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Sample records for fraturas mandibulares tratadas

  1. Fraturas do côndilo mandibular: classificação e tratamento

    Manganello Luiz C.

    2002-01-01

    Full Text Available As fraturas do côndilo mandibular, dentre as fraturas faciais, são as que apresentam o maior número de controvérsias quanto ao seu tratamento e maior dificuldade de diagnóstico. A escolha de um tratamento - cirúrgico, bloqueio maxilo-mandibular, fisioterapia elástica ou associação -, está diretamente ligado ao tipo de fratura, à idade do paciente e ao grau de alteração funcional em decorrência da fratura. Os exames por imagens são importantes para o diagnóstico e classificação da fratura, no entanto, os achados clínicos são mais relevantes na indicação de um tratamento cirúrgico ou conservador. Este trabalho tem como objetivo apresentar uma classificação das fraturas do côndilo relacionada com o seu tratamento e relatar dois casos clínicos, sendo um tratado de forma cirúrgica e o outro conservadoramente, discutindo as vantagens e desvantagens do tratamento cirúrgico, bem como as indicações e contra-indicações.

  2. Estudo epidemiológico das fraturas mandibulares em hospital público da cidade de São Paulo

    Antonio Augusto Ferreirinha Leporace

    Full Text Available OBJETIVO: Analisar a frequência epidemiológica de fraturas mandibulares correlacionando gênero, faixa etária, fatores etiológicos, localização anatômica, e tipos de traços de fratura. MÉTODOS: Estudo retrospectivo nos prontuários de 883 pacientes portadores de fraturas faciais, atendidos no Pronto Socorro do Hospital Geral de Vila Penteado, pelo Serviço de Cirurgia e Traumatologia Buco Maxilo Facial (São Paulo - Brasil, num período de três anos (janeiro de 2004 a dezembro de 2006. RESULTADOS: Dos 883 pacientes avaliados, 270 apresentaram fraturas mandibulares (30,5 %. O gênero masculino foi o mais acometido (76,7% na faixa etária de 20 a 29 anos (33,0%, o fator etiológico de maior freqüência foi acidente com veículos automotores (35,2%, o corpo da mandíbula foi a localização anatômica mais atingida (47,4% e os traços únicos prevaleceram (76,7%. CONCLUSÃO: As fraturas, em sua maioria, foram simples (traço único, localizadas em corpo mandibular, e destacadas no sexo masculino, na faixa etária de 20 a 29 anos, além do que o fator etiológico mais comum foi acidente com veículos automotores.

  3. Miniplacas de titânio na redução de fraturas mandibulares em cães e gatos: estudo de seis casos

    Gomes, Cristiano; Gouvêa, Aline Silva; Alievi, Marcelo Meller; Contesini, Emerson Antonio; Pippi, Ney Luis

    2010-01-01

    Fraturas de mandíbula e maxila são comuns em cães e gatos, correspondendo a cerca de 3 a 6% de todas as fraturas. Muitos tratamentos são propostos para a correção desse defeito, como o uso de pino intramedular, a fixação esquelética externa, a cerclagem e o uso de acrílicos e placas ósseas. Este estudo teve como objetivo avaliar o uso das mini e microplacas de titânio do sistema 2,0 e 1,5mm no tratamento de fraturas mandibulares, em cães e gatos, respectivamente. Os parafusos e as miniplacas ...

  4. Miniplacas de titânio na redução de fraturas mandibulares em cães e gatos: estudo de seis casos

    Gomes, Cristiano; Gouvea, Aline Silva; Alievi, Marcelo Meller; Contesini, Emerson Antônio; Pippi, Ney Luis

    2009-01-01

    Fraturas de mandíbula e maxila são comuns em cães e gatos, correspondendo a cerca de 3 a 6% de todas as fraturas. Muitos tratamentos são propostos para a correção desse defeito, como o uso de pino intramedular, a fixação esquelética externa, a cerclagem e o uso de acrílicos e placas ósseas. Este estudo teve como objetivo avaliar o uso das mini e microplacas de titânio do sistema 2,0 e 1,5mm no tratamento de fraturas mandibulares, em cães e gatos, respectivamente. Os parafusos e as miniplacas ...

  5. Miniplacas de titânio na redução de fraturas mandibulares em cães e gatos: estudo de seis casos Titanium miniplates in mandibular fracture repair in dogs and cats: study of 6 cases

    Cristiano Gomes; Aline Silva Gouvêa; Marcelo Meller Alievi; Emerson Antonio Contesini; Ney Luis Pippi

    2010-01-01

    Fraturas de mandíbula e maxila são comuns em cães e gatos, correspondendo a cerca de 3 a 6% de todas as fraturas. Muitos tratamentos são propostos para a correção desse defeito, como o uso de pino intramedular, a fixação esquelética externa, a cerclagem e o uso de acrílicos e placas ósseas. Este estudo teve como objetivo avaliar o uso das mini e microplacas de titânio do sistema 2,0 e 1,5mm no tratamento de fraturas mandibulares, em cães e gatos, respectivamente. Os parafusos e as miniplacas ...

  6. Fraturas em duas e três partes do úmero proximal tratadas com sutura não absorvível Two- and three-part fractures of the proximal humerus treated with non-absorbable suture

    Marco Antônio de Castro Veado

    2007-10-01

    150° (106°-210° nas fraturas em três partes, sendo verificada consolidação em valgo em nove pacientes (59% e, em varo, em dois pacientes. De acordo com o escore da UCLA, verificaram-se 88,8% de bons e excelentes resultados e 11,2% de maus resultados, para ambos os tipos de fratura. Os últimos, representados por um caso de pseudartrose e outro, por uma capsulite adesiva no pós-operatório. CONCLUSÃO: As fraturas em duas e três partes do úmero proximal podem ser satisfatoriamente tratadas com sutura não absorvível com incorporação do manguito rotador, particularmente nos idosos. Complicações relacionadas aos metais estão afastadas. Pacientes com fraturas do tubérculo maior tratados com suturas podem ter resultados similares aos daqueles com fraturas do colo cirúrgico. Embora o objetivo da cirurgia seja a reconstrução anatômica, alguma deformidade residual não impede resultado satisfatório. O método é pouco invasivo, permite estabilidade razoável dos fragmentos, com altos índices de consolidação óssea e satisfação do paciente. A cooperação do paciente é crucial para o sucesso terapêutico.OBJECTIVE: To evaluate the clinical and radiographic results of patients with two- and three-part fractures of the proximal end of the humerus treated with non-absorbable sutures and with incorporation of the rotator cuff, which allows for increased stability of the fixation, mainly in patients with low bone quality. METHODS: 19 patients were operated on, fifteen female and four male, with a mean age of 57.4 years (23-79 years and a mean follow-up of 53.4 months (seven to 144 months. Based on Neer classification, the authors found ten three-part fractures (surgical neck and larger tuberosity, and nine two-part fractures (two of the larger tuberosity and seven of the surgical neck. All of them were operated in the beach chair position with endotracheal anesthesia and brachial plexus blockade. Deltopectoral approach was used for two-part fractures of

  7. Fratura de mandíbula: análise de 293 pacientes tratados no Hospital de Clínicas da Universidade Federal de Uberlândia Mandibular fracture: analysis of 293 patients treated in the Hospital of Clinics, Federal University of Uberlândia

    Lucas Gomes Patrocínio

    2005-10-01

    Full Text Available A fratura de mandíbula ocupa o segundo lugar entre as fraturas dos ossos da face, tendo havido aumento significativo de casos nos últimos anos. A não-identificação e o tratamento inadequado podem levar à deformidade estética ou funcional permanente. OBJETIVO: Avaliar os casos submetidos à redução de fratura de mandíbula no Hospital de Clínicas da Universidade Federal de Uberlândia, entre janeiro de 1974 e dezembro de 2002. FORMA DE ESTUDO: coorte historica. PACIENTES E MÉTODO: Duzentos e noventa e três pacientes foram submetidos à redução de fratura de mandíbula e retrospectivamente foram avaliados segundo fatores relacionados a: paciente, trauma, quadro clínico e tratamento cirúrgico. RESULTADOS: Houve uma clara tendência de aumento do número de fraturas de mandíbula ao longo dos anos. Houve um predomínio no sexo masculino (4:1, com pico de ocorrência entre 20 a 29 anos. As principais causas de fratura da mandíbula neste estudo foram acidentes de trânsito e violência, perfazendo juntas 72,4%. Cento e trinta e cinco pacientes apresentavam fratura única. Os sítios mais acometidos foram, em ordem decrescente, sínfise, côndilo, ângulo, corpo, ramo e processo coronóide. Foram realizadas redução incruenta (28, cruenta (213 e associação das duas (11 pacientes, sendo que 56,8% dos pacientes foram tratados nos primeiros 3 dias e 50,4% recebeu a alta hospitalar até o primeiro pós-operatório. Cerca de 10% dos pacientes apresentaram complicações, sendo osteomielite a mais freqüente. CONCLUSÃO: A incidência de fraturas de mandíbula foi marcadamente maior no sexo masculino, durante a terceira década de vida. A causa mais comum foi o acidente de trânsito e as regiões mais atingidas foram sínfise e côndilo. As fraturas isoladas de mandíbula ocorreram em mais de metade dos casos. A maioria dos pacientes foi tratada nos primeiros três dias e recebeu alta até o primeiro pós-operatório. A redução cruenta

  8. Miniplacas de titânio na redução de fraturas mandibulares em cães e gatos: estudo de seis casos Titanium miniplates in mandibular fracture repair in dogs and cats: study of 6 cases

    Cristiano Gomes

    2010-05-01

    Full Text Available Fraturas de mandíbula e maxila são comuns em cães e gatos, correspondendo a cerca de 3 a 6% de todas as fraturas. Muitos tratamentos são propostos para a correção desse defeito, como o uso de pino intramedular, a fixação esquelética externa, a cerclagem e o uso de acrílicos e placas ósseas. Este estudo teve como objetivo avaliar o uso das mini e microplacas de titânio do sistema 2,0 e 1,5mm no tratamento de fraturas mandibulares, em cães e gatos, respectivamente. Os parafusos e as miniplacas utilizadas são compostos de titânio, e o formato dependeu da localização e do tipo de fratura. No total, foram avaliados seis casos, dos quais quatro apresentaram completa consolidação, sendo as placas utilizadas como método único ou associado com fio de aço ou imobilização com focinheira. As causas de insucesso foram a quebra da placa em um dos casos e a contaminação do enxerto, com posterior osteomielite em decorrência da deiscência dos pontos em outro caso. O emprego das miniplacas de titânio mostrou-se eficaz na maioria dos casos testados, promovendo fixação rígida e retorno funcional adequado, sendo utilizado como método único ou associado com outras técnicas de osteossíntese.Jaw and maxilla fractures are common in dogs and cats, representing 3-6% of all fractures. Numerous techniques are proposed to reduce the defect such as intramedullary pin, percutaneous skeletal fixation, circumferential wiring, acrylic splints and bone plating. This study aimed to evaluate the use of 2.0mm and 1.5mm titanium microplates in the treatment of mandibular fractures in dogs and cats, respectively. The screws and the mini and microplates used were composed of titanium and their format depended on the location and type of fracture. A total of 6 cases were selected and 4 of them had complete consolidation using the mini microplate method alone or associated with steel wire or tie with noseband. In one case the failure occurred due to

  9. Fraturas odontomaxilares e mandibulares em eqüídeos tratados por diferentes técnicas de osteossíntese Odontomaxillares and mandibularies fractures in equides treated with different osteosynthesis techniques

    G.E.S. Alves

    2008-12-01

    Full Text Available Oito eqüinos e um muar com fraturas odontomaxilares e mandibulares foram tratados com diferentes técnicas de osteossíntese modificadas, consistindo de cerclagens associadas ou não a bandas de tensão, placa de neutralização e pino intraosseo, sendo este aplicado com metodologia não encontrada na literatura consultada. Os procedimentos cirúrgicos nos eqüideos foram realizados com os animais em estação mediante contenção física, em brete, e química, com sedação ou neuroleptoanalgesia associada a bloqueios anestésicos regionais. Os animais apresentaram capacidade de mastigação e ingestão voluntária no pós-operatório imediato e recuperação óssea adequada.Eight equines and one mule with odontomaxillaries and mandibularies fractures were treated with different osteosynthesis modified techniques, consisting of cerclages with or without tension bands, neutralization plates, and intraosseous pin applied by a methodology which was not found in the literature. The surgery procedures in equides were performed with the animals in stand position under physical contention, sedation, or neuroleptoanalgesy and regional nerve block. All animals were able to eat voluntarily in the immediate post-operatory time and had good bone recuperation.

  10. Biomechanical analysis of titanium plate systems in mandibular condyle fractures: a systematized literature review Análise biomecânica de sistemas de placas de titânio em fraturas de côndilo mandibular: uma revisão sistematizada da literatura

    Fábio Wildson Gurgel Costa

    2012-06-01

    Full Text Available PURPOSE: To conduct a systematized review of the literature about the main methodologies used to evaluate the biomechanical fixation systems with titanium plates in fractures of the mandibular condyle. METHODS: A systematized review of literature was performed in the electronic databases PubMed, EMBASE, LILACS and MEDLINE without restriction of the publication date. The eligibility criteria were laboratory studies involving mandibular condyle fractures, studies using titanium plates, biomechanical studies, in vitro and computational studies involving the finite element method (FEM. RESULTS: Eleven articles that met the eligibility criteria were selected, including seven articles involving in vitro studies and four studies with biomechanical analysis by using FEM. CONCLUSION: Although few articles have used the finite element method, the results of in vitro studies were similar to those found in computational studies, regarding to the stable use of two titanium miniplates.OBJETIVO: Realizar uma revisão sistematizada da literatura sobre as principais metodologias empregadas na avaliação biomecânica de sistemas de fixação com placas de titânio em fraturas de côndilo mandibular. MÉTODOS: Foi realizada uma revisão sistematizada da literatura nas bases de dados eletrônicas PubMed, EMBASE, LILACS e MEDLINE sem restrição quanto à data de publicação. Os critérios de elegibilidade foram estudos laboratoriais envolvendo fraturas de côndilo mandibular, estudos utilizando placas de titânio, estudos biomecânicos, estudos in vitro e estudos computacionais envolvendo o método de elementos finitos (MEF. RESULTADOS: Foram selecionados 11 artigos que se enquadraram nos critérios de elegibilidade, incluindo sete artigos envolvendo estudos in vitro e quatro utilizando análise biomecânica através do MEF. CONCLUSÃO: Embora poucos artigos tenham utilizado o método de elementos finitos, os resultados das pesquisas in vitro assemelham-se aos

  11. Fraturas do côndilo mandibular: análise clínica retrospectiva das indicações e do tratamento Evaluation of condylar fractures treatment

    Eduardo Fausto de Andrade Filho

    2003-01-01

    Full Text Available OBJETIVO: Analisamos 40 pacientes com fraturas no processo condilar da mandíbula, tratados pelo método fechado (bloqueio maxilomandibular ou conservador ou aberto (redução direta no foco de fratura com ou sem osteossíntese, no período de janeiro de 1993 a janeiro de 1999 no Setor de Trauma Maxilofacial da Disciplina de Cirurgia Plástica da UNIFESP-EPM. MÉTODO: Avaliamos clinicamente estes pacientes através da palpação da articulação têmporomandibular, observação da simetria mandibular, oclusão dentária, desvio à abertura de boca e abertura máxima interincisal; além de questionário sobre queixas na ATM, disfunção mastigatória e satisfação do tratamento realizado. RESULTADOS: Foi encontrado um índice de resultados satisfatórios de no mínimo 70% nos pacientes submetidos ao bloqueio. No método conservador esse índice foi de no mínimo 42,9%, e nos submetidos à redução com fio de aço de no mínimo 28,6%, sem diferença significante entre os diversos exames clínicos. O índice de dor na ATM entre os pacientes tratados pelo método fechado foi de 3,7% e pelo aberto de 15,4%. A disfunção mastigatória foi de 22,2% no método fechado e 15,4% no aberto; sendo que foram encontrados somente 7,1% de pacientes insatisfeitos com o tratamento fechado. Não houve diferença significante entre os resultados dos métodos. CONCLUSÃO: Os métodos fechado (BMM e conservador e aberto, com redução e osteossíntese com fio de aço, trouxeram resultados clínicos satisfatórios em avaliação superior a seis meses. Concluiu-se também que não há diferença entre os resultados de queixas após o tratamento aberto ou fechado, na opinião dos pacientes.BACKGROUND: We analysed 40 patients with mandibular condylar process fractures, treated through the closed (intermaxilary fixation or conservatively or open methods (wire internal fixation,titanium miniplates, bone reduction or articular exploration, from January 1993 to January

  12. Fratura segmentar da clavícula Segmental clavicle fracture

    Evander Azevedo Grossi

    2011-01-01

    O objetivo deste trabalho é apresentar um caso incomum de fratura segmentar da clavícula associada a fratura de arco costal ipsilateral. Apesar da clavícula ser muito superficial, podem ocorrer casos despercebidos das duas fraturas, pois geralmente estes pacientes sofrem politraumatismos. É descrito o caso de um paciente que apresentou fratura da diáfise e da extremidade lateral da clavícula que foi operado e obtido excelente resultado. Casos semelhantes foram revistos na literatura e discuti...

  13. Desenvolvimento puberal em meninas tratadas de LLA

    Monteiro I.M.M.

    1998-01-01

    Full Text Available OBJETIVO: Com o objetivo de avaliar o desenvolvimento puberal após o tratamento de leucemia linfóide aguda (LLA na infância, foi realizado um estudo retrospectivo, em meninas tratadas de janeiro de 1980 a janeiro de 1991, no Centro de Investigações Hematológicas "Dr. Domingos A. Boldrini", em Campinas-SP. CASUÍSTICA E MÉTODO: Foram selecionadas 42 meninas, tratadas antes da puberdade com quimioterapia sistêmica e intratecal e radioterapia cranial, utilizando doses de 18 ou 24 Grays (Gy. RESULTADOS: As idades médias da telarca, pubarca e menarca foram inferiores às do grupo-controle, embora com significância estatística apenas para a idade da telarca. Não houve diferenças entre os grupos tratados com 18 ou 24Gy. As meninas tratadas antes dos cinco anos de idade apresentaram idade média da menarca estatisticamente inferior àquelas tratadas após cinco anos e em relação ao grupo-controle. CONCLUSÃO: Os resultados mostraram que o desenvolvimento puberal em meninas tratadas de LLA na infância foi mais precoce que o de meninas saudáveis.

  14. Fraturas do planalto tibial Tibial plateau fractures

    Maurício Kfuri Júnior

    2009-01-01

    Full Text Available As fraturas do planalto tibial são lesões articulares cujos princípios de tratamento envolvem a redução anatômica da superfície articular e a restauração funcional do eixo mecânico do membro inferior. Contribuem para a tomada de decisões no tratamento dessas fraturas o perfil do paciente, as condições do envelope de tecidos moles, a existência de outros traumatismos associados e a infraestrutura disponível para abordagens cirúrgicas. Para as fraturas de alta energia, o tratamento estagiado, seguindo o princípio do controle de danos, tem como prioridade a manutenção do alinhamento do membro enquanto se aguarda a resolução das más condições de tecidos moles. Já nos traumas de baixa energia, desde que os tecidos moles não sejam um fator adverso, o tratamento deve ser realizado em tempo único, com osteossíntese definitiva. Fixação estável e movimento precoce são variáveis diretamente relacionadas com os melhores prognósticos. Desenvolvimentos recentes, como os implantes com estabilidade angular, substitutos ósseos e imagens tridimensionais para controle intraoperatório, deverão contribuir para cirurgias menos invasivas e melhores resultados.Tibial plateau fractures are joint lesions that require anatomical reduction of joint surface and functional restoration of mechanical axis of a lower limb. Patient profile, soft tissue conditions, presence of associated injuries and the available infrastructure for the treatment all contribute to the decision making about the best treatment for these fractures. High-energy fractures are usually approached in a staged manner respecting the principle of damage control, and are primarily targeted to maintain limb alignment while the resolution unfavorable soft tissue conditions is pending. Low-energy trauma can be managed on a single-stage basis, provided soft tissues are not an adverse factor, with open reduction and internal f-ixation. Stable fixation and early painless joint

  15. Riego subsuperficial con aguas residuales tratadas

    Crespi, Raúl; Camacho, Emilio; Polo, María José

    2009-01-01

    La reutilización de aguas residuales tratadas para riego por goteo subsuperficial (RGS) de cultivos extensivos, es una práctica reconocida mundialmente, siendo la obturación de emisores un serio problema en la operación de estos sistemas. Durante el ciclo agrícola 2002/03, se realizó un ensayo experimental usando dos tipos de agua: limpia (AL) y residual tratada (AR) en un sistema mixto combinando un reactor biológico con laguna de maduración y tres tipos de protectores del emisor: micro dosi...

  16. Fraturas do côndilo occipital: atualização da experiência em nosso serviço e revisão da literatura

    Henrique Gomes Noronha

    2013-01-01

    Full Text Available Apresentamos neste trabalho a casuística de fraturas de côndilo occipital diagnosticada e tratada em nosso serviço nos últimos 10 anos. O presente estudo dá continuidade ao levantamento epidemiológico já realizado no período de 1993 a 2000. No período de 2001 a 2011, foram diagnosticados seis casos de fraturas de côndilo occipital e todos eles foram tratados de forma conservadora, exceto um, no qual se colocou um halo craniano inicialmente. Nos cinco casos tratados de modo conservador, observaram-se bons resultados, com estabilidade do segmento nas radiografias funcionais, ausência de limitação de movimento e ausência de dor. O paciente que foi tratado com halo apresentava tetraplegia parcial FRANKEL C e fraturas associadas (C5, C6, L1 e L2 e não apresentou melhora do quadro neurológico, verificando-se limitação do movimento cervical. Destacamos ainda a importância da investigação ativa de lesões na transição occipitocervical, principalmente nos casos decorrentes de trauma de alta energia, pois além das implicações clínicas da detecção precoce da fratura, o melhor emprego dos exames subsidiários tem sido um fator relevante para o aumento da incidência de fraturas do côndilo occipital. Como é historicamente relatado, o tratamento conservador ainda é eficaz e com baixo índice de complicações, e o tratamento cirúrgico deve ser indicado em casos com instabilidade definida.

  17. Bases tratadas con cemento, en California

    Chinchilla, M.

    1962-05-01

    Full Text Available El uso de bases tratadas con cemento para autopistas se inició en el Estado de California en 1938, empleándose para carreteras con determinadas condiciones de tráfico. Inicialmente, se especificó el uso obligatorio de plantas mezcladoras para asegurar el debido control de las proporciones adecuadas.

  18. Fratura segmentar da clavícula Segmental clavicle fracture

    Evander Azevedo Grossi

    2011-01-01

    Full Text Available O objetivo deste trabalho é apresentar um caso incomum de fratura segmentar da clavícula associada a fratura de arco costal ipsilateral. Apesar da clavícula ser muito superficial, podem ocorrer casos despercebidos das duas fraturas, pois geralmente estes pacientes sofrem politraumatismos. É descrito o caso de um paciente que apresentou fratura da diáfise e da extremidade lateral da clavícula que foi operado e obtido excelente resultado. Casos semelhantes foram revistos na literatura e discutida a conduta.The aim here was to present an unusual case of segmental clavicle fracture associated with ipsilateral rib fracture. Although the clavicle is very superficial, undetected cases of both types of fracture may occur, because these patients usually suffer multiple trauma. The case of a patient with a fracture of the diaphysis and lateral extremity of the clavicle is described: the patient was treated surgically and an excellent result was achieved. Similar cases in the literature are reviewed and their management is discussed.

  19. Mandibular ameloblastomas

    Masip, M.J.; Arana, E.; Beltran, J.; Garcia, J.L.; Cifrian, C.; Aparisi, F.

    1995-01-01

    We present a retrospective review of 39 cases of mandibular ameloblastoma that were assessed in terms of patient age and sex, duration and clinical signs at the time of diagnosis. The associated plain radiology, CT and MR signs are also reviewed. It usually presented as a slowly growing, painless mass. According to radiological findings, most of the ameloblastomas studied were extensive, involving the mandibular branch, angle and molar area; the lesions were expanding, unilocular or multilocular, with erosion of the dental apex. CT disclosed cystic areas of low attenuation. The images of the three patients studied by MR presented low signal intensity in T1-weighed sequences and hyperintense signal in t2-weighted sequences. 9 refs

  20. ANÁLISE CLÍNICA E HISTOLÓGICA DA UTILIZAÇÃO DA RESINA ACRÍLICA AUTOPOLIMERIZÁVEL NAS FRATURAS DE MANDÍBULA E MAXILA E SEPARAÇÃO DA SÍNFISE MENTONIANA EM CÃES E GATOS CLINICAL AND HISTOLOGICAL EVALUATION OF ACRYLIC RESIN IN THE FRACTURE OF THE MANDIBLE AND MAXILLA AND SEPARATION OF MANDIBULAR SYMPHISIS IN DOGS AND CATS

    Marco Antonio Gioso

    2001-04-01

    Full Text Available O trabalho foi desenvolvido em duas fases. A primeira constou de aplicação de resina acrílica autopolimerizável sobre dentes de cães experimentais, sem condicionamento ácido do esmalte dental; a gengiva foi analisada histologicamente nos períodos de um, três, sete, 14, 21 e 30 dias. A segunda fase foi conduzida em 20 cães e 10 gatos com fraturas do sistema estomatognático, atendidos no Ambulatório Central da FMVZ/USP. Nessa segunda fase, clínica, foi aplicado condicionamento ácido do esmalte. A resina era usada nas fraturas rostrais às raízes distais do primeiro molar inferior e do quarto pré-molar superior, bem como na separação da sínfise mentoniana. Os resultados da primeira fase mostraram que mesmo sem o condicionamento ácido houve aderência da resina acrílica sobre os dentes, embora houvesse necessidade de maior volume do material, o que provocou ulcerações dos tecidos moles da boca. Essa fase também evidenciou, à sondagem, que o epitélio de aderência sulcular permaneceu aderido, além de gengivite, ulceração da gengiva, língua e mucosa alveolar. A análise histológica revelou predominantemente ulceração dos tecidos em contato com a resina. Na segunda fase, todos os animais evidenciaram consolidação óssea das fraturas, além de gengivite e ulceração. Lesões periodontais foram encontradas em dois animais dos quais a resina foi removida tardiamente, com quatro e 12 meses após a aplicação, respectivamente. Em ambas as fases, os animais adaptaram-se bem à resina sobre os dentes.This paper was performed in two phases. In the first one, the stability of the acrylic resin over the teeth of dogs, without enamel acid conditioning, the clinical and histological reaction on the gingiva were analyzed in periods of 1, 3, 7, 14, 21 and 30 days. The second phase was conducted in 20 dogs and 10 cats, with acid etching technique. The resin was used in the rostral fractures to the distal roots of the lower first

  1. Síndrome compartimental pós-fratura de platô tibial

    Pitta,Guilherme Benjamin Brandão; Santos,Thays Fernanda Avelino dos; Santos,Fernanda Thaysa Avelino dos; Costa Filho,Edelson Moreira da

    2014-01-01

    As fraturas de platô tibial são relativamente raras e representam, aproximadamente, 1,2% de todas as fraturas. A tíbia, por sua localização subcutânea e pobre cobertura muscular, está exposta a sofrer grandes quantidades de traumatismos, que não são somente fraturas, mas também lesões por achatamento, contusões severas, entre outras que, em um determinado momento, podem causar no enfermo a síndrome compartimental. É relatad...

  2. Effects of the condylar process fracture on facial symmetry in rats submitted to protein undernutrition Efeitos da fratura do processo condilar na simetria facial em ratos submetidos à desnutrição protéica

    Lucimar Rodrigues

    2011-04-01

    Full Text Available PURPOSE: To investigate the facial symmetry of rats submitted to experimental mandibular condyle fracture and with protein undernutrition (8% of protein by means of cephalometric measurements. METHODS: Forty-five adult Wistar rats were distributed in three groups: fracture group, submitted to condylar fracture with no changes in diet; undernourished fracture group, submitted to hypoproteic diet and condylar fracture; undernourished group, kept until the end of experiment, without condylar fracture. Displaced fractures of the right condyle were induced under general anesthesia. The specimens were submitted to axial radiographic incidence, and cephalometric mensurations were made using a computer system. The values obtained were subjected to statistical analyses among the groups and between the sides in each group. RESULTS: There was significative decrease of the values of serum proteins and albumin in the undernourished fracture group. There was deviation of the median line of the mandible relative to the median line of the maxilla, significative to undernutrition fracture group, as well as asymmetry of the maxilla and mandible, in special in the final period of experiment. CONCLUSION: The mandibular condyle fracture in rats with proteic undernutrition induced an asymmetry of the mandible, also leading to consequences in the maxilla.OBJETIVO: Investigar a simetria facial de ratos submetidos à fratura experimental de côndilo mandibular e com desnutrição protéica (8% de proteína por meio de mensurações cefalométricas. MÉTODOS: 45 ratos Wistar adultos foram distribuídos em três grupos: grupo fraturado, submetido a fratura condilar sem alteração na dieta; grupo fraturado desnutrido, submetido a dieta hipoprotéica e fratura condilar; grupo desnutrido, mantido até o final do experimento, sem fratura condilar. Fraturas com desvio foram feitas no côndilo direito com anestesia geral. Os espécimes foram submetidos à incidência radiogr

  3. Osteorradionecrose resultando em fratura patológica de mandíbula: relato de caso clínico = Osteoradionecrosis resulting in pathological fracture of jaw: relate of clinical case

    Gomes, Ana Claudia Amorim

    2007-01-01

    Full Text Available Introdução: A osteorradionecrose (ORN é uma severa complicação da radioterapia em pacientes portadores de câncer de cabeça e pescoço. Dependendo da localização e extensão da lesão osteorradionecrótica, pode trazer sinais e sintomas como dor, odor fétido, disgeusia, disestesia ou anestesia, trismo, dificuldade de mastigação, deglutição e fonação, formação de fístula, fratura patológica e infecção local ou sistêmica. Objetivo: O presente trabalho teve como objetivo relatar um caso clínico de um paciente portador de osteorradionecrose em corpo mandibular, com presença de infecção, e que resultou em fratura patológica mandibular. Desenvolvimento do caso: Foram realizados esquemas rigorosos de antibioticoterapia, associados a oxigenoterapia hiperbárica para permitir o tratamento da fratura mandibular com fixação interna rígida, após o tratamento da infecção secundária, na intenção de eliminar a osteorradionecrose, a qual no caso em questão houve reparação e ausência de qualquer sinal clínico radiográfico de recidiva, num acompanhamento de um ano de pós-operatório. Conclusão: Diante da severidade da doença, esgotadas as possibilidades conservadoras e diante de uma necessidade cirúrgica pela fratura patológica, pôde-se observar que o uso da oxigenoterapia hiperbárica resultou em uma satisfatória cicatrização da ferida cirúrgica, bem como a manutenção da saúde dos tecidos no caso em questão

  4. Efeitos da fratura do arco zigomático no crescimento facial em ratos jovens Effect of zygomatic arch fracture on facial growth in young rats

    Elza Maria Villanova Fernandes ROCHA

    1999-01-01

    Full Text Available Os efeitos da fratura unilateral do arco zigomático no crescimento facial foram avaliados através de mensurações cefalométricas. Fratura com desvio medial no lado direito foi realizada em ratos com um mês de idade. Os animais foram sacrificados com três meses de idade e sua mandíbula foi desarticulada. O crânio foi submetido à tomada radiográfica axial e as hemimandíbulas à norma lateral. As mensurações foram realizadas através de um sistema de computador. Foi verificada diferença significante a menor para a altura do corpo e do ramo da mandíbula. Não houve diferença significante para a profundidade da fossa infratemporal, bem como para as diversas mensurações na maxila e para o comprimento mandibular. A tendência de retorno do arco zigomático com desvio à sua posição original foi confirmada.The effect of unilateral zygomatic arch fracture on facial growth was analysed by means of cephalometric measurements. Medially displaced fracture of the right side was achieved in one month old rats. Reaching three months the animals were sacrified, and their mandibles disarticulated. The skull was submitted to axial radiographic incidence and the hemimandibles to a lateral radiographic incidence. The measurements were made through a computer system. Significant differences were verified with a decrease in body height and ramus of the mandible. There was no significant difference in infratemporal fossae depth, as well as in diverse measurements in maxilla and in mandibular lenght. The tendency of the fractured arch to return to its original position was confirmed.

  5. Fraturas: origem e tratamentos - doi: 10.5102/ucs.v3i2.561

    Gustavo Rocha Velloso

    2008-04-01

    Full Text Available As fraturas representam uma fadiga de estrutura óssea. O estudo dos conceitos básicos sobre a organização do tecido ósseo, o mecanismo indutor das fraturas e o processo de consolidação são temas importantes da moderna traumatologia. Alterações estruturais nos ossos ocorrem em decorrência de complexo sistema de forças deformadoras. As lesões podem ocasionar alterações em diferentes tecidos ósseos. O tratamento das fraturas é usualmente realizado pela fixação interna e externa, mas experimentos modernos apontam para que o processo biológico de reparação das fraturas seja melhor do que a fixação metálica.

  6. Correlação entre tempo para o tratamento cirúrgico e mortalidade em pacientes idosos com fratura da extremidade proximal do fêmur Correlation between time until surgical treatment and mortality among elderly patients with fractures at the proximal end of the femur

    Gustavo Gonçalves Arliani

    2011-04-01

    Full Text Available OBJETIVO: O objetivo primário do estudo é analisar a possível associação entre o atraso para a realização do tratamento cirúrgico e mortalidade em pacientes idosos com fratura da extremidade proximal do fêmur. MÉTODOS: Foram estudados 269 pacientes com fraturas da extremidade proximal do fêmur (fraturas do colo do fêmur e fraturas intertrocanterianas, tratadas cirurgicamente no Hospital São Paulo - Unifesp-SP, no período de janeiro de 2003 a dezembro de 2007. Foram analisados e comparados com a literatura referente ao assunto os seguintes atributos: sexo, idade, tipo de fratura, classificação da mesma, lado acometido, síntese utilizada, mecanismo de trauma, tempo de internação, tempo para cirurgia, comorbidades associadas, hemograma de entrada, tipo de anestesia, necessidade de transfusão sanguínea, dia da semana e estação do ano da fratura. RESULTADOS: O estudo apresentou correlação entre maior número de comorbidades clínicas, maior tempo de internação e utilização de anestesia geral na cirurgia com maior mortalidade dos pacientes. CONCLUSÃO: Não houve associação entre tempo para realização da cirurgia e mortalidade.OBJECTIVE: The primary aim of this study was to analyze the possible association between delay in receiving surgical treatment and mortality among elderly patients with fractures at the proximal end of the femur. METHODS: 269 patients with fractures at the proximal end of the femur (femur neck and intertrochanteric fractures who were treated surgically at Hospital São Paulo, UNIFESP, São Paulo, between January 2003 and December 2007, were studied. Sex, age, type of fracture, classification of the fracture, affected side, synthesis used, trauma mechanism, length of hospitalization, length of surgery, associated comorbidities, hemogram at admission, type of anesthesia, need for blood transfusion, day of the week and season of the year of the fracture were analyzed and compared with the literature

  7. Dispositivo de tração do membro superior para osteossínteses intramedulares bloqueadas anterógradas de fraturas diafisárias de úmero Upper limb traction device for anterograde intramedullary locked nail of humeral shaft fractures

    Mário Chaves Corrêa

    2010-06-01

    Full Text Available As fraturas diafisárias de fêmur e tíbia no adulto são, na sua maioria, tratadas cirurgicamente, geralmente através de osteossínteses intramedulares bloqueadas. Algumas fraturas diafisárias cominutivas e/ou muito desviadas podem representar um verdadeiro desafio técnico. As mesas de fraturas (ou ortopédicas, que permitem a estabilização instrumental vertical, horizontal e rotacional do membro, facilitam enormemente as manobras de redução e de colocação do implante e são amplamente utilizadas pelos cirurgiões ortopédicos. As fraturas diafisárias de úmero são, na sua maioria, tratadas não cirurgicamente. Entretanto, algumas requerem o tratamento cirúrgico, cujas indicações estão bem definidas na literatura. Podem ser fixadas através de placas ou de hastes intramedulares por via anterógrada ou retrógrada. No úmero, as manobras de redução da fratura e estabilização do membro para a implantação da haste intramedular são realizadas manualmente, geralmente por dois auxiliares e, por serem sujeitas à fadiga muscular, podem ser menos eficientes. O objetivo deste trabalho é apresentar um dispositivo externo de tração do membro superior para utilização em osteossínteses intramedulares bloqueadas anterógradas de fraturas diafisárias de úmero que permite a estabilização vertical, horizontal e rotacional do membro superior, de maneira similar àquela utilizada para os membros inferiores. O dispositivo é portátil, de construção simples, e pode ser instalado em qualquer mesa cirúrgica equipada com trilhos laterais. Foi utilizado no tratamento cirúrgico de 29 fraturas diafisárias de úmero com haste intramedular bloqueada anterógrada. Nossa experiência foi extremamente positiva. Não tivemos nenhuma complicação relacionada à sua utilização, que acreditamos ter facilitado, de maneira notável, os procedimentos cirúrgicos.Diaphyseal fractures of the femur and tibia in adults are mostly treated

  8. Fratura supracondiliana de úmero em crianças: fixação com dois fios de Kirschner cruzados Supracondylar fracture of the humerus in children: fixation with two crossed Kirschner wires

    Roni Azevedo Carvalho

    2012-01-01

    Full Text Available OBJETIVO: Analisar e apresentar os resultados de fraturas supracondilianas instáveis de úmero em crianças, tratadas cirurgicamente com redução e fixação percutânea com dois fios de Kirschner cruzados. MÉTODOS: Foi realizado estudo transversal com 20 crianças, considerando sexo, idade na época da fratura e no momento da análise, lateralidade, tipo e mecanismo de fratura, complicações pós-operatórias, variáveis radiográficas e clínicas. RESULTADOS: Observaram-se 10 fraturas à esquerda e 10 à direita. A idade na fratura variou de dois a 13 anos (média 5,9 anos ± 2,48. Três fraturas foram classificadas como tipo II e 17 do tipo III. O tempo de seguimento variou de quatro meses a três anos. O ângulo de Baumann variou de 69 a 100 (média 78,3, sendo observada a presença de cúbito varo em quatro pacientes (com valores variando de 84 a 100. Segundo os critérios de Flynn modificados, obtiveram-se 20 casos satisfatórios, 17 excelentes (85%, dois bons (10% e um regular (5%. Dois pacientes apresentaram déficit da amplitude de movimento, dois parestesia no território cubital e uma criança apresentou neuropraxia transitória do nervo ulnar por seis semanas. CONCLUSÃO: A fixação percutânea com dois fios de Kirschner cruzados, quando realizada com visualização direta e isolamento do nervo ulnar, permite bons resultados.OBJECTIVE: To analyze and present the surgical results from unstable supracondylar fractures of the humerus in children, treated by means of reduction and percutaneous fixation using two crossed Kirschner wires. METHODS: A cross-sectional study was conducted on 20 children, taking into consideration sex, age at the time of the fracture, age at the time of the assessment, side affected, type and mechanism of trauma, postoperative complications and radiographic and clinic variables. RESULTS: Ten fractures were observed in the left arm and ten in the right arm. The age at the time of the fracture ranged from 2

  9. Terapêutica interdisciplinar para fratura cominutiva de côndilo por projétil de arma de fogo: enfoque miofuncional Interdisciplinary approach for comminuted condyle fracture of by firearms: myofunctional focus

    Esther Mandelbaum Gonçalves Bianchini

    2010-10-01

    Full Text Available TEMA: ferimentos causados por projéteis de arma de fogo apresentam alta incidência na região da cabeça e face. A articulação temporomandibular pode estar envolvida, além de estruturas anatômicas importantes como o nervo facial, necessitando de equipe multidisciplinar para efetuar tratamento adequado. PROCEDIMENTOS: apresentação de caso clínico de fratura condilar cominutiva causada por projétil de arma de fogo tratado de forma não-cirúrgica associado à terapia miofuncional orofacial. Paciente encaminhado para avaliação e procedimentos fonoaudiológicos após conduta da equipe de cirurgia bucomaxilofacial, sem remoção do projétil, alojado superficialmente, próximo da origem do músculo esternocleidomastóideo à direita, com fratura condilar cominutiva e lesão do nervo facial. Foram aspectos observados em avaliação: mordida aberta anterior, importante redução da amplitude dos movimentos mandibulares com desvios para o lado acometido, ausência de lateralidade contralateral, dor muscular, paralisia e parestesia em terço médio e superior da hemiface direita. Realizadas sessões de terapia miofuncional seguindo protocolo específico para traumas de face constando de: drenagem de edema; manipulações na musculatura levantadora da mandíbula ipsilateral; ampliação e correção dos movimentos mandibulares; procedimentos específicos referentes à paralisia facial e reorganização funcional direcionada. RESULTADOS: após oito semanas de terapia os resultados obtidos mostram restabelecimento de amplitude e da simetria dos movimentos mandibulares, reorganização da mastigação, adequação da deglutição e fala, remissão da sintomatologia dolorosa e remissão da paralisia do terço médio. CONCLUSÃO: o tratamento conservador da fratura por meio da terapia miofuncional orofacial resultou na reabilitação funcional da mandíbula e face dirigindo os movimentos e estimulando a adequação das funções estomatogn

  10. Facial symmetry evaluation after experimentally displaced condylar process fracture in methotrexate treated rats Avaliação da simetria facial após fratura experimental com desvio do processo condilar em ratos tratados com metotrexato

    Samantha Cristine Santos Xisto Braga Cavalcanti

    2012-03-01

    Full Text Available PURPOSE: To investigate the facial symmetry of high and low dose methotrexate (MTX treated rats submitted to experimentally displaced mandibular condyle fracture through the recording of cephalometric measurements. METHODS: One hundred male Wistar rats underwent surgery using an experimental model of right condylar fracture. Animals were divided into four groups: A - saline solution (1mL/week; B - dexamethasone (DEX (0,15mg/Kg; C - MTX low dose (3 mg/Kg/week; D - MTX high dose (30 mg/Kg. Animals were sacrificed at 1, 7, 15, 30 and 90 days postoperatively (n=5. Body weight was recorded. Specimens were submitted to axial radiographic incidence, and cephalometric mensurations were made using a computer system. Linear measurements of skull and mandible, as well as angular measurements of mandibular deviation were taken. Data were subjected to statistical analyses among the groups, periods of sacrifice and between the sides in each group (α=0.05. RESULTS: Animals regained body weight over time, except in group D. There was reduction in the mandibular length and also changes in the maxilla as well as progressive deviation in the mandible in relation to the skull basis in group D. CONCLUSION: Treatment with high dose methotrexate had deleterious effect on facial symmetry of rats submitted to experimentally displaced condylar process fracture.OBJETIVO: Avaliar a simetria facial de ratos tratados com metotrexato (MTX, em dose alta e baixa, submetidos à fratura experimental do processo condilar com desvio por meio de mensurações cefalométricas. MÉTODOS: Cem ratos Wistar machos foram submetidos a procedimento cirúrgico utilizando modelo experimental de fratura de côndilo do lado direito. Os animais foram distribuídos em quatro grupos: A - soro fisiológico (1mL/semana; B - dexametasona (DEX (0,15mg/Kg; C - MTX baixa dose (3mg/Kg/semana; D - MTX alta dose (30mg/Kg. Os períodos de sacrifício foram de 1, 7, 15, 30 e 90 dias de pós-operatório (n=5

  11. Measuring mandibular ridge reduction

    Steen, W.H.A.

