoid many possible serious side effects. We report an unusual case of upper third molar detected in the infratemporal fossa, which has been thoroughly investigated radiologically and removed through a safe surgical approach.

  18. The evolution of molar occlusion in the Cercopithecidae and early Catarrhines.

    Kay, R F

    1977-03-01

    Those Eocene prosimians which are possible catarrhine ancestors have four blade-like crests on each lower molar. Each crest shears in sequence across two upper molar crests. Occluding crests are concavely curved to hold the foods being sheared. Each of two medial lower molar crests bordering the principal crushing surface shear past single upper molar crests at about the same time the lateral lower molar crests contact the second rank of upper molar crests. Grinding and crushing areas are restricted to hypoconid, trigonid, and protocone surfaces. Oligocene catarrhine molars have increased crushing-grinding capacities and maintained but modify their shearing. As the crushing surface of the protocone expands and a crushing hypocone is added, the "second rank" upper molar shearing crests are functionally reduced. At the same time medial crests are increasingly emphasized so that the total shearing capacity remains virtually unchanged. Marginal shearing blades are straight edged; leading edges of occluding blades are set at different angles to the occlusal plane so that blades contact at only one point at any given time. Early Primates have separate crushing basins surrounded by shearing blades. Catarrhines tend to link explanding crushing surfaces anteroposteriorly into a continuous surface between all molars. A cladistic analysis based on both new and previously recognized characters indicates that: 1. Apidium may be more closely related to Aegyptopithecus than to Parapithecus; 2. cercopithecids are derived from a Parapithecus-related stock; 3. Oreopithecus could equally well have come from an Apidium or Aegyptopithecus stock.

  19. Assessment of maxillary third molars with panoramic radiography and cone-beam computed tomography

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

    2015-12-15

    This study investigated maxillary third molars and their relation to the maxillary sinus using panoramic radiography and cone-beam computed tomography (CBCT). A total of 395 maxillary third molars in 234 patients were examined using panoramic radiographs and CBCT images. We examined the eruption level of the maxillary third molars, the available retromolar space, the angulation, the relationship to the second molars, the number of roots, and the relationship between the roots and the sinus. Females had a higher frequency of maxillary third molars with occlusal planes apical to the cervical line of the second molar (Level C) than males. All third molars with insufficient retromolar space were Level C. The most common angulation was vertical, followed by buccoangular. Almost all of the Level C molars were in contact with the roots of the second molar. Erupted teeth most commonly had three roots, and completely impacted teeth most commonly had one root. The superimposition of one third of the root and the sinus floor was most commonly associated with the sinus floor being located on the buccal side of the root. Eruption levels were differently distributed according to gender. A statistically significant association was found between the eruption level and the available retromolar space. When panoramic radiographs showed a superimposition of the roots and the sinus floor, expansion of the sinus to the buccal side of the root was generally observed in CBCT images.

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

    A V Rajesh Ebenezar

    2013-01-01

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

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

    Mírian Aiko Nakane Matsumoto

    2010-12-01

    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

  2. Non-inferiority clinical trials: Practical issues and current regulatory perspective

    Sandeep K Gupta

    2011-01-01

    Full Text Available Non-inferiority clinical trials are being performed with an increasing frequency now-a-days, because it helps in finding a new treatment that have approximately the same efficacy, but may offer other benefits such as better safety profile. Non-inferiority clinical trials aim to demonstrate that the test product is no worse than the comparator by more than a pre-specified small amount. There are several fundamental differences between non-inferiority and superiority trials. Some practical issues concerning the non-inferiority trials are assay sensitivity, choice of the non-inferiority margin, sample size estimation, choice of active-control, and analysis of non-inferiority clinical trials. For serious infections such as hospital-acquired bacterial pneumonia/ventilator-associated bacterial pneumonia, community-acquired bacterial pneumonia, and acute bacterial skin and skin structure infections, the United States Food and Drug Administration (US FDA has recently recommended that it is possible to define a reliable and consistent estimate of the efficacy of active treatment relative to placebo from available data, which can serve as the basis for defining a new inferiority margin for an active-controlled, non-inferiority trial. But for some indications with a high rate of resolution without antibacterial drug therapy such as acute bacterial sinusitis (ABS, acute bacterial exacerbation of chronic bronchitis (ABECB, and acute bacterial otitis media (ABOM, the US FDA has recommended that the available data will not support the use of a non-inferiority design and other trial designs (i.e., superiority designs should be used to provide the evidence of effectiveness in these three indications.

  3. A extração de segundos molares superiores para o tratamento da Classe II Extraction of upper second molars for treatment of Angle Class II malocclusion

    Maurício Barbieri Mezomo

    2010-06-01

    Full Text Available Este trabalho tem por objetivo apresentar uma abordagem alternativa para o tratamento ortodôntico das más oclusões de Classe II. Através de uma revisão da literatura, verificou-se que a extração de segundos molares superiores demonstrou ser uma alternativa viável para o tratamento desse tipo de má oclusão. Essa opção terapêutica possibilita maior rapidez na distalização dos primeiros molares com menor necessidade de cooperação por parte do paciente. Porém, a análise do grau de formação, posição intraóssea e morfologia do terceiro molar deve ser cuidadosamente realizada para proporcionar o correto posicionamento do mesmo no lugar do segundo molar extraído. Dois casos clínicos apresentarão a sequência do diagnóstico e tratamento com essa mecânica, exibindo resultados adequados dos pontos de vista funcional e estético.The purpose of this article is to present an alternative approach to the orthodontic treatment of Angle Class II malocclusion. According to a literature review it was observed that the extraction of upper second molars has proven to be a viable alternative for the treatment of this type of malocclusion. This therapeutic option enables faster first molar retraction and requires less patient compliance. However, the level of development, intraosseous position and morphology of the third molar should be carefully evaluated to ensure its correct positioning in place of the extracted second molar. Two clinical case reports will demonstrate that the sequence of diagnosis and treatment used with this mechanics yields satisfactory functional and aesthetic results.

  4. Corticosteroids use in controlling pain, swelling and trismus after lower third molar surgery use in controlling pain, swelling and trismus after lower third molar surgery

    2011-01-01

    Objectives: A study is made of corticosteroid use in controlling pain, swelling and trismus after lower third molar surgical removal. Material and methods: A Medline search and review was made of all randomized and controlled clinical trials on the effects of corticosteroids upon pain, swelling and trismus after lower third molar surgery. The review was limited to those studies published in the last 10 years. Of the 20 initially considered articles, 6 were finally excluded....

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

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

    2013-12-15

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

  6. [Massive inferior vena cava thrombosis in a patient with autosomal dominant polycystic hepatorenal disease].

    Peces, R; Gil, F; Costero, O; Pobes, A

    2002-01-01

    We report a 68-year-old man with autosomal dominant polycystic kidney disease, who developed multiple venous thromboses (inferior vena cava, left renal vein and iliofemoral veins) caused by local compression of the intrahepatic inferior vena cava by hepatic cysts. To our knowledge this is the first reported case of inferior vena cava thrombosis caused by hepatic cysts compression. Doppler ultrasound, computed tomography, and magnetic resonance imaging were effective in documenting the venous thromboses and the underlying lesions non-invasively. Long-term anticoagulation was an efficient and safe treatment.

