Fixação funcionalmente estável no tratamento de sequela de fratura cominutiva de mandíbula por PAF / Functionally stable fixation in the treatment of comminuted jaw fracture by firearm projectile

Introdução: em traumas de alta energia por projéteis de arma de fogo (PAF), pode ocorrer a cominuição da mandíbula. Quando não identificadas ou tratadas de maneira equivocada, essas injúrias podem comprometer a saúde do indivíduo, com graves complicações estéticas e funcionais. Objetivo: o objetivo deste trabalho é relatar um caso de tratamento cirúrgico de sequela de ferimento por arma de fogo com fratura cominutiva em região de sínfise mandibular. Relato do caso: paciente procurou o serviço de cirurgia e traumatologia bucomaxilofacial após tratamento cirúrgico insatisfatório de fratura mandibular por PAF. Observou-se clinicamente mobilidade em manipulação, exposição óssea e drenagem purulenta. Na tomografia, observou-se gap ósseo, descontinuidade na base mandibular e material de osteossíntese inadequado. Foi proposta uma abordagem cirúrgica para instalação de placa de reconstrução do sistema 2.4 mm. Em acompanhamento pós-operatório, o paciente evoluiu com abertura bucal funcional e satisfatória, sem mobilidade nos fragmentos ósseos, arcabouço mandibular restabelecido e adequado posicionamento do material de fixação. Considerações finais: os casos de cominuição óssea apresentam características individuais que devem ser levadas em consideração em seu manejo. Nesses casos, a escolha do material de fixação é fundamental para o sucesso terapêutico e o uso de prototipagem soma para uma condução satisfatória do caso, garantindo menor tempo cirúrgico e melhor adaptação da placa. (AU)

Introduction: in high energy traumas caused by firearm projectiles may occur comminutive mandibular fractures. When it is not identified or inappropriately treated, these injuries can compromisse the individual's health, with serious aesthetics and funcional complications. Objective: the aim of this study is report a case of surgical treatment of sequelae from firearm injury with comminutive fracture in the region of mandibular symphysis. Case report: patient sought the service of Oral and Maxillofacial Surgery and Traumatology after 1 month of unsatisfactory surgical treatment of a mandibular fracture caused by firearm projectile. Clinical examination revealed mobility to manipulation and bone exposure with purulent drainage. Computed tomography of the face shows bad fracture consolidation in the anterior region of the mandible with bone gap and discontinuity in the mandibular base and inadequate and poorly positioned osteosynthesis material. It was then proposed a new surgical approach with instalation of the reconstruction plate of 2.4mm locking system. In postoperative follow-up, the patient evolved with a functional and satisfactory mouth opening, with no mobility in bone fragments, restored mandibular framework and adequate positioning of the fixation material. Final considerations: the cases of comminutive bone fractures show particular features that should be considered in their handling. In these cases, the choice of the fixation material is critical to therapeutic success and the use of prototyping sum for a satisfactory conduction of the case, ensuring shorter surgical time and better adaptation of the plate.(AU)

Manejo integral estético de una anomalía dentofacial / Comprehensive esthetic management of a dentofacial anomaly

RESUMEN Introducción: Las anomalías dentofaciales son trastornos del crecimiento dental y facial que afectan tanto a niños como a adultos. Objetivo: Presentar un caso clínico, en que en la búsqueda de armonía, por una anomalía dentofacial, se aplicaron principios del manejo multidisciplinario de cirugía ortognática y de otoplastia. Caso clínico: Paciente masculino de 18 años de edad que refiere inconformidad estética y en el que, mediante el análisis de modelos de estudio, mediciones de las telerradiografías indicadas y los hallazgos del examen físico, se llegó al diagnóstico de prognatismo mandibular con exceso vertical del mentón. Se ejecuta tratamiento ortodóncico-quirúrgico, realizándose osteotomía sagital mandibular y mentonoplastia de reducción de altura. Se emplearon como medios de fijación interna los tornillos bicorticales en la zona de ángulo mandibular y miniplacas en la región del mentón. Tres meses después se realizó otoplastia, para corregir la presencia de orejas prominentes, con el logro de un resultado funcional y estético satisfactorio. Conclusiones: Con la aplicación de los principios del manejo multidisciplinario de cirugía ortognática, combinada con la realización de una otoplastia, los resultados fueron positivos. Se alcanzó el objetivo de brindar armonía facial, con mejoría funcional y estética, y una alta satisfacción del paciente(AU)