    1984-01-01

    This thesis investigates the mandibular reduction in height of complete denture wearers and overdenture wearers. To follow this reduction in the anterior region as well as in the lateral sections of the mandible, an accurate and reproducible measuring method is a prerequisite. A radiologic technique offers the best chance. A survey is given of the literature concerning the resorption process after the extraction of teeth. An oblique cephalometric radiographic technique is introduced as a promising method to measure mandibular ridge reduction. The reproducibility and the accuracy of the technique are determined. The reproducibility in the positioning of the mandible is improved by the introduction of a mandibular support which permits a precise repositioning of the edentulous jaw, even after long periods of investigation. (Auth.)

  12. Tratamento das fraturas do processo odontóide Treatment of odontoid fractures

    Pedro Augusto Pontin

    2011-01-01

    Full Text Available OBJETIVO: Este artigo faz a avaliação retrospectiva clínica e radiológica das fraturas do odontóide de 20 pacientes atendidos no IOT-HCFMUSP, durante o período de 2004-2010. MÉTODOS: Foi realizado a estratificação destas fraturas segundo sua classificação (AO/Anderson e D'Alonzo, perfil epidemiológico, tipo de tratamento, tempo de consolidação e complicações. RESULTADOS: Observou-se maior número de casos da fratura do odontóide em pacientes do sexo masculino (4:1, com idade entre 3ª e 4ª década de vida (60%, vítimas de quedas de altura (60% e acidentes automobilísticos (25% como principais mecanismos de trauma, e 15% dos casos apresentaram-se com déficit neurológico. A fraturas do odontóide de maior prevalência foram as do tipo II (55%, seguidas pelas fraturas do tipo III (40%. Os tratamentos mais empregados nas fraturas do tipo II e III foram, respectivamente, o cirúrgico (73% e conservador (87,5%. A consolidação ocorreu em até 16 semanas para 87,5% dos casos de tratamento cirúrgico e para 54,5% dos tratados conservadoramente. Não houve casos de pseudoartrose. CONCLUSÃO: O tratamento cirúrgico das fraturas do odontóide do tipo II apresentou resultados satisfatórios em relação ao tempo consolidação e baixa incidência de complicações, bem como o tratamento conservador destinado às fraturas do tipo III.Nivel de Evidência IV, série de casos.OBJECTIVE: This article describes a clinical and radiologic retrospective analysis of odontoid fractures in20 patients accompanied byThe IOT-HCFMUSP,from 2004 to 2010. METHODS: These fractures were stratified according to their classification (AO/Anderson andD'Alonzo, epidemiologic profile, type of treatment, time to consolidation of the fracture, and complications. RESULTS: It was observed that there was a higher number of odontoid fractures in males (4:1, between the third and fourth decades of life (60%, and that the main causes of the trauma were falling from

  13. FRATURA DO ARCO ZIGOMÁTICO NO PERÍODO DE CRESCIMENTO: ESTUDO EXPERIMENTAL EM RATOS

    GOULART Alan Cruvinel

    1998-01-01

    Full Text Available O comportamento da fratura do arco zigomático no período de crescimento foi avaliado através de mensurações cefalométricas. Fratura com desvio medial no lado direito foi realizada em ratos com um mês de idade. Foi verificada tendência de retorno do arco fraturado à sua posição original, porém, com diferença estatisticamente significante para a profundidade da fossa infratemporal. Entretanto, não houve diferença significante para a distância entre o arco zigomático e a mandíbula, o que pode ser explicado pela presença de desvio significante da mandíbula.

  14. Haste bloqueada "Faculdade de Medicina de Ribeirão Preto": experiência clínica no tratamento das fraturas femorais Ribeirão Preto school of medicine locking nail: clinical experience in the femoral fractures treatment

    Fernando Mendes Paschoal

    2000-12-01

    Full Text Available Uma série de 103 casos de fraturas diafisárias complexas do fêmur foram tratadas com a haste intramedular bloqueada FMRP, no período de maio de 1987 a dezembro 1995. Das 103 fraturas, 67 eram cominutivas, 12 bifocais (segmentar, 4 espirais, 13 proximais e 21 distais, instáveis, rotacionalmente, da diáfise femoral. Do total dos casos, constatou-se 97 bloqueios estáticos e 6 dinâmicos. Dessas 97 estáticas, 7 foram dinamizadas durante a evolução. Clínica e radiográficamente a consolidação ocorreu em 97,09% dos casos, com média de 16,72 semanas e em 3 casos não houve consolidação. Houve 4 casos de infecção suspeita e 3 estabelecidas que foram debeladas e evoluíram para consolidação. Houve 81 casos de encurtamentos que variaram entre 0,5 a 4 cm com média de 1 cm. O encurtamento menor ou igual a 2 cm ocorreu em 73 casos. Desvio de alinhamento em qualquer plano acima de 10 º e igual a 15º foi observado em 8 pacientes. Houve 10 casos de deformidades rotacionais, porém nenhum caso acima de 10º. A incidência de infecção foi baixa e a de consolidação alta. A estabilização dessas fraturas complexas permitiu imediata mobilização do paciente, reabilitação precoce do membro e diminuição da permanência hospitalar, excetuando os politraumatizados. A haste FMRP permitiu o tratamento dessas fraturas sem o uso de intensificador de imagens e de fresas flexíveis com baixo custo operacional. Os resultados foram semelhantes aos obtidos com as hastes intramedulares bloqueadas que necessitam de aparelhagem técnica mais sofisticada, porém com vantagens para o paciente e a equipe cirúrgica.A series of 103 cases of complex femoral fracture were treated with FMRP (Faculdade de Medicina de Ribeirão Preto nail. These fractures were treated from May 1987 until December 1995. From the 103 fractures, 67 were cominutive, 12 bifocal (segmental, 4 spiral, 13 proximal e 21 distal and unstable rotationaly. From the total of cases, 97

  15. Efeito do laser de baixa potência (AsGa, 904 ηm na reparação óssea de fraturas em ratos Effect of low-level laser (GaAs, 904 ηm for bone repair on fractures in rats

    Jorge Alfredo Léo

    2012-04-01

    Full Text Available OBJETIVO: Analisar os efeitos do laser de baixa potência, AsGa - 904 ηm, no reparo ósseo de fraturas de tíbias em ratos. MÉTODOS: 40 ratos divididos em quatro grupos de 10 animais: grupo controle, sem fratura (GC; grupo com fratura, sem tratamento (GE II; grupo com fratura tratado com laser a 10J/cm² (GE III e grupo com fratura tratado com laser a 15J/cm² (GE IV. A fratura foi realizada cirurgicamente e o tratamento teve duração de 45 dias, realizado em dias alternados. Finalizado o tratamento, os ratos foram submetidos à eutanásia e as tíbias tratadas foram radiografadas e submetidas a ensaios mecânicos de flexão em três pontos para avaliar a força máxima (N para ruptura. RESULTADOS: Os valores observados de força máxima (N foram: grupo controle (GC de 51,5N ± 7,9N; GE II de 17,2N ± 7,8N; GE III de 16,6N ± 12,1N e GE IV de 30,3N ± 7,8N. Foram observadas diferenças estatisticamente significantes entre o grupo controle e os grupos experimentais e também entre o grupo experimental IV e os grupos experimentais II e III. Em relação às radiografias, foi observada a formação de calo ósseo em todos os grupos fraturados, indicando que passaram pelo processo normal de reparo tecidual. CONCLUSÃO: O grupo GE IV, submetido à terapia laser com dosagem de 15J/cm² obteve o maior valor para força máxima (N entre os grupos experimentais, indicando a influência da maior dosagem do laser no reparo ósseo.OBJECTIVE: To analyze the effects of low-level laser therapy (GaAs, 904 nm for bone repair on tibial fractures in rats. METHODS: Forty rats were divided into four groups of 10 animals: control group without fracture (CG; fracture group without treatment (EG II; fracture group treated with laser at 10 J/cm² (EG III; and fracture group treated with laser at 15 J/cm² (EG IV. The fracture was produced surgically and the treatment lasted 45 days, done on alternate days. After treatment completion, the rats were sacrificed. The

  16. Osteochondroma involving mandibular condyle

    Latika Bachani

    2017-01-01

    Full Text Available Osteochondroma is defined as an osteocartilagenous exostosis with cartilage capped exophytic lesion that arises from the bone cortex. It is a slow growing benign tumor that is rarely seen in the maxillofacial region. Osteochondroma of the mandibular condyle is a relatively rare condition that causes a progressive enlargement of the condyle, usually resulting in facial asymmetry, temporomandibular joint (TMJ dysfunction and malocclusion. Radiographically, there is a unilaterally enlarged condyle usually with an exophytic growth of the tumor from the condylar head. The treatment of osteochondroma is primarily surgical resection of the tumor. This paper reports a case of osteochondroma of the right mandibular condyle presenting as a painless restricted mouth opening.

  17. Overview of Mandibular Condyle Fracture

    Park, Su-Seong; Lee, Keun-Cheol; Kim, Seok-Kwun

    2012-01-01

    The mandibular condyle is a region that plays a key role in the opening and closing of the mouth, and because fracture causes functional and aesthetic problems such as facial asymmetry, it is very important to perform accurate reduction. Traditionally, there has been disagreement on how to manage fracture of the mandibular condyle. This review explores the misunderstanding of mandibular condyle fracture treatment and modern-day treatment strategies.

  18. Overview of Mandibular Condyle Fracture

    Su-Seong Park

    2012-07-01

    Full Text Available The mandibular condyle is a region that plays a key role in the opening and closing of the mouth, and because fracture causes functional and aesthetic problems such as facial asymmetry, it is very important to perform accurate reduction. Traditionally, there has been disagreement on how to manage fracture of the mandibular condyle. This review explores the misunderstanding of mandibular condyle fracture treatment and modern-day treatment strategies.

  19. Overview of Mandibular Condyle Fracture

    Su-Seong Park

    2012-07-01

    Full Text Available The mandibular condyle is a region that plays a key role in the opening and closing ofthe mouth, and because fracture causes functional and aesthetic problems such as facialasymmetry, it is very important to perform accurate reduction. Traditionally, there has beendisagreement on how to manage fracture of the mandibular condyle. This review exploresthe misunderstanding of mandibular condyle fracture treatment and modern-day treatmentstrategies.

  20. Ultra-som pulsado de baixa intensidade em fraturas diafisárias: aplicação clínica em cães Low-intensity pulsed ultrasound in diaphyseal fractures: clinical application in dogs

    Valéria Lima de Sousa

    2008-08-01

    Full Text Available Os efeitos da estimulação ultra-sônica sobre a consolidação óssea têm sido demonstrados por trabalhos experimentais e clínicos. Este estudo teve por objetivo investigar a aplicação clínica do ultra-som pulsado de baixa intensidade como tratamento adjuvante de fraturas diafisárias em cães. Foram utilizados 16 cães de raças variadas, com faixa etária entre sete meses e seis anos, peso corpóreo entre 2,5 e 43kg, portadores de fraturas diafisárias fechadas recentes localizadas no rádio e ulna, fêmur ou tíbia e fíbula, estabilizadas por procedimentos de osteossíntese (fixação esquelética externa, pinos intramedulares ou a associação desses métodos. Os cães foram divididos em dois grupos: fraturas estabilizadas tratadas por ultra-som de baixa intensidade (grupo tratado, n=8; fraturas estabilizadas, não tratadas por estimulação ultra-sônica, (grupo controle, n=8. Os animais foram avaliados por exames clínicos e radiográficos nos períodos pré-operatório, pós-operatório imediato e a cada 30 dias posteriores aos procedimentos cirúrgicos. Realizou-se tratamento com ultra-som pulsado (sinal senoidal com freqüência de 1,5MHz, largura de pulso de 200µs e freqüência de repetição de 1kHz de baixa intensidade (30mW cm-2, aplicado de modo estacionário no foco de fratura. A terapia ultra-sônica foi realizada 20 minutos por dia, durante 21 dias consecutivos, a partir do período compreendido entre o 1° e o 9° dia pós-operatório. O teste t de Student, empregado na análise estatística, mostrou diferença significante (PThe effects of ultrasound stimulation on bone healing have been demonstrated in experimental and clinical studies. The purpose of this study was to investigate the clinical application of low-intensity pulsed ultrasound as an adjuvant for the treatment of diaphyseal fractures in dogs. Sixteen dogs of different breeds, ages ranging from seven months to six years, weighing from 2.5 to 43kg, were

  1. Diferenças sazonais de quedas e fraturas em idosos gaúchos

    Iride Cristofoli Caberlon

    2015-12-01

    Full Text Available Resumo Quedas e fraturas em pessoas idosas representam um problema relevante de saúde pública. Ambas vêm associadas a elevados índices de morbimortalidade, redução da capacidade funcional, institucionalização do idoso e óbito precoce. O objetivo deste estudo foi investigar quedas e fraturas em idosos, residentes em municípios da região metropolitana e serra gaúcha do Rio Grande do Sul, analisando fatores associados, sazonalidade e gravidade. Trata-se de estudo transversal, retrospectivo, descritivo-analítico, quantitativo, com dados secundários, em idosos atendidos por queda entre primeiro de janeiro a 31 de dezembro de 2010, em unidades de Atendimento de Urgência e Emergência do SUS. A amostra foi de 6.556 idosos atendidos por queda, dos quais 71% eram mulheres, 26,8% dos atendimentos ocorreram no inverno, 30% dos que caíram fraturaram, sendo 32% em mulheres contra 28% em homens (p < 0,0001. O local da queda foi registrado somente em 17,2% dos boletins, sendo 58% fora do domicílio. O inverno foi a estação do ano com 34% de fraturas confirmadas (p = 0,0002, sendo 26,3% com gravidade severa. Como a maioria das quedas e suas consequências podem ser prevenidas e evitadas, urge criar programas e ações multifatoriais de intervenção.

  2. Uma Metodologia para a avaliação dos gradientes de tenacidade à fratura ao longo da camada cementada do aço SAE 5115

    Sandor,Leonardo Taborda; Ferreira,Itamar

    2006-01-01

    Este trabalho propõe um modelo para avaliar pontualmente as variações de tenacidade à fratura ao longo da camada cementada de um aço SAE 5115. A pequena espessura dessas camadas impede a retirada de corpos de prova nas dimensões especificadas pelas normas de ensaios de tenacidade à fratura. Assim, para simular uma camada cementada retirou-se corpos-de-prova de tração e de tenacidade à fratura de amostras de aços SAE 5115, 5140, 5160 e 52100 assumindo a influência local apenas da variação do t...

  3. Mandibular pseudocarcinomatous hyperplasia.

    Warter, A; Walter, P; Meyer, C; Barrière, P; Galatir, L; Wilk, A

    2000-08-01

    Three unusual cases of pseudocarcinomatous (pseudoepitheliomatous) hyperplasia (PH) affecting chronic osteomyelitic mandibular sequestra are reported to highlight the differences with the various squamous neoplasms which occur in that site. In two patients carrying a mandibular graft following the excision of an ameloblastoma, mucosal ulcers resulted in chronic osteomyelitis. In a third patient, an apical dental infection was associated with fistulated osteomyelitis. Histology of the three sequestra showed an intraosseous squamous proliferation. It was characterized by a peripheral involvement of medullary spaces, the more mature epithelial layer covering the bone trabeculae without intervening stroma, and the basal type epithelial layer surrounding a central fibrovascular core. There were no histological or cytological signs of malignancy. PH shows an inverted pattern when compared with the centro-medullary tumoural islands seen in the various oral or odontogenic squamous neoplasms which occur in the jaws. The lack of signs of malignancy distinguish PH from common squamous cell carcinomas. A short clinical course is an important feature in the distinction of PH from the well differentiated squamous cell carcinomas which may develop in fistulated chronic osteomyelitis.

  4. Radiological classification of mandibular fractures

    Mihailova, H.

    2009-01-01

    Mandibular fractures present the biggest part (up to 97%) of the facial bone fractures. Method of choice for diagnosing of mandibular fractures is conventional radiography. The aim of the issue is to present an unified radiological classification of mandibular fractures for the clinical practice. This classification includes only those clinical symptoms of mandibular fracture which could be radiologically objectified: exact anatomical localization (F1-F6), teeth in fracture line (Ta,Tb), grade of dislocation (D I, D II), occlusal disturbances (O(+), O(-)). Radiological symptoms expressed by letter and number symbols are systematized in a formula - FTDO of mandibular fractures similar to TNM formula for tumours. FTDO formula expresses radiological diagnose of each mandibular fracture but it doesn't include neither the site (left or right) of the fracture, nor the kind and number of fractures. In order to express topography and number of fractures the radiological formula is transformed into a decimal fraction. The symbols (FTD) of right mandible fracture are written in the numerator and those of the left site - in the denominator. For double and multiple fractures between the symbols for each fracture we put '+'. Symbols for occlusal disturbances are put down opposite, the fractional line. So topographo-anatomical formula (FTD/FTD)xO is formed. In this way the whole radiological information for unilateral, bilateral, single or multiple fractures of the mandible is expressed. The information in the radiological topography anatomic formula, resp. from the unified topography-anatomic classification ensures a quick and exact X-ray diagnose of mandibular fracture. In this way contributes to get better, make easier and faster X-ray diagnostic process concerning mandibular fractures. And all these is a precondition for prevention of retardation of the diagnosis mandibular fracture. (author)

  5. Malignant mandibular tumors: two case reports of rare mandibular ...

    Arun Kumar Agnihotri

    2014-02-26

    Feb 26, 2014 ... present two cases of rare malignant mandibular tumors in a single institution. KEY WORDS: .... Spiculated osteoblastic periosteal reaction was noted with mild ... displacement of right 2nd premolar and 2nd molar teeth were ...

  6. Fratura extra-articular da extremidade medial da clavícula associada à luxação acromioclavicular tipo IV: relato de caso

    Correa, Mário Chaves; Gonçalves, Lucas Braga Jacques; Vilela, Jose Carlos Souza; Leonel, Igor Lima; Costa, Lincoln Paiva; Andrade, Ronaldo Percopi de

    2011-01-01

    Ocorrendo isoladamente, as fraturas da clavícula e as luxações acromioclaviculares são lesões muito comuns. A combinação de uma luxação acromioclavicular e de uma fratura do terço lateral da clavícula não é rara. Entretanto, existem muito poucos casos descritos de luxações acromioclaviculares associadas a fraturas do terço médio da clavícula; aquelas associadas a fraturas do terço medial são ainda mais raras. Nós reportamos o caso de um indivíduo adulto do sexo masculino que sofreu uma luxaçã...

  7. Demência como fator de risco para fraturas graves em idosos

    Carvalho Aline de Mesquita

    2002-01-01

    Full Text Available INTRODUÇÃO: As quedas entre pessoas idosas constituem importante problema de saúde pública devido à sua alta incidência, às complicações para a saúde e aos altos custos assistenciais. O estudo realizado visa a estimar a associação entre demência e ocorrência de quedas e fraturas entre idosos. MÉTODOS: Foi conduzido estudo caso-controle de 404 indivíduos com 60 ou mais anos de idade, da cidade do Rio de Janeiro, Brasil. Casos e controles foram pareados por idade, sexo e hospital. Os dados foram coletados por meio de entrevista estruturada com os idosos. Foram considerados portadores de quadro demencial idosos cuja pontuação no questionário BOAS fosse superior a dois. Foram obtidos odds ratios (OR ajustados por fatores potenciais de confusão, utilizando-se regressão logística condicional. RESULTADOS: As quedas distribuíram-se igualmente entre os períodos da manhã, tarde e noite, havendo uma redução em sua freqüência durante a madrugada. Acidentaram-se dentro de casa 78% dos idosos com demência, contra 55% daqueles sem essa doença. O OR não-ajustado para a associação entre demência e fratura grave foi de 2,0 (IC95%, 1,23-3,25. Após o ajuste por fatores de confusão, houve uma pequena redução dessa associação (OR=1,82, 1,03-3,23. CONCLUSÃO: Idosos com quadro demencial apresentam maior risco de caírem e ser hospitalizados por fratura do que idosos sem demência. Tal fato implica a necessidade de cuidados especiais com esses indivíduos, visando a minimizar o risco desses acidentes.

  8. Epidemiologia das fraturas zigomáticas: uma análise de 10 anos = Zygomatic fractures epidemiology: a 10-year-analysis

    Gondola, Abdiel Ortega

    2006-01-01

    Full Text Available Devido a sua localização e projeção no complexo maxilofacial, o osso zigomático apresenta elevado índice de fratura comparando-o às demais fraturas dos ossos da face. Estudos epidemiológicos sempre são de grande importância para o cirurgião BucoMaxiloFacial, pois fornecem dados pelos quais se pode traçar o perfil das fraturas faciais e analisar a efetividade dos métodos de tratamento empregados. No presente trabalho foi realizado um levantamento epidemiológico retrospectivo de 10 anos dos pacientes atendidos no Hospital Infantil Maria Lucinda que apresentavam fratura do complexo zigomático. A amostra foi composta por 153 pacientes portadores de fratura do complexo zigomático, onde foram analisados comparativamente os indicadores gênero, faixa etária, etiologia do trauma e localização topográfica da fratura. Os resultados obtidos mostraram o gênero masculino como o mais acometido (83,6%, a faixa etária de 21 a 40 anos (71,2% mais freqüente, tendo como causa principal a queda da própria altura (39,9% e o osso zigomático esquerdo como a localização mais afetada (49,7%

  9. Fraturas do anel pélvico: estudo epidemiológico Pelvic ring fractures: epidemiological study

    Alceu Gomes Chueire

    2004-03-01

    Full Text Available De fevereiro de 2000 a setembro de 2001, 84 pacientes apresentando fratura do anel pélvico foram avaliados, segundo determinado protocolo aplicado. Houve predomínio do sexo masculino (67%, a maioria dos pacientes eram brancos (86% e a idade média foi de 37 anos. Quanto ao tipo de acidente, os mais freqüentes foram os relacionados ao trânsito (58% - carro, moto e atropelamento - pacientes vítimas de traumas de alta energia. As fraturas foram classificadas de acordo com Tile(13 em estáveis, em 55% (fraturas do tipo A; rotacionalmente instáveis, em 30% (fraturas do tipo B e rotacional e verticalmente instáveis, em 15% (fraturas do tipo C. A fratura mais freqüentemente encontrada foi a dos ramos isquiopúbicos. O tratamento cirúrgico foi realizado em 29% dos pacientes. Houve necessidade de transfusão sangüínea em 20% dos pacientes, utilizando-se uma média de cinco unidades de sangue total; exceto dois pacientes (2,4% com lesão arterial intra pélvica que necessitaram mais de 10 unidades de sangue nas primeiras 48 horas. A mortalidade foi de sete por cento tendo relação significativa com traumas extra pélvicos.From February 2000 to September 2001, 84 patients with pelvic fractures were assessed, using a determined protocol. There were more men (67% than women. Most of the patients were white (86% and the average was 37 years of age. The most frequent accident was reported to have been traffic accidents (58% such as motor vehicle, motorcycle and running over - victims of high-energy injuries. The pelvic ring fractures were classified according to Tile (13 as stable in 55% (type A injury, as rotationally unstable in 30% (type B injury and as unstable in translation in 15% (type C injury. The most frequent lesion affecting the pelvic girdle was the isquiopubic bones fracture (transpubic instability. The overall rate of operative stabilization was 29%. An average of five units of total blood transfusion was required in 20% of the

  10. Mandibular tori are associated with mechanical stress and mandibular shape.

    Cortes, Arthur Rodriguez Gonzalez; Jin, Zhaoyu; Morrison, Matthew Daniel; Arita, Emiko Saito; Song, Jun; Tamimi, Faleh

    2014-11-01

    The influence of mechanical stimulation on the formation of torus mandibularis (TM) is still poorly understood. We sought to understand the etiology of TMs by investigating the role of parafunctional activity and mandibular morphology on the formation of TMs. We designed a case-control study for patients attending the dental clinic of the present study (University of São Paulo School of Dentistry, São Paulo, SP, Brazil). Patients presenting with TMs were defined as cases, and those without TMs were defined as controls. Finite element analysis (FEA) was used in 3-dimensional mandibular models to examine the stress distribution in the mandibles with and without TMs. In addition, the associations of mandibular arch shape, mandibular cortical index, and parafunctional activity with the presence of T were assessed using odds ratio analysis. A total of 10 patients with TMs and 37 without TMs were selected (22 men and 25 women, mean age 54.3 ± 8.4 years). FEA showed a stress concentration in the region in which TMs form during simulation of parafunctional activity. The radiographic assessment showed that those with TMs were more likely to have a square-shaped mandible with sharp angles (P = .001) and a normal mandibular cortex (P = .03). The subjects without TMs had a round-shaped mandible with obtuse angles and an eroded mandibular cortex. Parafunctional activity could be causing the formation of TMs by concentrating mechanical stress in the region in which TMs usually form. Thus, mandibular geometries that favor stress concentration, such as square-shaped mandibles, will be associated with a greater prevalence of TMs. Copyright © 2014 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.

  11. Pediatric mandibular fractures.

    Schweinfurth, J M; Koltai, P J

    1998-01-01

    Over the last 20 years, a revolution in the management of facial fractures has taken place. Refinements in biocompatible materials of great delicacy and strength along with advances in our understanding of biomechanics of the face, have rendered complex injuries consistently amenable to accurate 3-dimensional reconstruction. Furthermore, with the availability of education in the techniques of internal rigid fixation, these advanced techniques have become routine practice in adults. However, the suitability of rigid internal fixation for children remains controversial. There are many concerns about the effect of implanted hardware in the mandible of a growing child. In addition, some evidence suggests that the elevation of functional matrix off of bone may result in alterations in development. The goal is to restore the underlying bony architecture to its pre-injury position in a stable fashion, with a minimal of aesthetic and functional impairment. However, in children the treatment of bony injuries is most easily accomplished by techniques that may adversely effect craniofacial development. While it is not entirely possible to resolve this dilemma, there exists an extensive body of experimental and clinical information on the appropriate management of pediatric mandibular fractures which can be used to formulate a rational treatment plan for most cases. This paper presents an overview of the contemporary understanding and application of these treatment principles.

  12. Resultados do tratamento de fraturas crônicas pela via anterior em pacientes com osteoporose Resultados del tratamiento de fracturas crónicas por la via anterior en pacientes con osteoporosis Results of treatment of chronic fractures by anterior approach in patients with osteoporosis

    Fabio Leme de Oliveira Pinto

    2011-01-01

    Full Text Available OBJETIVO: Analisar os resultados da cirurgia de corpectomia e artrodese por via anterior nos pacientes com fratura tipo explosão da coluna toracolombar e com osteoporose, que foram submetidos a tratamento conservador prévio por no mínimo sete meses, sem melhora importante do quadro doloroso. MÉTODOS: Foram tratadas seis pacientes idosas com fratura-explosão da coluna toracolombar em um único nível, depois de, no mínimo, sete meses do trauma, pela via anterior, com corpectomia, uso de enxerto autólogo de costela e fixação com parafusos pediculares nos níveis adjacentes. A dor foi avaliada pela EVA no pré-operatório, três semanas, três meses, seis meses e um anos após a cirurgia. RESULTADO: As pacientes apresentaram melhora significativa da dor pós-operatória, com diminuição substancial do uso de medicação analgésica. CONCLUSÕES: Os autores recomendam a via anterior isolada como método de tratamento para fraturas tipo explosão crônicas em pacientes com osteoporose pela baixa taxa de complicações e pelos resultados satisfatórios encontrados.OBJECTIVO: Analizar los resultados de la cirugía de corpectomía y artrodesis por la vía anterior, en pacientes con fracturas tipo explosión de la columna toracolumbar y, con osteoporosis, que habían sido sometidos a tratamiento conservador previo por lo menos durante siete meses, sin mejora importante del cuadro de dolor. MÉTODOS: fueron tratadas seis pacientes ancianas del sexo femenino con la fractura-explosión de la columna toracolumbar en solamente un nivel, después de, como mínimo, siete meses del traumatismo, a través de la vía anterior, con corpectomía, utilización del injerto autólogo de costilla y fijaci��n con tornillos pediculares en los niveles adyacentes. El dolor fue evaluado con EVA en pre-operatorio, tres semanas, tres meses, seis meses y un año después de la cirugía. RESULTADO: Las pacientes presentaron mejoría significativa del dolor

  13. Avaliação de sensibilidade objetiva versus sensibilidade subjetiva após fraturas de zigoma

    Jean Francisco KIPPER

    Full Text Available Resumo Introdução Cirurgiões bucomaxilofaciais frequentemente tratam fraturas do complexo zigomaticofacial e, com isso, os sinais e sintomas auxiliam o profissional a estabelecer o diagnóstico e a conduta frente a cada caso. A presença de alteração de sensibilidade é um sintoma frequente neste tipo de trauma. Objetivo Avaliar comparativamente a presença e as alterações de sensibilidade subjetiva e sensibilidade objetiva após fraturas de zigoma. Metodologia Foram selecionados 14 pacientes com fraturas unilaterais de zigoma. A sensibilidade subjetiva foi avaliada por meio de um questionário e a sensibilidade objetiva, mensurada por meio do monofilamento de Semmes-Weinstein. Resultado Os resultados mostraram alteração de sensibilidade em 13 pacientes (92,84%; destes, oito pacientes (57,13% apresentaram alterações de ordem subjetiva e dez (71,42%, de ordem objetiva. Alterações concomitantes de sensibilidade subjetiva e sensibilidade objetiva foram encontradas em cinco pacientes (35,71%. Afetados exclusivamente por um tipo de alteração de sensibilidade somaram oito pacientes (57,13%; destes, cinco pacientes (35,71% apresentaram somente alterações objetivas e três pacientes (21,42%, apenas alterações subjetivas. A única queixa de sensibilidade subjetiva encontrada foi a hipoestesia, com sete casos (50%. Conclusão As alterações de sensibilidade são frequentemente encontradas após fraturas de zigoma, existindo uma forte correlação entre a perda da percepção subjetiva e a perda da sensibilidade objetiva; porém, ocorre predominância de alterações de ordem objetiva.

  14. Mandibular reconstruction in adults: a review.

    Goh, B.T.; Lee, S.; Tideman, H.; Stoelinga, P.J.W.

    2008-01-01

    Mandibular defects may result from trauma, inflammatory disease and benign or malignant tumours. Mastication, speech and facial aesthetics are often severely compromised without reconstruction. The goal of mandibular reconstruction is to restore facial form and function, implying repair of

  15. Estudo retrospectivo de radiografias com fraturas rádio e ulna em cães

    Robson Fortes Giglio

    2007-12-01

    Full Text Available Foram analisadas 528 radiografias simples de fraturas de rádio e ulna do arquivo do Serviço de Diagnostico por Imagem do Departamento de Cirurgia junto ao Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo realizadas no período de julho de 1999 a dezembro de 2005, selecionando-se os meses para análise de forma randomizada. Os principais resultados encontrados foram: Fraturas de rádio e ulna representam 20,9% do total encontradas, destas o tipo mais observado foi a transversal, tanto no rádio (75,5% quanto na ulna (76,6%. 87,1% das fraturas acometeram o rádio e a ulna. O terço distal foi o mais acometido foi o distal, tanto do rádio quanto da ulna (72,9% e 70,1%, respectivamente. Esquírolas ósseas foram observadas em 13,8% e desvio de eixo ósseo em 94,9% dos casos. 40,2% dos cães não possuíam raça definida. 34,3% dos cães possuíam idade entre seis meses a um ano.

  16. Fratura periprotética da tíbia combinada com fratura de fadiga da haste tibial de artroplastia total do joelho Tibial periprosthetic fracture combined with tibial stem stress fracture from total knee arthroplasty

    Fernando Fonseca

    2011-01-01

    Full Text Available As complicações das artroplastias totais do joelho relacionadas com o próprio material são muito raras, exceto o desgaste do polietileno. Neste artigo os autores reportam o caso de uma paciente do sexo feminino de 58 anos referenciada ao pronto-socorro do nosso hospital por uma fratura periprotética tibial (tipo I da classificação da Mayo Clinic. Uma observação mais cuidadosa mostrou a presença concomitante da referida fratura da tíbia associada à fratura de fadiga da haste tibial. A prótese com a haste foi remetida a um laboratório de biomecânica independente onde foi avaliada e efetuada uma reconstrução com uso de sistema de elementos finitos em CAD de modo a verificar a existência de algum defeito de fabricação e as eventuais causas para o sucedido. Depois de avaliadas diversas hipóteses, concluiu-se que a fratura do material foi provocada por uma sobrecarga na zona de transição prato/haste secundária à falência óssea prévia (fratura. Da avaliação do caso ressalta-se novamente a necessidade de efetuar uma avaliação adequada da mineralização óssea e, em caso de dúvida, utilizar uma haste longa.Total knee arthroplasty complications related to the prosthetic material are very rare, except for polyethylene wear. We report the case of a 58-year-old woman who came to the emergency service of our hospital with a periprosthetic tibial fracture (Mayo Clinic type I. Careful examination showed that this fracture was concomitantly associated with a tibial stem fatigue fracture. The prosthesis and the stem were sent to an independent biomechanics laboratory for evaluation. A finite-element CAD system was used to make a reconstruction, so as to ascertain whether there had been any manufacturing defect and what the causes of the event might have been. After evaluation of several hypotheses, it was concluded that the fracture in the prosthetic material had been caused by overloading at the plate/stem transition zone

  17. Treatment of Mandibular Prognathism

    Hong-Po Chang

    2006-01-01

    Full Text Available Mandibular prognathism (MP or skeletal Class III malocclusion with a prognathic mandible is one of the most severe maxillofacial deformities. Facial growth modification can be an effective method of resolving skeletal Class III jaw discrepancies in growing children with dentofacial orthopedic appliances including the chincup, face mask, maxillary protraction combined with chincup traction and the Fränkel functional regulator III appliance. Orthognathic surgery in conjunction with orthodontic treatment is required for the correction of adult MP. The two most commonly applied surgical procedures to correct MP are sagittal split ramus osteotomy (SSRO and intraoral vertical ramus osteotomy. Both procedures are suitable for patients in whom a desirable occlusal relationship can be obtained with a setback of the mandible, and each has its own advantages and disadvantages. In bilateral SSRO, the intentional ostectomy of the posterior part of the distal segment can offer long-term positioned stability. This may be attributable to reduction of tension in the pterygomasseteric sling that applies force in the posterior mandible. While various environmental factors have been found to contribute to the development of MP, heredity plays a substantial role. The relative contributions of genetic and environmental components in the etiology of MP are unclear. The recent identification of the genetic susceptibilities to MP constitutes the first step toward understanding the molecular pathogenesis of MP. Further studies in molecular biology are needed to identify the gene-environment interactions associated with the phenotypic diversity of MP and the heterogenic developmental mechanisms thought to be responsible for them.

  18. Osteochondroma of the mandibular condyle

    Ashish Kumar

    2011-01-01

    Full Text Available Osteochondroma (OC of the mandibular condyle is a relatively rare condition that causes a progressive enlargement of the condyle, usually resulting in facial asymmetry, temporomandibular joint (TMJ dysfunction, and malocclusion. Radiographically, there is a unilaterally enlarged condyle usually with an exophytic outgrowth of the tumor from the condylar head. We present a case of a left mandibular condylar OC that created a major facial asymmetry, malocclusion, and TMJ dysfunction. Discussion includes the rationale for treatment and the method used in this case. In actively growing OCs, surgical intervention is indicated to remove the tumor stopping the benign growth process and improve facial symmetry, occlusion, and jaw function.

  19. Tratamento cirúrgico das fraturas do odontóide tipo II com parafuso anterior: análise de 15 casos

    Dantas Fernando Luiz Rolemberg

    2002-01-01

    Full Text Available Apresentamos estudo retrospectivo dos resultados de 15 pacientes consecutivos, com fratura do odontóide tipo II P (fratura com traço oblíquo e deslocamento posterior e II N (fratura com traço horizontal na base do odontóide, segundo a classificação de Roy-Camille , que foram submetidos a fixação anterior direta do odontóide com parafuso. A série é composta por 13 homens e 2 mulheres, com idade variando entre 14 a 74 anos e período de acompanhamento de 6 a 36 meses (média 20 meses. Tivemos apenas uma complicação relacionada com a técnica cirúrgica: um parafuso mal posicionado necessitando de uma reoperação para ser reposicionado. Não houve óbito. Não houve saída nem quebra de parafuso. Obteve-se 94% de fusão óssea. Propomos que seja utilizada a classificação de Roy-Camille na seleção dos casos cirúrgicos de fraturas do odontóide, pois ela fornece uma abordagem cirúrgica específica para cada tipo de fratura.

  20. Radiological study of the mandibular fractures

    Kim, Ju Won; Kim, Kyoung A; Koh, Kwang Jun [Department of Oral and Maxillofacial Radiology, School of Dentistry, and Institute of Oral Bio Science, Chonbuk National University, Jeonju (Korea, Republic of)

    2009-06-15

    To classify and evaluate mandibular fractures. The author classified mandibular fractures of 284 patients who were referred to the Chonbuk National University Dental Hospital during the period from March 2004 to June 2007. This study was based on the conventional radiographs as well as computed tomographs which were pertained to the 284 patients who have had the mandibular fractures including the facial bone fractures. And mandibular fractures were classified with respect to gender, age, site and type of the fractures. More frequently affected gender with mandibular fracture was male with the ratio of 3.3 : 1. The most frequently affected age with mandibular fracture was third decade (38%), followed by fourth decade (16%), second decade (15%), fifth decade (11%), sixth decade (7%), seventh decade (5%), eighth decade (4%), first decade (4%), and ninth decade (0.3%). The most frequent type of mandibular fracture was single fracture (58%), followed by double fracture (39%), triple fracture (3%). The most common site of mandibular fracture was mandibular condyle as 113 cases (27.7%) and the next was mandibular symphysis as 109 cases (26.7%), mandibular angle as 103 cases (25.3%), mandibular body as 83 cases (20.3%) in order. The sum of fracture sites were 408 sites and there were 1.4 fracture sites per one patient. The number of mandible fractures accompanied with facial bone fractures were 41 cases (14.4%). The results showed the most frequent type and common site of mandibular fracture was single fracture and mandibular condyle respectively.

  1. Radiological study of the mandibular fractures

    Kim, Ju Won; Kim, Kyoung A; Koh, Kwang Jun

    2009-01-01

    To classify and evaluate mandibular fractures. The author classified mandibular fractures of 284 patients who were referred to the Chonbuk National University Dental Hospital during the period from March 2004 to June 2007. This study was based on the conventional radiographs as well as computed tomographs which were pertained to the 284 patients who have had the mandibular fractures including the facial bone fractures. And mandibular fractures were classified with respect to gender, age, site and type of the fractures. More frequently affected gender with mandibular fracture was male with the ratio of 3.3 : 1. The most frequently affected age with mandibular fracture was third decade (38%), followed by fourth decade (16%), second decade (15%), fifth decade (11%), sixth decade (7%), seventh decade (5%), eighth decade (4%), first decade (4%), and ninth decade (0.3%). The most frequent type of mandibular fracture was single fracture (58%), followed by double fracture (39%), triple fracture (3%). The most common site of mandibular fracture was mandibular condyle as 113 cases (27.7%) and the next was mandibular symphysis as 109 cases (26.7%), mandibular angle as 103 cases (25.3%), mandibular body as 83 cases (20.3%) in order. The sum of fracture sites were 408 sites and there were 1.4 fracture sites per one patient. The number of mandible fractures accompanied with facial bone fractures were 41 cases (14.4%). The results showed the most frequent type and common site of mandibular fracture was single fracture and mandibular condyle respectively.