  7. Language outcomes after resection of dominant inferior parietal lobule gliomas.

    Southwell, Derek G; Riva, Marco; Jordan, Kesshi; Caverzasi, Eduardo; Li, Jing; Perry, David W; Henry, Roland G; Berger, Mitchel S

    2017-01-06

    OBJECTIVE The dominant inferior parietal lobule (IPL) contains cortical and subcortical regions essential for language. Although resection of IPL tumors could result in language deficits, little is known about the likelihood of postoperative language morbidity or the risk factors predisposing to this outcome. METHODS The authors retrospectively examined a series of patients who underwent resections of gliomas from the dominant IPL. Postoperative language outcomes were characterized across the patient population. To identify factors associated with postoperative language morbidity, the authors then compared features between those patients who experienced postoperative deficits and those who experienced no postoperative language dysfunction. RESULTS Twenty-four patients were identified for analysis. Long-term language deficits occurred in 29.2% of patients (7 of 24): 3 of these patients had experienced preoperative language deficits, whereas new long-term language deficits occurred in 4 patients (16.7%; 4 of 24). Of those patients who exhibited preoperative language deficits, 62.5% (5 of 8) experienced long-term resolution of their language deficits with surgical treatment. All patients underwent intraoperative brain mapping by direct electrical stimulation. Awake, intraoperative cortical language mapping was performed on 17 patients (70.8%). Positive cortical language sites were identified in 23.5% of these patients (4 of 17). Awake, intraoperative subcortical language mapping was performed in 8 patients (33.3%). Positive subcortical language sites were identified in 62.5% of these patients (5 of 8). Patients with positive cortical language sites exhibited a higher rate of long-term language deficits (3 of 4, 75%), compared with those who did not (1 of 13, 7.7%; p = 0.02). Although patients with positive subcortical language sites exhibited a higher rate of long-term language deficits than those who exhibited only negative sites (40.0% vs 0.0%, respectively), this

  8. Surgical treatment for ruptured anterior inferior cerebellar artery aneurysms

    TONG Xiao-guang

    2013-03-01

    Full Text Available Background Anterior inferior cerebellar artery (AICA aneurysm is an extremely raretumor, which can cause severe results after ruptured. This article retrospectively analyzed the clinical symptoms, imaging manifestations, surgical approaches, endovascular therapy and postoperative outcomes of 12 cases with AICA aneurysms, so as to provide reference for clinical practice. Methods Clinical data of patients with AICA aneurysms, who were treated in our hospital between June 2004 and June 2012, were carefully collected and studied. Glasgow Outcome Scale (GOS scores were used to evaluate the patients' living status. Results There were 12 patients (the average age was 54 years old with 13 ruptured aneurysms, accounting for 0.19% of all aneurysms (6467 cases treated in the same period. CT showed simple subarachnoid hemorrhage (SAH in 6 patients, simple ventricular hemorrhage in 1 patient and SAH complicated with ventricular hemorrhage in 5 patients. According to Hunt-Hess Grade, 2 patients were classified as Grade Ⅰ; 7 were Grade Ⅱ; 3 were Grade Ⅲ. Digital subtraction angiography (DSA showed there were 10 saccular aneurysms and 3 fusiform aneurysms. Three aneurysms were located in the proximal segment of AICA (the junction of AICA and basilar artery, 3 premeatal segment (first bifurcation of AICA, 3 meatal and 4 postmeatal. The mean diameter was 3.90 mm. Three patients with 4 aneurysms were treated with microsurgery, of which clipping was carried out in 2 patients with 3 aneurysms and trapping in 1 case. Other 9 patients were treated with endovascular therapy, of which 2 cases underwent coil embolization, 3 stent-assisted coil, and 4 parent artery occlusion (PAO. Postoperative complications included facial paralysis (1 case, dysphagia and coughing when drinking (1 case and contralateral hemianopia in both eyes (1 case. Follow-up was available in all of these cases for a mean of 36.41 months, with GOS scores 3 in 1 case, 4 in 2 cases and 5 in 9

  9. Tuberculosis pulmonar de campos inferiores Lower lung field tuberculosis

    Alejandra González

    2010-10-01

    Full Text Available La tuberculosis (TB que compromete sólo los campos pulmonares inferiores (TBCI es poco frecuente en el adulto y en general está asociada a alguna causa de inmunodepresión. El objetivo de nuestro trabajo fue determinar la incidencia de TBCI en nuestra población y comparar sus características respecto de la TB pulmonar de localización habitual. Se estudiaron en forma retrospectiva en el período de 2004 a 2008, 42 pacientes con TBCI que fueron comparados con 84 pacientes con TB pulmonar de localización habitual (grupo control. Se excluyeron pacientes con HIV. La TBCI representó el 6% del total de TB pulmonar. No se encontraron diferencias significativas en cuanto a edad, sexo, presencia de cavidades en la radiografía, días de evolución y nivel de albúmina. La TBCI tuvo significativamente mayor proporción de comorbilidades (p Tuberculosis (TB that affects lower lung fields (LLFTB is infrequent in the adult population and is generally associated with immunodeficiency. The objective of our study was to determine the incidence of LLFTB in our patients population and compare the characteristics of these patients with those who presented TB of typical pulmonary localization. We studied 42 patients with LLFTB retrospectively between 2004 and 2008 and compared them to 84 patients with TB of typical localization (control group. HIV-positive patients were excluded. LLFTB represented 6% of the pulmonary TB cases. No significant differences were found with respect to age, sex, the presence of cavities in chest x-rays, days of evolution, and albumin levels. LLFTB had a significantly greater proportion of comorbilities (p < 0.001, the presence of condensation (p < 0.001, and unilateral involvement (p < 0.001, with a higher number of hospital admissions (p = 0.02. The observation that only 16 of the 42 patients with LLFTB (38% had a notable comorbility is important. Thus, LLFTB can be present without associated comorbilities and must be suspected in

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

    Markvart, Merete; Darvann, Tron Andre; Larsen, Per

    2012-01-01

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

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

    Giacomo D′Orlandi

    2014-01-01

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

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

    Giacomo D′Orlandi; Lorenzo Raguzzi; Efisio Defraia; Felicita Pierleoni

    2014-01-01

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

  13. Modified distal shoe appliance for premature loss of multiple deciduous molars: a case report.

    Bhat, Prasanna Kumar; K, Navin H; Idris, Mohammed; Christopher, Pradeep; Rai, Niharika

    2014-08-01

    Preservation of the primary dentition until the normal time of exfoliation is one of the most important factor involved in preventive and interceptive dentistry. The premature loss of second primary molar before the eruption of permanent first molar can create a significant arch space/tooth size discrepancy. Distal shoe space maintainer is a valuable part of the Paediatric Dentist's armamentarium in those cases where the second primary molar is prematurely lost and it helps to guide the first permanent molar into place. Conventional design poses various limitations in cases of premature loss of multiple deciduous molars. Thus, it is required to modify the conventional designs according to the needs of the patient. This case report describes an innovative modification of distal shoe appliance in cases of premature loss of multiple deciduous molars. In the present case, modification of distal shoe space maintainer was advocated because of inadequate abutments caused due to multiple loss of deciduous molars. Bilateral design of distal shoe was planned for unilateral loss of deciduous molars.