ABSTRACT Introduction: Dentofacial anomalies are dental and facial growth disorders affecting children and adults alike. Objective: Present a clinical case of dentofacial anomaly in which principles of the multidisciplinary management of orthognathic surgery and otoplasty were applied to achieve harmony. Case report: A male 18-year-old patient reports esthetic dissatisfaction. Analysis of study models, measurements taken by teleradiography and findings of the physical examination led to the diagnosis of mandibular prognathism with a vertically extended chin. Orthodontic-surgical treatment was performed, consisting in sagittal mandibular osteotomy and height reduction mentoplasty. Bicortical screws were used for internal fixation in the mandibular angle area and miniplates in the chin region. Otoplasty was performed three months later to correct the presence of protruding ears, achieving satisfactory functional and esthetic results. Conclusions: Application of the principles of the multidisciplinary management of orthognathic surgery, combined with the conduct of otoplasty, led to positive results. The objective of achieving facial harmony was fulfilled, alongside functional and esthetic improvement and high patient satisfaction(AU)

Atrophic jaw fracture and predictability in oral rehabilitation: case report / Fratura de mandíbula atrófica e previsibilidade na reabilitação oral: relato de caso

Introduction: The treatment of atrophic jaw fractures requires extensive knowledge by the maxillofacial surgeon. The correct diagnosis and planning optimize the possibility of oral rehabilitation towards many possible alternatives. The difficulty in repairing these fractures makes the treatment complex, in which normally invasive techniques are used. However; which give us satisfactory and predictable aesthetic-functional results. Objective: The objective of this work is to report an atrophic jaw fracture and posterior dental implants re-habilitation. Case report: A 53 years old female patient, victim of in face aggression referred to the emergency care. At the clinical examination, the patient had laceration in the upper lip region and the left side of the mandibular area, with bilateral mobility and paresis. In the oral examination, total lower and partial upper edentulism. After tomographic evaluation, a bilateral fracture of the mandibular body was confirmed, with significant bone fragments uneven. Surgery was performed with total transcervical access and use of reconstruction plate. After 90 days of follow-up, the oral rehabilitation with osseointegrated implants was performed. Conclusion: Complex atrophic mandible fractures in total edentulous patients can be treated with open reduction and stable fixation, allowing a faster return to normal function, improve of quality of life and assists in increasing safety for implant installation (AU)

Introdução: O tratamento de fraturas em mandíbula atrófica requer amplo conhecimento por parte da cirurgião bucomaxilofacial. O correto diagnóstico e planejamento otimizam a possibilidade de reabilitação, diante das muitas alternativas possíveis. A dificuldade em reparar essas fraturas torna o tratamento complexo, no qual normalmente técnicas invasivas são usadas. Entretanto, é possível alcançar resultados funcionais e estéticos satisfatórios e previsíveis. Objetivo: O objetivo de este trabalho é relatar uma fratura em mandíbula atrófica seguida de reabilitação com implantes dentários em região posterior. Relato de caso: Paciente do sexo feminino, 53 anos, vítima de agressão em face buscou o serviço de emergência. No exame clínico, observou-se laceração na região do lábio superior esquerdo com mobilidade bilateral e paralisia em região mandibular. No exame intra-oral, edentulismo total inferior e parcial superior. Após avaliação tomográfica, a fratura bilateral do corpo mandibular foi confirmada, com presença de significativos fragmentos ósseos. A cirurgia foi realizada com acesso transcervical total e uso de placa de reconstrução. Após 90 dias de acompanhamento foi iniciada a etapa de reabilitação oral com implantes osseointegrados. Conclusão: Fraturas atróficas complexas da mandíbula em pacientes desdentados totais podem ser tratados com redução e fixação estável, permitindo um rápido retorno da função, melhora da qualidade de vida, além de auxiliar no aumento da segurança no momento da instalação dos implantes (AU)

Plate-screw and screw-washer stability in a Schatzker type-I lateral tibial plateau fracture: a comparative biomechanical study / Comportamento biomecânico de dois tipos de fixação usados como suporte na fratura do platô tibial lateral do tipo I de Schatzker

ABSTRACT The aim of this study was to evaluate the biomechanical role of both a non-locking two-hole small fragment dynamic compression plate with 3.5-mm screws and a 4.5-mm cortical screw with a washer applied to a Schatzker type-I tibial plateau fracture. Sixteen right synthetic tibiae were used to create an anterolateral shear tibial plateau fracture (Schatzker type-I fracture). Eight models were fixed with a small fragment non-locked straight dynamic compression plate with one 3.5-mm bicortical screw (plate-screw construction) and eight models were fixed with a 4.5-mm cortical screw and a washer (screw-washer construction), both inserted at 1.0 mm distal to the apex of the fracture. Specimens were tested up to the onset of yielding at a constant strain rate of 5.0-mm/min. Stiffness ranged from 311.83 N/mm to 199.54 N/mm, with a mean + SD of 260.32 + 33.8 N/mm in the plate-screw construction, and from 290.34 N/mm to 99.16 N/mm, with a mean + SD of 220.46 + 63.12 N/mm in screw-washer construction. There was no significant difference (p=0.172). Use of a two-hole small-fragment non-locked plate with one 3.5-mm cortical screw or a 4.5-mm cortical screw with a washer applied at 1.0 mm distal to the apex of the fracture as buttressing present similar stiffness in terms of preventing axial displacement in synthetic tibiae models tested up to the onset of yielding.