  2. Análise isocinética e cinética de corredores e triatletas com e sem histórico de fratura por estresse

    Natália Mariana Silva Luna

    2015-08-01

    Full Text Available INTRODUÇÃO: A associação da fadiga muscular com o aumento da força vertical de reação do solo representa risco de fratura por estresse de tíbia em esportes como a corrida de longa distância e o triatlo. Objetivo: Analisar e comparar parâmetros do componente vertical das forças de reação do solo e parâmetros musculares isocinéticos da flexão plantar (FP e dorsiflexão (DF do tornozelo entre grupos de corredores de longa distância e triatletas com e sem histórico de fratura por estresse de tíbia.MÉTODOS: Setenta e cinco atletas de corrida de longa distância e triatletas do sexo masculino, com média de idade de 30,26 ± 6,51 anos foram divididos de acordo com a história pregressa de fratura por estresse de tíbia em: grupo fratura (GF, composto por 12 indivíduos com história de fratura por estresse da tíbia, e grupo não-fratura (GNF, composto por 37 indivíduos sem história de fratura por estresse de tíbia. Os parâmetros cinéticos foram medidos durante a corrida por meio de uma plataforma de força AMTI, e os parâmetros isocinéticos por meio de dinamômetro isocinético Biodex (System 3.RESULTADOS: Para todas as variáveis isocinéticas e cinéticas, não houve diferenças entre GF e GNF.CONCLUSÃO: Ainda que não se tenha identificado uma diferença de desempenho entre os grupos estudados, o perfil cinético (impacto e isocinético (atividade muscular mostra que o treinamento da corrida com déficits em cuidados com a condição muscular e o controle de fatores extrínsecos pode criar uma situação de risco de ocorrência de fraturas por estresse.

  3. CARACTERÍSTICAS CLÍNICAS E PADRÃO DE FRATURAS NO MOMENTO DO DIAGNÓSTICO DE OSTEOGÊNESE IMPERFEITA EM CRIANÇAS

    Evelise Brizola

    Full Text Available RESUMO Objetivo: Caracterizar o padrão de fraturas e a história clínica no momento do diagnóstico de osteogênese imperfeita. Métodos: Neste estudo retrospectivo, foram incluídos todos os pacientes com osteogênese imperfeita de ambos os sexos, com idades entre 0 e 18 anos, que realizaram tratamento entre 2002 e 2014. Os prontuários médicos foram revisados para coleta de dados clínicos, incluindo presença de escleras azuladas, dentinogênese imperfeita, história familiar positiva para a doença e locais das fraturas, além de achados radiográficos no momento do diagnóstico. Resultados: Foram incluídos no estudo 76 pacientes (42 do sexo feminino, com idade, no momento do diagnóstico, entre 0 e 114 meses [mediana (p25-p75 de idade de 38 (6-96 meses]. Escleras azuladas estavam presentes em 93,4% dos pacientes, dentinogênese imperfeita foi observada em 27,6% e ossos wormianos em 29,4%. O número de fraturas ao diagnóstico variou entre 0 e 17, com uma mediana de 3 (2-8 fraturas. Em 40 (57% pacientes, as fraturas eram de membros superiores e inferiores no momento do diagnóstico e, em 9 pacientes também havia fratura vertebral. O diagnóstico foi realizado ao nascimento em 85,7% dos pacientes com o tipo 3 e em 39,3% daqueles com tipo 4/5 da doença. Conclusões: Osteogênese imperfeita é uma doença genética com características clínicas distintas, tais como fragilidade óssea, fraturas recorrentes, escleras azuladas e dentinogênese imperfeita. É importante saber identificar essas características, facilitando o diagnóstico, otimizando o tratamento e diferenciando de outras doenças que também podem causar fraturas.

  4. IMOBILIZAÇÃO DE FRATURAS DISTAIS DO ÚMERO EM CÃES ATRAVÉS DE TRANSFIXAÇÃO ÓSSEA

    Isabela Schmitt

    1993-04-01

    Full Text Available Fraturas distais do úmero, em cinco cães, foram imobilizadas através de transfixação esquelética com pinos de Steinmann estabilizados com barras de acrílico autopolimerizável, O artifício foi adaptado no sentido craneo-caudal com imobilização do cotovelo. Três dos cães apresentaram fratura unilateral, outro bilateral e o quinto unilateral com osteomielite. A metodologia adotada permitiu rápida recuperação dos pacientes sendo indicado como opção eficiente e de baixo custo.

  5. Fixação pedicular percutânea de fraturas vertebrais toracolombares sem compromisso neurológico

    Luís Miguel Pinheiro da Silva

    2013-01-01

    Full Text Available OBJETIVO: Avaliar a eficácia e a segurança da fixação pedicular percutânea em fraturas toraco-lombares, sem compromisso neurológico. MÉTODOS: Foram incluídos no estudo os pacientes com idade compreendida entre os 18 e 70 anos com fratura toracolombar AO tipo (A.3, cifose> 30º ou redução da altura do corpo vertebral> 50% ou compressão do canal vertebral >50% que foram submetidos a tratamento cirúrgico com fixação pedicular percutânea. Foram avaliados os parâmetros radiológicos: ângulo de Cobb, colapso vertebral, acunhamento anterior e compressão do canal vertebral no pré-operatório, pós-operatório e no fim do seguimento. O resultado funcional e clínico foi avaliado pelo Oswestry Disability Index (ODI. RESULTADOS: O tempo operatório médio foi de 81 minutos (Mín. 69, Máx. 95 min. O volume médio de perda sanguínea intraoperatória foi de 85 ml (Mín. 75 e Máx. 155 ml. O seguimento médio foi de sete meses (Min. três meses, Máx. 14 meses. Apresentaram um ODI médio final de 18% (excelente. CONCLUSÕES: Os resultados clínicos sugerem que a fixação pedicular percutânea pode ser uma técnica cirúrgica alternativa para o tratamento das fraturas toracolombares AO tipo (A.3, sem défices neurológicos. Esta técnica demonstrou ser eficaz e segura, apresentando as vantagens de uma abordagem minimamente invasiva.

  6. Pearls of mandibular trauma management.

    Koshy, John C; Feldman, Evan M; Chike-Obi, Chuma J; Bullocks, Jamal M

    2010-11-01

    Mandibular trauma is a common problem seen by plastic surgeons. When fractures occur, they have the ability to affect the patient's occlusion significantly, cause infection, and lead to considerable pain. Interventions to prevent these sequelae require either closed or open forms of reduction and fixation. Physicians determining how to manage these injuries should take into consideration the nature of the injury, background information regarding the patient's health, and the patient's comorbidities. Whereas general principles guide the management of the majority of injuries, special consideration must be paid to the edentulous patient, complex and comminuted fractures, and pediatric patients. These topics are discussed in this article, with a special emphasis on pearls of mandibular trauma management.

  7. Pearls of Mandibular Trauma Management

    Koshy, John C.; Feldman, Evan M.; Chike-Obi, Chuma J.; Bullocks, Jamal M.

    2010-01-01

    Mandibular trauma is a common problem seen by plastic surgeons. When fractures occur, they have the ability to affect the patient's occlusion significantly, cause infection, and lead to considerable pain. Interventions to prevent these sequelae require either closed or open forms of reduction and fixation. Physicians determining how to manage these injuries should take into consideration the nature of the injury, background information regarding the patient's health, and the patient's comorbi...

  8. Mandibular ramus fractures: a rarity.

    Kale, Tejraj Pundalik; Kotrashetti, S M; Louis, Archana; Lingaraj, J B; Sarvesh, B U

    2013-01-01

    To determine the incidence of mandibular ramus fractures in KLE's PK Hospital and to analyze the outcome of open reduction and internal fixation of these fractures. Using a retrospective study design, records of all trauma patients who reported to the Department of Oral and Maxillofacial Surgery, KLE's PK Hospital Belgaum, between the years January 2006 to October 2011 was obtained from the medical records office. The data variables that were analyzed were the name, age, sex, cause of injury, pretreatment occlusion, treatment given, period of MMF and post-treatment occlusion. Total number of mandibular fracture cases was 298. Ramus fractures were 10 in number which accounted for 3.3% of fractures. The age range of these 10 patients was seen to be between 20 to 80 years with the average age being 35.6 years. Of these 10 patients, 9 were male and 1 was female and 7 patients were treated by open reduction and internal fixation and the remaining 3 by closed reduction. The average period of MMF was 3 days for the patients who underwent open reduction and internal fixation. There was improvement in occlusion in all 10 patients post-treatment and there was no complication reported in any of the cases. Ramus fractures accounted for 3.3% of all mandibular fractures. Open reduction and internal fixation of ramus fractures ensures adequate functional and anatomic reduction. This study makes an attempt to throw a light on the increasing incidence of ramus fractures and a successful management of these fractures by open reduction and internal fixation. How to cite this article: Kale TP, Kotrashetti SM, Louis A, Lingaraj JB, Sarvesh BU. Mandibular Ramus Fractures: A Rarity. J Contemp Dent Pract 2013;14(1):39-42. Source of support: Nil Conflict of interest: None declared.

  9. Rediseño de una lavadora de bidones para envasado de agua tratada

    Martinez Lozano, Ernesto Rolando

    2009-01-01

    El objetivo de esta tesis es aplicar los conocimientos adquiridos, para realizar el rediseño de una lavadora manual para bidones de una empresa de tratamiento de agua, se establecerán las condiciones de diseño optimo para disminuir el tiempo en el proceso de lavado de los bidones que son utilizados en el proceso de envasado del agua tratada el cual es realizado manualmente, en donde los tiempos de lavado varían entre 40 y 60 botellas por hora; queriendo llegar a obtener un tiempo estándar de ...

  10. Roentgenographic study of the mandibular canal

    Ahn, Hyung Kyu

    1980-01-01

    The mandibular canal must be considered carefully during the surgical treatment, especially surgical extraction of the impacted tooth and intraosseous implant, because it contains the important inferior alveolar nerve and vessels. The author investigated the curvature of the mandibular canal and its relation to the mandibular molars and positional relation between the mental foramen and the mandibular premolars in orthopantomogram. The materials consisted of 441 orthopantomograms divided four groups; Group I consisted of 56 males and 44 females from 1 to 6 years of age, Group II consisted of 58 males and 45 females from 7 to 12 years of age, Group III consisted of 65 males and 33 females from 13 to 18 years of age, Group IV consisted of 86 males and 54 females over 19 years of age. The results were as followings; 1. The curvature of mandibular canal was 144.50 .deg. in Group II, 148.11 .deg. in Group III, 147.33 .deg. in Group IV. 2. The curvature of mandibular canal was located most frequently on the area between mandibular 1st molar and mandibular 2nd molar in Group I (42%) and on the mandibular 2nd molar area in Group II (54%), Group III (59%), Group IV (53%). 3. The position of mental foramen was most frequently below the mandibular 1st premolar in Group I (58%), between the mandibular 1st premolar and the 2nd premolar in Group II (62%), Group III (47%), and below the mandibular 2nd premolar in Group IV (58%).

  11. Complaints related to mandibular function impairment after closed treatment of fractures of the mandibular condyle

    Niezen, E. T.; Bos, R. R. M.; de Bont, L. G. M.; Stegenga, B.; Dijkstra, P. U.

    This study analysed the relationship between complaints and mandibular function after closed treatment of fractures of the mandibular condyle in a prospective study. In a I-year follow-up, complaints were assessed during physical examination and function was assessed using the mandibular function

  12. Radiologic study of mandibular foramen of mandibular prognathism by three-dimensional computed tomography

    Lee, Seung Hun; Moon, Cheol Hyun; Im, Jeong Soo; Seo, Hwa Jeong [Graduate School of Public Health and Social Welfare, Gachon University of Medicine and Science, Incheon (Korea, Republic of)

    2010-06-15

    This study is aimed to evaluate the position of mandibular foramen of mandibular prognathism patients using 3-dimensional CT images in order to reduce the chance of an anesthetic failure of the mandibular nerve and to prevent the damage to the inferior alveolar nerve during the orthognathic surgery. The control group consist of 30 patients with class I occlusion. The experimental group consist of 44 patients with class III malocclusion. Three-dimensional computed tomography was used to evaluate the position of the mandibular foramina. The distance between mandibular plane and mandibular foramen, class I was 25.385 mm, class III was 23.628 mm. About the distance between occlusal plane and mandibular foramen, class I was 1.478 mm, class III was 5.144 mm. The distance between posterior border plan of mandibular ramus and mandibular foramen had not statistically significant. About the distance between sagittal plane of mandible and mandibular foramen did not also showed statistically significant. The result of this study could help the clinicians to apprehend more accurate anatomical locations of the foramina on the mandible with various facial skeletal types. Thereby to perform more accurate block anesthesia of the mandibular nerve and osteotomy with minimal nerve damage. In addition, this study could provide fundamental data for any related researches about the location of the mandibular foramina for other purposes.

  13. Radiologic study of mandibular foramen of mandibular prognathism by three-dimensional computed tomography

    Lee, Seung Hun; Moon, Cheol Hyun; Im, Jeong Soo; Seo, Hwa Jeong

    2010-01-01

    This study is aimed to evaluate the position of mandibular foramen of mandibular prognathism patients using 3-dimensional CT images in order to reduce the chance of an anesthetic failure of the mandibular nerve and to prevent the damage to the inferior alveolar nerve during the orthognathic surgery. The control group consist of 30 patients with class I occlusion. The experimental group consist of 44 patients with class III malocclusion. Three-dimensional computed tomography was used to evaluate the position of the mandibular foramina. The distance between mandibular plane and mandibular foramen, class I was 25.385 mm, class III was 23.628 mm. About the distance between occlusal plane and mandibular foramen, class I was 1.478 mm, class III was 5.144 mm. The distance between posterior border plan of mandibular ramus and mandibular foramen had not statistically significant. About the distance between sagittal plane of mandible and mandibular foramen did not also showed statistically significant. The result of this study could help the clinicians to apprehend more accurate anatomical locations of the foramina on the mandible with various facial skeletal types. Thereby to perform more accurate block anesthesia of the mandibular nerve and osteotomy with minimal nerve damage. In addition, this study could provide fundamental data for any related researches about the location of the mandibular foramina for other purposes.

  14. Pharyngeal airway changes following mandibular setback surgery

    Babu Ramesh

    2005-01-01

    Full Text Available Treatment of dentofacial deformities with jaw osteotomies has an effect on airway anatomy and therefore mandibular setback surgery has the potential to diminish airway size. The purpose of this study was to evaluate the effect of mandibular setback surgery on airway size. 8 consecutive patients were examined prospectively. All patients underwent mandibular setback surgery. Cephalometric analysis was performed preoperatively and 3 months post operatively with particular attention to pharyngeal airway changes. Pharyngeal airway size decreased considerably in all, patients thus predisposing to development of obstructive sleep apnea. Therefore, large anteroposterior discrepancies should be corrected by combined maxillary and mandibular osteotomies.

  15. Exposição humana a trialometanos presentes em água tratada

    Maria Y Tominaga

    1999-08-01

    Full Text Available Realizou-se uma revisão bibliográfica do período de 1974-1998, no MEDLINE, sobre compostos orgânicos halogenados derivados de hidrocarbonetos denominados de trialometanos. Muitos deles, reconhecidamente carcinogênicos para diferentes espécies animais, podem ser encontrados freqüentemente, inclusive entre nós, em águas tratadas e enviadas à população urbana. É o caso de compostos como o clorofórmio, bromodiclorometano, clorodibromometano e bromofórmio, resultantes da halogenação de precursores, principalmente substâncias húmicas e fúlvicas presentes na água que será tratada (clorada. Assim, descreve-se sua formação, fontes de exposição humana bem como os aspectos toxicológicos de maior importância: disposição cinética e espectro dos efeitos tóxicos (carcinogênicos, mutagênicos e teratogênicos decorrentes de exposições a longo prazo e baixas concentrações. Níveis seguros de exposição propostos são também fornecidos.

  16. Exposição humana a trialometanos presentes em água tratada

    Tominaga Maria Y

    1999-01-01

    Full Text Available Realizou-se uma revisão bibliográfica do período de 1974-1998, no MEDLINE, sobre compostos orgânicos halogenados derivados de hidrocarbonetos denominados de trialometanos. Muitos deles, reconhecidamente carcinogênicos para diferentes espécies animais, podem ser encontrados freqüentemente, inclusive entre nós, em águas tratadas e enviadas à população urbana. É o caso de compostos como o clorofórmio, bromodiclorometano, clorodibromometano e bromofórmio, resultantes da halogenação de precursores, principalmente substâncias húmicas e fúlvicas presentes na água que será tratada (clorada. Assim, descreve-se sua formação, fontes de exposição humana bem como os aspectos toxicológicos de maior importância: disposição cinética e espectro dos efeitos tóxicos (carcinogênicos, mutagênicos e teratogênicos decorrentes de exposições a longo prazo e baixas concentrações. Níveis seguros de exposição propostos são também fornecidos.

  17. EFICIENCIA DEL TRATAMIENTO QUÍMICO EN LA PREVENCIÓN DEL TAPONAMIENTO DE GOTEROS APLICANDO AGUA RESIDUAL SANITARIA TRATADA

    RAFAEL OLIVEIRA BATISTA

    2009-01-01

    Full Text Available El objetivo de este trabajo fue el de verificar la eficiencia del tratamiento químico en la prevención del taponamiento de los sistemas de goteo, cuando se usa aguas residuales sanitarias tratadas. Para la realización del ensayo experimental fue construida una plataforma de ensayos con la finalidad de abastecer cuatro unidades de irrigación por goteo con aguas residuales sanitarias, tratada y filtradas mediante un filtro de disco de 120 mesh. Fueron ensayados tres modelos de goteros (M1, M2 y M3 durante un período de 560 horas. En el tratamiento químico fueron ensayadas las concentraciones de cloro residual libre de 0; 0,4; 1,0 y 1,9 mg L-1. A partir de los resultados obtenidos se tienen las siguientes conclusiones: el agua residual sanitaria, tratada por aplicación vía sistema de irrigación por goteo propicio la formación de un biofilme en los goteros, resultante de la interacción entre colonias de bacterias y algas. La aplicación de cloro en el agua residual sanitaria tratada, minimizó el desarrollo del biofilme en el interior de los goteros y de las líneas laterales de irrigación; además, se encontró que los goteros con mayor diámetro en el laberinto y con mas de un filtro secundario (M2 y M3, son mas susceptibles al taponamiento cuando trabajan con aguas residuales tratadas. La concentración de cloro residual libre de 0,4 mg L-1 fue mas sustentable en la prevención de taponamiento por biofilme en sistemas de riego por goteo que operan con agua residual domestica tratada.

  18. Perfil funcional, sociodemográfico e epidemiológico de idosos hospitalizados por fratura proximal de fêmur

    Danielle Ferreira Santana

    2015-05-01

    Full Text Available A fratura proximal de fêmur (FPF está relacionada a altos índices de morbidade e a grande impacto sobre a capacidade funcional do idoso. O objetivo do estudo foi traçar o perfil funcional de pacientes idosos hospitalizados por FPF, analisando os tipos de fraturas, o mecanismo causal, e as características físicas e funcionais prévias ao evento. Trata-se de um estudo do tipo observacional, quantitativo, de corte transversal, cujos participantes eram pacientes hospitalizados por FPF. Foi utilizada uma Ficha de Registro para coletar os dados sociodemográficos. O grau de independência funcional e a capacidade de marcha prévia à FPF foram avaliados respectivamente pelo Índice de Barthel, o Questionário de Pfeffer e a Classificação Funcional da Marcha Modificada. A amostra foi constituída por 32 idosos com média de idade de 79 (± 9,5 anos e uma predominância do sexo feminino (71,8%, de cor parda (43,8% e baixa escolaridade. A maioria não morava sozinho e faziam uso de algum medicamento. Os idosos participantes, previamente à fratura, eram independentes para as atividades básicas da vida diária (ABVD, dependentes para as atividades instrumentais da vida diária (AIVD e não utilizam dispositivos para locomoção. A queda foi a principal causa da FPF, sendo as mais prevalentes a fratura de colo de fêmur (FCF e a fratura transtrocantérica (FTT. As comorbidades, os medicamentos, os fatores sociodemográficos, o deficit de marcha e a dependência funcional, podem estar associados à ocorrência de FPF em idosos.  

  19. Mandibular advancement appliance for obstructive sleep apnoea

    Petri, Niels; Svanholt, Palle; Solow, Beni

    2008-01-01

    The aim of this trial was to evaluate the efficacy of a mandibular advancement appliance (MAA) for obstructive sleep apnoea (OSA). Ninety-three patients with OSA and a mean apnoea-hypopnoea index (AHI) of 34.7 were centrally randomised into three, parallel groups: (a) MAA; (b) mandibular non...

  20. Ultrasound and multidetector computed tomography of mandibular ...

    Because of local invasivity and high metastatic potential, preoperative imaging evaluation of mandibular region and tumoral staging is essential along with biopsy sampling. The present manuscript describes the ultrasound and computed tomographic imaging findings of mandibular gland adenocarcinoma in two dogs and ...

  1. Influence of mandibular length on mouth opening

    Dijkstra, PU; Hof, AL; Stegenga, B; De Bont, LGM

    Theoretically, mouth opening not only reflects the mobility of the temporomandibular joints (TMJs) but also the mandibular length. Clinically, the exact relationship between mouth opening, mandibular length, and mobility of TMJs is unclear. To study this relationship 91 healthy subjects, 59 women

  2. Cerebro-costo-mandibular syndrome

    Flodmark, P.; Wattsgaard, C.

    2001-01-01

    Cerebro-costo-mandibular syndrome is a rare disorder characterized by rib malformations, various degrees of cerebral maldevelopment, mental deficiency, palatal defects, and micrognatia. This syndrome was first described in 1966. The majority of cases are sporadic, but a few instances of familial occurrence have been reported, some with an autosomal recessive pattern of inheritance. Mortality in early age has been high, probably mostly due to respiratory insufficiency secondary to rib abnormalities and flail chest. We report a mother and son with this disorder, suggesting autosomal dominant transmission. (orig.)

  3. Biomechanical considerations in mandibular incisor extraction cases.

    Rachala, Madhukar Reddy; Aileni, Kaladhar Reddy; Dasari, Arun Kumar; Sinojiya, Jay

    2015-01-01

    Mandibular incisor extraction can be regarded as a valuable treatment option in certain malocclusions to obtain excellence in orthodontic results in terms of function, aesthetics and stability. This treatment alternative is indicated in clinical situations like mild to moderate class III malocclusion, mild anterior mandibular tooth size excess, periodontally compromised teeth, ectopic eruption of mandibular incisor and minimal openbite tendencies. Unlike in premolar extraction cases, space closure in mandibular incisor extraction cases is unique in which the extraction space will be in the middle of the arch. The end result of space closure in these cases should be well aligned, upright, anterior teeth with parallel roots and the goal can be achieved with the bodily tooth movement through proper application of biomechanics. The purpose of this article is to explain the biomechanics of space closure in mandibular incisor extraction cases.

  4. [The temporo-mandibular articulation].

    Dargaud, J; Vinkka-Puhakka, H

    2004-04-01

    The standing posture of humans has created both morphological and functional adaptations in the temporo-mandibular joint and the masticatory function. This biped state is the one of the most important characteristic of human evolution. It is furthermore the agent determining most of the functional changes in the whole body. This survey will be carried out in several levels including, a descriptive anatomy, biomechanics, radiological imaging, functioning in the articulation of TMJ. The descriptive anatomic picture will be obtained by the traditional dissection techniques. 20 TMJ joints are dissected from 10 cadavers: 7 cadavers, 65-75 year old, 3 cadavers, 60-65 year old. The x-rays are lateral view and the subjects of the radiological imaging are young's, adults and olds: 1, 3 y-old Male; 1, 7 y-old Female; 1, 14 y-old Female; 10, 19-23 y-old Male; 1, 26 y-old Female; 1, 34 y-old Male; 1, 75 y-old Female. The anatomic elements in the TMJ well resembled the ones described in the literature of the capsule, the ligament, the masticator muscles (masseter, temporal, medial and lateral pterygoids). The temporo-mandibular ligament proved to be difficult to separate from the capsule in some of the specimens. Sometimes it was not always found after a dissection.

  5. Estudo epidemiológico das fraturas femorais diafisárias pediátricas Epidemiological study of children diaphyseal femoral fractures

    Cassiano Ricardo Hoffmann

    2012-04-01

    Full Text Available OBJETIVO: Avaliar as características pessoais, das fraturas e do tratamento e suas complicações em pacientes com fraturas femorais diafisárias pediátricas atendidos no Serviço de Ortopedia Pediátrica do Hospital Infantil Joana de Gusmão. MÉTODOS: Trata-se de estudo retrospectivo e transversal com população composta por pacientes com fraturas diafisárias de fêmur, com idade entre o nascimento e 14 anos e 11 meses, divididos em quatro grupos etários. As informações foram obtidas nos prontuários e transferidas para o questionário de pesquisa que apresentava variáveis pessoais, das fraturas e do tratamento e suas complicações. RESULTADOS: A população do estudo foi composta por 96 pacientes. A média de idade encontrada foi de 6,8 anos. Houve predomínio no sexo masculino, fratura fechada, lado direito, 1/3 médio e traço simples. Quanto à etiologia das fraturas, houve predomínio na amostra global de acidentes de trânsito. A maioria dos pacientes (74-77,1% apresentou fratura de fêmur como lesão isolada. Houve predomínio do tratamento conservador na faixa etária menor que seis anos e do tratamento cirúrgico na faixa etária de seis anos a 14 anos e 11 meses. As complicações observadas até a união óssea foram: discrepância, infecção e limitação de movimento. O tempo médio de consolidação foi de 9,6 ± 2,4 semanas, variando com a idade. CONCLUSÃO: As características das fraturas estudadas foram semelhantes às citadas na literatura e o tratamento empregado apresentou bom resultado. O Hospital Infantil Joana de Gusmão (HIJG tem utilizado o tratamento proposto pela literatura nas fraturas femorais diafisárias pediátricas.OBJECTIVE: To evaluate the personal, fracture, treatment and complication characteristics among patients with pediatric femoral shaft fractures attended at the pediatric orthopedic service of the Joana de Gusmão Children's Hospital. METHODS: This was a retrospective cross-sectional study

  6. Emprego de fixador externo circular no tratamento de complicações de fraturas do rádio e ulna em cães de raças pequenas Use of circular external fixator in the treatment of fracture complications of radius and ulna in small breed dogs

    Sheila Canevese Rahal

    2005-10-01

    Full Text Available O objetivo deste estudo foi avaliar o método de Ilizarov no tratamento de complicações de fraturas do rádio e ulna em cães de raças pequenas. Um fixador de Ilizarov miniatura composto por anéis de alumínio e hastes de aço foi usado em três cães da raça poodle miniatura (casos 1, 2 e 3 e em um pinscher (caso 4. Os cães 1 e 4 apresentavam consolidação atrasada das porções médio-distal e distal, respectivamente, devido a prévio tratamento com tala externa. Foi aplicada uma montagem constituída por dois anéis proximais e um distal. Ambas as fraturas consolidaram, sendo que a do poodle apresentou leve desvio cranial das extremidades fraturadas. Os outros dois casos (2 e 3 consistiam de fraturas previamente tratadas por procedimento cirúrgico. O caso 2 apresentava rotação lateral do membro torácico e não-união do aspecto distal da diáfise radial com presença de pino intramedular e dois fios de cerclagem. O pino intramedular e um dos fios de cerclagem foram removidos e realizou-se a derrotação do foco da fratura. O aparelho foi montado como nos casos 1 e 4. A consolidação da fratura foi obtida com moderado desvio caudal do eixo ósseo. No caso 3, havia reabsorção óssea na diáfise do rádio e ulna devido ao emprego inadequado de fixador externo resina-pino. Empregou-se o transporte ósseo com o fixador de Ilizarov para induzir a regeneração óssea. Entretanto, este foi interrompido por falta de resposta. Manteve-se o fixador e o defeito ósseo foi tratado com enxerto esponjoso autólogo e biomateriais. A ulna ocupou parte do defeito segmentar do rádio. Foi possível concluir que o método de Ilizarov pode ser usado no tratamento de consolidação atrasada e não-união, mas o fixador externo circular é de difícil aplicação em cães de raças pequenas.The aim of this study was to evaluate the Ilizarov’s method for treating complications of radius and ulna fractures in small breed dogs. A miniature Ilizarov

  7. Endodontic therapy for a fused mandibular molar.

    Rotstein, I; Moshonov, J; Cohenca, N

    1997-06-01

    Variations in tooth morphology present a clinical challenge when endodontic treatment is required. A case of conservative endodontic therapy for a fused mandibular second and third molar is presented.

  8. Mandibular incisor apicoectomy in a Canadian Beaver.

    Steenkamp, Gerhard; Venter, Leon; Crossley, David; Buss, Peter

    2009-01-01

    A 52-month-old Canadian beaver was presented for treatment of lip trauma resulting from overgrowth of the right mandibular incisor tooth following earlier loss of the right maxillary incisor tooth. Extraction of the affected tooth was considered, but rejected due to the length of the embedded portion of rodent mandibular incisor teeth. The lip injury was managed by crown reduction (odontoplasty) of the overgrowing incisor tooth pending a more permanent treatment plan. A 2-cm apicoectomy of the right mandibular incisor tooth was performed to arrest growth of the tooth when the beaver was 82-months-old. The remainder of the tooth continued to erupt and was completely expelled during a 9-month period with one additional odontoplasty being required. The beaver continued to feed normally with just the left maxillary and mandibular incisor teeth until its death at 118-months, with odontoplasty performed twice on the remaining incisor teeth during the 30-months following exfoliation.

  9. Management of Pediatric Mandibular Fracture Using Orthodontic ...

    2017-05-22

    May 22, 2017 ... The pediatric patient is a challenge to manage and ... and osteosynthesis of the pediatric fracture with titanium ... impression material and surgical model prepared with ... circum-mandibular wire were removed under local.

  10. Eosinophilic granuloma of the mandibular condyle

    Huh, Kyung Hoe; Yi, Won Jin; Oh, Sung Won; Lee, Sam Sun; Choi, Mun Kyung

    2008-01-01

    The present study reports a case of eosinophilic granuloma of the mandibular condyle. Eosinophilic granulomas on the mandibular condyle are very rare, but there are several common clinical and radiographic presentations. The clinical presentations involve swelling on preauricular area, limitation of opening, TMJ pain, etc. The radiographic presentations involve radiolucent lytic condylar lesion with or without pathologic fracture. Sometimes new bone formations are observed. The purpose of the article is to add new cases to the literatures.

  11. Eosinophilic granuloma of the mandibular condyle

    Huh, Kyung Hoe; Yi, Won Jin; Oh, Sung Won; Lee, Sam Sun [Department of Oral and Maxillofacial Radiology, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul (Korea, Republic of); Choi, Mun Kyung [Department of Oral and Maxillofacial Surgery, College of Medicine, Inje University Sanggye Paik Hospital, Seoul (Korea, Republic of)

    2008-03-15

    The present study reports a case of eosinophilic granuloma of the mandibular condyle. Eosinophilic granulomas on the mandibular condyle are very rare, but there are several common clinical and radiographic presentations. The clinical presentations involve swelling on preauricular area, limitation of opening, TMJ pain, etc. The radiographic presentations involve radiolucent lytic condylar lesion with or without pathologic fracture. Sometimes new bone formations are observed. The purpose of the article is to add new cases to the literatures.

  12. Facial fractures: a 1-year retrospective study in a hospital in Belo Horizonte Fraturas de face: um estudo retrospectivo de 1 ano em um hospital de Belo Horizonte

    Bruno Ramos Chrcanovic

    2004-12-01

    Full Text Available A retrospective study was performed to assess facial fractures in patients treated at a public hospital in Belo Horizonte, in 2000. The data collected included age, gender, etiology, distribution of maxillofacial trauma considering day of the week and month, anatomic site of the fracture, and treatment. The analyses involved descriptive statistics and chi-squared test, Bonferroni test and analysis of variance. A total of 1,326 facial fractures were found in 911 patients. Most fractures occurred in adults with age ranging from 21 to 30 years. Men were more affected than women, with a male-female ratio of 4.69:1. Accidents causing facial fractures occurred predominantly on weekends. Bicycle and motorcycle accidents were the major cause of trauma, followed by interpersonal violence, automobile accidents, and falls. When the relation between the gender and the etiology of facial fractures was analyzed, a significant relation was noted between these variables (p Um estudo retrospectivo foi realizado para avaliar fraturas faciais em pacientes atendidos no ano de 2000 em um hospital público de Belo Horizonte. As informações coletadas incluíam idade, sexo, etiologia, distribuição do trauma de acordo com o dia da semana e o mês, o local anatômico da fratura e o tratamento. As análises envolveram estatísticas descritivas, teste qui-quadrado, teste Bonferroni e análise de variância. Foram encontradas 1.326 fraturas de face em 911 pacientes. A maioria das fraturas ocorreu em adultos na faixa etária de 21 a 30 anos. Os homens foram mais acometidos do que as mulheres, numa proporção homem:mulher de 4,69:1. Os traumas causadores de fraturas faciais ocorreram predominantemente nos fins de semana. Os acidentes de moto e bicicleta foram a maior causa de trauma, seguidos por violência interpessoal, acidentes automobilísticos e quedas. Quando analisada a relação entre o gênero e a etiologia das fraturas de face, observou-se uma associa

  13. Fatores predisponentes para infecção em pacientes portadores de fraturas expostas e criação de escore

    Lima, Lucynara Gomes

    2013-01-01

    Os principais objetivos do tratamento ortopédico das fraturas expostas são a prevenção de infecção, estabilização da lesão óssea e restauração da função do membro. A prevenção da infecção, entretanto, representa a principal medida para que os outros objetivos possam ser alcançados. Objetivo. Identificar os fatores de risco associados à infecção em pacientes acometidos por fraturas expostas, utilizando a força de associação destes fatores para propor um escore que possibilite a estratificação ...

  14. Locating Mandibular Foramen in Children with Mandibular Retrognathism in Mixed Dentition

    Mehrsa Paryab

    2015-06-01

    Full Text Available Background and aims. One of the most common reasons forthe inferior alveolar nerve block anesthesia failure is the variation in mandibular foramen location. The aim of this study was to assess the location of mandibular foramen in chil-dren with mandibular retrognathism in comparison to children with normal skeletal occlusion in the mixed dentition. Materials and methods. One hundred and twenty panoramic radiographs of patients in mixed dentition period, undergo-ing orthodontic treatment, were selected based on inclusion criteria, skeletal occlusion and stage of dental development. The radiographs were divided into two groups: I: 60 panoramic radiographs of patients with normal skeletal occlusion (15 in each of the Hellman dental age stages; II: 60 panoramic radiographs of patients with mandibular retrognathism (15 in each of the Hellman dental age stages. The radiographs were traced and the linear distance from the mandibular foramen to the borders of the mandibular ramus and its angular position were identified. The measurements were compared between the two groups and among the four dental age groups by t-test, ANOVA and post hoc tests. Results. No statistically significant differences werefound between the patients with normal skeletal occlusion and patients with mandibular retrognathism (P>0.05. Statistical tests showed significant differences in the vertical location of mandibu-lar foramen and gonial angle between the four dental age groups (P<0.05. Conclusion. Mandibular retrognathism does not have a significant impact on the location of the mandibular foramen in the mixed dentition period. The child’s dental age would be considered in the localization of the mandibular foramen.

  15. [Orthodontic treatment of Class III patients with mandibular asymmetry].

    Duan, Yin-Zhong; Huo, Na; Chen, Lei; Chen, Xue-Peng; Lin, Yang

    2008-12-01

    To investigate the treatment outcome of Class III patients with dental, functional and mild skeletal mandibular asymmetry. Thirty-five patients (14 males and 21 females) with dental, functional and mild skeletal mandibular asymmetry were selected. The age range of the patients was 7 - 22 years with a mean age of 16.5 years. Dental mandibular asymmetry was treated with expansion of maxillary arch to help the mandible returning to normal position. Functional mandibular asymmetry was treated with activator or asymmetrical protraction and Class III elastics. Mild skeletal mandibular asymmetry was treated with camouflage treatment. Good occlusal relationships were achieved and facial esthetics was greatly improved after orthodontic treatment in patients with dental and functional mandibular asymmetry. However, patients with skeletal mandibular asymmetry should be treated with both extraction and genioplasty. Orthodontic treatment was suitable for patients with dental and functional mandibular asymmetry, while combined orthodontics and surgery could get good results in patients with skeletal mandibular asymmetry.

  16. Fratura de órbita por queda de cavalo e correção de estrabismo Orbit fracture by horse fall and strabismus correction

    Abelardo de Souza Couto Junior

    2010-06-01

    Full Text Available Descreve-se uma paciente com fratura orbitária grave causada por queda de cavalo. Relato do seu tratamento cirúrgico com correção do estrabismo e tentativa de correção da enoftamia.Description of a patient with orbital fracture cause by a horse fall. Follow-up the surgical treatment of the strabismus and the enophtlamos.

  17. The effects of orthognathic surgery on mandibular movements in patients with mandibular prognathism

    Sinobad Vladimir

    2012-01-01

    Full Text Available Introduction. Mandibular prognathism, one of the most severe dentofacial deformities, affects the person’s appearance, psychological health and the quality of life in the most sensitive age period. Objective. The aim of this study was to evaluate the effects of sagittal split ramus osteotomy on the range of mandibular border movements in the early postoperative period. Methods. The study was conducted on 20 patients, of mean age 20.8 years, with mandibular prognathism. All patients included in this study were operated on by bilateral sagittal spliting ramus osteotomy according to Obwegeser and Dal Pont followed by mandibular immobilization during eight weeks. In all patients mandibular border movements were recorded before and six months after surgery using the computerized pantograph Arcus-Digma (KaVo EWL GmbH, Leutkirch, Germany. Results. The analysis of the chosen kinematic parameters revealed that sagittal split ramus osteotomy followed by eight weeks of mandibular immobilization had severe effects on the mouth opening. Six months after surgery the range of maximal mouth opening decreased for approximately 13.9 mm in relation to the preoperative stage. On the contrary, the ranges of maximal protrusion and the border of laterotrusive excursions increased significantly after surgery. Conclusion. In patients with mandibular prognathism where enormous mandibular growth was the main causal factor of the deformity, the sagittal split ramus osteotomy yielded good results. The rigid fixation of bone fragments and reduced period of mandibular immobilization followed by appropriate physical therapy could considerably contribute to a more rapid recovery of mandibular kinematics in the postoperative period.

  18. Insuficiência renal aguda em paciente tratada com ATRA e anfotericina B: relato de caso

    Gelcimar Moresco

    2011-06-01

    Full Text Available O presente relato apresenta o caso clínico de uma paciente com leucemia promie-locítica aguda tratada com ácido todo-transretinoico (ATRA, que apresentou suspeita de síndrome do ácido transreti-noico (síndrome de ATRA. Com a ocor-rência de leucopenia febril inespecífica, foram associados ao tratamento antimi-crobianos e antifúngicos. A diminuição da função renal, observada inicialmente, contribuiu para a suspeita de síndrome de ATRA, que foi agravada pelos antifúngi-cos. Assim, o uso de ATRA foi suspenso, mas somente 8 dias depois foi caracteriza-da pneumonia e descartada a hipótese de síndrome de ATRA. Nesse contexto, foi discutida a nefrotoxicidade do ATRA e a potencialização desse efeito adverso pelo uso de antifúngicos nefrotóxicos, em par-ticular da anfotericina B, assim como a im-portância do diagnóstico diferencial entre síndrome de ATRA e doença infecciosa.

  19. CARACTERÍSTICAS CRISTALOQUÍMICAS DE LA HIDROXIAPATITA SINTÉTICA TRATADA A DIFERENTES TEMPERATURAS

    Marta Elena Londoño

    Full Text Available La hidroxiapatita sintética (HA es un fosfato de calcio con una composición química muy similar a la del hueso humano, lo cual la hace biocompatible con los tejidos vivos. La biocompatibilidad posibilita su uso en variadas aplicaciones médicas. En esta investigación se realizó un seguimiento a las propiedades cristaloquímicas de muestras de HA sintética tratadas a diferentes temperaturas, las que se sometieron a solución fisiológica de Ringer durante periodos de 5 y de 30 días. La medición de la conductividad y el análisis de las muestras, por medio de espectrofotometría UV-VIS, análisis por ion selectivo, DRX, FTIR y SEM, permitieron mostrar la gran dependencia de la cristalinidad con el tratamiento térmico. La muestra más cristalina se obtuvo a una temperatura de 1050 °C. La mayor solubilidad se presentó en las muestras más cristalinas; además, se evidenció la presencia de dos mecanismos que compiten cuando las muestras se someten a solución Ringer: la disolución y la precipitación.

  20. Redução fechada e fixação esquelética externa tipo I para tratamento de fraturas de tibiotarso em pombos domésticos (Columba livia

    Alievi M.M.

    2002-01-01

    Full Text Available Estudaram-se a redução fechada e a fixação esquelética externa tipo I para o tratamento de fraturas de tibiotarso em 10 pombos domésticos (Columba livia adultos. As aves foram anestesiadas com a associação de xilazina e cetamina e em seguida foi realizada fratura do tibiotarso direito por pressão digital sobre a diáfise do membro. Quatro pinos de Kirschner, dois proximais e dois distais à linha da fratura, foram inseridos percutaneamente através de ambas as corticais ósseas e, após redução fechada da fratura, conectados externamente por uma barra de acrílico autopolimerizável na face lateral do membro. Em três aves foi observado radiograficamente desvio ósseo angular, porém, a função do membro não foi afetada. O tempo médio e o desvio-padrão para a cicatrização óssea foram 23,4± 3,0 dias. Os resultados demonstram que a redução fechada e a aplicação de fixador esquelético externo tipo I é um método efetivo para o tratamento de fraturas de tibiotarso em pombos domésticos (Columba livia.