  14. Radiological age estimation: based on third molar mineralization and eruption in Turkish children and young adults.

    Karadayi, Beytullah; Kaya, Ahsen; Kolusayın, Melek Ozlem; Karadayi, Sükriye; Afsin, Hüseyin; Ozaslan, Abdi

    2012-11-01

    Radiographic evaluation of mineralization and eruption stages of third molars using dental panoramic radiographies can be an efficient tool for chronological age estimation in both forensic sciences and legal medicine. The third molar tooth is utilized for dental age estimation about the age span of 15-23 years because it represents the only tooth still in development. The aim of this study is to obtain and analyze data regarding third molar development and eruption in Turkish population for dental age estimation. A total of 744 dental panoramic radiographies of 394 female and 350 male subjects aged between 8 and 22 years were examined. Third molar development was determined according to the Nolla classification system, and eruption was assessed relative to the alveolar bone level. Mandibular and maxillary third molars were generally found at similar stages of development on both sides. Nolla stage 6 (completed crown calcification) was reached at around the age of 15 in both maxillary and mandibular third molars in both sexes. Alveolar emergence was at around the age of 16 in males and around age of 17 in females. Although third molars' eruption shows greater variability than development of third molars, data which were obtained from this study about eruption of these teeth can be supportive to development data for age estimation.

  15. Hypomineralized second primary molars: Prevalence data in Dutch 5-year-olds

    Elfrink, M.E.C.; Schuller, A.A.; Weerheijm, K.L.; Veerkamp, J.S.J.

    2008-01-01

    The aim of this cross-sectional observational study was to report on the prevalence of hypomineralizations in second primary molars in 5-year-old Dutch children. In the study 386 (45% girls) 5-year-old Dutch children, all insured by a Health Insurance Fund, participated. Scoring criteria for molar i

  16. Hypomineralized second primary molars : prevalence data in Dutch 5-year-olds

    Elfrink, M E C; Schuller, A A; Weerheijm, K L; Veerkamp, J S J

    2008-01-01

    The aim of this cross-sectional observational study was to report on the prevalence of hypomineralizations in second primary molars in 5-year-old Dutch children. In the study 386 (45% girls) 5-year-old Dutch children, all insured by a Health Insurance Fund, participated. Scoring criteria for molar i

  17. Validity of scoring caries and primary molar hypomineralization (DMH) on intraoral photographs

    Elfrink, M.E.C.; Veerkamp, J.S.J.; Aartman, I.H.A.; Moll, H.A.; ten Cate, J.M.

    2009-01-01

    AIM: The aims of this study were to assess whether intraoral photographs could be used to score caries and hypomineralization on primary molars (Using adapted Molar Incisor Hypomineralization (MIH)-criteria), and also to assess the reliability and validity in 3-7 year-old Dutch children of these sco

  18. Hypomineralized second primary molars: prevalence data in Dutch 5-year-olds

    Elfrink, M.E.C.; Schuller, A.A.; Weerheijm, K.L.; Veerkamp, J.S.J.

    2008-01-01

    The aim of this cross-sectional observational study was to report on the prevalence of hypomineralizations in second primary molars in 5-year-old Dutch children. In the study 386 (45% girls) 5-year-old Dutch children, all insured by a Health Insurance Fund, participated. Scoring criteria for molar i

  19. Morphology and chemical composition of dentin in permanent first molars with the diagnose MIH

    Heijs, Suzanne C. B.; Dietz, Wolfram; Noren, Jorgen G.; Blanksma, Nynke G.; Jalevik, Birgitta

    2007-01-01

    The purpose of this investigation was to study the morphology and distribution of some inorganic elements in dentin in first permanent molars from children with Molar-Incisor Hypomineralization (MIH). Sixty four tooth sections from thirty two children were examined in polarized light. Fifteen repres

  20. Evaluation of telemedicine systems for impacted third molars diagnosis

    Duka Miloš

    2009-01-01

    Full Text Available Background/Aim. In the last twenty years significant advances have been made in the fields of information and telecommunication technology in health care applications, with a positive impact on the health care practice. The need for remote diagnosis and planning of interventions is of special importance in military health care, and health management of immobile persons, and those with special needs. In cases such as these, availability of specialist health care is mainly limited by geographic and financial factors. The aim of this study was to investigate practical usability of telemedicine approaches in everyday management of oral surgery patients in terms of reliability of established diagnosis and indications for oral surgery treatment of the third molars. Methods. Our experimental randomized study enrolled 432 randomly selected patients of both genders, aged 20 to 87 years, undergoing panoramic radiography for some reason in the Centre for Dental Radiography in Belgrade. In addition to radiography, photographs of the face and mouth cavity were taken. These images were uploaded to the web server specially dedicated to the study purposes, and then transmitted to teledentists, i.e. oral surgeons, who made remote diagnoses. Diagnostic agreement was determined by way of the Cohen's kappa coefficient, and diagnostic sensitivity (SE, specificity (SP, and effectiveness (EFF were also established. Statistical significance was determined and comparisons performed by using the z-test, and testing of non-parametric characteristics by using the McNemar's χ2 test for p = 0.05 significance cut-off. Results. The results obtained by analyzed images and diagnostic assessment of the clinical diagnosis (kappa = 0.99, SE = 99%, SP = 99%, EFF = 99%, for 95% CI indicate an almost complete diagnostic agreement. The differences in diagnosis were not statistically significant. Conclusion. Diagnostic assessment of the clinical diagnosis of impacted or semi

  1. [Orthodontic partial disimpaction of mandibular third molars prior to surgical extraction].

    Derton, Nicolà; Perini, Alessandro; Giordanetto, José; Biondi, Giovanni; Siciliani, Giuseppe

    2009-06-01

    Odontodysplasia of the third molars is a relatively common anomaly. The frequent complications associated with this disorder very often constitute an indication for extraction of the third molar. This surgical treatment can damage the lower alveolar nerve and/or trigger distal bone loss of the second molar, thus jeopardizing the future status of the periodontium. The author presents two case studies treated exclusively with miniscrews with no dental anchorage in order to achieve partial eruption of the third molar moving it away from the lower alveolar nerve and to avoid unwanted impact on other teeth. Following this procedure, the third molar was extracted without complications. In conclusion, this approach can offer an alternative to surgical treatment alone in cases where the proximity of tooth and nerve poses a significant risk.

  2. Inferior mesenteric artery branch avulsion from blunt trauma--CT findings. Case report.

    Olson, M; Posniak, H; Gomes, G

    1992-01-01

    Mesenteric arterial injuries are uncommon following blunt abdominal trauma. We describe the computed tomography (CT) findings of a patient with avulsion of a branch of the inferior mesenteric artery following a low-speed motor vehicle accident.

  3. Permanent neurologic deficit after inferior alveolar nerve block: a case report.

    Shenkman, Z; Findler, M; Lossos, A; Barak, S; Katz, J

    1996-10-01

    Permanent neurologic damage after an inferior dental nerve block is reported. Clinical manifestations included hemisensory syndrome, facial nerve palsy, hearing impairment, and ataxia. Possible mechanisms and preventive measures are discussed.