RESUMO O objetivo do estudo foi avaliar o comportamento biomecânico de dois tipos de fixação: placa de compressão dinâmica de pequenos fragmentos, não bloqueada com parafuso de 3,5mm e parafuso cortical de 4,5mm com arruela, ambos posicionados no vértice de fratura do platô tibial do tipo I de Schatzker. Dezesseis tíbias sintéticas foram utilizadas para criar uma fratura por cisalhamento na face ântero-lateral do platô tibial (tipo I de Schatzker). Oito modelos foram fixados com placa de compressão dinâmica de pequenos fragmentos não bloqueada com parafuso de 3,5mm, inserido 1,0mm distal ao vértice da fratura (construção placa-parafuso), e oito modelos foram fixados com parafuso cortical de 4,5mm com arruela, inserido 1,0mm distal ao vértice da fratura (construção parafuso-arruela). Os modelos foram testados em compressão axial até o início da falha mecânica na interface construção-osso, com taxa de deformação constante de 5,0mm/min. A rigidez variou de 311,83 N/mm a 199,54 N/mm, com média + DP de 260,32 + 33,8 N/mm nos modelos da construção placa-parafuso, e de 290,34 N/mm a 99,16 N/mm, com média + DP de 220,46 + 63,12 N/mm nos modelos da construção parafuso-arruela. Não houve diferença estatisticamente significativa (p=0,172). A utilização de placa de compressão dinâmica de pequenos fragmentos não bloqueada com parafuso de 3,5mm ou de parafuso cortical de 4,5mm com arruela, posicionados no vértice da fratura do platô tibial do tipo I de Schatzker, apresenta rigidez similar na prevenção do desvio axial da fratura.

¿Cómo fijamos el tubo endotraqueal en la unidad de cuidados intensivos pediátricos? / How to secure the endotracheal tube in the pediatric intensive care unit?

Introducción: Las extubaciones no planeadas son eventos adversos frecuentes en áreas críticas de pediatría. La técnica y el material para llevar a cabo la fijación condicionan la aparición de estos eventos adversos. La evidencia científica que evalúe factores es escasa. Objetivos: El objetivo principal de este trabajo fue obtener datos concretos al respecto de las prácticas de los enfermeros en la fijación del tubo endotraqueal (TET) e identificar técnicas. Métodos: Estudio de carácter descriptivo y prospectivo. Se encuestaron 125 enfermeros de las diferentes Unidades de Cuidados Intensivos durante el mes de noviembre de 2016. Resultados: El 88% de los enfermeros basan su método en la utilización de cinta adhesiva. La técnica de fijación de 3 tiras prevalece por encima de las demás (64%). No existen grandes preferencias al respecto del tipo de cinta adhesiva, no obstante, el 22% menciona a la cinta de óxido de zinc. La alternativa de fijación en niños quemados muestra a la venda de tela como una opción (42%). El 27% de los enfermeros consultados coincidió en que no existe una técnica ideal ya que esta va a depender de la circunstancia clínica del niño. Las complicaciones asociadas a la fijación inadecuada son en primer lugar el desplazamiento por introducción (54%) y la extubación (31%). Conclusión: Se evidencia una amplia variedad de criterios al momento de llevar a cabo la técnica de fijación de TET. Finalmente podemos concluir en que los métodos de fijación dependerán exclusivamente de las características clínicas del niño, el criterio del operador y los recursos disponibles en cada institución (AU)

Introduction: Unplanned extubations are frequent adverse events in critical care in pediatrics. The technique of endotracheal tube (ETT) fixation and the materials affect the appearance of these adverse events. Studies that evaluate these factors are scarce. Objectives: The main aim of this study was to collect data on the practices of nurses in the fixation of the ETT and to identify techniques. Methods: A prospective, descriptive study was conducted. A survey was administered to 125 nurses from different Intensive Care Units in November 2016. Results: 88% of the nurses use tape to secure the ETT. The method of fixation with three strips was the most widely used (64%). There was no preference on the type of tape used; however, 22% preferred to use zinc oxide tape. In burned patients an alternative method with a cloth bandage was used (42%). Overall, 27% of the nurses surveyed coincided that an ideal method to secure the ETT is lacking, as this depends on the clinical circumstances of the child. Complications associated with inadequate tube fixation are displacement during fixation (54%) and la extubation (31%). Conclusion: A wide variety of criteria is used in the techniques to secure the ETT. Finally, we may conclude that fixation methods depend exclusively on the clinical characteristics of the child, criteria of the operator, and resources available at the institution (AU)