  1. Mandibular Deformity Correction by Distraction Osteogenesis

    Md Asaduzzaman

    2011-02-01

    Full Text Available Distraction osteogenesis (DO is a biological process of new bone formation. It could be used as an alternative treatment method for the correction of mandibular hypoplastic deformity. Modern distraction osteogenesis evolved primarily from the work of Gavriel llizarov. DO has been first applied to craniofacial region since McCarthy et al. In this case report, the patient was 17 years old male with bird face deformity due to hypoplasia of mandible resulted from bilateral TMJ ankylosis due to the fracture of both condyle at the age of 4 years. Patient’s intraincisal opening was absent 1 year back. He underwent condylectomy in both sides to release the ankylosis and to increase intraincisal opening. His mandibular length was markedly short. To increase his mandibular antero-posterior length, mandibular body distraction was done in Oral and Maxillofacial Surgery department, BSMMU. Through this procedure length of the body of mandibule was increased by 10 mm, occlusion was edge to edge and his lower facial appearance increased markedly. Mandibular body distraction osteogenesis was considerably effective when performed in a hypoplastic mandible to facilitate post-operative functional and esthetic restoration. Long term follow-up is necessary to evaluate relapse and complications. DOI: 10.3329/bsmmuj.v3i2.7061BSMMU J 2010; 3(2: 103-106

  2. Estudo do tratamento das fraturas da cabeça do fêmur Study of the treatment of femoral head fractures

    Rodrigo Pereira Guimarães

    2010-01-01

    Full Text Available OBJETIVO: Estabelecer diretrizes para o tratamento das fraturas da cabeça femoral e determinar a melhor via de acesso nos casos tratados cirurgicamente. MÉTODOS: Avaliamos os resultados clínicos e radiográficos de 13 pacientes (13 fraturas tratados cirurgicamente entre maio de 1986 e julho de 1996 no Departamento de Ortopedia e Traumatologia da Santa Casa de Misericórdia de São Paulo (SCMSP, Pavilhão "Fernandinho Simonsen". RESULTADOS: Entre as seis fraturas Pipkin 1, cinco foram submetidas à ressecção do fragmento, o que nos levou a quatro resultados excelentes e um bom, sendo este com fixação do fragmento. Três pacientes apresentaram fraturas Pipkin 2 e todas foram fixadas, observados dois excelentes resultados e um regular. Dois pacientes Pipkin 3 foram submetidos à artroplastia primária. Dos dois pacientes com lesão Pipkin 4, um foi tratado com redução e osteossíntese da fratura do acetábulo, sem abordar o fragmento da cabeça que estava bem reduzido e resultou em artrose precoce, e o outro foi submetido à artroplastia total como tratamento primário. CONCLUSÃO: Concluímos após comparação da revisão da literatura com a análise dos nossos casos, que o tratamento da fratura da cabeça femoral deve ser cirúrgico e a escolha da via de acesso vai depender do tipo de fratura.OBJECTIVE: To establish guidelines for the treatment of femoral head fractures and to determine the best form of access in cases treated surgically. METHODS: We evaluated the clinical and radiological results of 13 patients (13 fractures treated surgically, between May 1986 and July 1996, at the Department of Orthopedics and Traumatology at the Santa Casa de Misericórdia de São Paulo (SCMSP, Fernandinho Simonsen Pavillion. RESULTS: Among six Pipkin 1 fractures, five had resection of the fragment, resulting in four excellent and one good result. The good result had fixation of the fragment. All three Pipkin 2 fractures had fixation of the fragment

  3. Rotational Distraction for the Treatment of Severe Mandibular Retrognathia.

    Ito, Osamu; Mitsugi, Masaharu; Alcalde, Rafael E; Yano, Tomoyuki; Uemura, Noriko; Okazaki, Mutsumi

    2015-07-01

    The main problem with intraoral distraction of the mandible is the inability to achieve the three-dimensional mandibular correction as planned preoperatively. We developed a technique that allows spontaneous changes in the direction of mandibular elongation using an intraoral distractor. After mandibular osteotomy, the distractor is fixed to the distal segment of the mandible using a single bicortical screw, allowing anterior-posterior, vertical and limited lateromedial changes in the vector of distraction. Mandibular lengthening is performed while keeping the maxilla and mandible in class I occlusion with intermaxillary fixation. As the distraction device is activated allowing mandibular elongation, the proximal segment, guided by the surrounding soft tissues, moves and rotates posterosuperiorly. Mandibular lengthening is continued until the condylar head reaches an adequate position in the mandibular fossa as confirmed clinically and radiographically. Thirty-three patients with mandibular retrognathia received this treatment and good results were obtained.

  4. Variant Root Morphology of Third Mandibular Molar in Normal and ...

    isaac kipyator

    2017-11-12

    Nov 12, 2017 ... ABSTRACT. The mandibular third molar poses a challenge to dental surgeons due to it's unpredictable morphology ... treatment in the School of Dental Sciences since 2010. ... mandibular third molar include presence of three.

  5. Congenitally missing mandibular second premolars: clinical options.

    Kokich, Vincent G; Kokich, Vincent O

    2006-10-01

    Congenital absence of mandibular second premolars affects many orthodontic patients. The orthodontist must make the proper decision at the appropriate time regarding management of the edentulous space. These spaces can be closed or left open. If the space will be left open for an eventual restoration, the keys during orthodontic treatment are to create the correct amount of space and to leave the alveolar ridge in an ideal condition for a future restoration. If the space will be closed, the clinician must avoid any detrimental alterations to the occlusion and the facial profile. Some early decisions that the orthodontist makes for a patient whose mandibular second premolars are congenitally missing will affect his or her dental health for a lifetime. Therefore, the correct decision must be made at the appropriate time. In this article, we present and discuss various treatment alternatives for managing orthodontic patients with at least 1 congenitally missing mandibular second premolar.

  6. A new technique for mandibular osteotomy

    Puricelli Edela

    2007-03-01

    Full Text Available Abstract Sagittal split osteotomy (SSO is a surgical technique largely employed for mandibular mobilizations in orthognatic procedures. However, the traditional design of buccal osteotomy, located at the junction of mandibular ramus and body, may prevent more extensive sliding between the bone segments, particularly on the advance, laterality and verticality of the mandibular body. The author proposes a new technical and conceptual solution, in which osteotomy is performed in a more distal region, next to the mental formamen. Technically, the area of contact between medullary-cancellous bone surfaces is increased, resulting in larger sliding rates among bone segments; it also facilitates the use of rigid fixation systems, with miniplates and monocortical screws. Conceptually, it interferes with the resistance arm of the mandible, seen as an interpotent lever of the third gender.

  7. Mandibular Condyle Fractures and Treatment Modalities

    Halil ibrahim Kisa

    2014-08-01

    Full Text Available Maxillofacial injuries are most commonly associated with falls, motor and vehicle accidents, sports-related trauma, and interpersonel violence. The complexity of mandibular condyle region and its anatomic proximity to other craniofacial structures complicate diagnosis and treatment. Thus, treatment approaches of mandibular condyle fracture are still controversial. In the literature, different success rates are reported about observation versus treatment, closed reduction versus open reduction and fixation methods. In the present article, controversial issues related to mandibular condyle fractures were reviewed under the light of current literature. In conclusion, the simplest way that can be done with the least risk of complication should be chosen during treatment planning. In addition, current adjunctive treatment methods accelerating healing of fracture should be considered. [Archives Medical Review Journal 2014; 23(4.000: 658-671

  8. Early Loaded Single Implant Reinforced Mandibular Overdenture

    K. Nischal

    2016-01-01

    Full Text Available Rehabilitating atrophied mandible with two-implant supported denture is a common treatment modality for implant retained removable overdenture in mandible. This paper aims to design a treatment modality where single implant reinforced overdenture is fabricated for a severely atrophied mandibular ridge with early loading protocol. Results of studies have shown that a single implant mandibular overdenture significantly increases the satisfaction and quality of life of patients with edentulism. Midline fracture of the prosthesis is the most common complication related to single implant and two-implant retained mandibular overdentures. To manage such complication, a thin metal mesh is used to reinforce the overdenture and also to make the prostheses lighter and cost effective as compared to conventional cast metal framework.

  9. 21 CFR 872.3960 - Mandibular condyle prosthesis.

    2010-04-01

    ... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3960 Mandibular condyle prosthesis. (a) Identification. A mandibular condyle prosthesis is a device that is intended to be implanted in the human jaw to... requirement for premarket approval for any mandibular condyle prosthesis intended to be implanted in the human...

  10. Desempenho inicial de plântulas de soja oriundas de sementes quimicamente tratadas

    Rafael Oliveira Vergara

    2016-12-01

    Full Text Available A soja atualmente é um dos principais produtos do agronegócio brasileiro. Diversos fatores afetam a produtividade da cultura, entre eles o número de plantas estabelecidas merece devido destaque. Grande parte dos produtores brasileiros utiliza o tratamento químico de sementes com objetivo de melhorar o estande inicial de plantas. Neste trabalho se objetivou avaliar o desempenho inicial de sementes de soja tratadas quimicamente com os principais produtos disponíveis no mercado. Utilizou-se dois lotes da cultivar BMX Turbo RR, com distintos níveis de vigor, estes foram submetidos aos três principais tratamentos químicos do mercado. Foram avaliada emergência, índice de velocidade de emergência, comprimento e biomassa seca de raiz, área foliar. Ocorreu diferença entre os tratamentos, no lote de baixo vigor o tratamento quatro (fludioxonil, metalaxylm e tiametoxan melhorou o desempenho, em sementes de alto vigor o tratamento não favoreceu o desempenho das sementes.Initial performance of soybean seedlings derived from chemically treated seedAbstract: Soy is currently one of the main products of the Brazilian agribusiness. Several factors affect the productivity of the culture, including the number of established plants deserves due attention. Most Brazilian producers use chemical seed treatment in order to improve the plant stand. This work aimed to evaluate the initial performance of soybean seeds chemically treated with leading products on the market. We used two batches of growing BMX Turbo RR, with different levels of vigor, these were subjected to three main chemical treatments market. emergency were evaluated, emergency speed index, length and root dry biomass, leaf area. Was no difference between treatments in the lot of low force treatment four (fludioxonil, metalaxylm and Thiamethoxam improved performance in high vigor seed treatment did not improve the performance of seeds.

  11. Enraizamento de estacas lenhosas de ameixeiras tratadas com ácido indolbutírico

    Mindêllo Neto Ubirajara Ribeiro

    2006-01-01

    Full Text Available Considerando o grande interesse pela ameixeira no mercado de frutas, existe a necessidade de buscar técnicas mais eficientes na produção de mudas de qualidade e com maior uniformidade. Buscou-se, neste trabalho, verificar o potencial de enraizamento de estacas lenhosas de 12 cultivares de ameixeira (América, Amarelinha, Letícia, Pluma 7, Reubennel, Rosa Mineira, Santa Rita, Santa Rosa, Simka, The First, Wade e XV de novembro tratadas com ácido indolbutírico (AIB, em concentrações de 0, 1000 e 3000mg L-1, em imersão rápida por 5 segundos na sua parte basal. O estudo foi desenvolvido de junho a setembro de 2004, na EMBRAPA Transferência de Tecnologia, localizada no município de Canoinhas, SC. Estacas lenhosas foram coletadas de plantas matrizes de dois anos, situadas em casa-de-vegetação e padronizadas com um comprimento médio de 12cm e diâmetro de 6mm, sendo acondicionadas em bandejas de poliestireno expandido com 72 células de 0,000015m3, contendo vermiculita como substrato e mantidas em casa de vegetação sem nebulização intermitente por 97 dias. O delineamento experimental foi o inteiramente casualizado com quatro repetições e 12 estacas por parcela. As maiores porcentagens de enraizamento (acima de 70% foram obtidas nas estacas das cultivares XV de Novembro, Rosa Mineira e Santa Rita. A aplicação de 1000mg L-1 AIB, foi melhor no enraizamento de estacas de ameixeira proporcionando maior número de raízes por estaca e maior comprimento das raízes.

  12. Resultados do tratamento das fraturas da diáfise do fêmur ipsilaterais às do colo ou transtrocantérica Outcomes in treatment of diaphiseal femur fractures ipsilateral to the neck or transtrocanteric fracture

    Nelson Astur Neto

    2010-01-01

    Full Text Available OBJETIVO: Avaliação radiográfica, funcional e das complicações do tratamento cirúrgico das fraturas diafisárias do fêmur associadas à fratura transtrocantérica ou do colo do mesmo fêmur. MÉTODOS: De 2002 a 2007 foram tratados 17 pacientes. Eram masculinos 88% e a idade média foi de 31 anos e três meses. Dez (59% apresentavam associação com fratura do colo do fêmur e sete (41% com a fratura transtrocantérica. Foram avaliados a dor residual e a amplitude de movimento articular do quadril e joelho, a consolidação radiográfica e o tipo de implante utilizado, pela avaliação atual e retrospectivamente pelo prontuário, com um seguimento médio de 48 meses. RESULTADOS: Todas as fraturas transtrocantéricas evoluíram para consolidação sem deformidade residual. Das fraturas do colo, três (30% apresentaram retardo da consolidação, e duas consolidaram em varo. Dois pacientes apresentaram retardo de consolidação da fratura diafisária. Todas as fraturas associadas trans-diáfise apresentaram resultado funcional excelente ou bom. Das associadas colo-diáfise, sete (70% apresentaram resultado funcional excelente ou bom, dois regular e um ruim. CONCLUSÃO: As fraturas associadas da diáfise do fêmur com fratura transtrocantérica apresentaram melhor resultado radiográfico e funcional com menos complicações que a associação da fratura diafisária com a fratura do colo do fêmurOBJECTIVE: To perform a radiographic and functional evaluation of the complications of diaphyseal fractures of the femur associated with ipsilateral fractures of the trochanter or the neck of the femur. METHODS: From 2002 to 2007, seventeen patients were treated, of which 88% were men, with a mean age of thirty-one years and three months. Ten (59% had associated fractures of the femoral neck and seven (41% had associated trochanteric fractures. The final range of motion of the hip and knee, the radiographic fracture consolidation, and the type of

  13. Mandibular reconstruction using bone allografts

    Chang Joon Yim

    1999-01-01

    . Combinations of allografts and autografts for mandibular reconstruction have enjoyed great success since their introduction in the late 1960's and early 1970's. Due to its high osteogenic potential, marrow and cancellous bone was used for reconstruction of the mandible. For reconstruction of large defects, surgeons used a scaffold to support the cancellous bone. This practice led to the use of allogeneic bone crib in which the cancellous bone could be packed. Reconstruction of the mandible by this combination is now very commonplace

  14. Anterior mandibular apical base augmentation in the surgical orthodontic treatment of mandibular retrusion.

    Brusati, R; Giannì, A B

    2005-12-01

    The authors describe a surgical technique alternative to traditional pre-surgical orthodontics in order to increase the apical base in mandibular retrusion (class II, division I). This subapical osteotomy, optimizing inferior incisal axis without dental extractions and a long orthodontic treatment, associated to genioplasty permits to obtain an ideal labio-dento-mental morphology. This procedure avoids in some cases the need of a mandibular advancement and, if necessary, it reduces his entity with obvious advantages.

  15. Pediatric mandibular fractures: a free hand technique.

    Davison, S P; Clifton, M S; Davison, M N; Hedrick, M; Sotereanos, G

    2001-01-01

    The treatment of pediatric mandibular fractures is rare, controversial, and complicated by mixed dentition. To determine if open mandibular fracture repair with intraoral and extraoral rigid plate placement, after free hand occlusal and bone reduction, without intermaxillary fixation (IMF), is appropriate and to discuss postoperative advantages, namely, maximal early return of function and minimal oral hygiene issues. A group of 29 pediatric patients with a mandibular fracture were examined. Twenty pediatric patients (13 males and 7 females) with a mean age of 9 years (age range, 1-17 years) were treated using IMF. All patients were treated by the same surgeon (G.S.). Surgical time for plating was reduced by 1 hour, the average time to place patients in IMF. The patients who underwent open reduction internal fixation without IMF ate a soft mechanical diet by postoperative day 3 compared with postoperative day 16 for those who underwent IMF. Complication rates related to fixation technique were comparable at 20% for those who did not undergo IMF and 33% for those who did. We believe that free hand reduction is a valuable technique to reduce operative time for pediatric mandibular fractures. It maximizes return to function while minimizing the oral hygiene issues and hardware removal of intermaxillary function.

  16. Active Shape Analysis of Mandibular Growth

    Hilger, Klaus Baggesen; Larsen, Rasmus; Kreiborg, Sven

    2003-01-01

    This work contains a clinical validation using biological landmarks of a Geometry Constrained Diffusion registration of mandibular surfaces. Canonical Correlations Analysis is extended to analyse 3D landmarks and the correlations are used as similarity measures for landmark clustering. A novel Ac...

  17. Mandibular asymmetry and the fourth dimension.

    Kaban, Leonard B

    2009-03-01

    This paper represents more than 30 years of discussion and collaboration with Drs Joseph Murray and John Mulliken in an attempt to understand growth patterns over time (ie, fourth dimension) in patients with hemifacial microsomia (HFM). This is essential for the development of rational treatment protocols for children and adults with jaw asymmetry. Traditionally, HFM was thought of as a unilateral deformity, but it was recognized that 20% to 30% of patients had bilateral abnormalities. However, early descriptions of skeletal correction addressed almost exclusively lengthening of the short (affected) side of the face. Based on longitudinal clinical observations of unoperated HFM patients, we hypothesized that abnormal mandibular growth is the earliest skeletal manifestation and that restricted growth of the mandible plays a pivotal role in progressive distortion of both the ipsilateral and contralateral facial skeleton. This hypothesis explains the progressive nature of the asymmetry in patients with HFM and provides the rationale for surgical lengthening of the mandible in children to prevent end-stage deformity. During the past 30 years, we have learned that this phenomenon of progressive distortion of the adjacent and contralateral facial skeleton occurs with other asymmetric mandibular undergrowth (tumor resection, radiation therapy, or posttraumatic defects) and overgrowth (mandibular condylar hyperplasia) conditions. In this paper, I describe the progression of deformity with time in patients with mandibular asymmetry as a result of undergrowth and overgrowth. Understanding these concepts is critical for the development of rational treatment protocols for adults with end-stage asymmetry and for children to minimize secondary deformity.

  18. Unexpected complications of bonded mandibular lingual retainers.

    Katsaros, C.; Livas, C.; Renkema, A.M.

    2007-01-01

    INTRODUCTION: The flexible spiral wire (FSW) retainer is the most frequently used type of fixed retainer bonded on all 6 anterior teeth. Our aim in this article was to demonstrate unexpected posttreatment changes in the labiolingual position of the mandibular anterior teeth associated with the use

  19. External and internal anatomy of mandibular molars.

    Rocha, L F; Sousa Neto, M D; Fidel, S R; da Costa, W F; Pécora, J D

    1996-01-01

    The external and internal anatomy of 628 extracted, mandibular first and second molars was studied. The external anatomy was studied by measuring each tooth and by observing the direction of the root curvatures from the facial surface. The internal anatomy of the pulp cavity was studied by a method of making the teeth translucent.

  20. Mandibular osteosynthesis in a Boa constrictor snake

    Jorge Luiz Costa Castro

    2014-02-01

    Full Text Available Nowadays are observed an increase in the finding of certain wild animals in urban areas, due to environmental changes caused by deforestation and economic use of natural areas. It causes disappearance of usual prey and forces these animals, including snakes, to migrate to urban areas, becoming vulnerable to injuries caused by aggressions, car accidents and capture. Mandibular and maxillar fractures are common in many animal species, representing about 3-6% of all bone fractures in dogs and cats. Mandibular trauma usually occurs as a result of fights, car accidents and improper handling and/or restraint, and fractures can be closed or open, clean or contaminated. The jaw is a flat bone with differences from the long bones that should be taken into consideration for successful treatment, being minimal muscle coverage and need to maintain occlusion factors that influence the definition of the best ostheosynthesis method. The methods of stabilization include using intramedullary pins, wires, external skeletal fixation, bone plate, and acrylic resin. Conventional bone plates are efficient but related to some complications, such as the necessity of muscular elevation and high risk of injuries to mandibular structures. This article describes the successful results of the application of plate and screws in the ostheosynthesis of a mandibular fracture in a female Boa constrictor snake with weight of 8.0 kg and length of 1.80 m, at the RIOZOO Foundation (Rio de Janeiro, RJ, Brazil.

  1. Repair of Bovine and Equine Mandibular Fractures

    Murch, K. M.

    1980-01-01

    Clinical findings, surgical repair and postsurgical care of a unilateral fracture of the mandible of a bull and of a bilateral mandibular fracture in a horse are described. Compression plating limited the pain suffered by the animals and resulted in a quick return to function of the mandibles.

  2. Cerebro-costo-mandibular syndrome with consanguinity

    Clarke, E.A.; Nguyen, V.D.

    1985-01-01

    The cerebro-costo-mandibular syndrome is a rare disorder characterized by unique posterior rib defectes, micrognathia, and mental deficiency. The mode of transmission is undetermined. This report describes the first case with documented parental consanguinity as well as hitherto undescribed CT and skeletal findings. (orig.)

  3. Oro-mandibular manifestations of primary hyperparathyroidism

    Sachin Rai

    2012-01-01

    Conclusion : Loss of lamina dura, ground glass appearance, and mandibular cortical width reduction are common findings in primary hyperparathyroidism and these are significantly correlated with elevated parathormone and alkaline phosphatase. However, the presence of brown tumors and oral tori are less commonly encountered features.

  4. Ultrasound stimulation of mandibular bone defect healing

    Schortinghuis, Jurjen

    2004-01-01

    The conclusions of the experimental work presented in this thesis are: 1. Low intensity pulsed ultrasound is not effective in stimulating bone growth into a rat mandibular defect, either with or without the use of osteoconductive membranes. 2. Low intensity pulsed ultrasound does not seem to have an

  5. Predicting pathology in impacted mandibular third molars

    Aveek Mukherji

    2017-01-01

    Full Text Available Introduction: The rising incidence of the impacted mandibular third molars and their association with pathologies is now considered a public health problem. Aims and Objectives: The objective of this study was to assess the position of impacted mandibular third molars that are prone to developing pathologies and to determine the frequency and type of pathological conditions associated with these impacted teeth to facilitate planning for their prophylactic removal. Materials and Methods: Consecutive panoramic radiographs and clinical examination of 300 patients with impacted mandibular third molars were collected. They were segregated according to Pell and Gregory’s classification, Winter’s classification, and according to their state of eruption. These were correlated with associated pathologies based on clinical and radiological criteria. Statistical Analysis Used: Descriptive statistics included computation of percentages, mean, and standard deviations. The statistical test applied for the analysis was Pearson’s Chi-square test (χ2. For this test, confidence interval and P value were set at 93% and ≤0.03, respectively. Results: The pathology most commonly associated with impacted third molars was pericoronitis, which had the highest frequency of occurrence in partially erupted, distoangular, and IA positioned (as per Pell and Gregory classification impacted teeth. Impacted mandibular third molars, which were in IA position, placed mesially, and partially erupted, were prone to develop pathologies such as dental caries and periodontitis. Conclusion: The clinical and radiographical features of impacted third molar may be correlated to the development of their pathological complications. The partially impacted mandibular third molars with mesioangularly aligned in IA position have the highest potential to cause pathological complications.

  6. PUDRICIÓN BASAL CAUSADA POR Phytophthora capsici EN PLANTAS DE CHILE TRATADAS CON VERMICOMPOST

    Lidieth Uribe-Lor\\u00EDo

    2014-01-01

    Full Text Available Pudrición basal causada por Phytophthora capcisi en plantas de chile tratadas con vermicompost. El objetivo de este trabajo fue evaluar a nivel de invernadero el efecto de vermicompost sobre la incidencia y severidad de Phytophthora capcisi en plantas de chile (Capsicum annuum. Esta investigación se realizó entre febrero y marzo del 2012 en el Centro de Investigaciones Agronómicas, Sabanilla, San José, Costa Rica. Se utilizó un diseño completamente al azar con cuatro repeticiones y ocho plantas por unidad experimental en un arreglo factorial con los factores de dosis (0, 25% y 50% v/v vermicompost:suelo e inoculación (0 y 500 zoosporas por gramo de suelo. Se trasplantaron plántulas de 35 días, que fueron inoculadas dos semanas después del trasplante. La aplicación de vermicompost provocó un aumento significativo del peso fresco foliar y del peso seco foliar y radical; a mayor dosis, mayor fue el incremento. Las plantas de todos los tratamientos que incluyeron inoculación con P. capsici presentaron síntomas de la enfermedad en la raíz. Los valores de incidencia y severidad fueron mayores para el tratamiento con 50% de abono. En este tratamiento se presentaron síntomas de marchitez. La ausencia de diferencias en las variables de peso fresco y seco entre los tratamientos inoculados y sin inocular, a los que se adicionó abono al 25%, sugiere que esta dosis podría compensar el daño causado por el patógeno. Se observó una menor concentración de nutrimentos en los tejidos de las plantas inoculadas lo que indica que el daño causado a la raíz pudo haber afectado la adquisición de nutrimentos.

  7. Pseudo-aneurisma de artéria subclávia pós fratura de clavícula: relato de caso

    ROSÁRIO, Ricardo Costa Val; RIOS, Adriana Vaggiani; FIGUEIREDO JÚNIOR, Fernando de Assis; CHRISTO, Sérgio Figueiredo Campos; SIMÃO FILHO, Charles; CHRISTO, Marcelo Campos

    1997-01-01

    Os autores descrevem a formação de um pseudo-aneurisma de artéria subclávia esquerda após trauma contuso seguido de fratura de clavícula esquerda. Comentários e uma breve revisão da literatura são mencionadosThe authors describe the left subclavian artery pseudo-aneurysm formation after blunt trauma followed by left clavicular fracture. Comments and a brief review of the literature are also mentioned.

  8. Terapêutica interdisciplinar para fratura cominutiva de côndilo por projétil de arma de fogo: enfoque miofuncional

    Bianchini,Esther Mandelbaum Gonçalves; Moraes,Rogério Bonfante; Nazario,Daniella; Luz,João Gualberto de Cerqueira

    2010-01-01

    TEMA: ferimentos causados por projéteis de arma de fogo apresentam alta incidência na região da cabeça e face. A articulação temporomandibular pode estar envolvida, além de estruturas anatômicas importantes como o nervo facial, necessitando de equipe multidisciplinar para efetuar tratamento adequado. PROCEDIMENTOS: apresentação de caso clínico de fratura condilar cominutiva causada por projétil de arma de fogo tratado de forma não-cirúrgica associado à terapia miofuncional orofacial. Paciente...

  9. Reabilitação das fraturas do rádio distal Rehabilitation of distal radius fractures

    Patrícia Silva Hampe Barbosa

    2009-01-01

    Full Text Available O objetivo deste estudo foi avaliar a evidência do efeito e eleição da conduta terapêutica nas fraturas do rádio distal. A revisão sistemática utilizou as bases de dados PubMed, Lilacs, Pedro, Cochrane, Scielo, OTseeker, sem restrições de período de publicação, com as seguintes palavras chaves: fraturas do rádio, reabilitação, terapia ocupacional, fisioterapia, incluindo línguas inglesa, espanhola, francesa e portuguesa. Os estudos encontrados foram avaliados independentemente pelos dois autores utilizando critérios da escala PEDro. Estudos não experimentais foram incluídos em busca de esclarecimentos sobre a reabilitação. Foram encontrados 22 estudos, sendo 14 ensaios clínicos controlados randomizados (ECRs. Dentre eles, quatro compararam mobilização precoce com tratamento convencional apresentando evidência moderada a favor da primeira; sete confrontaram tratamento baseado em exercícios domiciliares com tratamento em consultório apontando evidência conflitiva (um deles também comprovou eficácia de mobilização acessória passiva; e três analisaram eficácia de procedimentos terapêuticos: campo eletromagnético pulsado, drenagem linfática, ultra-som, indicando evidências limitadas. Os nove estudos não experimentais encontrados não apresentaram informações suficientes sobre os questionamentos desta pesquisa. Observou-se uma tendência dos autores em utilizar os princípios gerais da reabilitação ao elaborar condutas terapêuticas, mas os procedimentos utilizados não estão bem atestados pela literatura.The aim of this study was to assess the evidence regarding the adoption and effectiveness of therapeutic procedures employed for rehabilitation of distal radius fractures. This systematic review used the following databases: PubMed, Lilacs, PEDro, Cochrane, Scielo and OTseeker, without time restrictions. The following keywords were searched for: distal radius fracture, rehabilitation, occupational therapy

  10. Utilização da distração osteogênica mediana sagital para tratamento da atresia mandibular Mid-sagital mandibular distraction osteogenesis for treatment of lower arch crowding

    Luiz Guilherme Martins Maia

    2007-06-01

    Full Text Available OBJETIVO: relatar o tratamento de uma paciente com apinhamento severo decorrente de uma atresia maxilomandibular, tratada por meio da Distração Osteogênica da Sínfise Mandibular (DOSM. RESULTADOS: neste caso, observamos bom engrenamento dentário, diminuição do corredor bucal escuro, correção do apinhamento, boa forma de arcos e boa estética facial, num período de tempo bastante satisfatório, sem trazer dano ao tecido periodontal adjacente. CONCLUSÃO: pacientes com arcos atrésicos e apinhamento dentário podem ser beneficiados com a DOSM que, quando bem indicada, surge como uma nova forma de tratamento para casos limítrofes de apinhamento dentário, nos quais as alternativas convencionais oferecem limitações, tais como o achatamento do perfil facial, o aumento do corredor bucal e a instabilidade.OBJECTIVE: To report the treatment of a patient with severe dental crowding resulting from a maxillary mandibular atresia, treated by the osteogenic extraction of the mandible symphysis (DOSM. RESULTS: In this case there was good dental engagement, a reduction of the dark oral aisle, a correction of the crowding, good dental arch form and good facial esthetics, in a very satisfactory period of time without causing damage to the adjacent periodontal tissues. CONCLUSION: Patients with atresia arches and dental crowding can be benefited by a DOSM that when well indicated, appears as a new form of treatment in cases of maximum borderline dental crowding, in which the conventional alternatives have limitations such as flattening of the facial profile, increase in the oral aisle and instability.

  11. Avaliação epidemiológica das fraturas da coluna torácica e lombar dos pacientes atendidos no Serviço de Ortopedia e Traumatologia do Hospital Getúlio Vargas em Recife/PE

    Pereira,André Flávio Freire; Portela,Luiz Eduardo Duque; Lima,Guilherme Didier de Andrade; Carneiro,Wagner Cabral Gomes; Ferreira,Marcus André Costa; Rangel,Túlio Albuquerque de Moura; Santos,Ricardo Barreto Monteiro dos

    2009-01-01

    INTRODUÇÃO: as fraturas da coluna torácica e lombar estão se tornando mais frequentes, devido ao aumento dos acidentes de alta energia. Elas apresentam um elevado índice de morbidade e mortalidade, acarretando grandes prejuízos socioeconômicos. OBJETIVO: analisar a epidemiologia das fraturas torácicas e lombares de pacientes atendidas no Serviço de Ortopedia e Traumatologia do Hospital Getúlio Vargas em Recife (PE). MÉTODOS: este estudo é uma análise epidemiológica dos pacientes com fraturas ...

  12. [Mandibular-driven simultaneous maxillo-mandibular distraction for hemifacial microsomia with rapid prototyping technology].

    Gao, Quan-Wen; Song, Hui-Feng; Xu, Ming-Huo; Liu, Chun-Ming; Chai, Jia-Ke

    2013-11-01

    To explore the clinical application of mandibular-driven simultaneous maxillo-mandihular distraction to correct hemifacial microsomia with rapid prototyping technology. The patient' s skull resin model was manufactured with rapid prototyping technology. The osteotomy was designed on skull resin model. According to the preoperative design, the patients underwent Le Fort I osteotomy and mandibular ramus osteotomy. The internal mandible distractor was embedded onto the osteotomy position. The occlusal titanium pin was implanted. Distraction were carried out by mandibular-driven simultaneous maxillo-mandihular distraction 5 days after operation. The distraction in five patients was complete as designed. No infection and dysosteogenesis happened. The longest distance of distraction was 28 mm, and the shortest distance was 16 mm. The facial asymmetry deformity was significantly improved at the end of distraction. The ocelusal plane of patients obviously improved. Rapid prototyping technology is helpful to design precisely osteotomy before operation. Mandibular-driven simultaneous maxillo-mandibular distraction can correct hemifacial microsomia. It is worth to clinical application.

  13. Nerve injury caused by mandibular block analgesia

    Hillerup, S; Jensen, Rigmor H

    2006-01-01

    Fifty-four injection injuries in 52 patients were caused by mandibular block analgesia affecting the lingual nerve (n=42) and/or the inferior alveolar nerve (n=12). All patients were examined with a standardized test of neurosensory functions. The perception of the following stimuli was assessed......: feather light touch, pinprick, sharp/dull discrimination, warm, cold, point location, brush stroke direction, 2-point discrimination and pain perception. Gustation was tested for recognition of sweet, salt, sour and bitter. Mandibular block analgesia causes lingual nerve injury more frequently than...... inferior alveolar nerve injury. All grades of loss of neurosensory and gustatory functions were found, and a range of persisting neurogenic malfunctions was reported. Subjective complaints and neurosensory function tests indicate that lingual nerve lesions are more incapacitating than inferior alveolar...

  14. Estudo de prevalência das fraturas bucomaxilofaciais na região de Pelotas = Study of prevalence of the bucomaxilofacial fractures in Pelotas region

    Portolan, Moacir

    2005-01-01

    Full Text Available Analisamos 745 casos de fraturas bucomaxilofaciais registrados no SAME (Serviço de Arquivo Médico Estatístico da Santa Casa de Misericórdia de Pelotas e no Centro de Estudos e Reabilitação Bucomaxilofacial de Pelotas (CERBMF, no período de 10 de janeiro de 1996 a 31 de dezembro de 2000. Os dados formam colhidos e anotados em fichas, as quais totalizaram 745 casos de pacientes submetidos à cirurgia. O nariz foi o local mais atingido, seguido pelo osso zigomático e mandíbula. As agressões foram as principais causas de fraturas, seguidas por acidentes de trânsito e quedas. O gênero masculino foi o mais atingido, numa proporção de 8/2 em relação ao feminino. A faixa etária mais atingida foi a de 21 a 30 anos de idade, seguida pela de 31 a 40 anos de idade e 11 a 20 anos de idade

  15. Fixação externa em fratura completa de metacarpo em potros External fixation in complete metacarpal fracture in foals

    Marcelo Jorge Cavalcanti de Sá

    1997-08-01

    Full Text Available A regeneração de fraturas nos membros de eqüinos é complexa pelas características da espécie. Baseado em estudo biomecânico prévio, dez potros com fratura iatrogênica experimental do metacarpo tiveram redução pelo método de transfixação óssea. Cada animal foi avaliado mediante exames clínico, laboratorial e radiográfico até a recuperação. As complicações não foram significativas, exceto em um potro que requereu eutanásia. O método mostrou-se adequado e oferece estabilidade suficiente para cicatrização.The fracture healing in equine legs is a complex process due to species characteristics. Based in previous biomechanical study ten horses had iatrogenic metacarpal fractures reduced by external bone fixation. Each animal was evaluated by clinical, laboratorial and radiografic examination till complete recovery. No significant complication were observed, except one animal which was submitted to euthanasia. The method offers appropriate stability for bone healing.

  16. Fratura bilateral de primeira costela em mergulho com colete salva-vidas Bilateral first rib fracture in a dive with life vest

    Pietro de Almeida Sandri

    2010-06-01

    Full Text Available As fraturas de primeira costela são incomuns e geralmente associadas a grandes traumas torácicos a ponto de servirem como associação com a gravidade do trauma. As fraturas isoladas bilaterais de primeira costela sem grandes traumas torácicos são raramente descritas na literatura. Os sintomas podem passar despercebidos e serem minimizados dificultando o diagnóstico desta condição. O presente relato mostra um trauma direto sobre a região supraclavicular com sintomas de contusão do plexo braquial numa queda de jet ski com uso de salva-vidas. É feita uma revisão da literatura mostrando as diversas faces do problema discutindo-se o tratamento desta condição.First rib fractures are uncommon and are generally related to major thoracic traumas, so much so that they indicate the severity of the trauma. Isolated bilateral first rib fractures without major thoracic trauma are rarely described in the literature. Symptoms may go unnoticed and could be minimal, making diagnosis of this condition difficult. The present report presents a direct trauma of the supraclavicular region with symptoms of contusion of the brachial plexus, caused by a fall from a jet ski using a life vest. A review was done of literature indicating the various facets of the problem and discussing treatment of this condition.

  17. Pinos transcorticais e gesso associados à aplicação local de plasma rico em plaquetas no tratamento de fratura do III metatarsiano em potro

    Marcos Jun Watanabe

    2015-03-01

    Full Text Available Em potros até um ano de idade, as fraturas do III osso metacarpiano (McIII ou III metatarsiano (MtIII são principalmente atribuídas ao trauma. A redução aberta e a imobilização do foco com implantes constituem o tratamento cirúrgico recomendado. Uma potra com três meses de idade e 150kg, da raça Quarto de Milha, que apresentava umafratura diafisária multifragmentar em cunha do MtIII direito foi submetida à osteossíntese através datransfixação externa e gesso, associada com a aplicação intralesional deplasma rico em plaquetas (PRP. Após dois anos do tratamento, o animal iniciou programa de treinamento para corrida e, após seis meses do treinamento, correu o primeiro páreo oficial. A escolha dos métodos terapêuticos para o tratamento de fraturas em equinos deve ser baseada naquela que promova reparação precoce e de melhor qualidade, com menores riscos de complicações. Sendo assim, a associação terapêutica adotada foi considerada favorável, já que possibilitou o completo reestabelecimento da locomoção da paciente, podendo inclusive competir na sua modalidade esportiva

  18. Técnica de Doyle na correção de fratura completa em úmero de tucano (Ramphastos toco: relato de caso

    D.B.C. Lima

    2014-12-01

    Full Text Available O objetivo deste trabalho foi relatar a realização de osteossíntese no úmero esquerdo de uma ave silvestre utilizando-se a técnica de Doyle. Um tucano (Ramphastos toco sofreu uma fratura transversa completa no terço proximal do úmero esquerdo. Após avaliação clínica e procedimentos pré-operatórios, a ave foi submetida à osteossíntese. A técnica cirúrgica utilizada permitiu uma perfeita coaptação dos fragmentos ósseos, ocasionando a formação de calo ósseo e recuperação do membro afetado em um período curto de tempo, apresentando-se como opção eficaz na correção de fraturas do úmero em aves de médio porte.

  19. Surgical management of axis' traumatic spondylolisthesis (Hangman's frature Tratamento cirúrgico para a espondilolistese traumática do áxis (fratura do enforcado

    José Luiz Romeo Boullosa

    2004-09-01

    ções de fixação com "halo vest" devido a traumatismo crânio-encefálico importante. MÉTODO: De junho de 1998 a abril de 2002, foram operados dez pacientes com espondilolistese traumática do áxis. Nove foram vítimas de acidentes automobilísticos e um sofreu queda de cavalo. Quatro pacientes tinham sido submetidos a tratamento clínico, e apresentavam sinais de pseudoartrose, com dor intensa à movimentação da coluna cervical. Dois apresentavam traumatismo crânio-encefálico moderado com múltiplas fraturas de crânio. Um foi submetido a tratamento cirúrgico de hematoma extradural agudo. Três apresentavam deslocamento importante de C2 sobre C3. Os pacientes foram submetidos a artrodese das fraturas com dois parafusos de rosca parcial colocados nos pedículos de C2, atravessando-se as fraturas, o que permitiu melhor aproximação das fraturas com alinhamento de C2-C3. Em dois pacientes foi necessária a fixação adicional com placa lateral fixa nas massas laterais de C3. RESULTADOS: Nove pacientes tiveram boa evolução pós-operatória com consolidação satisfatória das fraturas, e desaparecimento dos sintomas. Um paciente teve boa evolução com consolidação das fraturas, mas permanece com dores cervicais aos esforços. CONCLUSÃO: A fixação da espondilolistese traumática do áxis com o uso de parafusos de rosca parcial, nos pedículos de C2 e através dos traços de fratura é uma boa opção para o tratamento de pacientes que apresentarem pseudoartrose após tratamento clínico, ou apresentam contraindicações para o uso do "halo vest", como fraturas da calota craniana, ou grandes lacerações de couro cabeludo.