  4. Anterior and posterior inferior cerebellar artery infarction with sudden deafness and vertigo.

    Murakami, Takenobu; Nakayasu, Hiroyuki; Doi, Mitsuru; Fukada, Yasuyo; Hayashi, Miwa; Suzuki, Takeo; Takeuchi, Yuichi; Nakashima, Kenji

    2006-12-01

    We report a patient with anterior and posterior inferior cerebellar artery infarction, which manifested as profound deafness, transient vertigo, and minimal cerebellar signs. We suspect that ischaemia of the left internal auditory artery, which originates from the anterior inferior cerebellar artery, caused the deafness and transient vertigo. A small lesion in the middle cerebellar peduncle in the anterior inferior cerebellar artery territory and no lesion in the dentate nucleus in the posterior inferior cerebellar artery territory are thought to explain the minimal cerebellar signs despite the relatively large size of the infarction. Thus a relatively large infarction of the vertebral-basilar territory can manifest as sudden deafness with vertigo. Neuroimaging, including magnetic resonance imaging, is strongly recommended for patients with sudden deafness and vertigo to exclude infarction of the vertebral-basilar artery territory.

  5. Progress and Outlook on Technologies for Processing Inferior Crude Oil in China

    Yuan Qingtang

    2008-01-01

    The recent growth of the global petroleum refining industry and the main technologies and measures for China to process inferior crude oil were introduced. The main technologies and measures include the control over equipment corrosion induced by sour and acidic crude, in particular the corrosion of atmospheric and vacuum distillation units, the development of technology for processing inferior residue,and the development of desulfurization technology and sulfur recovery technology in the course of processing of petroleum products. In order to meet the needs for national economic development, China's refining enterprises will uninterruptedly develop and prefect technologies for processing inferior crude,enhance the process and equipment management, sum up the experience for better processing of inferior crude, so as to provide high-quality oil products and petrochemical feedstocks to public with better economic return.

  6. Deep Venous Thrombosis Associated With Inferior Vena Cava Abnormalities And Hypoplastic Kidney In Siblings

    Duicu Carmen

    2016-06-01

    Full Text Available Congenital inferior vena cava anomalies have a reduced frequency in general population, many times being an asymptomatic finding. Patients caring such anomalies are at risk to develop deep vein thrombosis. In this paper, we present 2 siblings with deep venous thrombosis and inferior vena cava abnormalities, with a symptomatic onset at similar age. The inferior vena cava abnormality was documented by an angio-CT in each case. The thrombophilic workup was negative. Patients were treated with conservative therapy: low molecular weight heparin anticoagulants converted later to oral anticoagulant with resolution of symptoms and disappearance of the thrombus. Finally, in the absence of any risk factor in a young patient admitted with deep vein thrombosis investigations to exclude inferior vena cava anomalies are mandatory.

  7. Biodentine Pulpotomy in Mature Permanent Molar: A Case Report

    2016-01-01

    Irreversible pulpitis is the most common reason for endodontic treatment in primary and permanent teeth. Root canal therapy and extraction are the two viable and most documented treatment options for the same. Studies with regards to management of mature permanent teeth with carious exposure and treatment with vital pulp therapies such as adult permanent tooth pulpotomy are scarce. However, permanent tooth pulpotomy with the new calcium-silicate based cements (Mineral Trioxide Aggregate and Biodentine) can help preserve the tooth pulp vitality and promote healing and repair foregoing the more invasive root canal therapy procedure. A 12-year old male patient with irreversible pulpitis in right mandibular first permanent molar was treated with complete coronal pulpotomy with placement of Biodentine in the pulp chamber and a full coronal coverage using stainless steel crown. Clinical and radiographic examinations were performed at three, six, twelve and eighteen months. At the end of 18 months, the patient was completely asymptomatic and the tooth was free of any clinical and radiographic signs of inflammation and infection. PMID:27630966

  8. MTA pulpotomy of human permanent molars with irreversible pulpitis.

    Eghbal, Mohammad Jafar; Asgary, Saeed; Baglue, Reza Ali; Parirokh, Masoud; Ghoddusi, Jamileh

    2009-04-01

    The histological success of mineral trioxide aggregate (MTA) pulpotomy for treatment of irreversible pulpitis in human teeth as an alternative treatment was investigated in this study. Fourteen molars which had to be extracted were selected from patients 16-28 years old. The selection criteria include carious pulp exposure with a history of lingering pain. After isolation, caries removal and pulp exposure, MTA was used in pulpotomy treatment. Patients were evaluated for pain after 24 h. Two patients were lost from this study. Twelve teeth were extracted after 2 months and were assessed histologically. Recall examinations confirmed that none of the patients experienced pain after pulpotomy. Histological observation revealed that all samples had dentin bridge formation completely and that the pulps were vital and free of inflammation. Although the results favour the use of MTA as a pulpotomy material, more studies with larger samples and a longer recall period are suggested to justify the use of MTA for treatment of irreversible pulpitis in human permanent teeth.

  9. Biodentine Pulpotomy in Mature Permanent Molar: A Case Report.

    Soni, Harleen Kaur

    2016-07-01

    Irreversible pulpitis is the most common reason for endodontic treatment in primary and permanent teeth. Root canal therapy and extraction are the two viable and most documented treatment options for the same. Studies with regards to management of mature permanent teeth with carious exposure and treatment with vital pulp therapies such as adult permanent tooth pulpotomy are scarce. However, permanent tooth pulpotomy with the new calcium-silicate based cements (Mineral Trioxide Aggregate and Biodentine) can help preserve the tooth pulp vitality and promote healing and repair foregoing the more invasive root canal therapy procedure. A 12-year old male patient with irreversible pulpitis in right mandibular first permanent molar was treated with complete coronal pulpotomy with placement of Biodentine in the pulp chamber and a full coronal coverage using stainless steel crown. Clinical and radiographic examinations were performed at three, six, twelve and eighteen months. At the end of 18 months, the patient was completely asymptomatic and the tooth was free of any clinical and radiographic signs of inflammation and infection.

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

    Zanolli, Clément

    2015-01-01

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

  11. Experience versus complication rate in third molar surgery

    Al-Khawalde Mohammed

    2006-05-01

    Full Text Available Abstract Objectives The records of 1087 patients who underwent surgical removal of third molar teeth were prospectively examined to analyse the possible relationship between postoperative complications and the surgeon's experience parameter. Method and materials Seven surgeons (three specialists in surgical dentistry [specialists SD] and four oral and maxillofacial Senior House Officers [OMFS residents] carried out the surgical procedures. For each patient, several variables were recorded including age, gender, radiographic position of extracted teeth, treating surgeon, duration of surgery and postoperative complications. Results Analysis of the data revealed some differences in the incidence of complications produced by the specialists SD and OMFS residents. The main statistically relevant differences were increase the incidences of trismus, nerve paraesthesia, alveolar osteitis and infection in the resident-treated group, while the specialist-treated group showed higher rates of post-operative bleeding. Conclusion The higher rate of postoperative complications in the resident-treated group suggests that at least some of the complications might be related to surgical experience. Further work needs to compare specialists of training programmes with different years of experience, using large cross – sectional studies.