Fractura condílea / Condylar fracture

Introducción: el cóndilo representa un punto estructural débil en el esqueleto mandibular. Objetivo: realizar una revisión bibliográfica sobre consideraciones anatómicas, diagnóstico, clasificación, tratamiento y complicaciones de las fracturas condíleas. Métodos: se realizó una revisión bibliográfica en agosto de 2016. Se evaluaron revistas de impacto de Web of Sciencies (17 revistas), 2 libros y 1 CD. Se consultaron las bases de datos MEDLINE, PubMed y SciELO con los descriptores: condilar fracture, treatment, epidemiology. Se incluyeron artículos en idioma inglés, preferentemente de los últimos 5 años. Se obtuvieron 111 artículos. El estudio se circunscribió a 34. Análisis e integración de la información: las consideraciones anatómicas de la región condílea son un punto de partida en este tema. El diagnóstico se basa en el interrogatorio, examen físico y medios auxiliares de diagnóstico. La clasificación precisa permite escoger la modalidad terapéutica a emplear y evitar complicaciones. Conclusiones: la revisión de la bibliografía permite precisar que hay razones anatómicas para la alta incidencia de las fracturas del proceso condilar mandibular. El primer objetivo del interrogatorio es obtener una historia exacta del paciente. El examen físico regional debe ser exhaustivo. La radiografía panorámica es una buena opción en el diagnóstico. El primer paso en el desarrollo de un plan de tratamiento es establecer qué tipo de lesión se ha sufrido para proporcionar una solución adecuada usando técnicas abiertas y cerradas, y evitar complicaciones posteriores(AU)

Introduction: the condyle represents a weak structural point in the mandibular skeleton. Objective: to perform a bibliographic review on anatomical considerations, diagnosis, classification, treatment and complications of condylar fractures. Methods: abibliographic review was carried out in August 2016. Journals of impact in the Web of Sciences (17 journals), 2 books and 1 CD were evaluated. The databases MedLine, PubMed and ScieELO were consulted with the descriptors: condylar fracture, treatment, and epidemiology. Articles in English were included, preferably from the last 5 years. 111 articles were obtained. The study was circumscribed to 34. Analysis and integration of information: the anatomical considerations of the condylar region are a starting point in this topic. The diagnosis is based on the interrogation, physical examination and diagnostic aids. Accurate classification allows choosing the therapeutic modality to be used and avoiding complications. Conclusions: the review of the literature makes it possible to specify that there are anatomical reasons for the high incidence of fractures of the mandibular condylar process. The first objective of the interrogation is to obtain an accurate history of the patient. The regional physical examination must be comprehensive. The panoramic radiograph is a good option for the diagnosis. The first step in the development of a treatment plan is to establish what type of injury has been suffered, in order to provide an adequate solution using open and closed techniques and avoid later complications(AU)

Fractura mandibular / Mandibular fracture

Introducción: las fracturas mandibulares son frecuentemente atendidas en cirugía bucal y maxilofacial. Objetivo: realizar una revisión bibliográfica sobre consideraciones anatómicas, diagnóstico, clasificación, tratamiento y complicaciones de las fracturas mandibulares. Métodos: se realizó una revisión bibliográfica de julio a agosto de 2016. Se evaluaron revistas de impacto de Web of Sciencies (35 revistas) y 3 libros. Se consultaron las bases de datos de MEDLINE, PubMed y ScieELO con los descriptores: mandibular fracture, treatment, epidemiology. Se incluyeron artículos en idioma inglés, preferentemente de los últimos 5 años. Se obtuvieron 120 artículos. El estudio se circunscribió a 51. Análisis e integración de la información: las consideraciones anatómicas de la región mandibular son un punto de partida en este tema. El diagnóstico se basa en el interrogatorio, examen físico y medios auxiliares de diagnóstico. La clasificación precisa permite escoger la modalidad terapéutica a emplear y evitar complicaciones. Conclusiones: la revisión de la bibliografía permite precisar que hay razones anatómicas para la alta incidencia de las fracturas de ángulo mandibular. El primer objetivo del interrogatorio es obtener una historia exacta del paciente. El examen físico regional debe realizarse de forma ordenada y precisa. La radiografía panorámica es una buena opción en el diagnóstico. El primer paso en el desarrollo de un plan de tratamiento es establecer qué tipo de lesión se ha sufrido para proporcionar una solución adecuada usando técnicas abiertas y cerradas, y evitar complicaciones posteriores(AU)