  20. Vida de vaso de inflorescências de Epidendrum ibaguense Kunth tratadas com inibidores de etileno

    MARCELO AMARAL DE MOURA

    2010-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a influência de inibidores da síntese e ação do etileno, incluindo ácido aminooxiacético (AOA, ácido aminoetoxivinilglicina (AVG, ácido acetilsalicílico (AAS e tiossulfato de prata (STS, aplicados na forma de pulverização ou solução de condicionamento sobre a qualidade de flores cortadas de Epidendrum ibaguense. As hastes foram colhidas e imediatamente submetidas aos seguintes tratamentos: (1 pulverização com 1,0 mM de AOA; (2 pulverização com 1,0 mM de AVG; (3 pulverização com 1,0 mM de AAS; (4 pulsing com 2,0 mM de STS, por 30 minutos; (5 pulverização com 1,0 mM de AOA + pulsing com 2,0 mM de STS, por 30 minutos; (6 pulverização com 1,0 mM de AVG + pulsing com 2,0 mM de STS; (7 pulverização com 1,0 mM de AAS + pulsing com 2,0 mM de STS; (8 pulverização + pulsing com água desionizada (controle. Após os tratamentos, as hastes foram mantidas em vasos com água desionizada, renovada a cada dois dias, para evitar o desenvolvimento de microrganismos. Ao final da longevidade, o qual variou de acordo com o tratamento, as inflorescências submetidas ao AVG e AVG + STS mostraram a maior porcentagem de abertura floral, visto que promoveram aumento de 49 e 88% em relação ao controle. A taxa de abscisão também foi influenciada pelos tratamentos, pois ao oitavo dia, as inflorescências controle apresentaram cerca de 51% de queda das flores, cujo início ocorreu, principalmente, a partir do quinto dia. As inflorescências tratadas ao AAS, AOA, STS, AVG, STS + AAS, STS + AOA e STS + AVG mostraram redução de 11, 39, 47, 71, 38, 61 e 86%, respectivamente. Além disso, houve atraso de 1, 2, 3, 4, 3, 3 e 8 dias para o início da abscisão, respectivamente. A longevidade de E. ibaguense foi afetada pelos inibidores do etileno, mas com exceção de AAS e AOA, os demais tratamentos foram significativamente maiores que o controle. O STS, AVG, AAS + STS, AOA + STS e AVG + STS tiveram longevidade

  1. Incidence and characteristics of mandibular accessory canals: A radiographic investigation.

    Borgonovo, Andrea Enrico; Taschieri, Silvio; Vavassori, Virna; Re, Dino; Francetti, Luca; Corbella, Stefano

    2017-11-01

    The aim of the present study was to explore, through tridimensional reconstructions of cone-beam computed tomography (CBCT) scans, the presence and the characteristics of mandibular accessory canals. For each included participant, the presence of accessory canals was recorded. The diameter of the canal, as well as the distance between the canal walls and the walls of the mandibular bone (lingual, buccal, cranial and caudal), were measured and recorded. Mandibular accessory canals could be found in 8.8% of participants. Retromolar canals were the most frequently found accessory mandibular canals. Accessory mandibular canals were found in a relatively high number of participants through the examination of CBCT scans and tridimensional reconstruction. The presence of such structures should be considered cautiously when planning and performing surgical interventions in mandibular area. © 2017 John Wiley & Sons Australia, Ltd.

  2. [Temporo-mandibular joint. Morpho-functional considerations].

    Scutariu, M D; Indrei, Anca

    2004-01-01

    The temporo-mandibular joint is distinguished from most other synovial joints of the body by two features: 1. the two jointed components carry teeth whose position and occlusion introduce a very strong influence on the movements of the temporo-mandibular joint and 2. its articular surfaces are not covered by hyaline cartilage, but by a dense, fibrous tissue. This paper describes the parts of the temporo-mandibular joint: the articular surfaces (the condylar process of the mandible and the glenoid part of the temporal bone), the fibrocartilaginous disc which is interposed between the mandibular and the temporal surface, the fibrous capsule of the temporo-mandibular joint and the ligaments of this joint. All these parts present a very strong adaptation at the important functions of the temporo-mandibular joint.

  3. Mandibular metastasis of cholangiocarcinoma: A case report

    You, Tae Min [Dept. of Advanced General Dentistry, Dankook University, Cheonan (Korea, Republic of); Kim, Kee Dong; Jeong, Ho Gui; Park, Won Se [Advanced General Dentistry, Dankook University, Cheonan (Korea, Republic of)

    2015-12-15

    Tumors metastasizing from distant regions to the oral and maxillofacial region are uncommon, comprising only 1%-2% of all malignancies. Cholangiocarcinoma is a malignancy that arises from cholangiocytes, which are epithelial cells that line the bile ducts. These cancers are difficult to diagnose and have a poor prognosis. In this paper, we report a rare case of mandibular metastasis of cholangiocarcinoma diagnosed at the primary site and discuss the radiographic findings observed in this case.

  4. Multiple myeloma presenting as mandibular pain

    Crowley, Miriam

    2016-10-01

    Introduction: Multiple myeloma (MM) is a systemic malignancy of plasma cells defined by monoclonal production of circulating immunoglobulins. Bone pain is a presenting feature in the majority of cases. Treatment may involve intravenous use of bisphosphonates, chemotherapy or haematopoietic stem cell transplantation. Here, we illustrate a first presentation of MM in a patient with mandibular pain and discuss radiographic, diagnostic and treatment challenges of orofacial issues in patients with MM.\\r\

  5. Epidemiologia das fraturas de face em crianças num pronto-socorro de uma metrópole tropical Epidemiology of children's facial fractures in the emergency room of a tropical metropolis

    Daniel Falbo Martins de Souza

    2010-01-01

    Full Text Available OBJETIVO: Realizar um estudo epidemiológico das fraturas de face em crianças em um serviço de urgência. MÉTODOS: Estudo retrospectivo de quarenta e dois pacientes com idades variando entre zero a 17 anos, portadores de fraturas de face, tratados no Setor de Cirurgia Buco-Maxilo-Facial da Santa Casa de São Paulo, no período de janeiro de 2000 a dezembro de 2003. Os dados foram tabulados através das informações colhidas dos prontuários dos pacientes, tais como: idade, gênero, tipo de fratura, etiologia e sazonalidade. RESULTADOS: Entre os resultados encontrados, houve predominância do gênero masculino com 81% da casuística, a fratura de mandíbula foi a mais prevalente, com mais de 70% dos casos, os acidentes de trânsito e as quedas foram os agentes etiológicos que mais causaram fraturas. O verão foi a época do ano com mais casos de fratura e mais de 80% destas necessitaram de intervenção cirúrgica para o seu tratamento. CONCLUSÃO: É necessária uma política de prevenção com uma atenção especial aos acidentes de trânsito e às quedas, que foram os agentes etiológicos que mais causaram fraturas faciais.OBJECTIVE: To conduct an epidemiological study of facial fractures in children in an emergency room. METHODS: A retrospective study of forty-two patients, aged zero to 17 years, with facial fractures treated at the Department of Oral and Maxillofacial Surgery, Santa Casa de São Paulo, from January 2000 to December 2003. The data were tabulated from information retrieved from patient files, such as age, gender, type of fracture, etiology and season of occurrence. RESULTS: Among the results were a predominance of males, accounting for 81% of all cases; jaw fracture was the most prevalent, constituting more than 70% of cases; and traffic accidents and falls were the etiologic agents that caused the most fractures. Summer was the season with the greatest number of cases of fracture and more than 80% required surgical

  6. Miniplate 1.5 fixation for the repair of mandibular osteotomies in cats Fixação interna de osteotomias mandibulares com miniplacas 1.5 em gatos

    Adelina Maria da Silva

    2011-02-01

    Full Text Available Purpose: To evaluate the application of the maxillofacial miniplate 1.5 in the repair of unilateral mandibular osteotomies in cats. Methods: Twelve adult cats were divided into two groups. In group 1 (n=6, the osteotomy was performed in the body of the mandible, behind the 1st molar. In group 2 (n=6, the osteotomy was performed between the 4th premolar and 1st molar. The osteotomy was fixed with a titanium miniplate 1.5. Oral alimentation was reinitiated 24 hours after surgery. Cats were euthanized at 12 weeks postoperative. Results: Radiographs taken 1 week after surgery showed a radiolucent line. The osteotomy line was not more visible on the radiographs taken at 12 weeks postoperative. Macroscopic examination confirmed alignment and bone union of operated hemimandibles. Histological examination showed formation of woven bone within the osteotomy line. The percentage of bone tissue at these areas was measured by the histometry. There was no statistically significant difference between the values of group 1(75.07 ± 5.99 and group 2 (74.76 ± 8.54 (Mann-Whitney's test p= 0.469. Conclusion: We concluded that the use of miniplate 1.5 for the fixation of mandibular osteotomy in cats provided the main goals in the treatment of mandibular fractures: bone union, normal dental occlusion and immediate return to oral alimentation.Objetivo: Avaliar a fixação de osteotomias mandibulares unilaterais com miniplacas 1.5 em gatos. Métodos: Foram utilizados 12 gatos adultos divididos em dois grupos de seis animais cada. No grupo 1, a osteotomia foi realizada caudalmente ao 1º molar e no grupo 2, entre o 4º pré-molar e 1º molar. A osteotomia foi fixada com uma miniplaca 1.5 de titânio. A alimentação oral foi reiniciada 24 horas após a cirurgia. Os animais foram submetidos a eutanásia 12 semanas após a cirurgia. Resultados: A osteotomia pode ser notada como uma linha de radiolucência nas radiografias realizadas uma semana após a cirurgia. Essa

  7. Composição corporal de pacientes acamados por fraturas do quadril Body composition in bed-ridden adult patients by hip fracture

    Francisco José Berral

    2008-01-01

    Full Text Available As fraturas do quadril são a maior causa de hospitalização da terceira idade, e constituem um considerável encargo econômico e social. A taxa de mortalidade atual após um ano de fratura é acima de 33%, e o risco de morte é maior do quarto ao sexto mês após a fratura. O objetivo deste estudo foi de avaliar alterações na composição corporal de pacientes idosos, durante sua hospitalização por fraturas fêmur proximal, através de métodos antropométricos e análise dos valores fisiológicos de gasto energético. Foi realizado um estudo prospectivo utilizando-se 45 pacientes consecutivos com diagnóstico de fratura do quadril. Em todos os casos, foram obtidas medidas diretas e avaliações antropométricas indiretas baseadas em estimativas, nas primeiras 24 horas e repetidas após uma semana de admissão hospitalar. Após uma semana de internação houve diminuição da média do perímetro do braço (0,73 cm, p=0.0052 e da espessura da prega tricipital (1.41 mm, p=0.0181, sem haver modificação das outras variáveis estudadas. A avaliação antropométrica como um meio de se fazer um mapa da composição corporal, em conjunto com as estimativas indiretas sugeridas neste estudo, podem ajudar a determinar o estado nutricional e necessidades calóricas de pacientes idosos.Hip fractures are a major cause of hospitalization among the elderly, and constitute a considerable social and economic burden. The current mortality rate one year after hip fracture is over 33%, the risk of death is greatest 4 to 6 months after fracture. The objective of this study was to use anthropometric methods and physiological energy-expenditure values to assess changes in body composition during hospitalization, in elderly patients admitted for fractures of the proximal femur. A prospective study was performed using a consecutive sequence of 45 patients with diagnosed hip fracture. In all cases, direct measurements and indirect estimate-based anthropometric

  8. [A toddler with a mandibular fracture].

    van der Linden, E L; Bun, R J; van Os, E

    2017-01-01

    Mandibular fractures are rare in children. Symptoms of these fractures include preauricular pain and swelling, trismus and pain when opening the mouth, and they are often preceded by a fall on the chin. If the diagnosis is missed they may have serious consequences for the growth and development of the jaw. A 3-year-old boy was referred with a swelling in his left cheek, fever and vomiting. Two days earlier he had fallen on his chin. At physical examination he had severe preauricular pain on palpation and a trismus. The patient was admitted because of suspicion of a viral parotitis and the threat of dehydration. After discharge, he went to the dentist for examination of a molar that was painful to the touch. The dentist performed an orthopantomogram and discovered a fracture of the left mandibular collum. Any child with trauma to the chin should be observed for symptoms of a mandibular fracture, and if it seems necessary non-invasive radiographic examination should be performed.

  9. Fixation of zygomatic and mandibular fractures with biodegradable plates

    Degala, Saikrishna; Shetty, Sujeeth; Ramya, S

    2013-01-01

    Context: In this prospective study, 13 randomly selected patients underwent treatment for zygomatic?complex fractures (2 site fractures) and mandibular fractures using 1.5 / 2 / 2.5-mm INION CPS biodegradable plates and screws. Aims: To assess the fixation of zygomatic-complex and mandibular fractures with biodegradable copolymer osteosynthesis system. Materials and Methods: In randomly selected 13 patients, zygomatic-complex and mandibular fractures were plated using resorbable plates and sc...

  10. The efficacy of supplemental intraosseous anesthesia after insufficient mandibular block

    Samir Prohić

    2005-02-01

    Full Text Available It is a well-known scientific fact that only a small percentage of infiltration of inferior alveolar nerve is clinically proven to be efficient. The objective of this study was to determine the anesthetic efficacy of supplemental intraosseous injection, used after the insufficient classical mandibular block that didn't provide deep pulp anesthesia of mandibular molar planed for extraction. The experimental teeth consisted of 98 mandibular molars with clinical indication for extraction. Based on the history of disease, we indicated the extraction of the tooth. After that each tooth was tested with a electric pulp tester P1. We tested the pulp vitality and precisely determined the level of vitality. After that, each patient received classical mandibular block, and the pulp vitality was tested again. If the pulp tester indicated negative vitality for the certain mandibular molar, and the patient didn't complain about pain or discomfort during the extraction, the molar was extracted and the result was added to anesthetic success rate for the classical mandibular block. If, five minutes after receiving the mandibular block, the pulp tester indicated positive vitality (parameters of vitality or the patient complained about pain or discomfort (parameters of pain and discomfort, we used the Stabident intraosseous anesthesia system. Three minutes after the application of supplemental intraosseous injection the molar was tested with the pulp tester again. The anesthetic solution used in both anesthetic techniques is lidocaine with 1:100.000 epinephrine. The results of this study indicate that the anesthetic efficacy of the mandibular block is 74.5%, and that supplemental intraosseous anesthesia, applied after the insufficient mandibular block, provides pulpal anesthesia in 94.9% of mandibular molars. The difference between anesthetic efficacy of the classical mandibular block and anesthetic efficacy of the supplemental intraosseous anesthesia, applied

  11. The efficacy of supplemental intraosseous anesthesia after insufficient mandibular block.

    Prohić, Samir; Sulejmanagić, Halid; Secić, Sadeta

    2005-02-01

    It is a well-known scientific fact that only a small percentage of infiltration of inferior alveolar nerve is clinically proven to be efficient. The objective of this study was to determine the anesthetic efficacy of supplemental intraosseous injection, used after the insufficient classical mandibular block that didn't provide deep pulp anesthesia of mandibular molar planed for extraction. The experimental teeth consisted of 98 mandibular molars with clinical indication for extraction. Based on the history of disease, we indicated the extraction of the tooth. After that each tooth was tested with a electric pulp tester P1. We tested the pulp vitality and precisely determined the level of vitality. After that, each patient received classical mandibular block, and the pulp vitality was tested again. If the pulp tester indicated negative vitality for the certain mandibular molar, and the patient didn't complain about pain or discomfort during the extraction, the molar was extracted and the result was added to anesthetic success rate for the classical mandibular block. If, five minutes after receiving the mandibular block, the pulp tester indicated positive vitality (parameters of vitality) or the patient complained about pain or discomfort (parameters of pain and discomfort), we used the Stabident intraosseous anesthesia system. Three minutes after the application of supplemental intraosseous injection the molar was tested with the pulp tester again. The anesthetic solution used in both anesthetic techniques is lidocaine with 1:100.000 epinephrine. The results of this study indicate that the anesthetic efficacy of the mandibular block is 74.5%, and that supplemental intraosseous anesthesia, applied after the insufficient mandibular block, provides pulpal anesthesia in 94.9% of mandibular molars. The difference between anesthetic efficacy of the classical mandibular block and anesthetic efficacy of the supplemental intraosseous anesthesia, applied after the

  12. Bifid mandibular canal: a rare or underestimated entity?

    Ibrahim Nasseh

    2016-10-01

    Full Text Available One of the rare anatomical variations that can be of significant importance for the dentist is the bifid mandibular canal. Many complications can occur from this condition such as failure of anesthesia when performing inferior alveolar nerve block, difficulties during the surgical extraction of the third mandibular molar, and during implants placement. Therefore, good knowledge of this condition is essential. In this report, we describe the radiographic finding of a unilateral bifid mandibular canal.

  13. Reliability of mandibular canines as indicators for sexual dichotomy.

    Hosmani, Jagadish V; Nayak, Ramakant S; Kotrashetti, Vijayalakshmi S; S, Pradeep; Babji, Deepa

    2013-02-01

    Amongst the various calcified structures in the human body, teeth have gained lot of popularity in estimating the sex of an individual as they are highly resistant to destruction and decomposition. Using permanent mandibular canines many researchers have predicted a high level of accuracy in identifying the sex correctly. The purpose of our study was to gauge the effectiveness of mandibular canines in discerning sex. Fifty dental casts each of males and females were utilized for the study. Mesio-distal dimension and inter-canine distance of mandibular right and left canine was recorded using digital vernier caliper and mandibular canine index was calculated. The mean value of mesio-distal dimensions of right and left mandibular canine was slightly greater in males compared to females. The mandibular canine index was equal in both sexes. Inter-canine distance was marginally higher in males compared to females. Despite of higher values in males none of the parameters were statistically significant. The results herein bolster contemporary studies that mesio-distal dimensions of mandibular canines and mandibular canine index do not reflect sexual dimorphism and that its application should be discontinued in sex prediction among Indian populations. How to cite this article: Hosmani J V, Nayak R S, Kotrashetti V S, Pradeep S, Babji D. Reliability of Mandibular Canines as Indicators for Sexual Dichotomy. J Int Oral Health 2013; 5(1):1-7.

  14. Experimental occlusal interferences. Part V. Mandibular rotations versus hemimandibular translations.

    Christensen, L V; Rassouli, N M

    1995-12-01

    Frontal plane mandibular rotations and corresponding hemimandibular translations were studied in vitro by using direct observations of a human cadaver mandible and in vivo by using the indirect observations of rotational electrognathography. A comparison between the two methods showed that rotational electrognathography erred in measuring the clinically relevant hemimandibular translations resulting from mandibular rotations having a unilateral molar point (simulated occlusal interference) as the pivot of frontal plane torque. In vitro frontal plane rotations about a unilateral mandibular molar tooth (simulated occlusal interference) suggested that the resulting hemimandibular upward translations of the lateral portion of the mandibular condyle, contralateral to the molar tooth, would cause considerable compressive loading of the temporomandibular joint disc.

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

    Hashizume, Atsuko; Nakagawa, Yoichi; Ishii, Hisako; Kobayashi, Kaoru

    2004-01-01

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

  16. Fratura extra-articular da extremidade medial da clavícula associada à luxação acromioclavicular tipo IV: relato de caso Extra-articular fracture of the medial end of the clavicle associated with type IV acromioclavicular dislocation: case report

    Mário Chaves Correa; Lucas Braga Jacques Gonçalves; Jose Carlos Souza Vilela; Igor Lima Leonel; Lincoln Paiva Costa; Ronaldo Percopi de Andrade

    2011-01-01

    Ocorrendo isoladamente, as fraturas da clavícula e as luxações acromioclaviculares são lesões muito comuns. A combinação de uma luxação acromioclavicular e de uma fratura do terço lateral da clavícula não é rara. Entretanto, existem muito poucos casos descritos de luxações acromioclaviculares associadas a fraturas do terço médio da clavícula; aquelas associadas a fraturas do terço medial são ainda mais raras. Nós reportamos o caso de um indivíduo adulto do sexo masculino que sofreu uma luxaçã...

  17. Corrosão de parafusos fixados à madeira tratada com soluções de creosoto vegetal

    Paes,Juarez Benigno; Benedito Rocha,Vital; Della Lucia,Ricardo Marius; Della Lucia,Terezinha Maria Castro

    2002-01-01

    O objetivo desta pesquisa foi avaliar a corrosão de parafusos auto-rosqueáveis fixados à madeira tratada com soluções preservativas preparadas com creosoto vegetal, em condições de campo. Obteve-se o creosoto vegetal bruto por meio da destilação à temperatura de 110 - 255masculineC do alcatrão vegetal. Uma fração dos destilados foi lavada com solução a 9% de bicarbonato de sódio, obtendo-se o creosoto vegetal purificado. Ambas as frações foram enriquecidas com 3% de naftenato de cobre; 3% de ...

  18. Estudo observacional comparativo de fraturas em crianças e adolescentes Epidemiologic comparative study of fractures in children and adolescents

    Roberto Guarniero

    2011-01-01

    Full Text Available Objetivos: 1 Analisar comparativamente a incidência de fraturas na criança e no adolescente em três centros universitários de atendimento. 2 Estudar o acometimento segundo a faixa etária, o sexo, o tipo de acidente, a localização anatômica, a localização no osso, o tipo de fratura, a associação com outras lesões e o tratamento. 3 Em relação ao tipo de fratura e seu tratamento, avaliar se os programas de ensino e treinamento desenvolvidos atualmente, tanto na graduação como na pós-graduação Lato sensu (residência médica e especialização estão condizentes com as necessidades do médico para o atendimento diário nos diferentes serviços de emergência de nosso País. Métodos: Estudo prospectivo transversal e observacional. Estudados os prontuários de 543 pacientes, no grupo etário de um dia de vida a 19 anos, atendidos em um período de três meses em três hospitais universitários, com uma ficha especialmente idealizada para determinar as características gerais das fraturas nesta série de pacientes. Resultados: Observamos a incidência de 531 fraturas (isoladas e 12 luxações nos 543 pacientes, sendo, em relação ao sexo, 394 meninos (72,5% e 149 meninas (27,4%. Segundo a etiologia dos traumatismos, o episódio “queda da própria altura” foi o que apresentou a maior incidência, seguido pela “queda de altura”, caracterizando um traumatismo mais grave. Observamos o maior acometimento dos membros superiores em relação aos membros inferiores, sendo 404 fraturas nos superiores (com 11 luxações, representando 76,08% das fraturas e 127 nos inferiores, que representam 23,91%. Conclusões: 1 Em função da casuística estudada, podemos concluir que campanhas educativas devem ser realizadas com conteúdo que enfatize as causas e a prevenção da “queda da própria altura”. 2 Os programas de treinamento do especialista devem enfatizar a maior ocorrência dos traumatismos e lesões dos membros superiores, bem

  19. Fraturas de odontoide tipo III com necessidade de tratamento cirúrgico: estudo de série de casos e revisão de literatura Fracturas de odontoides tipo III con necesidad de tratamiento quirúrgico: estudio de série de casos y revisión de la literatura Type III odontoid fractures requiring surgical treatment: a case series study and literature review

    Alan Robert Wieczorek

    2011-01-01

    Full Text Available OBJETIVO: Analisar uma série de pacientes com fraturas de odontoide do tipo III, instáveis, tratados cirurgicamente. MÉTODOS: Análise retrospectiva de uma série de 5 casos consecutivos de pacientes com fratura de odontoide do tipo III, submetidos a tratamento cirúrgico. RESULTADOS: Três pacientes foram tratados inicialmente com halo-veste e, nos casos de falha, foram submetidos a osteossíntese cirúrgica. Dois pacientes, um com grande instabilidade radiológica em flexão e compressão medular e outro com comprometimento neurológico, foram submetidos a tratamento cirúrgico primário. A técnica cirúrgica foi individualizada para cada caso. Não ocorreram complicações graves; quatro pacientes evoluíram assintomáticos e somente um paciente desenvolveu dor cervical não incapacitante. A tomografia computadorizada (TC mostrou consolidação da fratura em 2 casos, os demais não realizaram TC de controle. O seguimento médio foi de 1,9 anos. CONCLUSÕES: Fraturas de odontoide do tipo III nem sempre são lesões benignas, sendo importante individualizar seu tratamento sempre que alguma característica incomum for identificada. Existem critérios de instabilidade e indicação de tratamento cirúrgico para pacientes com este tipo de lesão.OBJETIVO: Analizar los casos de una serie de pacientes con fracturas de odontoides del tipo III inestables, tratadas quirúrgicamente. MÉTODOS: Análisis retrospectiva de una serie de 5 casos consecutivos de pacientes con fractura de odontoides del tipo III, sometidos a tratamiento quirúrgico. RESULTADOS: Tres pacientes fueran tratados al comienzo con halo veste y, en la falla de este, se sometieron a osteosíntesis quirúrgica. Dos pacientes, uno con inestabilidad radiológica importante en flexión y compresión medular y otro con déficit neurológico se sometieron a tratamiento quirúrgico primario. La técnica quirúrgica se individualizó para cada uno de los casos. No ocurrieron complicaciones

  20. O emprego de hastes intramedulares bloqueadas no tratamento das fraturas diafisárias do úmero Use of blocked intramedullary shaft for the treatment of humeral diaphyseal fractures

    Fernando Baldy dos Reis

    2005-01-01

    Full Text Available Estudamos os resultados clínicos e radiográficos de 31 pacientes portadores de fraturas diafisárias do úmero que foram operados com hastes intramedulares. Destes quatro apresentaram fraturas no local da inserção da haste e foram tratados com outro método. Dos 27 pacientes restantes o índice de consolidação foi de 96,1 % e que durou em média de 63,4 dias. Cinco queixaram-se de dor no ombro e em apenas um apresentou limitação da abdução. Paralisia temporária do nervo radial foi constatada em dois pacientes e pseudartrose em um que após 5 meses da cirurgia foi submetido a nova intervenção cirúrgica com o emprego de placa e enxerto ósseo autólogo. Concluímos que embora o emprego de hastes intramedulares bloqueadas apresentou alto índice de a via de acesso retrógrada pode levar a fraturas no seu ponto de entrada e via anterógrada com violação do manguito rotador pode gerar dores no ombro.Clinical and radiographic outcomes of 31 patients with humeral diaphyseal fractures submitted to surgery with intramedullary shafts were studied. From these, four patients presented fractures at the shaft insertion site and were treated using a different method. From the 27 patients left, the healing rate was 96.1%, with an average duration of 63.4 days. Five of them complained of pain in the shoulder and only one presented abduction limitation. Temporary palsy of the radial nerve was found in two patients and pseudoarthrosis in one of them, who was submitted to a new surgical intervention with plate and autologous bone graft, after 5 months. It was concluded that, although blocked intramedullary shafts presents a high incidence of the retrograde access port leading to fractures in its insertion site and the anterograde port causing pain in the shoulder.

  1. Anquilosis mandibular: una frecuente secuela por Noma Mandibular ankylosis: a Noma frequent sequel

    R. Fernández García-Guilarte

    2009-12-01

    Full Text Available Conocemos poco sobre el Noma o Enfermedad Cancrum Oris. Esta entidad afecta a niños con malnutrición crónica, poca higiene oral, poco desarrollo sanitario y enfermedades concurrentes debilitantes. Existe un consenso general sobre que el Noma empieza como una gingivitis; en su fase aguda, puede haber respuesta al tratamiento antibiótico, no obstante, las secuelas tras su curación incluyen daños estéticos y funcionales variables, que pueden requerir cirugía reconstructiva. Presentamos 3 casos de anquilosis mandibular que en el examen preoperatorio presentaron dimorfismo mandibular, fusión de hueso maxilar y mandibular y anquilosis de la articulación témporomandibular. La ortopantografía y la Tomografía Axial Computerizada (TAC fueron muy útiles en la planificación de la cirugía. El tratamiento quirúrgico consistió en todos los casos en la resección del hueso anquilótico y la reconstrucción con injerto condrocostal en uno de los casos. En el postoperatorio se siguió fisioterapia intensiva. Clínicamente todos los pacientes mostraron una gran mejoría en la masticación, la alimentación y el habla, obviamente debido a una buena oclusión. El problema más común fue la baja colaboración en la rehabilitación mandibular por parte de los pacientes.Little is known about Noma or Cancrum Oris Disease. This entity affects to children with chronic malnutrition, poor oral hygiene, poor environmental sanitation and debilitating concurrent illness. There is general consensus that noma starts as gingivitis. The acute stage responds readily to antibiotic treatment. The sequelae after healing include variable functional and aesthetic impairments, which require reconstructive surgery. We report 3 cases of mandibular ankylosis. Preoperative examination revealed mandibular dismorphism, fusion of maxilla and mandible and ankylosis of the temporomandibular joint. Orthopantography and Computed Thomography scan (TCS were very useful in planning

  2. Augmented mandibular bone structurally adapts to functional loading

    Verhoeven, J. W.; Ruijter, J. M.; Koole, R.; de Putter, C.; Terlou, M.; Cune, M. S.

    2013-01-01

    Long-term changes in trabecular bone structure during the 10 years following onlay grafting with simultaneous mandibular implant placement were studied. Extraoral radiographs of both mandibular sides in eight patients were taken regularly. Bone structure was analysed using a custom-written image

  3. Prospective audit of mandibular fractures at the Charlotte Maxeke ...

    Objective. This study was a prospective cross-sectional clinical audit of patients with mandibular fractures at the Charlotte Maxeke Johannesburg Academic Hospital. Methods. Between 1 March and 31 August 2004, patients with mandibular fractures seen by one clinician had their details recorded. Results. The female:male ...

  4. Coronal views of the paediatric mandibular condyle on ...

    This article highlights the importance of routinely reviewing the mandibular condyle on computerised tomography brain studies in a trauma setting, that often extends to involve the mandibular condyles in the scan parameters. We discuss 4 cases seen over the last 18 months at our institution, and review the relevant ...

  5. Cerebro-costo-mandibular syndrome: Report of two cases.

    Abdalla, Wael; Panigrahy, Ashok; Bartoletti, Stefano C

    2011-01-01

    Cerebro-costo-mandibular syndrome (CCMS) is a rare syndrome that includes a constellation of mandibular hypoplasia and posterior rib defects as its basic features. Additional features can include hearing loss, tracheal cartilage abnormalities, scoliosis, elbow hypoplasia, and spina bifida. Here we report two cases of CCMS and discuss the reported long-term outcome of the disease.

  6. 21 CFR 874.3695 - Mandibular implant facial prosthesis.

    2010-04-01

    ... made of materials such as stainless steel, tantalum, titanium, cobalt-chromium based alloy... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Mandibular implant facial prosthesis. 874.3695... (CONTINUED) MEDICAL DEVICES EAR, NOSE, AND THROAT DEVICES Prosthetic Devices § 874.3695 Mandibular implant...

  7. Cephalometric evaluation of surgical mandibular advancement

    Eloísa Marcantônio Boeck

    2010-06-01

    Full Text Available The treatment of Class II adult individuals with mandibular deficiency has been the combination of orthodontic treatment and orthognathic surgery. Therefore, a study was conducted in which cephalometric analysis was used to evaluate the influence of dentoalveolar decompensation in Class II patients submitted to orthodontic and surgical treatment for mandibular advancement, by bilateral osteotomy of the mandibular ramus. A sample of 15 leukoderma adult female patients were selected and three cephalometric radiographs of each patient, taken before the orthodontic treatment, before surgery and after at least 6 months postoperatively, were analyzed in a total of 45 roentgenograms. The tracings were made by the manual method and the points were digitalized using software. The results showed that values of SNB increased from 75.6 to 78.6°. The measures BNP and PGNP were reduced from -12.7 to -7.7 mm and -12.7 to -6.6 mm, respectively. For ANB there was a reduction of 3.23° (from 8.1° to 4.9°. Likewise, the values of AOBO were diminished by 6.3 mm (from 7.6 to 1.3 mm, and in the values of OJ there was a reduction of 5.7 mm (from 9 to 3.3 mm. It was concluded that the pre-surgical orthodontic treatment promoted minimal and variable dental and skeletal changes in the final result. The surgical treatment caused significant skeletal changes, especially in the measurements related to the mandible (SNB, BNP, PGNP and SNPM or indirectly to it (ANB, AOBO and OJ.

  8. Cephalometric evaluation of surgical mandibular advancement.

    Boeck, Eloísa Marcantônio; Kuramae, Mayury; Lunardi, Nádia; Santos-Pinto, Ary dos; Mazzonetto, Renato

    2010-01-01

    The treatment of Class II adult individuals with mandibular deficiency has been the combination of orthodontic treatment and orthognathic surgery. Therefore, a study was conducted in which cephalometric analysis was used to evaluate the influence of dentoalveolar decompensation in Class II patients submitted to orthodontic and surgical treatment for mandibular advancement, by bilateral osteotomy of the mandibular ramus. A sample of 15 leukoderma adult female patients were selected and three cephalometric radiographs of each patient, taken before the orthodontic treatment, before surgery and after at least 6 months postoperatively, were analyzed in a total of 45 roentgenograms. The tracings were made by the manual method and the points were digitalized using software. The results showed that values of SNB increased from 75.6 to 78.6 degrees. The measures BNP and PGNP were reduced from -12.7 to -7.7 mm and -12.7 to -6.6 mm, respectively. For ANB there was a reduction of 3.23 degrees (from 8.1 degrees to 4.9 degrees). Likewise, the values of AOBO were diminished by 6.3 mm (from 7.6 to 1.3 mm), and in the values of OJ there was a reduction of 5.7 mm (from 9 to 3.3 mm). It was concluded that the pre-surgical orthodontic treatment promoted minimal and variable dental and skeletal changes in the final result. The surgical treatment caused significant skeletal changes, especially in the measurements related to the mandible (SNB, BNP, PGNP and SNPM) or indirectly to it (ANB, AOBO and OJ).

  9. Mandibular distraction in neonates: indications, technique, results

    Sesenna Enrico

    2012-02-01

    Full Text Available Abstract Background The Pierre Robin Sequence features were first described by Robin in 1923 and include micrognathia, glossoptosis and respiratory distress with an incidence estimated as 1:8,500 to 1:20,000 newborns. Upper airway obstruction and feeding difficulties are the main concerns related to the pathology. Mandibular distraction should be considered a treatment option (when other treatments result inadequate. Patiants and methods Ten patients between the ages of 1 month and 2 years with severe micrognathia and airway obstruction were treated with Mandibular Distraction Osteogenesis (MDO. All patients underwent fibroscopic examination of the upper airway and a radiographic imaging and/or computed tomography scans to detect malformations and to confirm that the obstruction was caused by posterior tongue displacement. All patients were evaluated by a multidisciplinary team. Indications for surgery included frequent apneic episodes with severe desaturation (70%. Gavage therapy was employed in all patients since oral feeding was not possible. The two tracheotomy patients were 5 months and 2 years old respectively, and the distraction procedure was performed to remove the tracheotomy tube. All patients were treated with bilateral mandibular distraction: two cases with an external multivector distraction device, six cases with an internal non-resorbable device and two cases with an internal resorbable device. In one case, the patient with Goldenhar's Syndrome, the procedure was repeated. Results The resolution of symptoms was obtained in all patients, and, when present, tracheotomy was removed without complications. Of the two patients with pre-existing tracheotomies, in the younger patient (5 months old the tracheotomy was removed 7 days postoperatively. In the Goldenhar's syndrome case (2 years old a Montgomery device was necessary for 6 months due to the presence of tracheotomy-inducted tracheomalacia. Patients were discharged when the

  10. Mandibular molar with five root canals.

    Barletta, Fernando Branco; Dotto, Sidney Ricardo; Reis, Magda de Sousa; Ferreira, Ronise; Travassos, Rosana Maria Coelho

    2008-12-01

    The purpose of this study was to demonstrate the importance of knowledge of the internal anatomy of root canals for the success of endodontic treatment. Lack of knowledge of anatomic variations and their characteristics in different teeth has been pointed out as one of the main causes of endodontic therapy failure. In this report, the authors describe the endodontic treatment of a mandibular first molar with five root canals, evaluate the rate of occurrence of this number of canals, and discuss the importance of their identification and treatment.

  11. [Temporo-mandibular joints and orthognathic surgery].

    Bouletreau, P

    2016-09-01

    Temporo-Mandibular Joints (TMJ) and orthognathic surgery are closely linked. In the past, some authors have even described (with mixed results) the correction of some dysmorphosis through direct procedures on the TMJs. Nowadays, performing orthognathic surgery involves the TMJ in three different occasions: (1) TMJ disorders potentially responsible for dento-maxillary dysmorphosis, (2) effects of orthognathic surgery on TMJs, and (3) condylar positioning methods in orthognathic surgery. These three chapters are developed in order to focus on the close relationships between TMJ and orthognathic surgery. Some perspectives close this article. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  12. Renal cell carcinoma presenting as mandibular metastasis

    Hassan Ahmadnia

    2013-01-01

    Full Text Available Renal clear cell carcinoma (RCC has different manifestations, including uncommon metastasis and paraneoplastic syndromes. Here we report a rare case of RCC presenting as metastasis to the mandible. A 57-year-old patient with mandibular swelling was referred to the dentist. After necessary evaluations, an incisional biopsy of mandible showed metastatic RCC. The patient was referred to the urologist. The patient underwent right radical nephrectomy. Pathological examination showed clear renal cell carcinoma. Every abnormal bone lesion in the oral cavity should be evaluated carefully and the possibility of a malignant lesion should always be considered.

  13. Mandibular unilateral fusion in primary dentition

    Neena Eregowda

    2017-01-01

    Full Text Available Fusion is a developmental anomaly which occurs due to a union of one or more adjacent teeth during morphodifferentiation of the dental germs. The prevalence of tooth fusion is estimated at 0.5%–2.5% in the primary dentition. These anomalies may be unilateral or bilateral and may affect either dentition although the deciduous teeth are more commonly affected. Early diagnosis of such condition is important because it may cause clinical problems, such as esthetic concerns, and caries. This report describes a case of unilateral fusion of the primary mandibular lateral incisor and canine and aims to evaluate any associated pathology.

  14. Dimorfismo sexual mandibular en una coleccion formativa

    Barboza, María Carolina; Mendonça, Osvaldo Juan; Bordach, María A.

    2005-01-01

    Muchas piezas óseas permiten la estimación sexual. En la mandíbula es mediante la observación de sectores morfoestructurales (gonion, mentón, rama, etc). La efectividad discriminatoria de esta estructura puede verse incremententada y/o complementada con nuevas propuestas técnico-metodológicas. Una de estas propuestas (Loth y Henneberg 1996), basada en la conformación anatómica de la inflexión del borde posterior de la rama mandibular, ha sido cuestionada en su eficiencia diagnóstica. Puesto q...

  15. Prosthodontic management of mandibular deviation using palatal ramp appliance

    Prince Kumar

    2012-08-01

    Full Text Available Segmental resection of the mandible generally results in deviation of the mandible to the defective side. This loss of continuity of the mandible destroys the balance of the lower face and leads to decreased mandibular function by deviation of the residual segment toward the surgical site. Prosthetic methods advocated to reduce or eliminate mandibular deviation include intermaxillary fixation, removable mandibular guide flange, palatal ramp, implant-supported prosthesis and palatal guidance restorations which may be useful in reducing mandibular deviation and improving masticatory performance and efficiency. These methods and restorations would be combined with a well organized mandibular exercise regimen. This clinical report describes the rehabilitation following segmental mandibulectomy using palatal ramp prosthesis.

  16. Mandibular kinematics after orthognathic surgical treatment a pilot study.

    Sforza, Chiarella; Ugolini, Alessandro; Rocchetta, Davide; Galante, Domenico; Mapelli, Andrea; Giannì, Aldo Bruno

    2010-03-01

    We recorded three-dimensional mandibular movements, while the mouth was being opened and closed, using an optoelectronic motion analyser in 14 patients (5 skeletal Class II, 9 skeletal Class III) who were being assessed 7-49 months after orthognathic operations, and in 44 healthy subjects. All 14 patients had satisfactory healing on clinical examination, and function had been restored. Mandibular movement was divided into its rotational and translational components. On maximum mouth opening, the patients had significantly less total displacement of the mandibular interincisor point (p=0.05), and more mandibular movement that was explained by pure condylar rotation (p=0.006), than control subjects. There was no significant relation between maximum mouth opening and percentage rotation. While mandibular motion was well restored clinically by orthognathic surgery, the kinematics of the joint were modified. Larger studies and longitudinal investigations are necessary to appreciate the clinical relevance of the variations in condylar rotational and translational components.

  17. Mandibular condyle position in cone beam computed tomography

    Hwang, Hyoung Joo; Kim, Gyu Tae; Choi, Yong Suk; Hwang, Eui Hwan [Kyung Hee Univ. School of Dentistry, Seoul (Korea, Republic of)

    2006-06-15

    To evaluate position of the mandibular condyle within articular fossa in an asymptomatic population radiographically by a cone beam computed tomography. Cone beam computed tomography of 60 temporomandibular joints was performed on 15 males and 15 females with no history of any temporomandibular disorders, or any other orthodontic or photoconductors treatments. Position of mandibular condyle within articular fossa at centric occlusion was evaluated. A statistical evaluation was done using a SPSS. In the sagittal views, mandibular condyle within articular fossa was laterally located at central section. Mandibular condyles in the right and left sides were showed asymmetric positional relationship at medial, central, and lateral sections. Mandibular condyle within articular fossa in an asymptomatic population was observed non-concentric position in the sagittal and coronal views.

