Fratura mandibular durante remoção do terceiro molar: fatores de risco, medidas preventivas e métodos de tratamento / Mandibular fracture during third molar removal: risk factors, preventive measures and treatment methods

Fraturas mandibulares durante à extração do terceiro molar é uma complicação incomum, com consequências graves. Ocorrem quando a força de resistência do tecido ósseo e menor que as forças aplicadas durante o procedimento. O objetivo deste trabalho consiste em apresentar um caso clínico de fratura mandibular durante a exodontia do terceiro molar e também discutir os riscos, medidas preventivas e métodos de tratamento.

Mandibular fracture during third molar removal is an uncommon complication, with serious consequences. This occurs when the forces applied during surgery exceeds the strength of bone. The objective of this work is present a clinical case of mandibular fracture during third molar removal and also, discuss the risks, preventive measures and treatment methods.

Fratura mandibular após ferimento por arma branca: diagnóstico e conduta clínica / Mandibular fracture after stab wounds: diagnosis and clinical conduct

INTRODUÇÃO - Os ferimentos em face por armas brancas são raros, mas quando ocorrem, o cirurgião Buco-Maxilo-Facial deve estar apto a tratar esse tipo de lesão, haja vista que os insucessos podem resultar em alterações estético-funcionais que podem ser prejudiciais tanto funcional como psicologicamente. OBJETIVO - O artigo em questão buscou relatar um caso clinico de um paciente vitima de agressão física com extensa laceração em face por arma branca. CONCLUSÃO - O conhecimento dos princípios básicos de tratamento de lesões nos tecidos moles da face por arma branca é de suma importância para o alcance a resultados estéticos e funcionais satisfatórios.

INTRODUCTION - Facial stab wounds are rare but when occurs, the Maxillo-Facial surgeon should be able to treat this injury, given that failures can result in aesthetic and functional changes that can be functionally and psychologically harmful. OBJECTIVE - The article in question report a clinical case of a patient victim of assault with extensive facial laceration by a knife. CONCLUSION - Treatments knowledge about soft tissue injuries by facial stab wounds has a great importance to achievinga satisfactory aesthetic and functional result.

Structure and microstructure of coronary dentin in non-erupted human deciduous incisor teeth

The dentin structure of non-erupted human deciduous mandibular and maxillary central and lateral incisor teeth was studied employing light and scanning electron microscopy. For light microscopy, nitric-acid-demineralized and ground sections were used. The sections were stained by hematoxylin-eosin, picrosirius and azo-carmim methods, and ground specimens were prepared using a carborundum disk mounted in a handpiece. For SEM study, teeth were frozen in liquid nitrogen and fractured at longitudinal and transversal directions. Structurally, demineralization and ground methods revealed tubules with primary and secondary curvatures, canaliculi, giant tubules, interglobular dentin, predentin, and intertubular dentin. Scanning electron microscopy showed three-dimensional aspects of dentinal tubules, canaliculi, peritubular dentin, intertubular dentin, and predentin. This study contributes to knowledge about dentin morphology showing characteristics of teeth not yet submitted to mastication stress