Introduction: mandibular fractures are often treated by oral and maxillofacial surgery. Objective: conduct a bibliographic review about the anatomical considerations, diagnosis, classification, treatment and complications of mandibular fractures. Methods: a bibliographic review was conducted from July to August 2016. The evaluation included high impact journals from the Web of Sciences (35 journals) and 3 books. The databases MEDLINE, PubMed and SciELO were consulted, using the descriptors mandibular fracture, treatment, epidemiology. Papers written in English were included, preferably if published in the last five years. Of the 120 papers obtained, the study considered 51. Data analysis and integration: anatomical considerations about the mandibular region are a starting point in this topic. Diagnosis is based on interrogation, physical examination and auxiliary diagnostic means. An accurate classification makes it possible to choose the therapy to be used and prevent complications. Conclusions: the bibliographic review permitted to confirm that there exist anatomical reasons for the high incidence of mandibular angle fractures. The first goal of interrogation is to obtain an exact patient history. The regional physical examination should be performed in an orderly, accurate manner. Panoramic radiography is a good choice of diagnostic technique. The first step in developing a treatment plan is to determine the type of lesion so as to provide an appropriate solution based on open and closed techniques, thus avoiding later complications(AU)

Mechanical evaluation of the use of conventional and locking miniplate/screw systems used in sagittal split ramus osteotomy

OBJECTIVES: The aim of this study was to compare the mechanical resistance of four different osteosyntheses modeled in two different sagittal split ramus osteotomy (SSRO) designs and to determine the linear loading in a universal testing machine. MATERIALS AND METHODS: An in vitro experiment was conducted with 40 polyurethane hemimandibles. The samples were divided into two groups based on osteotomy design; Group I, right angles between osteotomies and Group II, no right angles between osteotomies. In each group, the hemimandibles were distributed into four subgroups according to the osteosynthesis method, using one 4-hole 2.0 mm conventional or locking plate, with or without one bicortical screw with a length of 12.0 mm (hybrid technique). Each subgroup contained five samples and was subjected to a linear loading test in a universal testing machine. RESULTS: The peak load and peak displacement were compared for statistical significance using PASW Statistics 18.0 (IBM Co., USA). In general, there was no difference between the peak load and peak displacement related to osteotomy design. However, when the subgroups were compared, the osteotomy without right angles offered higher mechanical resistance when one conventional or locking 2.0 mm plate was used. One locking plate with one bicortical screw showed higher mechanical resistance (162.72±42.55 N), and these results were statistically significantly compared to one conventional plate with monocortical screws (P=0.016) and one locking plate with monocortical screws (P=0.012). The difference in peak displacement was not statistically significant based on osteotomy design or internal fixation system configuration. CONCLUSION: The placement of one bicortical screw in the distal region promoted better stabilization of SSRO. The osteotomy design did not influence the mechanical behavior of SSRO when the hybrid technique was applied.

Surgical treatment of mandibular condyle fracture with bicortical screws: case report

Introduction: Mandibular condyle fractures are, of all facial fractures, those with the greatest controversies in relation to its conduct. Patient systemic condition, location and displacement degree of the fracture, mouth opening amplitude, and occlusion alteration are some factors that influence on the decision on conservative or surgical treatment. Pain, mandibular movement limitation, altered dental occlusion, and facial asymmetry are signs and symptoms that indicate condylar fracture. The surgical treatment consists of surgical fracture reduction and subsequent fixing through titanium miniplates and/or screws. Objective: The aim of this study was to report the case of a patient who had parasymphyseal fracture associated with left mandibular condyle fracture, presenting limited excursive movements of the jaw, pain in function, altered dental occlusion, and bruising on chin region. Case report: Due to the type of fracture and patient systemic condition, we decided to open reduction of fractures and stable internal fixation. Conclusion: At 12-month follow-up, the patient showed significant improvement in both clinical and functional condition, demonstrating the effectiveness of the treatment method and technique.

Análise por Elementos Finitos das Forças Mastigatórias em uma Placa de Reconstrução Mandibular / Assessment of masticatory forces in a mandibular reconstruction titanium plate through finite element analysis

Ressecção cirúrgica é um tratamento radical de algumas patologias que acometem a mandíbula e suas estruturas associadas. A técnica baseia-se na remoção total da lesão com uma margem de segurança em toda a sua dimensão, podendo ser ela marginal ou parcial. A escolha dá-se pela proximidade da extensão da lesão com a margem inferior da mandíbula. Em situações de ressecção mandibular parcial, remove-se parcialmente a margem inferior da mandíbula o que, posteriormente, dificulta a reobtenção da estética e funcionalidade do aparelho estomatognático, sendo a área reconstruída com uma placa de reconstrução óssea. A análise de elementos finitos (AEF) é uma forma de análise matemática, que se fundamenta na divisão de uma estrutura em um número finito de pequenas áreas, denominado de elementos finitos. A essa divisão dá se o nome de "malha". Em geral, a AEF possui a capacidade de modelar matematicamente estruturas, tornando-se possível a aplicação de forças em qualquer ponto e/ou direção. Dessa forma, conseguem-se dados sobre a deformação e o grau de tensão inicial, sendo possível, assim, representar situações in vivo, expressando condições compatíveis com o real. O trabalho visa analisar e simular as tensões geradas pelas forças mastigatórias, com o uso de elementos finitos, em simulação de uma mandíbula reconstruída com placa e parafusos de titânio, após sua ressecção parcial... (AU)