  18. Thin-plate spline analysis of mandibular growth.

    Franchi, L; Baccetti, T; McNamara, J A

    2001-04-01

    The analysis of mandibular growth changes around the pubertal spurt in humans has several important implications for the diagnosis and orthopedic correction of skeletal disharmonies. The purpose of this study was to evaluate mandibular shape and size growth changes around the pubertal spurt in a longitudinal sample of subjects with normal occlusion by means of an appropriate morphometric technique (thin-plate spline analysis). Ten mandibular landmarks were identified on lateral cephalograms of 29 subjects at 6 different developmental phases. The 6 phases corresponded to 6 different maturational stages in cervical vertebrae during accelerative and decelerative phases of the pubertal growth curve of the mandible. Differences in shape between average mandibular configurations at the 6 developmental stages were visualized by means of thin-plate spline analysis and subjected to permutation test. Centroid size was used as the measure of the geometric size of each mandibular specimen. Differences in size at the 6 developmental phases were tested statistically. The results of graphical analysis indicated a statistically significant change in mandibular shape only for the growth interval from stage 3 to stage 4 in cervical vertebral maturation. Significant increases in centroid size were found at all developmental phases, with evidence of a prepubertal minimum and of a pubertal maximum. The existence of a pubertal peak in human mandibular growth, therefore, is confirmed by thin-plate spline analysis. Significant morphological changes in the mandible during the growth interval from stage 3 to stage 4 in cervical vertebral maturation may be described as an upward-forward direction of condylar growth determining an overall "shrinkage" of the mandibular configuration along the measurement of total mandibular length. This biological mechanism is particularly efficient in compensating for major increments in mandibular size at the adolescent spurt.

  19. Fraturas proximais do fêmur em idosos: qual o melhor tratamento? Proximal fracture of the femur on the elderly: what's the best treatment?

    Lygia Paccini Lustosa

    2009-01-01

    Full Text Available As fraturas proximais do fêmur em idosos representam um sério problema dentro do contexto da saúde pública, devido aos elevados custos econômicos para o tratamento e as suas consequências, assim como pela alta taxa de morbidade e mortalidade. O objetivo desse estudo foi discutir quais os tratamentos mais indicados para esse tipo de fratura, em idosos, por meio de uma revisão da literatura. As bases de dados pesquisadas foram MEDLINE, COCHRANE e PEDro. Os critérios de inclusão foram estudos publicados nos últimos sete anos; nos idiomas português, inglês e espanhol; realizados em seres humanos, sem distinção de gênero e com idade maior que 60 anos; estudos com desenho metodológico de ensaios clínicos, ensaios clínicos aleatorizados e revisões sistemáticas com e sem meta-análise. Foram encontrados sete artigos e após a análise pode se afirmar que não existe um tratamento específico para as fraturas proximais do fêmur em idosos. O tratamento normalmente indicado na maioria dessas fraturas é cirúrgico e requer envolvimento fisioterápico para uma reabilitação adequada. Apesar da dificuldade de comparação entre os estudos, foi observado que uma equipe de profissionais da saúde parece promover uma reabilitação mais efetiva, além de prevenir complicações.The proximal fractures of the femur on the elderly represent a serious problem inside the public health context, because of the high economic costs needed for the treatment and it's consequence, as the high taxes of morbidity and mortality. The goal of this study was to discuss, through a literature revision, which is the most indicated treatment for the proximal fractures of the femur, on the elderly. The researched data bases were MEDLINE, COCHRANE and PEDro. The inclusion criterions were published studies on the last seven years, only on the Portuguese, English and Spanish languages, accomplished on human beings, with no genre distinction and with ages above 60

  20. Associação entre a morfologia de trincas de pisos cerâmicos e seu comportamento mecânico em fratura

    E. S. Fonseca

    2015-09-01

    Full Text Available ResumoEste trabalho analisou os dados obtidos a partir de ensaios a flexão em um lote de 40 corpos de provas de placas cerâmicos, preparados da mesma forma de acordo com a norma brasileira de ensaios NBR 13818:1997. Os dados de resistência à flexão obtidos nos testes, na forma de curvas tensão versus flexão, foram avaliados estatisticamente. Análises estatísticas detalhadas mostraram dois subgrupos diferentes de comportamento mecânico apresentado pelos corpos de prova cerâmicos testados. A análise fractográfica de amostras representativas destes dois grupos indicaram diferenças morfológicas relevantes nas fraturas obtidas destas amostras durante o ensaio. Essas diferenças puderam ser associadas com o comportamento mecânico apresentados pelas amostras analisadas.

  1. Mandibular canal branches supplying the mandibular third molar observed on cone beam computed tomographic images: Reports of four cases

    Lee, Jae Seo; Yoon, Suk Ja; Kang, Byung Cheol [Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju (Korea, Republic of)

    2009-12-15

    Bifid mandibular canal can be an anatomic variation. This condition can lead to complication when performing mandibular anesthesia or during extraction of lower third molar, placement of implants and surgery in the mandible. Four patients underwent preoperative imaging for extraction of third molars using CBCT (CB Mercuray, Hitachi, Japan). The axial images were processed with CBworks program 2.1 (CyberMed Inc., Seoul, Korea). The branches for supplying the lower third molar were identified mainly on cross-sectional and panoramic images of CBCT. Since the location and configuration of mandibular canal variations are important in any mandibular surgical procedures, we report 4 cases of bifid mandibular canal with panoramic and the CBCT images.

  2. Fractografia de compósito estrutural aeronáutico submetido ao ensaio de tenacidade à fratura interlaminar em Modo II

    Geraldo Maurício Cândido

    2014-01-01

    Full Text Available A fractografia consiste no estudo detalhado da morfologia da superfície de fratura de materiais. Para isto, a técnica de microscopia eletrônica de varredura (MEV é usualmente utilizada para determinar a causa de falha e a relação do modo de falha com a microestrutura do material em análise. Essas informações permitem estabelecer analogia entre estrutura, propriedade e processamento do material com a iniciação e a propagação da falha. Neste estudo, a análise fractográfica é utilizada para investigar os aspectos que caracterizaram a falha por delaminação em Modo II de laminados poliméricos de uso estrutural. Para isto, espécimes com um inserto de Teflon® introduzido no plano médio de uma das extremidades do laminado (End-Notched foram submetidos ao ensaio de carregamento em flexão em quatro pontos. Os espécimes foram preparados a partir de um laminado fabricado em autoclave, com camadas (0º, 90º de material pré-impregnado de tecido bidirecional em estilo plain weave de fibras de carbono IM7/resina epóxi M21. Os resultados da análise mostram que a superfície de fratura é muito irregular, com a visualização de fibras e impressões de fibras na matriz. Aspectos fractográficos de cúspides e formatos de concha, originados durante o cisalhamento da matriz polimérica, são também observados.

  3. Efeitos da dieta proteica na cicatrização de fraturas distais de fêmur imobilizadas com pinos intramedulares em cão

    Silveira Iandara Silva

    1997-01-01

    Full Text Available No presente experimento vinte cães sem raça definida, pesando em média 6kg, com idade variando entre 4 e 12 anos, vindos do Biotério Central da Universidade Federal de Santa Maria (UFSM, foram distribuidos em dois grupos com 10 animais, cada grupo dividido em dois subgrupos com 5 cães, denominados 1A, 1B, 2A e 2B. Os animais do grupo 1 receberam tratamento por 90 dias, e os do grupo 2 por 60 dias após a cirurgia. O subgrupo A correspondem a tratamento com ração crescimento contendo 27% de proteina bruta e o subgrupo B ração manutenção com 21% de proteina bruta. Todos os cães sofreram fratura distal de fêmur, experimental, reduzidas com dois pinos intramedulares, introduzidos através da superfície articular da tróclea. Os cães ficaram confinados em canis individuais até a remoção dos pontos e em canis comuns para no máximo 5 cães até o término do experimento. Foi feita avaliação clínica, radiográfica e histológica da evolução da cicatrização óssea a qual demonstrou que o tratamento com ração com maior teor de proteina proporcionou melhor regeneração e que a técnica de osteossíntese utilizada manteve estabilidade na linha de fratura.

  4. Fraturas vertebrais em grandes animais: estudo retrospectivo de 39 casos (1987-2002 Vertebral fractures in large animals: retrospective study of 39 cases (1987-2002

    A.S. Borges

    2003-04-01

    Full Text Available Realizou-se estudo retrospectivo (1987-2002 dos aspectos clínicos das fraturas vertebrais em eqüinos, bovinos, ovinos, caprinos e suínos atendidos no hospital veterinário da FMVZ-Unesp de Botucatu. Todos os casos tiveram confirmação radiográfica ou post-mortem. Segundo a espécie, a ordem de acometimento foi: bovina, eqüina, ovina, caprina e suína. As lesões ocorreram desde os 12 dias de idade até os 10 anos, com maior freqüência até os 12 meses. O segmento torácico foi o mais comprometido seguido dos segmentos lombar, cervical e sacral. As fraturas vertebrais devem fazer parte da lista de diagnósticos diferenciais de animais em decúbito, independente da espécie, sexo ou idade.It was performed a retrospective study (1987-2002 of clinical features of spinal fractures in the equine, bovine, ovine, caprine and swine referred to the Veterinary Hospital - FMVZ-Unesp in Botucatu, SP, Brazil. All the cases were confirmed by necropsy or radiographic evaluation. Bovines were the most affected species, followed by horses, sheep, goats and swines, and lesions occurred from 12 days to 10 years of age, being more frequent up to 12 months of age. Thoracic vertebrae were the most affected, followed by lumbar, cervical and sacral segments. Vertebral fractures should be included for differential diagnosis of recumbent animals, independently on species, sex or age.

  5. Dynamic MR imaging of mandibular osteoradionecrosis

    Store, G.; Smith, H.J.; Larheim, T.A.

    2000-01-01

    Osteoradionecrotic bone has been characterised as hypovascular and metabolically inactive tissue with impaired perfusion. The present study was conducted to determine if dynamic contrast-enhanced MR imaging could provide additional information about the vascularity of radionecrotic mandibular bone. Dynamic contrast-enhanced MR imaging was performed on 10 patients with mandibular osteoradionecrosis (ORN), and on 6 patients, irradiated for oropharyngeal tumours, without symptoms or signs of ORN. Nine patients in the ORN group received a series of 20 hyperbaric oxygen (HBO) treatments, after which the dynamic MR investigation was repeated. Radiation per se did not lead to increased contrast enhancement, whereas all patients with ORN showed marked contrast enhancement of the osteoradionecrotic bone marrow. After HBO treatment, pathological contrast enhancement of the abnormal bone marrow could still be seen, but the rate of enhancement was less than before in 7 of 9 patients. Two patients had an increase in the enhancement rate. The findings suggest the existence of an increased and patent microvasculature

  6. Pyogenic granuloma associated with mandibular odontoma.

    Karla Ocampo

    2014-08-01

    Full Text Available Background: pyogenic granuloma is a kind of inflammatory hyperplasia of multifactorial origin, which is usually related to trauma or constant irritation, drug use, hormonal factors, among others. Meanwhile the odontoma is a benign tumor odontogenic composed of epithelial and mesenchymal cells, their development is usually associated with trauma, infections, inherited disorders or hyperactivity odontoblast. Objectives: The objective is to present the clinical case of a patient that presented a case of pyogenic granuloma related to the presence of a mandibular odontoma, and therapeutic management and postoperative results. Case report: The case shows a female patient of 32 years old with a history of multinodular goiter and hypothyroidism, developing a mandibular odontoma of the left side associated with pyogenic granuloma in the same area, which was treated with surgical excision and reconstructed affected tissues with lyophilized bone and collagen membrane. Favorable outcome after surgery without evidence of recurrence, with proper osseointegration of alloplastic materials and soft tissues. Conclusions: The irritant effect of the presence of a tumor (odontoma in developing confirmed pyogenic granuloma.

  7. Transmigration of mandibular canine – case report

    Gruszka, Katarzyna; Różyło, T. Katarzyna; Różyło-Kalinowska, Ingrid; Denkiewicz, Katarzyna; Masłowska, Klaudia

    2014-01-01

    Transmigration is a phenomenon of movement of an unerupted tooth in the bone across the midline. This anomaly is not often found. Transmigration is more prevalent in females than in males, and more often encountered in the mandible than maxilla, it affects mostly canines. The aim of this study was to present a case report of a mandibular canine transmigration in a patient aged 12. Intraoral examination determined hypodontia of right second premolar and delayed eruption of left second premolar in maxilla, as well as persistent deciduous teeth: right second molar, left canine and second molar. The patient was referred for a Cone-Beam CT examination, which allowed precise visualization of the transmigrating canine as well as ruled out resorption of roots of mandibular incisors. The treatment with a maxillary fixed orthodontic appliance was finished after obtaining a satisfactory result. Proper alignment of the incisors in the anterior-posterior plane and correct midline position were accepted by the patient. Transmigrating canine after consultation with the surgeon was designed to further radiological observation

  8. Physiological responses in the banana plantlets treateds with strobilurinsRespostas fisiológicas em mudas de banananeira tratadas com estrobilurinas

    Sivia Helena Modenese-Gorla da Silva

    2012-04-01

    âmetro do pseudocaule e a massa da matéria seca da parte aérea de plantas tratadas com estrobilurinas foram superiores às de plantas não tratadas. O efeito do tratamento com fungicidas foi diferenciado, sendo mais pronunciado nas plantas tratadas com piraclostrobina do que nas plantas tratadas com azoxistrobina. Plantas tratadas com piraclostrobina apresentaram área foliar, atividade da redutase do nitrato e teor de clorofila a e de nitrogênio total foliar superiores às plantas tratadas com azoxistrobina e água, que não diferiram entre si. As estrobilurinas afetaram a fisiologia das mudas de bananeira, com destaque para a piraclostrobina.

  9. Fratura toracolombar tipo explosão: comparação do tratamento conservador em pacientes com e sem fratura do arco vertebral posterior Thoracolumbar burst fracture: comparing conservative treatment in patients with and without fracture of the posterior vertebral arch

    Osmar Avanzi

    2008-06-01

    Full Text Available OBJETIVO: Comparar clínica e radiologicamente os resultados a longo prazo do tratamento conservador da fratura explosão toracolombar, em pacientes com e sem fratura do arco vertebral posterior, com o propósito de avaliar eventuais diferenças na evolução destes dois tipos de lesão. MÉTODOS: Foram avaliados, retrospectivamente, os prontuários e exames de imagem (radiografias e tomografias computadorizadas de 25 pacientes sem déficit neurológico, com fratura toracolombar tipo explosão tratados não cirurgicamente e comparados o grau de progressão da cifose entre os casos com fratura da lâmina (grupo 1 e sem fratura posterior (grupo 2. Desses, 13 pacientes foram submetidos à avaliação comparativa por meio da escala visual analógica de dor (VAS, da escala de dor e trabalho de Denis e do questionário de qualidade de vida SF-36. RESULTADOS: Foram analisados 25 pacientes (36% do grupo A e 74% do grupo B com tempo médio de seguimento de 111,64 meses. Não houve diferença em relação ao grau de progressão da cifose durante o seguimento entre os grupos A e B (5,22º x 4,63º - p = 0,650. Dos 13 pacientes analisados funcionalmente, 46% eram do grupo A e 54% do grupo B. Nesta avaliação, apesar da VAS pior (1,83 x 5,00 - p = 0,015 nos pacientes sem fratura posterior (grupo B, não houve diferença em relação à escala de Denis (4,00 x 5,71 - p > 0,05 e SF-36 (98,60 x 90,83 - p = 0,168 entre os dois grupos. CONCLUSÃO: A fratura do arco posterior, isoladamente, parece não ser indicativo de instabilidade ou de mau prognóstico nas fraturas toracolombares tipo explosão.OBJECTIVE: To make a clinical and radiological comparison of long term results of the conservative treatment of thoracolumbar burst fractures, in patients with and without fracture in the posterior vertebral arch, in order to assess possible differences in the evolution of the two types of lesion. METHODS: A retrospective analysis was made of the clinical records and

  10. Radiologic study of mandibular third molar of Korean youths

    Ahn, Hyung Kyu

    1982-01-01

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

  11. Skeletal maturity assessment using mandibular canine calcification stages

    Vildana Džemidžić

    2016-11-01

    Full Text Available Objective. The aims of this study were: to investigate the relationship between mandibular canine calcification stages and skeletal maturity; and to evaluate whether the mandibular canine calcification stages may be used as a reliable diagnostic tool for skeletal maturity assessment. Materials and methods. This study included 151 subjects: 81 females and 70 males, with ages ranging from 9 to 16 years (mean age: 12.29±1.86 years. The inclusion criteria for subjects were as follows: age between 9 and 16 years; good general health without any hormonal, nutritional, growth or dental development problems. Subjects who were undergoing or had previously received orthodontic treatment were not included in this study. The calcification stages of the left permanent mandibular canine were assessed according to the method of Demirjian, on panoramic radiographs. Assessment of skeletal maturity was carried out using the cervical vertebral maturation index (CVMI, as proposed by the Hassel-Farman method, on lateral cephalograms. The correlation between the calcification stages of mandibular canine and skeletal maturity was estimated separately for male and female subjects. Results. Correlation coefficients between calcification stages of mandibular canine and skeletal maturity were 0.895 for male and 0.701 for female subjects. Conclusions. A significant correlation was found between the calcification stages of the mandibular canine and skeletal maturity. The calcification stages of the mandibular canine show a satisfactory diagnostic performance only for assessment of pre-pubertal growth phase.

  12. Mandibular fracture cases in Pelotas, Rio Grande do Sul, Brazil

    Rafael Silva da Silva

    2009-10-01

    Full Text Available Objectives: To analyze the data in the literature, which show a high incidence of mandibular fractures. The aim of this research was to elucidate the context in which these fractures occur among patients attended at the first aid center of “Pronto Socorro Municipal de Pelotas”, Rio Grande do Sul, Brazil. Methods: From the records referring to the period of June, 2001 to August, 2007, there were 1 345 patients with facial fractures. Of this total, 116 patients with mandibular fracture were selected for this study and the items analysed were: age, gender, mandibular fracture site, etiology and period of the year. Results: It was found that 86.2% of the sample were men. The most prevalent age was 20 to 29 years old representing 36.2%, and the most affected mandibular sites were the body, with 29 cases (25%, and the condyle, with 26 cases (22.4%. The most common cause of fractures was the physical aggression representing 37.1%. The period of the year with the highest incidence of mandibular fractures was the summer, with 38 cases (32.8%. Conclusion: It was therefore observed that the patients with mandibular fracture assisted at Pronto-Socorro Municipal de Pelotas, Rio Grande do Sul, Brazil, were generally men, 20 to 29 years old with mandibular body fracture and they were victims of physical aggression.

  13. Novo Parafuso (Acutrak® No tratamento cirúrgico de jogadores de futebol de elite com fraturas do quinto metatarso New screw (Acutrak® in the surgical treatment of elite football players with fifth metatarsal

    Hayati Ozturk

    2009-01-01

    Full Text Available OBJETIVO: Há uma variabilidade considerável na literatura no que tange ao tratamento ideal de fraturas do quinto metatarso. O objetivo deste estudo é apresentar os resultados da fixação cirúrgica de fraturas do quinto metatarso usando o parafuso Acutrak® em jogadores de futebol de elite. MATERIAL E MÉTODOS: Três casos de fratura do quinto metatarso em jogadores de futebol de elite são apresentados. A média de idade dos pacientes era de 24 anos (18-26 anos. Tratamos as três fraturas do quinto metatarso em jogadores de futebol de elite. Os casos em nosso estudo consistiam de uma fratura diafisiária do quinto metatarso e duas fraturas de Jones. As fraturas ocorreram durante a participação nos jogos. Aplicamos fixação interna utilizando um parafuso Acutrak® percutâneo sob anestesia local com o auxílio de um fluoroscópio. Os pacientes foram clinica e radiograficamente avaliados. RESULTADOS: O restabelecimento clínico foi obtido em 10 semanas após a cirurgia. A consolidação radiográfica ocorreu em 8 semanas de pós-operatório, sendo que os pacientes retornaram a seus níveis prévios de atividade em 11 semanas de pós-operatório. Não foi relatada nenhuma complicação pósoperatória. Não se observou nenhuma irritação de pele devido à ausência de cabeça do parafuso Acutrak®. CONCLUSÃO: Os resultados sugerem que Acutrak® pode ser usado em jogadores de futebol com fraturas do quinto metatarso. Apesar de fatores como facilidade de implante, o custo e a resistência a inclinação também devem ser considerados.OBJECTIVE: There is considerable variability in the literature concerning the optimal treatment of fifth metatarsal fracture. The purpose of this study is to report the outcome of surgical fixation of fifth metatarsal fractures using Acutrak® screw in elite football players. MATERIAL AND METHOD: Three cases of fifth metatarsal fracture in elite football players. The mean age was 24 years old (18-26 years. We

  14. Fratura supracondiliana do fêmur durante salto após reconstrução artroscópica do ligamento cruzado anterior Supracondylar emur fracture during jump after anterior cruciate ligament arthroscopic reconstruction

    Thiago Yukio Fukuda

    2009-04-01

    Full Text Available CONTEXTUALIZAÇÃO: A fratura distal do fêmur é uma das possíveis complicações no período pós-operatório de reconstrução de LCA, porém, de incidência rara. RELATO DE CASO: Descreve-se o caso de um atleta de 34 anos, gênero masculino, no quinto mês de pós-operatório de reconstrução de LCA. O caso evoluía normalmente de acordo com o protocolo estabelecido; o paciente apresentava bom controle e estabilidade sensoriomotora, quando sofreu fratura supracondiliana do fêmur ao realizar um salto durante atendimento fisioterápico. A reconstrução ligamentar foi realizada com enxerto dos músculos flexores do joelho e a fratura, ocasionada posteriormente, reduzida e fixada com placa e parafuso. Dez meses após a redução aberta e fixação interna da fratura, apresenta função regular na escala Lysholm, amplitude de movimento normal e força muscular grau V em flexores e extensores da coxa. DISCUSSÃO: Poucos relatos de caso semelhantes ao presente foram encontrados na literatura; a maioria apresentou fratura do fêmur após a reconstrução do LCA com tendão patelar. Este caso mostra-se relevante pela associação da fratura supracondiliana do fêmur com reconstrução ligamentar com tendões dos flexores, visto que apenas um trabalho seguiu tal direção. Dentre as prováveis causas dessa fratura, destacam-se uma fragilidade óssea por desuso e túnel ósseo femoral de diâmetro maior que o padrão, apesar de não haver consenso em relação a essas alterações. Uma hipótese sugerida pelos autores deste relato é de que o túnel ósseo de fixação do enxerto pode ter sido um intensificador de estresse sobre o local da fratura.BACKGROUND: Distal femoral fracture is one of the possible complications on the post operative period of the ACL reconstruction; however, with rare incidence. CASE REPORT: This study reports a male 34 year-old athlete, five months after ACL reconstruction surgery. The case developed normally in accordance

  15. Tratamento cirúrgico das fraturas dos metatársicos laterais com técnica percutânea anterógrada: descrição técnica e resultados clínicos

    Baumfeld,Daniel; Macedo,Benjamim Dutra; Nery,Caio; Esper,Leonardo Elias; Baldo Filho,Marco Aurelio

    2012-01-01

    OBJETIVO: O objetivo deste trabalho é avaliar os resultados obtidos com a técnica de fixação anterógrada percutânea para o tratamento das fraturas do colo e diáfise dos metatársicos laterais. MÉTODOS: Realizamos avaliação prospectiva de 14 pacientes operados no período de 2003 a 2008, em que foram levados em consideração a topografia das fraturas, o mecanismo de trauma, as comorbidades associadas e o escore AOFAS para o antepé. RESULTADOS: A região anatômica mais atingida foi o colo dos metat...

  16. Evolution of Brazilian elderly with hip fracture secondary to a fall Evolução de idosos brasileiros com fratura de colo de femur secundária à queda

    Rosamaria Garcia

    2006-01-01

    Full Text Available OBJECTIVE: To contribute to fall prevention by studying the epidemiological profile, mortality, and functional evolution of elderly persons with hip fracture, in Brazil, in the year following a fracture. METHOD: Fifty-six elderly patients aged 60 years and over with hip fracture secondary to a fall and admitted in 2000 were included. In addition to the medical record data, patients or their guardians filled a form providing information regarding personal data, history of fall and fracture, physical evaluation, and ability to perform basic and instrumental activities of daily living prior to and 1 year after their fracture, using Katz's Index and Lawton's Index, respectively. RESULTS: Fractures were more common among Caucasian widowed women, and most falls occurred at home. General mortality within 1 year after the occurrence of fracture was 30.35% and was associated with sex and age. There was an increase in the inability to walk and in the use of a supporting device. A significant reduction in the functional ability to perform basic and instrumental activities of daily living was found. CONCLUSION: The evolution of hip fracture in the year following it is related to high mortality and to a decrease in functional ability, with age and male sex being the factors associated with a worse prognosis, emphasizing the need for special follow-up care of these groups during the immediate and late postoperative periods.OBJETIVO: Estudar o perfil epidemiológico, mortalidade e a evolução funcional, no primeiro ano após a fratura, de idosos com fratura de quadril visando a contribuir para a prevenção de quedas. CASUÍSTICA E MÉTODO: Foram estudados 56 pacientes idosos, com 60 anos ou mais, com fratura de quadril decorrente de queda, internados em 2000. Alem dos dados de prontuário, os pacientes ou responsáveis responderam a um questionário, fornecendo informações sobre os dados pessoais, história da queda e da fratura, avaliação física e da

  17. [Congenital malformations of the temporo-mandibular joint and the mandibular ramus: Grafting vs distraction osteogenesis].

    Gallucci, A; Graillon, N; Foletti, J M; Chossegros, C; Cheynet, F

    2016-09-01

    Congenital deformities of the mandibular ramus and of the temporo-mandibular joint are treated by surgery since the early 20th century. However, morphological and functional results are often disappointing, accounting for iterative operations. Today, a clear consensus concerning the type of intervention to be proposed, and at what age it should be carried out does not yet exist. For mild cases, "conventional" orthognathic or osteogenic distraction procedures seem to work well, especially if they are carried out at the end of growth. In severe cases, it is often necessary to proceed in several surgical steps, usually starting with a chondrocostal graft, especially when interceptive surgery, performed before the end of growth, is preferred in order to improve the patient's quality of life. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  18. Topographical evaluation of the mandibular canal through panoramic radiograph

    Ingrid Macedo Oliveira

    2016-10-01

    Full Text Available The mandibular canal is located inside the body of the mandible and may have anatomical variations. The topographic knowledge of the mandibular canal by the Dental surgeons is fundamental to achieving success in surgical planning, anesthetics and clinical interventions involving the jaw. To study the anatomy of the mandibular canal through panoramic radiographs. A retrospective descriptive study, developed after review and approval by the Ethics and Research Committee with the number of opinion 431095. Were analyzed 252 panoramic radiographs of patients of male and female attended in dental clinics UNINOVAFAPI University Center, Teresina-Pi, Brazil. The radiographs were analyzed with the aid of a light box and each antimere the jaw was observed separately. The classification of Nortjé and Langlais for description of the topography of the mandibular canal were used. Descriptive statistical analysis was performed with SPSS version 18.0. There was a prevalence of 38.89% in both antimeres, of mandibular channel the Type II. The type IV was present in 25.4% in the right hemi-arch and 26.6% on the left. Mandibular canal with unilateral bifurcation was observed in 0.77% of the sample and molar straight channel has not been identified. We observed anatomical variations as for the number and path, of the mandibular canal with the highest prevalence of Types II and IV, and the absence of bifurcations. Most was mandibular channels showed no bifurcation. The panoramic radiograph showed up an aid important to identify the mandibular canal and its variations.

  19. Proximal mandibular nerve block using electrolocation in 10 dogs undergoing mandibular surgery: a case series report.

    Ravasio, Giuliano; D'Urso, Elisa Silvia; Macchioni, Chiara; Stefanello, Damiano

    2016-01-01

    Peripheral nerve block performed using electrical stimulation (i.e. electrolocation) is widely used for perioperative pain management during several surgical procedures in dogs (Campoy 2008), but few data are reported concerning its application to invasive maxillofacial surgery (Carotenuto et al 2011). The aim of this case series report is to evaluate the efficacy of proximal mandibular nerve block (PMNB) in perioperative pain management in dogs undergoing mandibulectomy. Ten dogs of various ...

  20. Complications and Reoperations in Mandibular Angle Fractures.

    Chen, Collin L; Zenga, Joseph; Patel, Ruchin; Branham, Gregory

    2018-05-01

    Mandible angle fractures can be repaired in a variety of ways, with no consensus on the outcomes of complications and reoperation rates. To analyze patient, injury, and surgical factors, including approach to the angle and plating technique, associated with postoperative complications, as well as the rate of reoperation with regard to mandible angle fractures. Retrospective cohort study analyzing the surgical outcomes of patients with mandible angle fractures between January 1, 2000, and December 31, 2015, who underwent open reduction and internal fixation. Patients were eligible if they were aged 18 years or older, had 3 or less mandible fractures with 1 involving the mandibular angle, and had adequate follow-up data. Patients with comminuted angle fractures, bilateral angle fractures, and multiple surgical approaches were excluded. A total of 135 patients were included in the study. All procedures were conducted at a single, large academic hospital located in an urban setting. Major complications and reoperation rates. Major complications included in this study were nonunion, malunion, severe malocclusion, severe infection, and exposed hardware. Of 135 patients 113 (83.7%) were men; median age was 29 years (range, 18-82 years). Eighty-seven patients (64.4%) underwent the transcervical approach and 48 patients (35.6%) received the transoral approach. Fifteen (17.2%) patients in the transcervical group and 9 (18.8%) patients in the transoral group experienced major complications (difference, 1%; 95% CI, -8% to 10%). Thirteen (14.9%) patients in the transcervical group and 8 (16.7%) patients in the transoral group underwent reoperations (difference, 2%; 95% CI, -13% to 17%). Active smoking had a significant effect on the rate of major complications (odds ratio, 4.04; 95% CI, 1.07 to 15.34; P = .04). During repair of noncomminuted mandibular angle fractures, both of the commonly used approaches-transcervical and transoral-can be used during treatment with equal

  1. Mandibular thickness measurements in young dentate adults.

    Beaty, Narlin B; Le, Thomas T

    2009-09-01

    To measure thicknesses in clinical landmark areas of the dentate mandibles of young men and women. Using standard radiologic software, we obtained mean (SD) thickness measurements at the inferior or posterior borders of the mandible at the following 7 surgically useful sites: (1) the symphysis, (2) a point halfway between the symphysis and the mental nerve, (3) the mental nerve, (4) a point halfway between the mental nerve and the facial artery notch, (5) the facial artery notch, (6) the angle vertex, and (7) the ramus-condylar neck border. University hospital. A total of 150 dentate men and 75 dentate women aged 18 to 30 years who had undergone computed tomography of the head and neck region during the period of December 20, 2006 to February 20, 2007. Thicknesses of 7 mandibular sites. Mean (SD) thicknesses at the 7 mandibular sites were as follows: symphysis, 14.03 (1.53) mm for men and 13.21 (1.46) mm for women; halfway between the symphysis and the mental nerve, 11.17 (1.37) mm for men and 10.00 (1.08) mm for women; mental nerve, 9.48 (1.28) mm for men and 8.72 (1.00) mm for women; halfway between the mental nerve and the facial artery notch, 10.33 (1.24) mm for men and 9.45 (0.92) mm for women; facial artery notch, 7.27 (0.82) mm for men and 7.10 (0.88) mm for women; angle vertex, 5.42 (0.90) mm for men and 5.39 (0.66) mm for women; and ramus-condylar neck border, 5.90 (0.86) mm for men and 5.85 (0.71) mm for women. Clinical landmark areas in young dentate mandibles have mean thicknesses with limited SDs. The thickness measurements obtained at the sites in this study provide practical reference information for mandibular reconstruction and bicortical screw length estimation.

  2. Peripheral Osteoma of the Mandibular Notch: Report of a Case

    Iwai, Toshinori; Izumi, Toshiharu; Baba, Junichi; Maegawa, Jiro; Mitsudo, Kenji; Tohnai, Iwai

    2013-01-01

    Osteoma is a benign, slow-growing osteogenic tumor that sometimes arises from the craniomaxillofacial region, such as the sinus, temporal or jaw bones. Osteoma consists of compact or cancellous bone that may be peripheral, central or extraskeletal type. Peripheral osteoma arises from the periosteum and is commonly a unilateral, pedunculated mushroom-like mass. Peripheral osteoma of the mandible is relatively uncommon, and peripheral osteoma of the mandibular notch is extremely rare, although many cases arise from the mandibular body, angle, condyle, or coronoid process. We report here an unusual peripheral osteoma of the mandibular notch in a 78-year-old nonsyndromic female

  3. Surgical Repair of an Olecranon Fracture in a Horse / Reparação Cirúrgica de Fratura de Olécrano em Eqüino

    Josmari Pirolo

    2010-04-01

    Full Text Available Olecranon fractures are frequently encountered in horses especially in foals. External trauma due to kicks or falls is the most common cause of the fracture. Treatment modalities of olecranon fractures including prolonged stall rest and surgical reconstruction of the different types of fractures have been proposed with different outcomes. This article describes a successful surgical reconstruction of an olecranon fracture in an adult horse repaired with a dynamic compression plate. The horse regained complete soundness and performed his job normally for additional 7 years. Information regarding the history, clinical signs, diagnosis, surgical treatment and long-term prognosis is discussed and compared with the current literature.As fraturas de olécrano ocorrem freqüentemente em eqüinos, especialmente em potros jovens. A causa mais comum da fratura relaciona-se ao trauma externo originado, principalmente, por coices ou quedas. Modalidades distintas de tratamento incluindo o repouso prolongado ou a reparação cirúrgica dos variados tipos de fratura têm sido executadas com diferentes resultados. Este trabalho tem por objetivo a descrição de um caso de fratura de olécrano em um eqüino adulto reparada cirurgicamente por meio de placa e parafusos ortopédicos. O animal apresentou recuperação plena da função locomotora desempenhando normalmente suas funções por mais 7 anos. Informações relativas ao histórico, sinais clínicos, diagnóstico, tratamento cirúrgico e prognóstico são discutidas e comparadas com a literatura.

  4. GESSO SINTÉTICO E PINOS TRANSCORTICAIS NA REDUÇÃO DE FRATURA DE TÍBIA EM UMA BEZERRA FIBERGLASS CAST AND TRANSCORTICAL PINS IN TIBIAL FRACTURE REDUCTION IN A CALF

    Edivaldo Aparecido Nunes Martins

    2001-02-01

    Full Text Available Relata-se um caso de fratura de tíbia em uma bezerra de sete meses de idade, 200kg de peso, apresentando fratura fechada, cominutiva em diáfise. A fixação externa foi preferida como método de imobilização óssea, utilizando-se pinos transcorticais e gesso sintético. Obteve-se eficiente imobilização da fratura, com rápida recuperação do animal, dispendendo-se pouco tempo para o pós-operatório (52 dias. A técnica demonstrou ser de fácil realização e passível de ser executada a campo.A case of tibial fracture in a 7-month-old calf is reported, with closed comminuted diaphysial fracture. It has been given preference to external fixation as means of fracture immobilization, and transcortical pins and fiberglass cast have been used. Effective immobilization of the fracture and fast recovering of the animal as well as less time consuming toward the postoperative have been obtained. This technique has showed feasible to be done in the field.

  5. Relationship between fracture of mandibular condyle and absence of unerupted mandibular third molar-a retrospective study.

    Rajan, Ritesh; Verma, Dinesh Kumar; Borle, R M; Yadav, Abhilasha

    2016-06-01

    The purpose of the present study was to find, if there exists, a co-relation between presence of unerupted mandibular third molar and fracture of mandibular condyle. A retrospective, multicenter study was done collecting the data of all mandibular condyle fractures treated from November 2006 till August 2015. Data was collected from the patient's records and radiographs for the following information: age, sex, etiology of fracture, presence and state of lower third molars, and associated fracture. The results were subjected to statistical analysis. Out of 180 patients of condylar fracture, unerupted third molars were present in 35 (19.44 %) cases compared to 145 (80.55 %) cases of condylar fracture where the unerupted third molars were not present. The difference was statistically significant (p fracture was seen in 4 (11.4 %) cases, bilateral condylar fracture associated with other mandibular fractures in 9 (25.7 %) cases, isolated unilateral condylar fracture in 0 (0.0 %) cases, and unilateral condylar fracture associated with other mandibular fractures in 17 (48.5 %) cases and condylar fracture associated with mid face fractures in 5 (14.2 %) cases. In the unerupted third molar absent group, isolated bilateral condylar fracture was seen in 5 (3.4 %) cases, bilateral condylar fracture associated with other mandibular fractures in 30 (20.6 %) cases, isolated unilateral condylar fracture in 24 (16.5 %) cases, unilateral condylar fracture associated with other mandibular fractures in 73 (50.34 %) cases, and condylar fracture associated with mid face fractures in 13(8.96 %) cases. The difference between the groups was statistically significant (p = 0.032). This study suggests that the fractures of mandibular condylar region have a significantly higher incidence in patients without an unerupted mandibular third molar.

  6. A case of a massive mandibular schwannoma

    Shishir Ram Shetty

    2011-01-01

    Full Text Available Schwannoma, a benign nerve sheath tumor is relatively rare in occurrence and even rarer in sites, such as jaw bones. There are only 45 reported cases of intraosseous schwannoma of the jaws reported in the literature. We report a rare case of mandibular schwannoma in a 50-year-old Indian male. The clinical features resembled that of a residual cyst, fibro-osseous lesion or an odontogenic tumor/cyst. Radiological differential diagnoses of ameloblastoma or odontogenic keratocyst was made based on the findings of the orthopantomogram. The lesion was examined histopathologically and a final diagnosis of schwannoma arising from the inferior alveolar nerve was made. The aim of this report is to add information to the existing sparse literature on intraosseous schwannomas of the jaw.

  7. Assessment of mandibular growth by skeletal scintigraphy

    Kaban, L.B.; Cisneros, G.J.; Heyman, S.; Treves, S.

    1982-01-01

    Accurate assessment of facial skeletal growth remains a major problem in craniomaxillofacial surgery. Current methods include: (1) comparisons of chronologic age with growth histories of the patient and the family, (2) hand-wrist radiographs compared with a standard, and (3) serial cephalometric radiographs. Uptake of technetium-99m methylene diphosphonate into bone is a reflection of current metabolic activity and blood flow. Therefore, scintigraphy with this radiopharmaceutical might serve as a good method of assessing skeletal growth. Thirty-four patients, ranging in age from 15 months to 22 years, who were undergoing skeletal scintigrams for acute pathologic conditions of the extremities, were used to develop standards of uptake based on age and skeletal maturation. The results indicate that skeletal scintigraphy may be useful in evaluation of mandibular growth

  8. Radiographic study of morphology of mandibular condyle

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

    1985-11-15

    Anatomical anomaly of temporo-mandibular joint and its dysfunction is becoming one of the important problem in dentistry because the number of these cases are increasing rapidly. Applying 'Lateral Transcranial Technic', 'Updegrave method' and 'Denar Accuard 100' to skull and adult with normal occlusion the author obtained following results: 1. Grewcock method combined with cephalos tat as one of 'Lateral Transcranial Technic' revealed clear picture but the image of condyle head was tend to incline downward. 2. Direction of central radiation in 'Updegrave method' should be 2 recommended inch upward from auditorial mearus. 3. For functional analysis and correct diagnosis 'Denar Accuard 100' should be highly recommended.

  9. 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.

  10. Mandibular reconstruction with composite microvascular tissue transfer

    Coleman, J.J. III; Wooden, W.A.

    1990-01-01

    Microvascular free tissue transfer has provided a variety of methods of restoring vascularized bone and soft tissue to difficult defects created by tumor resection and trauma. Over 7 years, 26 patients have undergone 28 free flaps for mandibular reconstruction, 15 for primary squamous cell carcinoma of the floor of the mouth or tongue, 7 for recurrent tumor, and 6 for other reasons [lymphangioma (1), infection (1), gunshot wound (1), and osteoradionecrosis (3)]. Primary reconstruction was performed in 19 cases and secondary in 9. All repairs were composite flaps including 12 scapula, 5 radial forearm, 3 fibula, 2 serratus, and 6 deep circumflex iliac artery. Mandibular defects included the symphysis alone (7), symphysis and body (5), symphysis-body-ramus condyle (2), body or ramus (13), and bilateral body (1). Fourteen patients had received prior radiotherapy to adjuvant or curative doses. Eight received postoperative radiotherapy. All patients had initially successful vascularized reconstruction by clinical examination (28) and positive radionuclide scan (22 of 22). Bony stability was achieved in 25 of 26 patients and oral continence in 24 of 26. One complete flap loss occurred at 14 days. Complications of some degree developed in 22 patients including partial skin necrosis (3), orocutaneous fistula (3), plate exposure (1), donor site infection (3), fracture of reconstruction (1), and fracture of the radius (1). Microvascular transfer of bone and soft tissue allows a reliable reconstruction--despite previous radiotherapy, infection, foreign body, or surgery--in almost every situation in which mandible and soft tissue are absent. Bony union, a healed wound, and reasonable function and appearance are likely despite early fistula, skin loss, or metal plate or bone exposure

  11. Mandibular reconstruction with composite microvascular tissue transfer

    Coleman, J.J. III; Wooden, W.A. (Emory Univ. School of Medicine, Atlanta, GA (USA))

    1990-10-01

    Microvascular free tissue transfer has provided a variety of methods of restoring vascularized bone and soft tissue to difficult defects created by tumor resection and trauma. Over 7 years, 26 patients have undergone 28 free flaps for mandibular reconstruction, 15 for primary squamous cell carcinoma of the floor of the mouth or tongue, 7 for recurrent tumor, and 6 for other reasons (lymphangioma (1), infection (1), gunshot wound (1), and osteoradionecrosis (3)). Primary reconstruction was performed in 19 cases and secondary in 9. All repairs were composite flaps including 12 scapula, 5 radial forearm, 3 fibula, 2 serratus, and 6 deep circumflex iliac artery. Mandibular defects included the symphysis alone (7), symphysis and body (5), symphysis-body-ramus condyle (2), body or ramus (13), and bilateral body (1). Fourteen patients had received prior radiotherapy to adjuvant or curative doses. Eight received postoperative radiotherapy. All patients had initially successful vascularized reconstruction by clinical examination (28) and positive radionuclide scan (22 of 22). Bony stability was achieved in 25 of 26 patients and oral continence in 24 of 26. One complete flap loss occurred at 14 days. Complications of some degree developed in 22 patients including partial skin necrosis (3), orocutaneous fistula (3), plate exposure (1), donor site infection (3), fracture of reconstruction (1), and fracture of the radius (1). Microvascular transfer of bone and soft tissue allows a reliable reconstruction--despite previous radiotherapy, infection, foreign body, or surgery--in almost every situation in which mandible and soft tissue are absent. Bony union, a healed wound, and reasonable function and appearance are likely despite early fistula, skin loss, or metal plate or bone exposure.