  12. Prediction of Molar Volumes of the Sudanese Reservoir Fluids

    A. A. Rabah

    2010-01-01

    Full Text Available This paper provided important experimental PVT data of the Sudanese reservoir fluids. It includes composition analysis of 11 mixtures and about 148 PVT data points of constant mass expansion (CME tests at pressures below the bubble point. The datasets are compared with eight equations of state (EOS, namely, Peng Robinson (PR, Soave-Redlich-Kwong (SRK, Lawal-Lake-Silberberg (LLS, Adachi-Lu-Sugie (ALS, Schmidt-Wenzel (SW, Patel-Teja (PT, Modified-Nasrifar-Moshfeghian (MNM, and Harmens-Knapp (HK. The results of comparison reveals that, with the exception of PR and ALS EOSs, all other EOSs yield consistently a higher average absolute percent deviation (AAPD in the prediction of molar volume; it exceeds 20% by all mixtures. The grand average AAPD of all mixtures is 17 and 16 for PR and ALS, respectively. ALS is selected to represents the mixtures. It is modified by replacing the coefficient (Ωb1 of the parameter (b1 in the dominator of repulsive term by that of PR. This procedure enhanced the accuracy of ALS by 30 to 90% for individual mixtures and the grand average AAPD is significantly reduced from 16 to about 7.

  13. Molar incisor hypomineralization in HIV-infected children and adolescents.

    Andrade, Natália Silva; Pontes, Alessandra Silva; de Sousa Paz, Hélvis Enri; de Moura, Marcoeli Silva; Moura, Lúcia de Fátima Almeida de Deus; Lima, Marina de Deus Mourade

    2017-01-01

    The objective was to determine the prevalence of molar incisor hypomineralization (MIH) among individuals between 7 and 15 years old infected or noninfected with human immunodeficiency virus (HIV). The study was conducted with 33 HIV-infected individuals (study group; SG) and 66 non-HIV-infected schoolchildren (control group; CG), paired by gender and age. Data collection was based on medical records (SG), a questionnaire for caregivers and oral examination for diagnosis of MIH (European Academy of Pediatric Dentistry criteria) and caries (DMFT index and ICDAS). Data were analyzed with Mann-Whitney, chi-square, and Fisher's exact tests and logistic regression. In SG, MIH (45.5%) and caries (87.9%) had higher prevalence. MIH was associated with use of protease inhibitors in SG (OR: 2.14; 95% CI: 1.21 to 3.77) and incubator need in CG (OR: 2.80; 95% CI: 1.71 to 9.10). HIV-infected patients had a higher prevalence of MIH and dental caries in the permanent dentition.

  14. Inflammatory trigeminal nerve and tract lesions associated with inferior alveolar nerve anaesthesia.

    Blair, N F; Parratt, J D E; Garsia, R; Brazier, D H; Cremer, P D

    2013-11-01

    Inferior alveolar nerve blocks are commonly performed for dental anaesthesia. The procedure is generally safe with a low rate of complications. We report a patient with a reproducible, delayed-onset sensory deficit associated with contrast-enhancing lesions in the trigeminal nerve, pons and medulla following inferior alveolar nerve local anaesthesia. We propose that this previously undescribed condition is a form of Type IV hypersensitivity reaction.

  15. Sample Size Estimation for Non-Inferiority Trials: Frequentist Approach versus Decision Theory Approach.

    A C Bouman

    Full Text Available Non-inferiority trials are performed when the main therapeutic effect of the new therapy is expected to be not unacceptably worse than that of the standard therapy, and the new therapy is expected to have advantages over the standard therapy in costs or other (health consequences. These advantages however are not included in the classic frequentist approach of sample size calculation for non-inferiority trials. In contrast, the decision theory approach of sample size calculation does include these factors. The objective of this study is to compare the conceptual and practical aspects of the frequentist approach and decision theory approach of sample size calculation for non-inferiority trials, thereby demonstrating that the decision theory approach is more appropriate for sample size calculation of non-inferiority trials.The frequentist approach and decision theory approach of sample size calculation for non-inferiority trials are compared and applied to a case of a non-inferiority trial on individually tailored duration of elastic compression stocking therapy compared to two years elastic compression stocking therapy for the prevention of post thrombotic syndrome after deep vein thrombosis.The two approaches differ substantially in conceptual background, analytical approach, and input requirements. The sample size calculated according to the frequentist approach yielded 788 patients, using a power of 80% and a one-sided significance level of 5%. The decision theory approach indicated that the optimal sample size was 500 patients, with a net value of €92 million.This study demonstrates and explains the differences between the classic frequentist approach and the decision theory approach of sample size calculation for non-inferiority trials. We argue that the decision theory approach of sample size estimation is most suitable for sample size calculation of non-inferiority trials.

  16. Exposed inferior alveolar neurovascular bundle during surgical removal of a residual cyst.

    Boffano, Paolo; Gallesio, Cesare

    2010-01-01

    Iatrogenic neurodeficiency is one of the most distressing complications to any surgical procedure. The prediction of close proximity of the oral lesions to the inferior alveolar neurovascular bundle is extremely important. Furthermore, iatrogenic neurosensory dysfunctions of the facial region involve important medicolegal issues. In this report, we describe the case of a patient who did not show either paresthesia or anesthesia after the surgical removal of a mandibular residual cyst that exhibited adherence to the inferior alveolar nerve bundle.

  17. Spontaneous alignment of crowded inferior incisives after the extractionof temporary canines

    Orellana Manrique, Tomás Oriel; Departamento Académico de Estomatología Pediátrica. Facultad de Odontología UNMSM. Lima Perú.; Calderón Cortez, Iván; Estudiante de pre grado. Facultad de Odontología UNMSM. Lima Perú.; Orellana Manrique, Martín; Estudiante de Maestría. Facultad de Odontología UNMSM. Lima Perú.

    2014-01-01

    This investigation evaluated the behavior of permanent inferior incisives after the primary canine’s extractions. The study was carried out in the Pediatric Clinic of Dental Faculty of San Marcos University. The sample was conformed by 10 patients, male and female children, between 8 and 9 years of age, with good general health, having Class I malocclusion and severe crowding of the inferior incisives. It was taken Cephalometric and Panoramic radiographies, as well as models to make the ortho...

  18. [Investigation of the age-dependent development of brachygnathia inferior in the East Friesian milk sheep].

    Pielmeier, Ricarda; Kerkmann, Andrea; Distl, Ottmar

    2012-01-01

    Shortness of the lower jaw (brachygnathia inferior, underbite) is a common anomaly in sheep. In order to study the age-dependent development of brachygnathia inferior, data of 73 East Friesian milk sheep from a breeding experiment over six generations were analysed. Data were recorded in regular intervals of four weeks from birth up to an age of at least 25 weeks. Brachygnathia inferior was determined by the distance between the edge of the central incisor of the lower jaw and the anterior surrounding of the upper jaw (DIFF-UK) using a measuring tape. Four main types of brachygnathia inferior were distinguished using means, standard deviations and maximum values of the individual animals.The thresholds were a maximum and mean DIFF-UK of 0.5 cm and a standard deviation of 0.266 cm. A total of 14 sheep (main types 3 and 4) showed an obvious brachygnathia inferior with mean DIFF-UK larger than 0.5 cm whereof ten animals showed a large variation of DIFF-UK values (standard deviation > 0.226 cm). Mean DIFF-UK values of 59 sheep were smaller than 0.5 cm (main types 1 and 2). One of these 59 animals had during the first four weeks of life DIFF-UK values of 1 cm and than decreasing values reaching zero within the next nine months (main type 2). Five of the 58 animals with main type 1 had a perfect occlusion of jaws, all with DIFF-UK values at zero during the whole recording period. Parents with severe or mild brachygnathia inferior had severely affected progeny. Selection of sheep for breeding with a perfect occlusion of jaws decreases the risk to pass on the hereditary disposition for brachygnathia inferior. An early inspection of potential breeding animals is advisable to detect all cases of brachygnathia inferior even if the underbite decreases in the first year of life.