Surgical ressection is a radical treatment of some pathologies that affect the mandible and its structures. The technique is based on total removal of the lesion with a safe margin in all extension of the bone. Partial mandible resection results in a difficult to obtain the aesthetic and functionality of the stomatognathic system. In such cases, is recommended a titanium plate commonly used to mandibular reconstruction. Finite Element Analysis (FEA) is a form of math analysis which is based on division of a structure in a finite number of small areas. In general, FEA has the ability to mathematically model structures making possible applying forces in any point and/ or direction. Thereby, it can bring forth datas of displacement and tension being possible representing in vivo situation. This study aims to analyze and simulate the tensions generated by the masticatory forces, using FEA in a mandibular reconstruction with titanium plate after partial resection... (AU)

Tratamento de fratura complexa de mandíbula por abordagem transcervical: relato de caso / Mandible complex fracture treatment through transcervical approach: case report

A fratura de mandíbula está entre as mais frequentes fraturas dos ossos da face, com um aumento significativo de casos nos últimos anos. A deficiência no exame físico e o tratamento inadequado podem levar à deformidade estética ou funcional permanente. O tratamento dessas injúrias visa efetuar uma redução anatômica e fixação dos fragmentos ósseos com o objetivo de restaurar a função e forma, reduzindo as complicações. Como opções de tratamento, incluem-se o conservador e as técnicas abertas para a redução e a fixação. O método aberto para fraturas complexas de mandíbula com múltiplos fragmentos ósseos pode ser por abordagens intraoral ou extraoral. O presente artigo relata o caso de um paciente do sexo masculino, 52 anos de idade vítima de agressão física que compareceu ao serviço de urgência de Cirurgia e Traumatologia Bucomaxilofacial apresentando trauma em face. Após o exame clínico e tomográfico, teve-se como diagnóstico a fratura múltipla de mandíbula, sendo o tratamento cirúrgico adotado com abordagem transcervical, abrangendo as regiões submandibulares bilateralmente e submentoniana com simplificação dos fragmentos com placas do sistema 2.0mm e fixação com placa do sistema 2.4mm, do tipo locking. O paciente segue em acompanhamento pós-operatório de seis meses sem queixas estéticas e funcionais... (AU)

The mandible fracture is among the most common of the bones of the face, with a significant increase in cases in recent years. Deficiency in physical examination and inadequate treatment can lead to aestheticor permanent functional deformity. The treatment of these injuries aims to make an anatomic reduction and fixation of bone fragments in order to restore form and function, reducing complications. The treatment options include conservative and open techniques for reduction and fixation. The open method for complex fractures of the jaw with multiple bone fragments can be through intra-oral or extra-oral approaches. This article reports a case of a male patient, 52 years old, physical aggression victim, who attended the urgency department of Oral and Maxillofacial Surgerywith trauma in the face. After clinical and CT examination had up to diagnosis of multiple jaw fractures, and surgical treatment with transcervical approach covering bilateral submandibulars and submental regions with simplification of the fragments with 2.0mm system plates and fixation with2.4mm system plates, locking type. The patient follows in postoperative follow-up of six months without aesthetic and functional complaints... (AU)

Fratura mandibular atípica por arma branca: relato de caso / Atypical mandibular fracture by lethal weapon: a case report

Lesões em face causadas por armas brancas, são pouco citadas na literatura, na maioria das vezes com relatos de casos. O cirurgião Buco- Maxilo-Facial, entretanto, deve estar apto a lidar com tal ocorrência, haja vista a significância estético-funcional dessa área. Como forma de contribuir com a referida temática, este trabalho tem por objetivo apresentar e discutir detalhes das técnicas bem como cuidados para prevenir possíveis complicações de um paciente apresentando múltiplos ferimentos corto contusos em região de mento e de traqueia, associados à fratura de sínfise e corpo mandibulares... (AU)

Lesions on the face, caused by bladed weapons are rarely described in the literature, most often with case reports. However, the surgeon Maxillo- Facial must be able to deal with such an occurrence, given the fact the aesthetic and functional significance of this area. As a contribution with that theme, this paper aims to present and discuss the technical details, as well as care to prevent possible complications of a patient with multiple injuries in blunt cut region ment and trachea, associated with fracture of the symphysis and mandibular body... (AU)

Use of a Y-Shaped Plate for Intermaxillary Fixation

Maxillomandibular fractures usually require intermaxillary fixation as a means to immobilize and stabilize the fracture and to re-establish proper occlusion. Arch bars or intermaxillary fixation screws cannot be used for edentulous patients or for patients who have poor dental health. Here, we present a case of repeated intermaxillary fixation failure in a patient weak alveolar rigidity secondary to multiple dental implants. Because single-point fixation screws were not strong enough to maintain proper occlusion, we have used Y-shaped plates to provide more rigid anchoring points for the intermaxillary wires. We suggest that this method should be considered for patients in whom conventional fixation methods are inappropriate or have failed.