  12. Pediatric mandibular fractures treated by rigid internal fixation.

    Wong, G B

    1993-09-01

    Mandibular fractures in the pediatric patient population are relatively uncommon. These patients present with their own unique treatment requirements. Most fractures have been treated conservatively by dental splints. Closed reduction techniques with maxillomandibular fixation (MMF) in very young children can pose several concerns, including cooperation, compliance and adequate nutritional intake. Rigid internal fixation of unstable mandibular fractures using miniplates and screws circumvents the need for MMF and allows immediate jaw mobilization. At major pediatric trauma institutions, there has been an increasing trend toward the use of this treatment when open reduction is necessary. This article presents a report of a five-year-old child who presented with bilateral mandibular fractures and was treated by rigid internal fixation and immediate mandibular mobilization.

  13. 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...

  14. 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.

  15. Incomplete (bending) fractures of the mandibular condyle in children

    Ahrendt, D.; Swischuk, L.E.; Hayden, C.K. Jr.; Texas Univ., Galveston

    1984-01-01

    Incomplete, bending or bowing fractures of the mandibular condyle in children frequently go undetected. The reason is that the bending deformity often is subtle and passes for normal. This is especially true if the fractures are bilateral. (orig.)

  16. Diagnostic ability of panoramic radiography for mandibular fractures

    Lee, Ji Hyun; Jung, Yun Hoa; Cho Bong Hae; Hwang, Dae Seok

    2010-01-01

    The purpose of this study was to evaluate the diagnostic efficacy of panoramic radiographs for detection of mandibular fractures. The sample was comprised of 65 patients (55 fractured, 10 non-fractured) with 92 fracture sites confirmed by multi-detector computed tomography (CT). Panoramic radiographs were evaluated for mandibular fractures by six examiners; two oral and maxillofacial radiologists (observer A and B), two oral and maxillofacial surgeons (observer C and D), and two general dentists (observer E and F). Sensitivity of panoramic radiography for mandibular fractures was 95.7% in observer A and B, 93.5% in observer C and D and 80.4% in observer E and F. The lowest sensitivity was shown in symphyseal/parasymphyseal areas, followed by subcondylar/condylar regions. Panoramic radiography is adequate for detection of mandibular fractures. However, additional multidetector CT is recommended to ascertain some indecisive fractures of symphysis and condyle, and in complicated fractures.

  17. Diagnostic ability of panoramic radiography for mandibular fractures

    Lee, Ji Hyun; Jung, Yun Hoa; Cho Bong Hae; Hwang, Dae Seok [School of Dentistry, Pusan National University, Pusan (Korea, Republic of)

    2010-03-15

    The purpose of this study was to evaluate the diagnostic efficacy of panoramic radiographs for detection of mandibular fractures. The sample was comprised of 65 patients (55 fractured, 10 non-fractured) with 92 fracture sites confirmed by multi-detector computed tomography (CT). Panoramic radiographs were evaluated for mandibular fractures by six examiners; two oral and maxillofacial radiologists (observer A and B), two oral and maxillofacial surgeons (observer C and D), and two general dentists (observer E and F). Sensitivity of panoramic radiography for mandibular fractures was 95.7% in observer A and B, 93.5% in observer C and D and 80.4% in observer E and F. The lowest sensitivity was shown in symphyseal/parasymphyseal areas, followed by subcondylar/condylar regions. Panoramic radiography is adequate for detection of mandibular fractures. However, additional multidetector CT is recommended to ascertain some indecisive fractures of symphysis and condyle, and in complicated fractures.

  18. Intermaxillary Fixation Screw Morbidity in Treatment of Mandibular Fractures

    Florescu, Vlad-Andrei; Kofod, Thomas; Pinholt, Else Marie

    2016-01-01

    Purpose The aim of the present retrospective study was to investigate the morbidity of screws used for intermaxillary fixation (IMF) in the treatment of mandibular fractures. A review of the published data was also performed for a comparison of outcomes. Our hypothesis was that the use of screws...... for IMF of mandibular fractures would result in minimal morbidity. Materials and Methods Patients treated for mandibular fractures from 2007 to 2013, using screws for IMF, using the international diagnosis code for mandibular fracture, DS026, were anonymously selected (Department of Oral and Maxillofacial...... Surgery, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark). The fracture type, radiographic findings, treatment modality, screw type and number, and root damage were recorded. For the outcome comparison, a review of the published data regarding iatrogenic dental root damage caused...

  19. Mandibular molar crown-topography, a biological predisposing ...

    Mandibular molar crown-topography, a biological predisposing factor to development of caries – a post-mortem analysis of 2500 extracted lower permanent molars at the dental centre, University of Benin teaching hospital.

  20. Impacted Mandibular Third Molars: Review of Literature and a ...

    were screened, and 50 articles were included in the review. Causes of ... impaction rate is higher for third molars when compared with other teeth. The mandibular .... Hence, the surgical extraction of these impacted teeth has become the most ...

  1. Occlusal plane rotation: aesthetic enhancement in mandibular micrognathia.

    Rosen, H M

    1993-06-01

    Patients afflicted with extreme degrees of mandibular micrognathia typically have vertically deficient rami as well as sagittally deficient mandibular bodies. This results in deficient posterior facial height, an obtuse gonial angle, excessively steep occlusal and mandibular planes, and a compensatory increase in anterior facial height. The entire maxillomandibular complex is overrotated in a clockwise direction. Standard orthognathic surgical correction fails to address this rotational deformity. As a consequence, the achieved projection of the lower face is inadequate, posterior facial height is further reduced, and occlusal and mandibular planes remain steep. Eleven patients with severe mandibular micrognathia underwent a surgical correction involving occlusal plane rotation to its normal orientation relative to Frankfort horizontal. This was accomplished by Le Fort I osteotomy to shorten the anterior maxilla (creating open bites in seven patients and making preexisting open bites worse in four patients) and sagittal split ramus osteotomies to advance and rotate the mandibular body counterclockwise, thus closing the surgically produced open bite. Counterclockwise rotation of the mandible afforded significantly greater sagittal displacement at the B point (mean 17 mm) than at the first molar (mean 10 mm) and produced adequate degrees of projection of the lower face when accompanied by a modest sliding genioplasty (mean 6.9 mm). Total advancement at the pogonion was a mean of 25.2 mm. In addition, posterior facial height was preserved, and mandibular and occlusal planes were normalized to mean angles of 27 and 10 degrees, respectively. At follow-up, which ranged from 9 to 24 months with a mean of 14.1 months, the mean sagittal relapse at the B point was 1.9 mm. Although heretofore considered unstable and therefore not clinically accepted, maxillomandibular counterclockwise rotation to normalize the occlusal plane rotational deformity provides stable, aesthetically

  2. Unusal canal configuration in maxillary and mandibular second molars

    Ramachandran Ragunathan

    2016-01-01

    Full Text Available This clinical article describes three different case reports of maxillary and mandibular second molars with the unusual anatomy of single root with a single canal and their endodontic management. An unusual case of bilateralism is observed in the first two cases in the form of single-rooted second mandibular molars in both the quadrant of the same patient. The presence of maxillary second molar with single root and single canal in the third case is unusual.

  3. Algorithm of imaging modalities in cases of mandibular fractures

    Mihailova, H.

    2009-01-01

    Mandibular fracture is the most common bone fracture of maxillo-facial trauma. Up to now the main method for examination of the mandible is radiography. The aim of the issue is to present an algorithm of imaging modalities for investigation of patients in cases of mandibular trauma. It consists of series of X ray techniques and views of the facial skull named mandibulo-facial. This standardizes mandibulo-facial series includes exactly determined four projections done by conventional X ray techniques: posterior-anterior view of skull (PA or AP), oblique view of the left mandible; oblique view of the right mandible; occipito-mental view. Using these four planned radiograms is obligatory for each mandibular trauma. Panoramic X-ray is obligatory in cases of apparatus availability; this abolish only oblique views (left and right). Occipito-mental view of the skull gives anatomically better the coronoid process of the mandible, the zygoma complex, the orbital edges and maxillar sinus than Waters projection. So mandibulo-facial series of four planned radiograms is not only for diagnostic of mandibular fractures, but as a screening of mandibulo-facial trauma too. Thus using algorithm of imaging modalities in cases of mandibular fracture leads to optimization of diagnostic process in patients with mandibular trauma. (author)

  4. Radiographic Localization of the Mental Foramen and Mandibular Canal

    Farzaneh Afkhami

    2013-01-01

    Full Text Available Objective: Accurately localizing the mental foramen and mandibular canal is important when administering local anesthesia and performing surgery; therefore, knowing the normal range of the possible locations is essential. Our purpose was to assess the location of the mental foramen and mandibular canal in an Iranian population using panoramic radiography.Materials and Methods: Standard panoramic radiographies were performed. The positions of 100 mental foramens were evaluated. The distances from the center of the mental foramen to the superior and inferior borders of the mandible and to the apexes of the first and second premolar were measured. The distance of the mental foramens from the mandibular midline and the diameter of the mandibular canal in the mental foramen connection were also measured.Results: Among 100 mental foramens, 6% were positioned under the first premolar, 24% were between the first and second premolars, 67% were under the second premolar, and the remaining 3% were behind the second premolar. The mean distance from the mental foramen to the mandibular midline was 27.77±3.20 mm. The mean diameter of the mandibular canal in the mental foramen connection was 3.09±0.69mm.Conclusion: The mental foramen was near the second premolar and the inferior border of the mandible. This information can be used to perform safer mental nerve blocks in surgical interventions.

  5. Chincup treatment modifies the mandibular shape in children with prognathism.

    Alarcón, José Antonio; Bastir, Markus; Rosas, Antonio; Molero, Julia

    2011-07-01

    Although chincups are the preferred treatment for growing children with mandibular prognathism, the mechanism by which chincups improve this condition remains unclear. The aim of this study was to use geometric morphometrics to evaluate changes in the shape of the mandible of prognathic children treated with a chincup. Geometric morphometrics were used to evaluate the short-term mandibular shape changes in 50 prognathic children treated with chincups compared with 40 untreated matched controls. Twenty-one 2-dimensional mandibular landmarks from cephalograms taken before and after 36 months of treatment or observation were analyzed by Procrustes superimposition and thin plate spline. Permutation tests of the treated patients showed highly significant differences in the mandibular shapes before and after treatment, and compared with the control group after the observation period. The thin plate spline grid deformations indicated more rectangular mandibular configuration, forward condyle orientation, condyle neck compression, gonial area compression, and symphysis narrowing. Early chincup treatment widely modifies the mandibular shape of prognathic children to improve Class III malocclusion. Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.

  6. Evaluation of mandibular morphology in different facial types

    Rajat Mangla

    2011-01-01

    Full Text Available The purpose of this study was to evaluate mandibular morphology in different facial types using various parameters. This study was conducted on lateral cephalograms of a total of 110 subjects, which included 55 males and 55 females between the age of 18-25 years having a mean of 22.3 years for males and 21.5 years for females. The sample was divided into normodivergent, hypodivergent, and hyperdivergent subgroups based on Jarabak′s ratio. Symphysis height, depth, ratio (height/depth and angle, antegonial notch depth, ramal height and width, mandibular depth, upper, lower, and total gonial angle, and mandibular arc angle were analyzed statistically and graphically. It was found that the mandible with the vertical growth pattern was associated with a symphysis with large height, small depth, large ratio, small angle, decreased ramus height and width, smaller mandibular depth, increased gonial angle, and decreased mandibular arc angle in contrast to mandible with a horizontal growth pattern. Sexual dichotomy was found with mean symphysis height and depth in the female sample being smaller than in the male sample, but symphysis ratio was larger in the female sample; males having greater ramus height and width, mandibular depth than females. The mandible seemed to have retained its infantile characteristics with all its processes underdeveloped in hyperdivergent group.

  7. Relationship between cervical vertebral maturation and mandibular growth.

    Ball, Gina; Woodside, Donald; Tompson, Bryan; Hunter, W Stuart; Posluns, James

    2011-05-01

    The cervical vertebrae have been proposed as a method of determining biologic maturity. The purposes of this study were to establish a pattern of mandibular growth and to relate this pattern to the stages of cervical vertebral maturation. Cephalometric radiographs, taken annually from ages 9 to 18 years, were evaluated for 90 boys from the Burlington Growth Center, Toronto, Ontario, Canada. Mandibular lengths were measured from articulare to gnathion, and incremental growth was determined. Cervical vertebral maturation stages were assessed by using a 6-stage method. Advanced, average, and delayed maturation groups were established. The prepubertal mandibular growth minimum velocity occurred during cervical stages 1 through 4 (P = 0.7327). Peak mandibular growth velocity occurred most frequently during stage 4 in all 3 maturation groups, with a statistical difference in the average and delayed groups (P cervical stages 1 through 6 does not occur annually; time spent in each stage varies depending on the stage and the maturation group. Cervical vertebral maturation stages cannot accurately identify the mandibular prepubertal growth minimum and therefore cannot predict the onset of the peak in mandibular growth. The cervical vertebral maturation stages should be used with other methods of biologic maturity assessment when considering both dentofacial orthopedic treatment and orthognathic surgery. Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.

  8. Influence of root embedment material and periodontal ligament simulation on fracture resistance tests Influência do material de inclusão e da simulação do ligamento periodontal nos ensaios de resistência à fratura

    Carlos José Soares

    2005-03-01

    Full Text Available The aim of this study was to evaluate the influence of the embedment material and periodontal ligament simulation on fracture resistance of bovine teeth. Eighty bovine incisor teeth were randomized into 8 groups (n = 10, embedded in acrylic or polystyrene resin using 4 types of periodontal ligament simulation: 1 - absence of the ligament; 2 - polyether impression material; 3 - polysulfide impression material; 4 - polyurethane elastomeric material. The specimens were stored at 37°C and 100% humidity for 24 hours. Specimens were submitted to tangential load on the palatal surface at 0.5 mm/minute crosshead speed until fracture. The fracture modes were analyzed as follows: 1 - coronal fracture; 2 - cemento-enamel junction fracture; 3 - partial root fracture; 4 - total root fracture. Statistical analyses by two-way ANOVA and Tukey's test were applied (p O objetivo deste estudo foi avaliar a influência do material de inclusão e da simulação de ligamento periodontal na resistência à fratura de dentes bovinos. Oitenta incisivos bovinos foram divididos em 8 grupos (n = 10 e, então, incluídos em cilindros com dois materiais, resina acrílica ou resina de poliestireno, usando-se quatro tipos de simulação do ligamento periodontal: 1 - ausência do ligamento; 2 - material de moldagem à base de poliéter; 3 - material de moldagem à base de polissulfeto; e 4 - material elastomérico à base de poliuretano. As amostras foram armazenadas em 100% de umidade a 37°C por 24 horas e então submetidas a carregamento tangencial na superfície palatina com velocidade de 0,5 mm/minuto até a fratura. Os padrões de fratura foram analisados de acordo com: 1 - fraturas coronais; 2 - fratura da junção esmalte-cemento; 3 - fratura parcial da raiz; 4 - fratura radicular total. A análise estatística empregou análise de variância fatorial e teste de Tukey (p < 0,05. Os resultados mostram que o método de inclusão e a simulação do ligamento periodontal

  9. Evaluation of the relationship between mandibular third molar and mandibular canal by different algorithms of cone-beam computed tomography.

    Mehdizadeh, Mojdeh; Ahmadi, Navid; Jamshidi, Mahsa

    2014-11-01

    Exact location of the inferior alveolar nerve (IAN) bundle is very important. The aim of this study is to evaluate the relationship between the mandibular third molar and the mandibular canal by cone-beam computed tomography. This was a cross-sectional study with convenience sampling. 94 mandibular CBCTs performed with CSANEX 3D machine (Soredex, Finland) and 3D system chosen. Vertical and horizontal relationship between the mandibular canal and the third molar depicted by 3D, panoramic reformat view of CBCT and cross-sectional view. Cross-sectional view was our gold standard and other view evaluated by it. There were significant differences between the vertical and horizontal relation of nerve and tooth in all views (p < 0.001). The results showed differences in the position of the inferior alveolar nerve with different views of CBCT, so CBCT images are not quite reliable and have possibility of error.

  10. Demência como fator de risco para fraturas graves em idosos Dementia as risk factor for severe bone fractures among the elderly

    Aline de Mesquita Carvalho

    2002-08-01

    Full Text Available INTRODUÇÃO: As quedas entre pessoas idosas constituem importante problema de saúde pública devido à sua alta incidência, às complicações para a saúde e aos altos custos assistenciais. O estudo realizado visa a estimar a associação entre demência e ocorrência de quedas e fraturas entre idosos. MÉTODOS: Foi conduzido estudo caso-controle de 404 indivíduos com 60 ou mais anos de idade, da cidade do Rio de Janeiro, Brasil. Casos e controles foram pareados por idade, sexo e hospital. Os dados foram coletados por meio de entrevista estruturada com os idosos. Foram considerados portadores de quadro demencial idosos cuja pontuação no questionário BOAS fosse superior a dois. Foram obtidos odds ratios (OR ajustados por fatores potenciais de confusão, utilizando-se regressão logística condicional. RESULTADOS: As quedas distribuíram-se igualmente entre os períodos da manhã, tarde e noite, havendo uma redução em sua freqüência durante a madrugada. Acidentaram-se dentro de casa 78% dos idosos com demência, contra 55% daqueles sem essa doença. O OR não-ajustado para a associação entre demência e fratura grave foi de 2,0 (IC95%, 1,23-3,25. Após o ajuste por fatores de confusão, houve uma pequena redução dessa associação (OR=1,82, 1,03-3,23. CONCLUSÃO: Idosos com quadro demencial apresentam maior risco de caírem e ser hospitalizados por fratura do que idosos sem demência. Tal fato implica a necessidade de cuidados especiais com esses indivíduos, visando a minimizar o risco desses acidentes.INTRODUCTION: Falls among elderly represent an important public health concern due to its high incidence, health implications, and medical care costs. The study aims to assess the association between dementia and bone fracture risk after falls among the elderly. METHODS: A case-control of 404 subjects aged 60 years old or more living in Rio de Janeiro, Brazil, was carried out. Cases and controls were matched by age, sex, and

  11. Osteossíntese com parafuso intramedular nas fraturas proximais do quinto metatarsiano do atleta Intramedullary screw fixation of proximal fifth metatarsal fractures in athletes

    Marta Maria Teixeira de Oliveira Massada

    2012-01-01

    Full Text Available OBJETIVO: Avaliar os resultados clínicos e radiológicos da osteossíntese com parafuso de compressão intramedular nas fraturas proximais do quinto metatarsiano no atleta. MÉTODOS: Foram incluídos no estudo 11 homens e seis mulheres com diagnóstico de fratura das zonas II e III do quinto metatarsiano. Quinze dos pacientes praticavam esporte a nível profissional ou de alto rendimento (futebol: n=11; basquetebol: n=1; atletismo: n=3 e dois praticavam atividade esportiva regular a nível recreacional. Foram submetidos a fixação cirúrgica com parafuso canulado de compressão (4.5mm de diâmetro. Todos os pacientes foram avaliados clinicamente e através da revisão do processo clínico e dos estudos imagiológicos. O tempo médio de seguimento após a cirurgia foi 54 meses (38-70. RESULTADOS: O tempo médio de consolidação (como demonstrado pelo estudo radiológico e de retorno à atividade esportiva foi 7.3 e 7.5 semanas, respectivamente. Todos os atletas retornaram aos níveis de atividade prévios. Não verificamos atrasos de consolidação, não-união ou refraturas à data do estudo. CONCLUSÃO: A osteossíntese com parafuso de compressão intramedular nas fraturas proximais do quinto metatarsiano demonstrou, nos nossos pacientes, ser um procedimento eficaz com taxas de morbilidade muito reduzidas e que permite ao atleta um retorno precoce à atividade esportiva. Nível de evidência I, Série de Casos.OBJECTIVE: The purpose of this study was to review the short- and long-term clinical and radiological results of intramedullary compression screw fixation of proximal fifth metatarsal fractures in athletes. METHODS: Eleven male and six female active patients with fifth metatarsal zone II and zone III fractures fixed with a 4.5-mm cannulated compression screw were evaluated by chart review, review of radiographs, and clinical evaluation. Fifteen of the patients were high-level athletes (soccer: n=11; basketball: n=1; track and field: n

  12. Lifestyle changes after osteoporotic fractures in elderly women Mudanças dos hábitos de vida após fratura por osteoporose em mulheres idosas

    Marcelo Medeiros Pinheiro

    2003-10-01

    Full Text Available OBJECTIVE: health promotion and disease prevention activities directed to osteoporosis might help to reduce the rate of osteoporotic fractures among elderly people. METHODS: in order to check whether osteoporotic women modify their habits after the fracture, 518 postmenopausal white Brazilian elderly women were recruited from the outpatient clinic of the Rheumatology Division (122 of them with fracture and were followed for one year. Questionnaire of evaluation was based on the European Vertebral Osteoporosis Study (EVOS and inquiries about topics related to falls, bone mass and fracture. Lateral thoracic and lumbar radiographs were taken according to a standard protocol in order to verify vertebral fracture. Bone mineral density was measured using a bone densitometer (Lunar DPX, Madison, WI. Women's behavior was analyzed before and after the fracture. RESULTS: before the fracture, 34% of them had poor health perception, 40.2% walked at least half an hour per day, 14.7% used canes, 56.6% complained of dizziness, 59.6% scattered rugs, 78.9% used public transportation, 21.1% used car, and 36.8% wore leather instead of rubber sole. After the fracture, 66.4% of those women had worse health perception; 69.7% became more sedentary, 27.9% used more canes, 63.4% complained of more dizziness, 38.3% removed rugs, 68.1% changed from public to private car transportation, and 55.7% modified their shoes from leather to rubber sole. Risk factors related to bone mass did not change before and after the fractures. CONCLUSIONS: these findings suggested that women modify only lifestyle habits related to falls but not those related to bone mass after osteoporotic fracture. Further research is needed in order to check which intervention strategies may lead to better results in preventing osteoporotic fractures.OBJETIVO: atividades de promoção de saúde e prevenção direcionadas para osteoporose podem ajudar a reduzir a taxa de fraturas osteoporóticas na popula

  13. Prevalência de osteoporose e fraturas vertebrais em mulheres na pós-menopausa atendidas em serviços de referência Prevalence of osteoporosis and vertebral fractures in postmenopausal women attending reference centers

    Francisco Bandeira

    2007-03-01

    Full Text Available Este estudo tem por objetivo verificar a prevalência de osteoporose e a presença de fraturas vertebrais em mulheres na pós-menopausa. Foram estudadas, em serviços de referências, 627 mulheres com idade acima de 50 anos, com média de idade de 63,9 ± 8,3 anos, tempo de menopausa de 16,2 ± 8,6 anos, e índice de massa corpórea de 26,6 ± 4.3 Kg/m2. A prevalência de osteoporose foi de 28,8% na coluna lombar e de 18,8% no colo do fêmur. Esta foi maior nas pacientes que apresentaram história de fraturas quando jovens. Na faixa entre 60 a 69 anos, 33,2% tinham osteoporose na coluna lombar e entre 70 e 79 anos, 38,2%. Das pacientes com mais de 80 anos 54,5% apresentam osteoporose na coluna lombar e 72,7% no colo do fêmur. Trinta e sete por cento tinham fraturas, sendo que 9% apresentam fraturas grau I, e 10,9% fraturas severas. Considerando-se os diversos grupos etários, a prevalência de fraturas vertebrais foi de 20% entre 50 e 59 anos, 25,6% entre 60 e 69 anos, 58,3% entre 70 e 79 anos, e 81,8% entre 80 e 89 anos. Em mulheres na pós-menopausa, a maioria sem sintomas clínicos, verificamos uma alta taxa de prevalência de osteoporose, e fraturas vertebrais.The aim of this study was to determine the prevalence of osteoporosis and vertebral fractures in postmenopausal women. We studied 627 women, aged 50 years and over in reference centers (mean age 63.9±8.3 years, 16.2 ± 8.6 mean years since menopause, and mean body mass index 26.6 ± 4.3 Kg/m2. The prevalence of osteoporosis was 28.8% for lumbar spine and 18.8% for femoral neck. The prevalence was higher in patients who had had a fracture during youth. In the 60-69 year-old group, 32.2% had lumbar spine osteoporosis and 17.4% femoral neck osteoporosis. In the 70-79 year-old group, 38.2% had lumbar spine osteoporosis and 34% femoral neck osteoporosis. In the 80 years and over age group, 54.5% had lumbar spine osteoporosis and 72.7% femoral neck osteoporosis. Thirty-seven percent had

  14. Análise de fraturas diafisárias do fêmur em crianças menores de 3 anos de idade Femoral shaft fractures: an assessment in children younger than 3 years old

    João Paulo Machado Bergamaschi

    2007-01-01

    Full Text Available Este estudo consiste na reavaliação ortopédica e psicossocial de crianças que sofreram fratura do fêmur até a idade dos três anos e objetiva a análise de suas causas prováveis e detecção de indícios de ocorrência de Síndrome de Maus Tratos. Trinta e cinco crianças menores de três anos de idade sofreram fratura diafisária de fêmur e foram atendidas no Pronto Socorro do Serviço de Ortopedia e Traumatologia da Santa Casa de São Paulo, no período de janeiro de 1996 a agosto de 2002, sendo que 18 compareceram para reavaliação. Como causa relatada das fraturas observamos: queda em 13 (72,2% casos, queda de objetos sobre o membro em três (16,7% e fratura no parto em dois (11,1%. Constatamos suspeita de Síndrome dos Maus Tratos em nove (maus tratos físicos em seis [33,3%] e negligência em três [16,7%] casos, fratura patológica em quatro (22,2%, causa acidental em três (16,7%, e outras causas em dois (11,1% casos. Maus tratos constituem uma importante causa a ser investigada nos casos de fratura do fêmur em crianças com menos de três anos de idade, sendo o provável mecanismo responsável por metade das fraturas aqui estudadas.This study consists of an orthopaedic and psychosocial re-evaluation of children who experienced femur fractures as young as 3 years old and aims to analyze potential causes and detect Child Abuse rates. Thirty-five children under the age of three years who experienced femoral shaft fractures received care at the Emergency Department of the Orthopaedics and Traumatology Service of Santa Casa de São Paulo within the period ranging from January, 1996 to August, 2002. Eighteen patients returned to the hospital for re-evaluation. The reported causes for fractures were: fall in 13 cases (72.2%, object fall on the limb in 2 cases (11.1%. Child abuse was suspected in 9 cases (physical abuse in 6 cases (33.3%, negligence in 3 cases (16.7%, pathological fracture in 4 cases (22.2%, accidental causes in 3

  15. Cirugía de torus mandibular

    Manuel Ramon Osorio Castillo

    2014-06-01

    Full Text Available ResumenLos huesos maxilares no son ajenos a las patologías que se pueden presentar en el sistema esquelético. Algunas de esas condiciones y patologías son singulares por sus características clínicas, su distribución y prevalencia. Los torus palatinos, los torus mandibulares (TM y las exostosis de los maxilares son un claro ejemplo de ellos. Hasta la presente existen ideas especulativas acerca de su etiopatogenia, de los factores asociados, de su incidencia y prevalencia, de su necesidad de tratamiento, lo que puede crear confusión entre los clínicos tanto en diagnóstico como en el manejo.El torus como tumor óseo benigno puede localizarse en el maxilar a nivel del paladar, o en la mandíbula a nivel de las tablas internas; o puede aparecer en cualquier parte del esqueleto. El TM es una exostosis o crecimiento óseo en la superficie lingual de la mandíbula. Este crecimiento ocurre generalmente cerca de la línea milohioidea, opuesto a los premolares, pero se puede extender del canino al primer molar. La mucosa que los recubre tiende a ser fina y no tolera por lo general las fuerzas de las prótesis que se colocan encima de ellos. La incidencia del torus de la mandíbula es baja en el 6% a 12.5% entre caucásicos y en los habitantes de la llanura africana. De manera contraria, algunos autores reportan una prevalencia mucho más elevada en la Costa Atlántica Colombiana.Se presenta el caso de un paciente con torus mandibulares bilaterales, con muchos años de crecimiento, hasta que por situaciones tanto fonéticas como de ulceraciones repetitivas decidió someterse al acto quirúrgico de forma bilateral. Se presentan algunas consideraciones para el manejo de esta. (Duazary 2008; 111-114AbstractThe jawbone is not a strange to the pathologies that can occur in the skeletal system. Some of these terms and conditions are unique for their clinical features, distribution and prevalence. The torus palate, jawbone torus (TM in spanish and

  16. A patient with mandibular deviation and 3 mandibular incisors treated with asymmetrically bent improved superelastic nickel-titanium alloy wires.

    Ikeda, Yuhei; Kokai, Satoshi; Ono, Takashi

    2018-01-01

    Skeletal and dental discrepancies cause asymmetric malocclusions in orthodontic patients. It is difficult to achieve adequate functional occlusion and guidance in patients with congenital absence of a mandibular incisor due to the tooth-size discrepancy. Here, we describe the orthodontic treatment of a 22-year-old woman with an asymmetric Angle Class II malocclusion, mandibular deviation to the left, and 3 mandibular incisors. The anterior teeth and maxillary canines were crowded. We used an improved superelastic nickel-titanium alloy wire (Tomy International, Tokyo, Japan) to compensate for the asymmetric mandibular arch and an asymmetrically bent archwire to move the maxillary molars distally. A skeletal anchorage system provided traction for intermaxillary elastics, and extractions were not needed. We alleviated the crowding and created an ideal occlusion with proper overjet, overbite, and anterior guidance with Class I canine and molar relationships. This method of treatment with an asymmetrically bent nickel-titanium alloy wire provided proper Class I occlusion and anterior guidance despite the mandibular deviation to the left and 3 mandibular incisors, without the need for extractions. Copyright © 2017 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  17. Conseqüências no crescimento de maxila e mandíbula de defeito ósseo cirúrgico no ramo da mandíbula de ratos Consequences on the growth of maxilla and mandible of surgical bone defect on mandibular ramus of rats

    Lucimar Rodrigues

    2004-10-01

    Full Text Available OBJETIVO: Analisar as conseqüências no crescimento de maxila e mandíbula de defeito ósseo cirúrgico simulando fratura no ramo da mandíbula. MÉTODOS: Foram utilizados 25 ratos Wistar com um mês de idade. Sob anestesia geral e por meio de incisão submandibular. Foi realizada osteotomia vertical no ramo da mandíbula do lado direito com emprego de motor cirúrgico. Após período de dois meses os animais foram sacrificados, os tecidos moles retirados e as hemimandíbulas desarticuladas. Foram realizadas incidências radiográficas axiais para o crânio e laterais para as hemimandíbulas. A seguir, por intermédio de um sistema de computador foram obtidas medidas lineares da maxila e das hemimandíbulas. Foi empregado o teste "t" de Student para verificação da significância da diferença entre os lados experimental e controle. RESULTADOS: A diferença foi significante para a altura do ramo (p=0,010 e comprimento da mandíbula referente ao côndilo (p=0,015 e ao ângulo (pPURPOSE: To analyse the consequences on the growth of maxilla and mandible of a surgical bone defect that simulates a mandibular ramus fracture. METHODS: A group of 25 one-month-old Wistar rats were used in this study. Under general anesthesia, and through a submandibular incision, a vertical osteotomy on the right side of the mandibular ramus was made using a surgical drill. The animals were sacrificed after two months, soft tissues removed, and the mandible disarticulated. The skull was submitted to axial radiograph and the hemimandibles to a lateral radiograph. With these, cephalometric mensurations were made through a computer system, and the obtained values submitted to Student's t-test. RESULTS: The height of the mandibular ramus presented significant difference (p=0,010 as well as the length of mandible, both to the condyle (P=0,015 and the angle (p=0,001. There was no significant difference to the mensurations of the maxilla. CONCLUSION: The consequences of the

  18. Avaliação da qualidade de vida em pacientes com fratura da tíbia Assessment of quality of life in patients with tibia fractures

    Oswaldo Roberto Nascimento

    2009-01-01

    Full Text Available OBJETIVO: Avaliar o impacto da fratura na qualidade de vida dos pacientes. MÉTODO: Os pacientes foram submetidos a um protocolo de dados clínicos e epidemiológicos, a uma avaliação específica para fraturas da tíbia, o método de Johner e Wruhs, cujo dados foram analisados por um questionário genérico para avaliação da qualidade de vida, o SF-36, o qual foi aplicado pelos autores, com um mínimo de seis meses de pós-operatório. Estes instrumentos foram também estratificados com relação ao retorno ou não dos pacientes a todas as atividades que realizavam antes do acidente. RESULTADOS: Observou-se uma diminuição dos valores de avaliação do questionário SF-36 demonstrada estatisticamente (pOBJECTIVE: To evaluate the impact of tibial fractures on patient's quality of life. METHOD: All patients were evaluated by means of a protocol of clinical and epidemiological data. The Johner and Wruhs method was employed to evaluate tibial fractures and the results were compared to those of the SF-36 Health Survey, which was applied by the authors from the sixth month postoperatively. Those methods were applied considering the return of the patients or not to all the activities they used to perform before the accident. RESULTS: We found a statistical significance (p<0.05 showed by Mann- Whitney's U-test between the component of SF-36, and return or not to previous activities. Regarding the results of SF36 and clinical evaluation (Johner and Wruhs, on the Kruskal-Wallis' test, we also found significant correlation. CONCLUSION: According to the established criteria and based on the results, tibial fractures, even with favorable clinical outcomes, result in a diminished quality of life.

  19. Penetration of flomoxef into human maxillary and mandibular bones.

    Igawa, H H; Sugihara, T; Yoshida, T; Kawashima, K; Ohura, T

    1995-09-01

    Penetration of flomoxef into the maxillary and mandibular bones was assayed clinically to provide data about its usefulness for the prevention of postoperative infection after maxillofacial surgery. Twenty-one patients undergoing maxillofacial surgery at our department were given flomoxef 2 g dissolved in 20 ml of physiological saline intravenously over 3 minutes during operation, and the serum, maxillary and mandibular concentrations were measured 1, 3, and 6 hours after injection by the band culture method using Escherichia coli 7437 as the indicator strain. The mean concentrations were 53.4, 16.1, and 2.6 micrograms/ml, respectively, in the serum, 17.6, 7.8, and 1.0 micrograms/g in maxillary bone, and 16.4, 4.2, and 0.9 micrograms/g in mandibular bone. The mean bone:serum ratios at 1, 3, and 6 hours were 33.0%, 48.2%, and 36.8%, respectively, for maxillary bone, and 30.7%, 26.2%, and 35.7% for mandibular bone. When compared with previously reported data on the bone:serum ratios in jaw of various other intravenous antibiotics, our results show that penetration of flomoxef into maxillary and mandibular bone is extremely high. As all the intramaxillary and intramandibular concentrations exceed its MIC80 values against clinical isolates of bacteria frequently isolated in cases of infection in the oral and maxillofacial region, it is apparent that one intravenous shot of flomoxef 2 g allows penetration of the drug into the maxillary and mandibular bones at effective concentrations. Flomoxef is therefore potentially useful for the prevention and treatment of infections in the oral and maxillofacial region, as it has excellent penetration into the maxillary and mandibular bones.

  20. Deoxycholic Acid and the Marginal Mandibular Nerve: A Cadaver Study.

    Blandford, Alexander D; Ansari, Waseem; Young, Jason M; Maley, Bruce; Plesec, Thomas P; Hwang, Catherine J; Perry, Julian D

    2018-06-04

    One of the rare but serious complications observed with deoxycholic acid administration is damage to the marginal mandibular nerve. In this study, we evaluated if deoxycholic acid directly induces histologic damage to fresh cadaveric marginal mandibular nerve. A segment of marginal mandibular nerve was harvested from 12 hemifaces of 6 fresh cadavers. The nerve specimen was exposed to either 0.9% sterile saline for 24 h, deoxycholic acid (10 mg/ml) for 20 min, or deoxycholic acid (10 mg/ml) for 24 h. The nerve specimens were then fixed in glutaraldehyde for a minimum of 24 h. Toluidine blue stained sections were evaluated for stain intensity using light microscopy and color deconvolution image analysis. Supraplatysmal fat was harvested as a positive control and exposed to the same treatments as the marginal mandibular nerve specimens, then evaluated using transmission electron microscopy. Toluidine blue staining was less in the marginal mandibular nerve exposed to deoxycholic acid when compared to saline. The specimen exposed to deoxycholic acid for 24 h showed less toluidine blue staining than that of the nerve exposed to deoxycholic acid for 20 min. Transmission electron microscopy of submental fat exposed to deoxycholic acid revealed disruption of adipocyte cell membrane integrity and loss of cellular organelles when compared to specimens only exposed to saline. Deoxycholic acid (10 mg/ml) damages the marginal mandibular nerve myelin sheath in fresh human cadaver specimens. Direct deoxycholic acid neurotoxicity may cause marginal mandibular nerve injury clinically. This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

  1. Update on mandibular condylar fracture management.

    Weiss, Joshua P; Sawhney, Raja

    2016-08-01

    Fractures of the mandibular condyle have provided a lasting source of controversy in the field of facial trauma. Concerns regarding facial nerve injury as well as reasonable functional outcomes with closed management led to a reluctance to treat with an open operative intervention. This article reviews how incorporating new technologies and surgical methods have changed the treatment paradigm. Multiple large studies and meta-analyses continue to demonstrate superior outcomes for condylar fractures when managed surgically. Innovations, including endoscopic techniques, three-dimensional miniplates, and angled drills provide increased options in the treatment of condylar fractures. The literature on pediatric condylar fractures is limited and continues to favor a more conservative approach. There continues to be mounting evidence in radiographic, quality of life, and functional outcome studies to support open reduction with internal fixation for the treatment of condylar fractures in patients with malocclusion, significant displacement, or dislocation of the temporomandibular joint. The utilization of three-dimensional trapezoidal miniplates has shown improved outcomes and theoretically enhanced biomechanical properties when compared with traditional fixation with single or double miniplates. Endoscopic-assisted techniques can decrease surgical morbidity, but are technically challenging, require skilled assistants, and utilize specialized equipment.

  2. Long term results of mandibular distraction

    Batra Puneet

    2006-03-01

    Full Text Available Mandibular distraction osteogenesis has become a popular surgical modality due to its many advantages over conventional orthognathic surgical procedures. However, in spite of the technique having been used for over 15 years, no concrete long term results are available regarding the stability of results. We discuss the various studies which have reported either in favour or against the stablility of results after distraction. We report a series of 6 cases (3 unilateral and 3 bilateral distraction where distraction was carried out before puberty and followed them up to seven years after removal of distractors. This case series shows that results achieved by distraction osteogenesis are unstable or best unpredictable with respect to producing a permanent size increase in the mandible. The role of the distraction osteogenesis in overcoming the pterygomassetric sling is questionable. We suggest a multicenter study with adequate patient numbers treated with a similar protocol and documented after growth cessation to have meaningful conclusions on the debate of distraction osteogenesis versus orthognathic surgery.

  3. Radiographic localization of unerupted mandibular anterior teeth.

    Jacobs, S G

    2000-10-01

    The parallax method and the use of 2 radiographs taken at right angles to each other are the 2 methods generally used to accurately localize teeth. For the parallax method, the combination of a rotational panoramic radiograph with an occlusal radiograph is recommended. This combination involves a vertical x-ray tube shift. Three case reports are presented that illustrate: (1) how this combination can accurately localize unerupted mandibular anterior teeth, (2) how a deceptive appearance of the labiolingual position of the unerupted tooth can be produced in an occlusal radiograph, (3) how increasing the vertical angle of the tube for the occlusal radiograph makes the tube shift easier to discern, (4) why occlusal radiographs are preferable to periapical radiographs for tube shifts, and (5) how localization can also be carried out with 2 radiographs at right angles to each other, one of which is an occlusal radiograph taken with the x-ray tube directed along the long axis of the reference tooth.

  4. Diversity Of Mandibular Morphology In Some Carnivorans

    Rahmat S. J.

    2015-06-01

    Full Text Available Comparison of mandibular morphology of some aquatic (seals, walruses, and sea otters and terrestrial (hyenas and pandas carnivorans demonstrates a rather general pattern correlating size of condyloid angle, size of gape, and diet. Structural differences of carnivoran jaws reveal morphological and ecological adaptations that are directly correlated with availability of prey, diving depth, feeding competition and specialized feeding methods. Specifically, the inclination of the condyloid process relative to the axis of the alveolar row (= condyloid angle can be used to determine dietary preferences, including size of prey. Generally, carnivorans with a large condyloid angle feed on larger prey, while a low condyloid angle suggests feeding on small prey or can be an advantageous feeding mechanism. Mirounga angustirostris (Northern elephant seal displays sex-specific characters in cranial and postcranial elements. Likewise, significant sexually dimorphic differences in the size of condyloid angle imply that deeper-diving male Northern elephant seals have a feeding niche dissimilar to that of females. Morphological assessment of male M. angustirostris suggests they are bottom-feeding seals that utilize a suction-feeding mechanism to capture small prey and crush shells with their teeth, which become weaker as they age.