  19. Inferior Alveolar Nerve Injuries Following Implant Placement - Importance of Early Diagnosis and Treatment: a Systematic Review

    Ilana Shavit; Gintaras Juodzbalys

    2014-01-01

    ABSTRACT Objectives The purpose of this article is to systematically review diagnostic procedures and risk factors associated with inferior alveolar nerve injury following implant placement, to identify the time interval between inferior alveolar nerve injury and its diagnosis after surgical dental implant placement and compare between outcomes of early and delayed diagnosis and treatment given based on case series recorded throughout a period of 10 years. Material and Methods We performed li...

  20. Partial molar volume and partial molar compressibility of four homologous {alpha}-amino acids in aqueous sodium fluoride solutions at different temperatures

    Rajagopal, K., E-mail: krpal25@yahoo.co [Department of Physics, Government College of Engg., Tirunelveli 627 007, Tamilnadu (India); Edwin Gladson, S., E-mail: aseg_win@rediffmail.co [Department of Physics, St. Xavier' s Catholic College of Engg., Chunkankadai 629 003, Tamilnadu (India)

    2011-06-15

    Research highlights: Partial molar volume indicates strong solute-cosolute interaction in the NaF solution. Partial molar compressibility results compliment partial molar volume results. Hydration number proves that sodium fluoride has dehydration effect on amino acids. Interactions between sodium fluoride and (NH{sub 3}{sup +},COO{sup -}) group of amino acid are stronger. - Abstract: Density and ultrasonic speed of four amino acids (glycine, L-alanine, L-valine, and L-leucine) in aqueous sodium fluoride solutions {l_brace}(0.1 to 0.5) M{r_brace} have been measured at T = (308.15, 313.15, and 318.15) K. Apparent molar volumes (V{sub {phi}}), partial molar volumes (V{sub {phi}}{sup 0}), transfer volumes ({Delta}V{sub {phi}}{sup 0}) and hydration number (n{sub H}) are evaluated using density data. Adiabatic compressibility ({beta}{sub s}), change ({Delta}{beta}{sub s}), and relative change in compressibility ({Delta}{beta}{sub s}/{beta}{sub 0}), apparent molar compressibility (K{sub {phi}}), partial molar compressibility (K{sub {phi}}{sup 0}), transfer compressibility ({Delta}K{sub {phi}}{sup 0}), and hydration number (n{sub H}) have been calculated using ultrasonic speed data. The linear correlation of V{sub {phi}}{sup 0},{Delta}V{sub {phi}}{sup 0},K{sub {phi}}{sup 0} and {Delta}K{sub {phi}}{sup 0} for a homologous series of amino acids have been used utilised to calculate the contribution of charged end groups (NH{sub 3}{sup +}, COO{sup -}), CH{sub 2} group and other alkyl chain of the amino acids. The analysis shows that the ion-ion interactions are much stronger than ion-hydrophobic interactions over the entire concentration range of sodium fluoride. It is observed that sodium fluoride has a strong dehydration effect on amino acids.

  1. Measuring the Pressure in the Superficial Inferior Epigastric Vein to Monitor for Venous Congestion in Deep Inferior Epigastric Artery Perforator Breast Reconstructions : A Pilot Study

    Smit, Jeroen M.; Audolfsson, Thorir; Whitaker, Iain S.; Werker, Paul M. N.; Acosta, Rafael; Liss, Anders G.

    2010-01-01

    During deep inferior epigastric artery perforator (DIEP) flap dissection, we noted that in many cases the superficial vein on the ipsilateral side of the flap was engorged and tense, and in others, it was empty. This led us to believe that the pressure is increased as the result of preferential outf

  2. Comparing Eruption Space of the Lower Third Molar in Unerupted and Erupted Teeth via Digital Anoramic Radiography in Patients Referring to Yazd Dental College during 2011-13

    F Ezoddini Ardakani

    2014-08-01

    Conclusion: Increasing the angle between second and third molar as well as inadequate space of retro-molar can lead to impaction of lower third molar, but the width of third molar and the Gonial angle size did not reveal any significant role in determination of impaction or eruption of third molar.

  3. 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

    Juliana Maria Quaglio

    2006-12-01

    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.

  4. MEASURED DENSITIES, REFRACTIVE INDICES, EXCESS MOLAR VOLUMES AND DEVIATIONS CALCULATED FROM MOLAR REFRACTION OF THE BINARY MIXTURE OF ETHANOL + 1-NONANOL AND TERNARY MIXTURE ETHANOL + 1-NONANOL + WATER AT 293.15 K

    Mehmet MAHRAMANLIOĞLU

    2000-03-01

    Full Text Available Densities, and refractive indices were measured for the binary system ethanol + 1-nonanol and ternary system ethanol + 1-nonanol + water at 293.15 K. The excess molar volumes, and the deviations molar refraction were calculated for binary and ternary system. Redlich-Kister type equation was fitted to the excess molar volumes and, the deviations from a mole fraction average of the molar refraction, and the values of coefficients were calculated

  5. Development of the first permanent mandibular molar in young children with unilateral complete cleft lip and palate (UCCLP)

    Hermann, Nuno Vibe; Darvann, Tron A; Kreiborg, Sven

    Development of the first permanent mandibular molar in young children with unilateral complete cleft lip and palate (UCCLP)......Development of the first permanent mandibular molar in young children with unilateral complete cleft lip and palate (UCCLP)...

  6. Issues on the selection of non-inferiority margin in clinical trials

    HOU Yan; WU Xiao-yan; LI Kang

    2009-01-01

    Objective The determination of non-inferiority margin is an important and confusing issue which directly influences the acceptability of a new medication. We reviewed the published literature, International Conference on Harmonization of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH) Guidelines and Committee for Proprietary Medicinal Products (CPMP) papers on the selection of non-inferiority margin and the corresponding statistical tests in clinical trials, in order to provide practical recommendations and suggestions for establishing reference criteria for the non-inferiority margin in China.Data sources The literature on the selection of a non-inferiority margin and statistical tests was mainly extracted from relevant English articles on non-inferior clinical trials published from 1990 to 2007. The starting point (1990) was chosen due to lack of such papers published prior to 1990. This literature was searched via PubMed, Medline and Chinese Knowledge Information (CNKI). ICH guidelines and CPMP papers were downloaded from their official websites. The keywords "clinical trial", "non-inferiority" and "non-inferiority margin" were used.Study selection Forty-three original articles and critical reviews, ICH E10 guideline and CPMP papers were selected.Results The non-inferiority testing with treatment difference and ratio are commonly used, where the non-inferiority margin is determined with and without historical data. Traditionally, this margin is treated as a fixed value, while developed methods take the variation into account in the determination of this margin, on which the test depends is more convincing. The mixed margin consisting of a margin based on treatment difference and a margin based on treatment ratio can exactly control the type Ⅰ error at the desirable level and obtain a better power. In this review, we also provide some recommendations and suggestions for the selection of the non-inferiority margin in the western