Comparison of the effects of small titanium plate rigid internal fixation and intermaxillary fixation in the treatment of simple mandibular fracture / 中国基层医药

Objective To compare the clinical efficacy of small titanium plate rigid internal fixation and intermaxillary fixation in the treatment of simple mandibular fracture,and to explore the best treatment method for the reduction of fractures of the mandible.Methods 252 cases with simple fractures of the mandible were randomly divided into the two groups.126 cases of group A were treated by rigid internal fixation,126 cases of group B were treated by intermaxillary fixation.The patients were followed up for 6 months after operation.The complications,occlusion and mouth opening were compared between the two groups.And then,the data were analyzed.Results 120 cases of group A occlusal relation recovered to normal,the appearance and function were recovered well.The average mouth opening was 3.90cm.4 cases got postoperative infection,1 case titanium plate was broken.118 patients of B group occlusal relation recovered to normal,the appearance and function were restored,no case of infection and clamp plate broken.10 cases happened bad oral health condition,gingiva swell and teeth loosen.8 cases complicated with bad occlusion.There were no statistical differences between A and B group about occlusion and(x2=0.30,0.86,all P ＞ 0.05).Conclusion Two treatment methods are effective in the treatment of simple mandibular fracture,rigid skillfully master indication to get best efficacy.

Microplate Fixation without Maxillomandibular Fixation in Double Mandibular Fractures

BACKGROUND: Maxillomandibular fixation (MMF) is usually used to treat double mandibular fractures. However, advancements in reduction and fixation techniques may allow recovery of the premorbid dental arch and occlusion without the use of MMF. We investigated whether anatomical reduction and microplate fixation without MMF could provide secure immobilization and correct occlusion in double mandibular fractures. METHODS: Thirty-four patients with double mandibular fractures were treated with open reduction and internal fixation without MMF. Both fracture sites were surgically treated. For bony fixations, we used microplates with or without wire. After reduction, each fracture site was fixed at two or three points to maintain anatomical alignment of the mandible. Interdental wiring was used to reduce the fracture at the superior border and to enhance stability for 6 weeks. Mouth opening was permitted immediately. RESULTS: No major complications were observed, including infection, plate exposure, non-union, or significant malocclusion. Five patients experienced minor complications, among whom the only one patient experienced a persistant but mild malocclusion with no need for additional management. CONCLUSION: This study showed that double mandibular fractures correction with two- or three-point fixation without MMF simplified the surgical procedure, increased patient comfort, and reduced complications, due to good stability and excellent adaptation.

Microplate Fixation without Maxillomandibular Fixation in Double Mandibular Fractures

BACKGROUND: Maxillomandibular fixation (MMF) is usually used to treat double mandibular fractures. However, advancements in reduction and fixation techniques may allow recovery of the premorbid dental arch and occlusion without the use of MMF. We investigated whether anatomical reduction and microplate fixation without MMF could provide secure immobilization and correct occlusion in double mandibular fractures. METHODS: Thirty-four patients with double mandibular fractures were treated with open reduction and internal fixation without MMF. Both fracture sites were surgically treated. For bony fixations, we used microplates with or without wire. After reduction, each fracture site was fixed at two or three points to maintain anatomical alignment of the mandible. Interdental wiring was used to reduce the fracture at the superior border and to enhance stability for 6 weeks. Mouth opening was permitted immediately. RESULTS: No major complications were observed, including infection, plate exposure, non-union, or significant malocclusion. Five patients experienced minor complications, among whom the only one patient experienced a persistant but mild malocclusion with no need for additional management. CONCLUSION: This study showed that double mandibular fractures correction with two- or three-point fixation without MMF simplified the surgical procedure, increased patient comfort, and reduced complications, due to good stability and excellent adaptation.