  7. Changes in the Position of Mandibular Third Molars Following Extraction and Non-Extraction Orthodontic Treatments

    Maryam Poosti

    2013-01-01

    Full Text Available Introduction: Impaction of third molars can be associated with a number of sequelae, each requiring a different type of treatment. The purpose of this study was to assess the changes in the position of lower third molars following extraction and non-extraction orthodontic treatments. Methods: Pre- and post-treatment panoramic radiographs of 26 class I malocclusion patients (4 male and 22 female who were treated on a non-extraction basis were compared with those of 30 class I malocclusion patients (5 male and 25 female who received orthodontic treatment following the extraction of all first premolars. In each group, the lower third molar angulations and their distance from the lower border of the mandible were assessed. Results: Paired t-tests and independent t-tests detected significant changes in the position of the lower third molars in the extraction group. Both the left and right molars became more upright and their distance from the lower border of the mandible increased. Similar changes were only seen in the position of the right mandibular third molars in the non-extraction group. Conclusion: Tooth extractions can bring about favorable changes in the position of mandibular third molars and possibly reduce their incidence of impaction

  8. Changes in the Position of Mandibular Third Molars Following Extraction and Non-Extraction Orthodontic Treatments

    Maryam Poosti

    2012-09-01

    Full Text Available Introduction: Impaction of third molars can be associated with a number of sequelae, each requiring a different type of treatment. The purpose of this study was to assess the changes in the position of lower third molars following extraction and non-extraction orthodontic treatments. Methods: Pre- and post-treatment panoramic radiographs of 26 class I malocclusion patients (4 male and 22 female who were treated on a non-extraction basis were compared with those of 30 class I malocclusion patients (5 male and 25 female who received orthodontic treatment following the extraction of all first premolars. In each group, the lower third molar angulations and their distance from the lower border of the mandible were assessed. Results: Paired t-tests and independent t-tests detected significant changes in the position of the lower third molars in the extraction group. Both the left and right molars became more upright and their distance from the lower border of the mandible increased. Similar changes were only seen in the position of the right mandibular third molars in the non-extraction group. Conclusion: Tooth extractions can bring about favorable changes in the position of mandibular third molars and possibly reduce their incidence of impaction.

  9. Morphology of the Physiological Apical Foramen in Maxillary and Mandibular First Molars

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

    2015-01-01

    SUMMARY Information regarding the anatomy of the physiological apical foramen is limited. Knowing its diameter and shapes contributes to clinical work, specifically to the cleaning and shaping of the apical third. The aim of this ex vivo study was to determine the minimum and maximum diameters and shape of the physiological apical foramen in the roots of maxillary and mandibular first molars. A descriptive study was conducted on 89 recently extracted first molars. Roots 3–5 mm from the apex were sectioned and prepared for analysis at 40× magnification. The minimum and maximum diameters of each physiological foramen were measured using the program Motic Images plus 2.0 ML. The shape of the foramina, classified as round, oval or irregular, was determined by the difference between the maximum and minimum diameters. A total of 174 physiological foramina were analyzed. The average of the minimum and maximum diameters was between 0.24–0.33 mm in maxillary first molars and between 0.25–0.33 mm in mandibular first molars. In maxillary molars, the most common shape of the foramen was oval (50%), then irregular (32%), then round (18%). In mandibular molars, the oval shape was also the most frequent (59%), followed by irregular (23%) and round (18%). The findings of this study regarding the morphology of physiological apical foramina in first molars make it easier for the operator to choose the appropriately-sized instruments to perform endodontic therapy successfully. PMID:25937698

  10. Radiographic findings on 3rd molars removed in 20-year-old men.

    Rajasuo, Ari; Peltola, Jaakko; Ventä, Irja; Murtomaa, Heikki

    2003-10-01

    In this study we assess radiographic findings characteristic of mandibular 3rd molars that had required either routine or surgical extraction. X-ray findings relating to acute pericoronitis were also examined. The material was collected by investigating patient records and rotational panoramic radiographs of 20-year-old Finnish male conscripts (n = 738) treated during military service because of 3rd-molar-related problems. The follicle around the crown of mandibular 3rd molars with acute pericoronitis was enlarged in 19% of cases and in 13% of chronic symptom-free pericoronitis cases (not statistically significant difference). Mandibular 3rd molars extracted surgically were more often mesially inclined than those extracted routinely (61% vs. 23%; P pericoronitis [around 27% vs. 39% of the teeth routinely extracted (OR 0.5, 95% CI 0.3-0.8)]. In 86% of cases the space between 2nd molar and ramus of the mandible was narrower than the 3rd molar extracted surgically, whereas this was 62% in routine extraction cases (P < 0.001). We conclude that there are some typical 3rd-molar findings in rotational panoramic radiographs that show a need for surgical extraction.

  11. Review of flap design influence on the health of the periodontium after mandibular third molar surgery.

    Karaca, Inci; Simşek, Sebnem; Uğar, Dilek; Bozkaya, Süleyman

    2007-07-01

    The purpose of this study is to review the effect of flap design in terms of periodontal status of the preceding second molar after lower third molar surgery. Impacted lower third molar surgery may result in periodontal complications on the distal surface of the adjacent second molar. Flap design that is used during impacted third molar surgery is important to prevent those complications. Several different flap techniques, mainly envelope, triangular (vertical) flaps, and their modifications have been developed to minimize those complications. Each technique has some advantages as well as disadvantages. It is also reported that the selection of a flap design does not seem to have a lasting effect on the health of periodontal tissue. The effect of the type of flap used for lower third molar surgery on the periodontal status of the second molar, as well as the factors that may influence this outcome, has been uncertain. The decision to use on one or the other of the flaps should be based on surgeon's preference.

  12. Prevalence and features of distolingual roots in mandibular molars analyzed by cone-beam computed tomography

    Choi, Mi Ree; Moon, Young Mi; Seo, Min Seock [Dept. of Conservative Dentistry, Wonkang University Daejeon Dental Hospital, Daejeon (Korea, Republic of)

    2015-12-15

    This study evaluated the prevalence of distolingual roots in mandibular molars among Koreans, the root canal system associated with distolingual roots, and the concurrent appearance of a distolingual root in the mandibular first molar and a C-shaped canal in the mandibular second molar. Cone-beam computed tomographic images of 264 patients were screened and examined. Axial sections of 1056 mandibular molars were evaluated to determine the number of roots. The interorifice distances from the distolingual canal to the distobuccal canal were also estimated. Using an image analysis program, the root canal curvature was calculated. Pearson's chi-square test, the paired t-test, one-way analysis of variance, and post-hoc analysis were performed. Distolingual roots were observed in 26.1% of the subjects. In cases where a distolingual root was observed in the mandibular molar, a significant difference was observed in the root canal curvature between the buccolingual and mesiodistal orientations. The maximum root canal curvature was most commonly observed in the mesiodistal orientation in the coronal portion, but in the apical portion, maximum root canal curvature was most often observed in the buccolingual orientation. The canal curvature of distolingual roots was found to be very complex, with a different direction in each portion. No correlation was found between the presence of a distolingual root in the mandibular first molar and the presence of a C-shaped canal in the mandibular second molar.

  13. Restorasi Resin Komposit Menggunakan Pasak Tapered Self Threading Pada Molar Ketiga Kiri Mandibula

    Ellen Krisanti

    2013-06-01

    Composite Resin Restoration Using Tapered Self Threading Poston Left Mandibular Third Molar. Root canal morphology of mandibular third molar has more complex variation than the other molars. In third molar, the extraction teeth are often executed; however, the third molar can be maintained in other conditions. One visit root canal treatment is a therapy option for this case. The purpose of this case report is to show the success of one visit root canal treatment in third molar with pulp necrosis by restoring the composite resin through tapered self-treading post. A 20 year-old female patient who came to the Prof Soedomo RSGM, FKG UGM complained about the pain when chewing food on her third molar and positive in percussion. The radiographs showed that there was an incomplete restoration. There was a gap between cavities with restoration. The treatment plan for this case was one visit root canal treatment and composite resin with tapered self-threading post as final restoration. From the case, it can concluded that one visit root canal treatment results in a smaller chance for microorganism recontamination than the multi-visit in order to ensure the success of the treatment. Direct composite resin restoration with tapered self-threading dowel is an alternative restoration after endodontic treatment because it works out faster and more retentive.

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

    Begtrup, Anders; Grønastøð, Halldis Á; Christensen, Ib Jarle; Kjær, Inger

    2013-08-01

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

  15. Radiographic correlation of dental and skeletal age: Third molar, an age indicator

    G N Suma

    2011-01-01

    Full Text Available Background: Age estimation plays a great role in forensic investigations, orthodontic and surgical treatment planning, and tooth transplantation. Teeth offer an excellent material for age determination by stages of development below the age of 25 years and by secondary changes after the age of 25 years. Third molar is often not included for this purpose due to its notorious developmental patterns. The aim of this study was to evaluate the development of third molar anlage in relation to skeletal maturities and the chronological age. Materials and Methods: One hundred and fifty-six young individuals, 78 males and 78 females, were selected. The stages of development of all the third molars in every individual were determined from panoramic radiographs. The skeletal development was assessed using hand wrist radiographs. Data were analyzed statistically for mean value, standard deviation and the relationship between the recorded characteristics. Results: A strong correlation was found between third molar development and skeletal maturity (in males: r=0.88, P<0.001; in females: r=0.77 for maxillary third molar and 0.89 for mandibular third molar, P<0.001. Conclusion: Hence, it is concluded that a strong correlation exists between chronological age, developmental stages of third molars and maturation of epiphyses of hand. Any of the three parameters could be used for the assessment of other maturities.

  16. Sex determination in modern Greeks using diagonal measurements of molar teeth.

    Zorba, Eleni; Moraitis, Konstantinos; Eliopoulos, Constantine; Spiliopoulou, Chara

    2012-04-10

    Sex determination is a necessary step in the investigation of unidentified human remains from a forensic context. Teeth, as one of the strongest tissues in the human body, can be used for this purpose. Most studies of sexual dimorphism in teeth are based on the traditional mesiodistal and buccolingual crown measurements. The purpose of this study is to examine the degree of sexual dimorphism in permanent molars of modern Greeks using crown and cervical diagonal diameters, and to evaluate their applicability in sex determination. A total of 344 permanent molars in 107 individuals (53 male and 54 female) from the Athens Collection were examined. Crown and cervical diagonal diameters of both maxillary and mandibular molars were measured. It was found that males have larger molars than females and in 19 out of 24 dimensions measured male molars exceeded female molars significantly (Pdiagonal diameters have found to be more sexually diamorphic than crown diagonal diameters. In discriminant function analysis the variables entered more frequently were the cervical diagonal diameters mainly of mandibular molars. Classification accuracy was found to be 93% for the total sample, 77.4% for upper jaw, and 88.4% for the lower jaw. Accuracy rates were higher for cervical than crown diagonal diameters. The data generated from the present study suggest that this metric method can be useful and reliable for sex determination, especially when the traditional dental measurements are not applicable.

  17. Pulpal responses to cavity preparation in aged rat molars.

    Kawagishi, Eriko; Nakakura-Ohshima, Kuniko; Nomura, Shuichi; Ohshima, Hayato

    2006-10-01

    The dentin-pulp complex is capable of repair after tooth injuries including dental procedures. However, few data are available concerning aged changes in pulpal reactions to such injuries. The present study aimed to clarify the capability of defense in aged pulp by investigating the responses of odontoblasts and cells positive for class II major histocompatibility complex (MHC) to cavity preparation in aged rat molars (300-360 days) and by comparing the results with those in young adult rats (100 days). In untreated control teeth, immunoreactivity for intense heat-shock protein (HSP)-25 and nestin was found in odontoblasts, whereas class-II-MHC-positive cells were densely distributed in the periphery of the pulp. Cavity preparation caused two types of pulpal reactions based on the different extent of damage in the aged rats. In the case of severe damage, destruction of the odontoblast layer was conspicuous at the affected site. By 12 h after cavity preparation, numerous class-II-MHC-positive cells appeared along the pulp-dentin border but subsequently disappeared together with HSP-25-immunopositive cells, and finally newly differentiated odontoblast-like cells took the place of the degenerated odontoblasts and acquired immunoreactivity for HSP-25 and nestin by postoperative day 3. In the case of mild damage, no remarkable changes occurred in odontoblasts after operation, and some survived through the experimental stages. These findings indicate that aged pulp tissue still possesses a defense capacity, and that a variety of reactions can occur depending on the difference in the status of dentinal tubules and/or odontoblast processes in individuals.

  18. Effect of age, impaction types and operative time on inflammatory tissue reactions following lower third molar surgery

    Obi Emeka V; Bamgbose Babatunde O; Adeyemo Wasiu L; Bello Seidu A; Adeyinka Ademola A

    2011-01-01

    Abstract Background Postoperative mobidity following third molar surgery is affected by a number of factors. The study of these factors is essential for effective planning and limitation of morbidity. The aim of this study was to determine the effect of age, type of impaction and operative time on immediate postoperative tissue reactions following mandibular third molar surgery. Methods Consecutive patients with impacted mandibular third molar teeth were studied. All the third molars were cla...

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

    2015-01-01

    Tooth impaction is a pathological situation where a tooth fails to attain its normal functional position. Impacted third molars are commonly encountered in routine dental practice. The impaction rate is higher for third molars when compared with other teeth. The mandibular third molar impaction is said to be due to the inadequate space between the distal of the second mandibular molar and the anterior border of the ascending ramus of the mandible. Impacted teeth may remain asymptomatic or may...

  20. Initial tooth movement under extraoral force and considerations for controlled molar movement.

    Yoshida, N; Jost-Brinkmann, P G; Yamada, Y

    1995-01-01

    Initial movement of the maxillary first molars under the application of straight-pull, cervical-pull, and high-pull headgear was measured in human subjects. Facebow deflection can influence molar movement as the relationship of the force vector to the molar's center of resistance changes with an increase of force. The present study proposes using headgear with a combination of variable-pull headcap and short outer bow. A variable-pull headcap allows a great range in force direction. The direction of the headgear force system can be accurately determined using a short outer bow.