Factors contributing to the surgical retreatment of mandibular fractures

The purpose of this retrospective study was to evaluate contributing factors in patients requiring surgical retreatment of mandibular fractures. Of all the patients with mandibular fractures who were treated using internal fixation at a trauma hospital over a seven-year period, 20 patients (4.7%) required a second surgery and thus composed the “reoperated” group. The control group comprised 42 consecutive patients with mandibular fractures who were treated at the same clinic and who healed without complications. Medical charts were reviewed for gender, age, substance abuse history, dental condition, etiology, location of fracture, degree of fragmentation, fracture exposure, teeth in the fracture line, associated facial fractures, polytrauma, time elapsed between trauma and initial treatment, surgical approach and fixation system. Statistical analyses were performed using the Statistical Package for Social Sciences (SPSS) version 20.0; descriptive statistics and the chi-squared test were used to determine differences between groups. Significant differences in substance abuse (p = 0.006), dental condition (p < 0.001), location of fracture (p = 0.010), degree of fragmentation (p = 0.003) and fracture exposure (p < 0.001) were found. With regard to age and time elapsed between trauma and initial treatment, older patients (31.4 years, SD = 11.1) and a delay in fracture repair (19.1 days, SD = 18.7) were more likely to be associated with reoperation. It was concluded that substance abuse, age, dental condition, location of fracture, degree of fragmentation, fracture exposure and the time between trauma and initial treatment should be considered contributing factors to the occurrence of complications that require surgical retreatment of mandibular fractures.

Current Concepts in the Mandibular Condyle Fracture Management Part II: Open Reduction Versus Closed Reduction

In the treatment of mandibular condyle fracture, conservative treatment using closed reduction or surgical treatment using open reduction can be used. Management of mandibular condylar fractures remains a source of ongoing controversy in oral and maxillofacial trauma. For each type of condylar fracture,the treatment method must be chosen taking into consideration the presence of teeth, fracture height, patient'sadaptation, patient's masticatory system, disturbance of occlusal function, and deviation of the mandible. In the past, closed reduction with concomitant active physical therapy conducted after intermaxillary fixation during the recovery period had been mainly used, but in recent years, open treatment of condylar fractures with rigid internal fixation has become more common. The objective of this review was to evaluate the main variables that determine the choice of an open or closed method for treatment of condylar fractures, identifying their indications, advantages, and disadvantages, and to appraise the current evidence regarding the effectiveness of interventions that are used in the management of fractures of the mandibular condyle.

Three-dimensional finite element analysis of the stress distribution and displacement in different fixation methods of bilateral sagittal split ramus osteotomy

OBJECTIVES: This study evaluated a range of fixation methods to determine which is best for the postoperative stabilization of a mandibular osteotomy using three-dimensional finite element analysis of the stress distribution on the plate, screw and surrounding bone and displacement of the lower incisors. MATERIALS AND METHODS: The model was generated using the synthetic skull scan data, and the surface model was changed to a solid model using software. Bilateral sagittal split ramus osteotomy was performed using the program, and 8 different types of fixation methods were evaluated. A vertical load of 10 N was applied to the occlusal surface of the first molar. RESULTS: In the case of bicortical screws, von-Mises stress on the screws and screw hole and deflection of the lower central incisor were minimal in type 2 (inverted L pattern with 3 bicortical repositioning screws). In the case of plates, von-Mises stress was minimal in type 8 (fixation 5 mm above the inferior border of the mandible with 1 metal plate and 4 monocortical screws), and deflection of the lower central incisor was minimal in types 6 (fixation 5 mm below the superior border of the mandible with 1 metal plate and 4 monocortical screws) and 7 (fixation 12 mm below the superior border of the mandible with 1 metal plate and 4 monocortical screws). CONCLUSION: Types 2 and 6 fixation methods provide better stability than the others.

A comparison of fixation methods using three-dimensional finite element analysis following anterior segmental osteotomy

OBJECTIVES: This study sought to evaluate fixation methods and determine the best method for the postoperative stabilization of maxillary osteotomy. For our analysis we performed a three-dimensional finite element analysis of stress distribution on the plate, screw, and surrounding bone, as well as displacement onto the plate. MATERIALS AND METHODS: We generated a model using synthetic skull scan data; an initital surface model was changed to a solid model using software. Modified anterior segmental osteotomy (using Park's method) was made using the program, and four different types of fixation methods were used. An anterior load of 100 N was applied on the palatal surface of two central incisors. RESULTS: The Type 1 (L-shaped) fixation method gave stresses of 187.8 MPa at the plate, 45.8 MPa at the screw, and 15.4 MPa at the bone around the plate. The Type 2 (I-shaped) fixation method gave stresses of 186.6 MPa at the plate, 75.7 MPa at the screw, and 13.8 MPa at the bone around the plate. The Type 3 (inverted L-shaped) fixation method gave stresses of 28.6 MPa at the plate, 29.9 MPa at the screw, and 15.3 MPa at the bone around the plate. The Type 4 (I-shaped) fixation method gave stresses of 34.8 MPa at the plate, 36.9 MPa at the screw, and 14.9 MPa at the bone around the plate. The deflection of the plates for the four fixation methods was 0.014 mm, 0.022 mm, 0.017 mm, and 0.018 mm, respectively. CONCLUSION: The Type 3 (inverted L-shaped) fixation method offers more stability than the other fixation methods. We therefore recommend this method for the postoperative stabilization of maxillary osteotomy.