  5. [Three-dimensional modeling of mandibular distraction].

    Morgon, L A; Trunde, F; Coudert, J L; Disant, F

    2003-12-01

    Facial hemi-atrophy affects 1 in 4000 or 5000 children. We propose treating this deformation of the 1st branchial arch with the "bone distraction" lengthening technique first described by Ilizarov in the 1950s, which has already been employed with the mandible. We have modelled mandibular distraction in facial hemi-atrophy patients and discuss the benefits of such pre-surgical planning encompassing the assistance of pre- and post-operative as well as surgically coordinated orthodontic therapy. Using X scanner views of a 5 year-old girl patient, we have developed a distraction-simulation software, which makes the pathological side harmonious with the healthy side along the medial sagittal plane. In order to obtain facial symmetry, put bones in balance, and orient the occlusal plane horizontally, essential requisites of occlusal stability, it is necessary: to employ a 2 or 3-dimensional distractor, to pre-plan the distraction and screw positioning, to set up a fixed orthodontic treatment plan prior to beginning distraction therapy.

  6. Relationship between mandibular condyle and angle fractures and the presence of mandibular third molars.

    Mah, Deuk-Hyun; Kim, Su-Gwan; Moon, Seong-Yong; Oh, Ji-Su; You, Jae-Seek

    2015-02-01

    We retrospectively evaluated the impact of mandibular third molars on the occurrence of angle and condyle fractures. This was a retrospective investigation using patient records and radiographs. The sample set consisted of 440 patients with mandibular fractures. Eruption space, depth and angulation of the third molar were measured. Of the 144 angle fracture patients, 130 patients had third molars and 14 patients did not. The ratio of angle fractures when a third molar was present (1.26 : 1) was greater than when no third molar was present (0.19 : 1; odds ratio, 6.58; Pcondyle fractures patients, the third molar was present in 84 patients and absent in 57 patients. The ratio of condyle fractures when a third molar was present (0.56 : 1) was lower than when no third molar was present (1.90 : 1; odds ratio, 0.30; Pfractures with third molars and the ratio of condyle fractures without a third molar were statistically significant. The occurrence of angle and condyle fractures was more affected by the continuity of the cortical bone at the angle than by the depth of a third molar. These results demonstrate that a third molar can be a determining factor in angle and condyle fractures.

  7. Intraoperative monitoring of marginal mandibular nerve during neck dissection.

    Tirelli, Giancarlo; Bergamini, Pier Riccardo; Scardoni, Alessandro; Gatto, Annalisa; Boscolo Nata, Francesca; Marcuzzo, Alberto Vito

    2018-05-01

    The purpose of this study was to assess the efficacy of intraoperative nerve integrity monitoring (NIM) to prevent marginal mandibular nerve injuries during neck dissection. This prospective study compared 36 patients undergoing NIM-assisted neck dissection from July 2014 to March 2015 to a cohort of 35 patients subjected to neck dissection over an identical period of time before the technique was introduced. We also assessed possible correlations between marginal mandibular nerve injuries and other factors, such as anthropometric measurements, presence of clinical neck metastases, type of neck dissection, and site of primary tumor. The incidence of marginal mandibular nerve paralyses was significantly lower among the group of patients undergoing NIM-assisted neck dissection (P = .021). There was no significant difference in the duration of the procedure, and the technique resulted in a limited increase of cost. No other factor seemed to influence the onset of marginal mandibular nerve palsy. In our opinion, NIM is a valuable aid for preventing marginal mandibular nerve injuries during neck dissection. © 2018 Wiley Periodicals, Inc.

  8. Evaluation of mandibular condyles in children with unilateral posterior crossbite.

    Illipronti-Filho, Edson; Fantini, Solange Mongelli de; Chilvarquer, Israel

    2015-01-01

    The relationship of mandibular condyle dimensions and its association with unilateral posterior crossbite (UPXB) has been suggested in the literature. The purpose of this prospective study was to evaluate mandibular condyles on the left and right sides and between crossed and non-crossed sides in the sagittal and coronal planes, using cone-beam computed tomography (CBCT). Twenty CBCT images of 40 temporo mandibular joints (TMJs) in individuals in mixed dentition phase, which included 9 males (mean 7.9 years) and 11 females (mean 8.2 years), with unilateral posterior crossbite without premature contacts and functional mandibular shifts and with transverse maxillary deficiency. The criteria for sample exclusion included the presence of painful symptoms, facial trauma history, systemic diseases such as juvenile rheumatoid arthritis, mouth opening limitation (anomalies, and skeletal asymmetries that may result in TMJ disorders. Dimensional measurements of the condyles between the right and left sides and crossed and non-crossed sides in sagittal and coronal view were made. There was no significant difference between the measurements of the crossed and non-crossed sides in both sagittal and coronal view. These findings suggest that the presence of unilateral posterior crossbite in children with UPXB did not result in changes between the mandibular condyles in the right and left sides or between the crossed and non-crossed sides in the coronal or sagittal plane.

  9. Evaluation of mandibular condyles in children with unilateral posterior crossbite

    Edson ILLIPRONTI-FILHO

    2015-01-01

    Full Text Available The relationship of mandibular condyle dimensions and its association with unilateral posterior crossbite (UPXB has been suggested in the literature. The purpose of this prospective study was to evaluate mandibular condyles on the left and right sides and between crossed and non-crossed sides in the sagittal and coronal planes, using cone-beam computed tomography (CBCT. Twenty CBCT images of 40 temporo mandibular joints (TMJs in individuals in mixed dentition phase, which included 9 males (mean 7.9 years and 11 females (mean 8.2 years, with unilateral posterior crossbite without premature contacts and functional mandibular shifts and with transverse maxillary deficiency. The criteria for sample exclusion included the presence of painful symptoms, facial trauma history, systemic diseases such as juvenile rheumatoid arthritis, mouth opening limitation (< 40 mm, congenital or genetic anomalies, and skeletal asymmetries that may result in TMJ disorders. Dimensional measurements of the condyles between the right and left sides and crossed and non-crossed sides in sagittal and coronal view were made. There was no significant difference between the measurements of the crossed and non-crossed sides in both sagittal and coronal view. These findings suggest that the presence of unilateral posterior crossbite in children with UPXB did not result in changes between the mandibular condyles in the right and left sides or between the crossed and non-crossed sides in the coronal or sagittal plane.

  10. Bone changes of mandibular condyle using cone beam computed tomography

    Lee, Ji Un; Kim, Hyung Seop; Song, Ju Seop; Kim, Kyoung A; Koh, Kwang Joon [Chonbuk National Univ., Chonju (Korea, Republic of)

    2007-09-15

    To assess bone changes of mandibular condyle using cone beam computed tomography (CBCT) in temporomandibualr disorder (TMD) patients. 314 temporomandibular joints (TMJs) images of 163 TMD patients were examined at the Department of Oral and Maxillofacial Radiology, Chonbuk National University. The images were obtained by PSR9000N (Asahi Roentgen Co., Japan) and reconstructed by using Asahivision software (Asahi Roentgen Co., Japan). The CBCT images were examined three times with four weeks interval by three radiologists. Bone changes of mandibular condyle such as flattening, sclerosis, erosion and osteophyte formation were observed in sagittal, axial, coronal and 3 dimensional images of the mandibular condyle. The statistical analysis was performed using SPSS 12.0. Intra-and interobserver agreement were performed by 3 radiologists without the knowledge of clinical information. Osteopathy (2.9%) was found more frequently on anterior surface of the mandibular condyle. Erosion (31.8%) was found more frequently on anterior surface of the mandibular condyle. The intraobserver agreement was good to excellent (k=0.78{sub 0}.84), but interobserver agreement was fair (k=0.45). CBCT can provide high qualified images of bone changes of the TMJ with axial, coronal and 3 dimensional images.

  11. Bone changes of mandibular condyle using cone beam computed tomography

    Lee, Ji Un; Kim, Hyung Seop; Song, Ju Seop; Kim, Kyoung A; Koh, Kwang Joon

    2007-01-01

    To assess bone changes of mandibular condyle using cone beam computed tomography (CBCT) in temporomandibualr disorder (TMD) patients. 314 temporomandibular joints (TMJs) images of 163 TMD patients were examined at the Department of Oral and Maxillofacial Radiology, Chonbuk National University. The images were obtained by PSR9000N (Asahi Roentgen Co., Japan) and reconstructed by using Asahivision software (Asahi Roentgen Co., Japan). The CBCT images were examined three times with four weeks interval by three radiologists. Bone changes of mandibular condyle such as flattening, sclerosis, erosion and osteophyte formation were observed in sagittal, axial, coronal and 3 dimensional images of the mandibular condyle. The statistical analysis was performed using SPSS 12.0. Intra-and interobserver agreement were performed by 3 radiologists without the knowledge of clinical information. Osteopathy (2.9%) was found more frequently on anterior surface of the mandibular condyle. Erosion (31.8%) was found more frequently on anterior surface of the mandibular condyle. The intraobserver agreement was good to excellent (k=0.78 0 .84), but interobserver agreement was fair (k=0.45). CBCT can provide high qualified images of bone changes of the TMJ with axial, coronal and 3 dimensional images

  12. 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.

  13. Feasibility of purely endoscopic intramedullary fixation of mandibular condyle fractures.

    Frake, Paul C; Goodman, Joseph F; Joshi, Arjun S

    2015-01-01

    The investigators of this study hypothesized that fractures of the mandibular condyle can be repaired using short-segment intramedullary implants and purely endoscopic surgical technique, using a basic science, human cadaver model in an academic center. Endoscopic instrumentation was used through a transoral mucosal incision to place intramedullary implants of 2 cm in length into osteotomized mandibular condyles. The surgical maneuvers that required to insert these implants, including condyle positioning, reaming, implant insertion, and seating of the mandibular ramus, are described herein. Primary outcome was considered as successful completion of the procedure. Ten cadaveric mandibular condyles were successfully repaired with rigid intramedullary internal fixation without the use of external incisions. Both insertion of a peg-type implant and screwing a threaded implant into the condylar head were possible. The inferior portion of the implant remained exposed, and the ramus of the mandible was manipulated into position on the implant using retraction at the sigmoid notch. The results of this study suggest that purely endoscopic repair of fractures of the mandibular condyle is possible by using short-segment intramedullary titanium implants and a transoral endoscopic approach without the need for facial incisions or punctures. The biomechanical advantages of these intramedullary implants, including improved strength and resistance to mechanical failure compared with miniplates, have been recently established. The combination of improved implant design and purely endoscopic technique may allow for improved fixation and reduced surgical- and implant-related morbidity in the treatment of condylar fractures.

  14. Maxillary advancement for mandibular prognathism: indications and rationale.

    Rosen, H M

    1991-05-01

    The surgical correction of mandibular prognathism has traditionally involved posterior repositioning of the mandibular body. This treatment approach corrects the skeletal disproportion at the expense of reducing facial skeletal volume and can unpredictably result in inadequately supported soft tissues with loss of skeletal definition. In an effort to avoid these sequelae of mandibular reduction, 18 patients diagnosed as having mandibular prognathism were treated with maxillary advancement surgery at the Le Fort I level. Mean patient SNB angle was 85.2 degrees, as compared with a normal 79 +/- 3 degrees. Maxillae were documented to be in normal position relative to both cranial base and Frankfort horizontal. The mean maxillary advancement was 6.9 mm, with a range of 4.5 to 8.8 mm. All patients required genioplasty to reduce vertical chin height and/or to laterally shift the chin. At the time of follow-up (mean 16.2 months), all patients retained cephalometric data suggestive of enlarged mandibles and excessive anterior facial divergence. However, maxillomandibular harmony and facial convexity had been restored without sacrificing skeletal volume. Treatment results demonstrated these faces to be skeletally well proportioned despite lower face protrusion that was beyond "normal." Postoperative appearances were characterized by a well-supported soft-tissue envelope and a highlighted skeletal foundation, creating angular, well-defined lower faces. These findings support the credibility of maxillary advancement as the procedure of choice in selected individuals with mandibular prognathism. Indications and an aesthetic rationale for this surgical approach are presented.

  15. Split-Framework in Mandibular Implant-Supported Prosthesis

    Danny Omar Mendoza Marin

    2015-01-01

    Full Text Available During oral rehabilitation of an edentulous patient with an implant-supported prosthesis, mandibular flexure must be considered an important biomechanical factor when planning the metal framework design, especially if implants are installed posterior to the interforaminal region. When an edentulous mandible is restored with a fixed implant-supported prosthesis connected by a fixed full-arch framework, mandibular flexure may cause needless stress in the overall restorative system and lead to screw loosening, poor fit of prosthesis, loss of the posterior implant, and patient’s discomfort due to deformation properties of the mandible during functional movements. The use of a split-framework could decrease the stress with a precise and passive fit on the implants and restore a more natural functional condition of the mandible, helping in the longevity of the prosthesis. Therefore, the present clinical report describes the oral rehabilitation of an edentulous patient by a mandibular fixed implant-supported prosthesis with a split-framework to compensate for mandibular flexure. Clinical Significance. The present clinical report shows that the use of a split-framework reduced the risk of loss of the posterior implants or screws loosening with acceptable patient comfort over the period of a year. The split-framework might have compensated for the mandibular flexure during functional activities.

  16. The Psychological Status of Patients with Acute Mandibular Injury

    A. N. Pudov

    2012-01-01

    Full Text Available Objective: to define the specific features of the psychological status of patients with acute mandibular injury, to compare a psychological reaction to injury in different age groups and in persons with signs of alcohol addiction. Subjects and methods. The study enrolled 37 patients of both sexes over 15 years of age. The patients were distributed by age and chronic alcohol intoxication. Psychological parameters were determined using personality questionnaires: Spielberg-Hanin, Zung, GHQ-28, and Wein ones. Results. The patients with mandibular injury were found to have higher levels of situational and personality anxiety. A state of depression as a response to acute mandibular injury of reactive genesis was found in 29.8% of cases. Autonomic dysfunction occurred in 62.2% of the patients with mandibular fractures. Occult pathopsychological states were detected in 35.1% of the study group patients. Conclusion. The main found peculiarities of the psychological status of the patients with acute mandibular injury were high anxiety and the considerable incidence of autonomic dysfunction syndrome. There were no great age differences in psychological status and the direction of reactions. The patients with chronic alcohol intoxication more frequently developed a depressive state, but the autonomic dysfunction syndrome was just less often encountered and pathopsychological states were less frequently found. Key words: acute low anxiety depression alcohol abuse, psychological status.

  17. Occlusion and Temporomandibular Function among Subjects with Mandibular Distal Extension Removable Partial Dentures.

    Creugers, N.H.J.; Witter, D.J.; Spijker, A. van 't; Gerritsen, A.E.; Kreulen, C.M.

    2010-01-01

    Objective. To quantify effects on occlusion and temporomandibular function of mandibular distal extension removable partial dentures in shortened dental arches. Methods. Subjects wearing mandibular extension removable partial dentures (n = 25) were compared with subjects with shortened dental arches

  18. Multicentre prospective evaluation of implant-assisted mandibular bilateral distal extension removable partial dentures: patient satisfaction

    Wismeijer, D.; Tawse-Smith, A.; Payne, A.G.T.

    2013-01-01

    Objective To compare the levels of patient satisfaction with either conventional mandibular bilateral distal extension partial dentures or those assisted by bilateral distal implants. Materials and methods Forty-eight participants who were dissatisfied with their existing conventional mandibular

  19. Evaluation of Recurring Esthetic Dental Proportion in Natural Mandibular Anterior Dentition

    Dipti S Shah

    2015-01-01

    Results: After calculating proportions in mandibular anterior teeth, P value was found to be statistically insignificant (P > 0.05. Conclusion: Within the limitations of the study, RED proportion was not seen in mandibular natural dentition.

  20. Signaling pathways regulating the expression of Prx1 and Prx2 in the Chick Mandibular Mesenchyme

    Doufexi, Aikaterini-El; Mina, Mina

    2009-01-01

    Prx1 and Prx2 are members of the aristaless-related homeobox genes shown to play redundant but essential roles in morphogenesis of the mandibular processes. To gain insight into the signaling pathways that regulate expression of Prx genes in the mandibular mesenchyme, we used the chick as a model system. We examined the patterns of gene expression in the face and the roles of signals derived from the epithelium on the expression of Prx genes in the mandibular mesenchyme. Our results demonstrated stage-dependent roles of mandibular epithelium on the expression of Prx in the mandibular mesenchyme and provide evidence for positive roles of members of the fibroblast and hedgehog families derived from mandibular epithelium on the expression of Prx genes in the mandibular mesenchyme. Our studies suggest that endothelin-1 signaling derived from the mesenchyme is involved in restricting the expression of Prx2 to the medial mandibular mesenchyme. PMID:18942149

  1. Toxicidad por dosis repetidas de la solución CM-95 tratada magnéticamente en ratas Sprague Dawley

    Clara E. Martínez

    2008-08-01

    Full Text Available En este trabajo se realizó la evaluación toxicológica a dosis repetidas por el método de test límite del candidato a inmunopotenciador, la solución CM-95 tratada magnéticamente, acorde con las regulaciones de la Organización para la Colaboración Económica y el Desarrollo, incluida en la Guía 407. El objetivo fue establecer las posibles lesiones orgánicas y funcionales ocasionadas por la solución CM-95, tratada magnéticamente con la máxima inducción magnética permisible (0,16 T, para la obtención del candidato a inmunopotenciador. Se emplearon tres grupos: Experimental, Control y Satélite. Como Biomodelo experimental se utilizaron ratas Sprague Dawley machos y hembras con pesos de 150 a 200 g. Durante el estudio no se registraron signos clínicos de toxicidad ni muertes en ninguno de los animales de los grupos tratados, ni en los controles. No hubo afectación del peso corporal durante el ensayo. Aunque hubo variaciones en los valores de algunos parámetros hematológicos y bioquímicos, estos no tuvieron significación biológica. No se encontraron lesiones macroscópicas, ni microscópicas; solo se observaron efectos proliferativos en el tejido linfoide de timo y bazo, relacionados con la respuesta del sistema inmune. La solución CM-95 tratada magnéticamente, no mostró toxicidad en el modelo animal y nivel de dosis utilizado, y bajo las condiciones experimentales ensayadas.

  2. Fratura tipo explosão da coluna torácica e lombar: correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada

    Silva,Matheus Luís da; Tisot,Rodrigo Arnold; Vieira,Juliano Silveira Luiz; Santos,Renato Tadeu dos; Tisot,Orley Fauth

    2013-01-01

    OBJETIVO: Analisar as fraturas tipo explosão da coluna torácica e lombar e fazer a correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada. MÉTODOS: Estudo retrospectivo de 72 pacientes com fraturas tipo explosão da coluna torácica e lombar. O estreitamento do canal vertebral, o colapso vertebral e a cifose local foram avaliados em três segmentos distintos: torácico, transição toracolombar e lombar. RESULTADOS: Houve diferença estatística si...

  3. Caracterização de Enterococcus spp. resistentes isolados de águas não tratadas destinadas ao consumo humano

    Macedo, Ana Sofia

    2011-01-01

    Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Ciências Farmacêuticas. A água não tratada é constantemente desvalorizada como fonte de resistências a antibióticos em países desenvolvidos. Para averiguar este problema de saúde pública, neste trabalho isolaram-se Enterococcus spp. como bactérias indicadoras de contaminação fecal de poços, fontes e minas que fornecem água a diversas comunidades em Portugal e caracterizou-se o s...

  4. Efectos del ibandronato sobre el metabolismo óseo y el perfil de riesgo cardiovascular en mujeres con osteoporosis postmenopáusica tratadas previamente con raloxifeno

    Ferrer Piquer, Marta

    2015-01-01

    “Efectos del ibandronato sobre el metabolismo óseo y el perfil de riesgo cardiovascular en mujeres con osteoporosis postmenopáusica tratadas previamente con raloxifeno” La osteoporosis postmenopáusica es un problema sanitario mundial, dado que las fracturas por fragilidad suponen un aumento importante de morbimortalidad así como del coste económico. En los últimos años se han desarrollado nuevas terapias para el tratamiento de la osteoporosis, siendo por el momento los SERMs y los bi...

  5. The role of simultaneous gap arthroplasty and distraction osteogenesis in the management of temporo-mandibular joint ankylosis with mandibular deformity in children.

    Rao, Krishna; Kumar, Sudhir; Kumar, Vijay; Singh, Arun Kumar; Bhatnagar, Sudhir Kumar

    2004-02-01

    Temporo-mandibular joint ankylosis is a common cause of acquired deformity in children. Surgical correction of the ankylosis only leaves the patient with an uncorrected mandibular deformity. This study was to evaluate the use of distraction osteogenesis for simultaneous correction of the mandibular deformity. This study was done on six children with temporo-mandibular joint ankylosis and mandibular deformity. Uniaxial double pin distractors with Schanz pins were used in this study. The patients underwent simultaneous gap arthroplasty and mandibular osteotomy (retromolar) with distractor insertion. Distraction was started on the fifth post-operative day. The patients were put on dynamic temporo-mandibular joint exercises on the first post-operative day. All patients had a satisfactory mouth opening on follow-up. Satisfactory cosmetic correction of the mandibular deformity was also achieved in all these patients. Some degree of malocclusion resulted from treatment due to which the patients were placed on orthodontic treatment. Distraction osteogenesis can be used simultaneously with gap arthroplasty in patients with temporo-mandibular ankylosis, for the correction of the mandibular deformity.

  6. Recurrent osteochondroma of the mandibular condyle: A case report

    Kwon, Young Eun; Choi, Karp Shik; An, Chang Hyeon; Choi, So Young; An, Seo Young; Lee, Jae Seo

    2017-01-01

    A 21-year-old woman presented with facial asymmetry. Crepitus and clicking of the temporomandibular joint were noted. The midline deviated 5.5 mm to the left, and secondary malocclusion was observed. Panoramic and cone-beam computed tomographic images showed an irregular and exophytic bony mass on the anteromedial surface of the right mandibular condyle. A 3-phase bone scan revealed increased tracer uptake on the affected side. The lesion was treated with excision and reshaping under the diagnosis of osteochondroma confirmed by a histopathological examination. The lesion recurred after 3 years, and the patient underwent condylectomy. Mandibular condylar osteochondroma is often resected because it causes functional and aesthetic problems, but it rarely recurs. To the best of our knowledge, only 2 cases of recurrent osteochondromas of the mandibular condyle have been reported previously. Surgical treatment of the osteochondroma should be performed considering the possibility of recurrence, and long-term follow-up is recommended

  7. Recurrent osteochondroma of the mandibular condyle: A case report

    Kwon, Young Eun; Choi, Karp Shik; An, Chang Hyeon; Choi, So Young; An, Seo Young [School of Dentistry, Kyungpook National University, Daegu (Korea, Republic of); Lee, Jae Seo [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Chonnam National University, Gwangju (Korea, Republic of)

    2017-03-15

    A 21-year-old woman presented with facial asymmetry. Crepitus and clicking of the temporomandibular joint were noted. The midline deviated 5.5 mm to the left, and secondary malocclusion was observed. Panoramic and cone-beam computed tomographic images showed an irregular and exophytic bony mass on the anteromedial surface of the right mandibular condyle. A 3-phase bone scan revealed increased tracer uptake on the affected side. The lesion was treated with excision and reshaping under the diagnosis of osteochondroma confirmed by a histopathological examination. The lesion recurred after 3 years, and the patient underwent condylectomy. Mandibular condylar osteochondroma is often resected because it causes functional and aesthetic problems, but it rarely recurs. To the best of our knowledge, only 2 cases of recurrent osteochondromas of the mandibular condyle have been reported previously. Surgical treatment of the osteochondroma should be performed considering the possibility of recurrence, and long-term follow-up is recommended.

  8. Two independent anion transport systems in rabbit mandibular salivary glands

    Novak, I; Young, J A

    1986-01-01

    Cholinergically stimulated Cl and HCO3 transport in perfused rabbit mandibular glands has been studied with extracellular anion substitution and administration of transport inhibitors. In glands perfused with HCO3-free solutions, replacement of Cl with other anions supported secretion in the foll......Cholinergically stimulated Cl and HCO3 transport in perfused rabbit mandibular glands has been studied with extracellular anion substitution and administration of transport inhibitors. In glands perfused with HCO3-free solutions, replacement of Cl with other anions supported secretion...... stimulated secretion by about 30%, but when infused in addition to furosemide (0.1 mmol/l), it inhibited by about 20%. Amiloride (1.0 mmol/l) caused no inhibition. The results suggest that there are at least three distinct carriers in the rabbit mandibular gland. One is a furosemide-sensitive Na-coupled Cl...

  9. Surgical-prosthetic treatment of large mandibular cysts

    Džambas Ljubiša D.

    2003-01-01

    Full Text Available This paper presents a combined surgical-prosthetic procedure of reconstructing mandibular bone defect in a 53 year old patient, following enucleation of a mandibular cyst (Cystectomy Partsch II. After a thorough diagnostic evaluation, a surgical procedure was planned with the particular attention to the nature of the disease, patient’s condition, size and extension of the cyst, tissue loss, and the possibilities of prosthetic management of a mandibular bone defect with partial postresection dental prosthesis. It is of great importance to point to the significance of teamwork of a maxillofacial surgeon and a specialist in prosthodontics. This kind of cooperation provided very effective and less risky soft tissue, as well as bone tissue regeneration (osteogenesis. The patient’s recovery was fast, and he could return to his daily activities and work without significant changes regarding quality of life after surgery and prosthetic treatment.

  10. Cementoblastoma Relating to Right Mandibular Second Primary Molar

    Sivakumar Nuvvula

    2016-01-01

    Full Text Available 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.

  11. Mandibular incisive canal in relation to periapical surgery

    Kani Bilginaylar

    2016-01-01

    Full Text Available The aim of the present paper is to emphasize the importance of the mandibular interforaminal neurovascular bundle with a case and make a warning to dentists and surgeons during oral and maxillofacial surgeries, such as implant replacement, bone harvesting, genioplasty, open reduction of a mandibular fracture, and cyst enucleations at this region. In this paper, we present a 58-year-old male who referred with pain and a tingling sensation on the left lower lip. After radiographical, extraoral and intraoral examinations, findings indicated the lesion to be a cyst which was related with a periapical lesion of the canine tooth and extracted socket of first premolar tooth. After removal of a cyst, the mandibular incisive nerve was documented which was in relation to cyst cavity.

  12. Desenho de placa em forma de borboleta para tratamento de fraturas do calcâneo Design of butterfly-shaped plate and its application in treatment for calcaneal fractures

    Guangrong Yu

    2012-12-01

    Full Text Available OBJETIVO: Apresentar um desenho de placa em forma de borboleta e sua aplicação no tratamento de fraturas do calcâneo e discutir suas indicações clínicas, vantagens e desvantagens. MÉTODOS: De fevereiro de 2008 a abril de 2010, 22 pacientes com 26 fraturas intra-articulares do calcâneo foram tratados com redução a céu aberto e fixação interna com placa em forma de borboleta. Dezesseis pacientes eram homens e 6 eram mulheres, com média de idade de 36,8 anos. Onze eram pés esquerdos e 15, direitos. De acordo com a classificação de Sanders, 12 eram fraturas de calcâneo Tipo II (inclusive 3 Tipo IIa, 7 Tipo IIb e 2 Tipo IIc e 14 eram Tipo III (inclusive cinco do Tipo IIIab, 7 Tipo IIIac e duas do Tipo IIIbc. RESULTADOS: Dezessete pacientes (21 pés foram submetidos a acompanhamento por em média 19,2 meses. Os desfechos funcionais foram avaliados com o sistema Maryland Foot Score. Entre os nove pés com fraturas Tipo II, sete receberam escore excelente e dois, bom. Entre as 12 fraturas Tipo III, seis tiveram escore excelente, cinco, bom e uma, razoável. CONCLUSÃO: A placa em forma de borboleta é aplicável ao tratamento de fraturas do calcâneo do Tipo II e Tipo III de Sanders, com a vantagem de garantir fixação confiável, facilitar a cirurgia, produzir menos complicações pós-operatórias e produzir melhores desfechos clínicos gerais. Nível de Evidência IV, Série de casos.OBJECTIVE: To introduce the design of butterfly-shaped plate and its application in treatment for calcaneal fractures, and to discuss its clinical indications, advantages and disadvantages. METHODS: From February 2008 to April 2010, 22 patients with 26 intra-articular calcaneal fractures were treated by open reduction and internal fixation with butterfly-shape plate. Sixteen patients were male and 6 patients were female, with a mean age of 36.8 years. Eleven were left feet and 15, right. According to Sanders classification, 12 were Type II (including 3

  13. Fratura epifisiolise da extremidade proximal do úmero com luxação intratorácica: relato de caso Epiphysiolysis fracture of the proximal end of the humerus with intrathoracic dislocation: a case report

    Jaime Guiotti Filho

    2008-02-01

    Full Text Available A fratura da extremidade proximal do úmero com luxação intratorácica foi relatada em 1949 por West, em que a fratura era, somente, do tubérculo maior. Desde então, poucos casos foram relatados na literatura, a maioria constituída por pessoas idosas, prevalecendo como indicação terapêutica artroplastia parcial. Os autores relatam o caso de um adolescente de 14 anos de idade, sexo masculino, que apresentou fratura epifisiolise da extremidade proximal do úmero com luxação intratorácica em decorrência de acidente ciclístico e que foi submetido a tratamento cirúrgico com redução, osteossíntese e reinserção do manguito rotador. A recuperação da cabeça do úmero totalmente desvitalizada e o acompanhamento do processo de necrose e revas cularização durante seis anos, em paciente adolescente, parece não terem sido previamente relatados.Fracture of the proximal end of the humerus with intrathoracic dislocation was reported in 1949 by West, and the fracture was only a fracture of the greater tubercle. Few cases have since been published, and most of them in elderly individuals, partial arthroplasty prevailing as the therapy indication. The authors report the case of a 14 year old boy who presented with an epiphysiolysis fracture of the proximal end of the humerus with intrathoracic dislocation resulting from a bicycle accident. The boy was submitted to surgical treatment with reduction, osteosynthesis, and reinsertion of the rotator cuff. The totally devitalized humeral head recovery and the monitoring of the necrosis and revascularization process for a period of six years in a teenager patient seems to have never been reported before.

  14. Avaliação do emprego da haste femoral curta na fratura trocantérica instável do fêmur Evaluating the use of a proximal femoral nail in unstable trochanteric fracture of the femur

    João Antonio Matheus Guimarães

    2008-09-01

    Full Text Available OBJETIVO: Identificar a taxa de consolidação da fratura trocantérica instável submetida a osteossíntese com haste femoral curta (PFN® - AO/ASIF, em pacientes operados entre novembro de 1999 e março de 2004. MÉTODOS: Foram analisados 45 pacientes com idades entre 60 e 93 anos, portadores de fratura trocantérica instável do fêmur, submetidos à osteossíntese com PFN® curto, mediante redução indireta em mesa de tração e auxílio de radioscopia. As fraturas foram classificadas de acordo com a classificação AO/OTA. A qualidade óssea foi avaliada através do índice de Singh, na rotina radiográfica pré-operatória. A qualidade da redução obtida e o posicionamento do implante foram avaliados pela radiografia pós-operatória em ântero-posterior e perfil do fêmur proximal, com análise do ângulo cervicodiafisário e a distância entre a ponta do parafuso deslizante e o centro da cabeça femoral, o chamado tip apex distance (TAD. RESULTADOS: A média de idade dos pacientes estudados foi de 80,8 anos (60-93. O sexo feminino foi predominante, com 37 casos (82,2%. O lado direito foi acometido em 22 casos (48,89% e o esquerdo em 23 (51,1%. Todas as fraturas eram instáveis, sendo 22 do tipo 31A2 (48,8% e 23 do tipo 31A3 (51,1%. O tempo médio de utilização da radioscopia foi de 102,4 segundos (61-185. A diferença entre o tempo de radioscopia para a redução e fixação dos dois grupos de fraturas estudados não foi significativa (p = 0,62. Com relação à qualidade óssea, 82,2% dos pacientes apresentavam índice de Singh menor que IV, caracterizando perda da arquitetura óssea normal. Quanto à consolidação da fratura, 44 casos evoluíram com êxito com tempo médio de 3,2 meses, variando entre dois e sete meses. Em sete casos ocorreu a necessidade de novo procedimento cirúrgico, sendo quatro para a retirada de material de síntese, devido a migração dos parafusos proximais da haste. Um caso de fratura do tipo 31A2

  15. Tenacidade à fratura translaminar dinâmica de um laminado híbrido metal-fibra para uso em elevadas temperaturas Translaminar dynamic fracture toughness of a hybrid fiber-metal laminate devised to high-temperature applications

    José R. Tarpani

    2010-01-01

    Full Text Available A tenacidade à fratura translaminar dinâmica do laminado híbrido metal-fibra titânio-grafite com matriz termoplástica foi determinada sob as velocidades de impacto de 2,25 e 5,52 m/s, no intervalo de temperaturas de -196 a +180 °C, e comparada à de laminados compósitos convencionais de fibras de carbono e resina epóxi. Constatou-se que o laminado híbrido exibe uma tenacidade à iniciação da fratura inferior à dos compósitos tradicionais com fibras na forma de fita unidirecional, porém superior à dos laminados convencionais com fibras na forma de tecido bidirecional. Os ensaios de impacto revelaram que, comparativamente ao desempenho mecânico dos laminados carbono-epóxi, o emprego do laminado híbrido metal-fibra se justifica mais pela sua resistência à propagação do que à iniciação da fratura dinâmica.The translaminar dynamic fracture toughness of titanium-graphite hybrid fiber-metal laminate with thermoplastic matrix has been determined at the impact velocities of 2.25 and 5.52 m/s, within the temperature range from -196 to +180 ºC, and compared to that of conventional carbon-epoxy composite laminates. The hybrid laminate exhibits lower initiation fracture toughness than traditional unidirectional tape composites though it is tougher than conventional woven fabric laminates. Impact tests revealed that, if compared to the mechanical performance of conventional carbon-epoxy laminates, the fiber-metal laminate application must rely on its resistance to dynamic fracture propagation rather than on fracture initiation.

  16. Early Experience with Biodegradable Fixation of Pediatric Mandibular Fractures

    Mazeed, Ahmed Salah; Shoeib, Mohammed Abdel-Raheem; Saied, Samia Mohammed Ahmed; Elsherbiny, Ahmed

    2014-01-01

    This clinical study aims to evaluate the stability and efficiency of biodegradable self-reinforced poly-l/dl-lactide (SR-PLDLA) plates and screws for fixation of pediatric mandibular fractures. The study included 12 patients (3–12 years old) with 14 mandibular fractures. They were treated by open reduction and internal fixation by SR-PLDLA plates and screws. Maxillomandibular fixation was maintained for 1 week postoperatively. Clinical follow-up was performed at 1 week, 6 weeks, 3 months, and...

  17. Management of pediatric mandibular fracture: a case series.

    Agarwal, Ravi M; Yeluri, Ramakrishna; Singh, Chanchal; Chaudhry, Kalpna; Munshi, Autar K

    2014-09-01

    A pediatric mandibular fracture can cause a child severe pain and the parent or caregiver extreme worry. While the pattern of fractures and associated injuries in children is similar to adults, the incidence is low. Due to a number of factors, including the anatomical complexity of the developing mandible in a child, management of such fractures differs from that of adults and can greatly challenge the pediatric dentist. Various treatment modalities of managing mandibular fracture are available, such as closed/open cap splint with circummandibular wiring, arch-bar fixation, and cementation of the cap splint. This article reviews 19 cases in the management of pediatric facial fracture using varied treatment methods.

  18. Endodontic and periodontal treatments of a geminated mandibular first premolar.

    Aryanpour, S; Bercy, P; Van Nieuwenhuysen, J-P

    2002-02-01

    To describe a rare case of gemination involving a mandibular first premolar. The complex morphology of geminated teeth renders their endodontic and periodontal management difficult. Root canal and periodontal treatments were performed on a geminated mandibular first premolar with three canals. Clinical examination showed two separated crowns with united roots. Radiographically, two distinct pulp chambers with two joined and a third independent canal were seen. Conventional root canal treatment resulted in complete healing of the apical lesion. However, the occurrence of a vertical fracture led to the extraction of the mesial segment. At the follow-up visit, the distal segment was clinically healthy and continued to satisfy functional demands.

  19. Posttraumatic Mandibular Asymmetry Presenting in a Young Adult

    Mahnaz Sheikhi, DDS,MS

    2017-03-01

    Full Text Available One of the most common sites of injury of the facial skeleton is mandibular condyle. However, it is the least diagnosed site of trauma in the head and neck regions. A trauma to the mandible and specifically condylar zone during childhood, may lead to asymmetry or mandibular bilateral distortion, which is usually manifested in the second decade of life when the etiology is unknown to most people. This report is about an adult male complaining about facial asymmetry with an unknown source. Obvious clicking at the right side and shorter right ramus and condyle's head deviation directed us to a childhood trauma and fracture.

  20. Evaluation of aural manifestations in temporo-mandibular joint dysfunction.

    Sobhy, O A; Koutb, A R; Abdel-Baki, F A; Ali, T M; El Raffa, I Z; Khater, A H

    2004-08-01

    Thirty patients with temporo-mandibular joint dysfunction were selected to investigate the changes in otoacoustic emissions before and after conservative treatment of their temporo-mandibular joints. Pure tone audiometry, transient-evoked otoacoustic emissions (TEOAE), distortion-product otoacoustic emissions (DPOAE) as well as a tinnitus questionnaire were administered to all patients before and after therapy. Therapy was conservative in the form of counselling, physiotherapy, anti-inflammatory agents, muscle relaxants, and occlusal splints. Results indicated insignificant changes in the TEOAEs, whereas there were significant increases in distortion product levels at most of the frequency bands. These results were paralleled to subjective improvement of tinnitus.

  1. Computerized tomography of the mandibular joints and masticatory muscles

    Huels, A.B.

    1981-01-01

    A methodology for computerized tomography of the mandibular joints was developed and applied in 80 test persons. Imaging of the mandibular joints is possible with a tomographic technique with 5 mm-overlap, full utilisation of the enlargement capacity of the imaging device, and combined use of transversal and coronary tomography. The method yields full latero-medial, cranio-caudal and anterior-posterior views of the condyle and fossa contours, free of interferences and of distortions caused by the projection. Positional diagnoses are thus possible as well as diagnoses of pathological structural changes. (orig./MG) [de

  2. Clinical and orthopantomographic evaluation of mandibular third molar

    F K Saraswati

    2010-01-01

    Full Text Available Objective: To evaluate sensitivity of orthopentograph (OPG in assessing the number and morphology of roots of the mandibular third molar. Materials and Methods : The study population consisted of 100 ILTMs (impacted lower third molars ranging from 18 to 42 years with equal sex distribution. All the teeth were subsequently extracted , collected and compared with OPG features for position, numb,er, morphology, and relation to mandibular canal. Conclusion: In conclusion, a large sample study is suggested with techniques like Clark′s and right angle technique which determines the three-dimensional orientation of the impacted teeth.

  3. Relação entre qualidade de vida e fratura vertebral em mulheres idosas residentes no Sul do Brasil Relationship between quality of life and vertebral fractur in older women living in Southern Brazil

    Patrícia Pereira de Oliveira

    2011-05-01

    Full Text Available OBJETIVO: Verificar a relação entre qualidade de vida e fratura vertebral em mulheres com mais de 60 anos em uma cidade do Sul do Brasil. MÉTODOS: Realizado estudo caso-controle com aplicação do questionário WHOQOL-bref em 100 mulheres residentes na cidade Chapecó (SC, com idade superior a 60 anos, na pós-menopausa de raça branca ou caucasoide, sem prejuízo cognitivo importante ou história pessoal doenças que sabidamente afetem o metabolismo ósseo ou neoplasias malignas. A população foi dividida em dois grupos dependendo da existência ou não de fraturas vertebrais na radiografia de coluna. Foram analisadas variáveis relacionadas à historia médica atual e pregressa, hábitos de vida e história familiar de fraturas, e os domínios e facetas que compõe o WHOQOL-bref. RESULTADOS: Observou-se que as mulheres com fratura tinham maior média de idade do que as sem fraturas (p0,05. Na avaliação dos domínios que compõem o WHOQOL-bref, a maior média deste grupo foi no psicológico (..=63,6±13,0, e a menor no meio ambiente (..=58,8±9,3. No grupo sem fratura, a maior média também ocorreu no domínio psicológico (..=67,2±9,3, já a menor ocorreu no das relações sociais (..=57,5±7,7. A análise estatística não mostrou correlação significativa entre as médias das facetas que compõem os domínios entre os grupos com e sem fraturas. CONCLUSÃO: Este estudo sugere não haver prejuízo na qualidade de vida de idosas com fratura vertebral, mas sua relação com o tempo de ocorrência e gravidade das fraturas deve ser melhor avaliada. Ambos grupos tiveram escores mais elevados no domínio psicológico, mostrando que as entrevistadas se apóiam em crenças pessoais, espiritualidade e religião, aceitam sua aparência física mantendo a autoestima e a capacidade de pensar, aprender e concentrar-se, independentemente da existência do agravo. Não houve diferença estatisticamente significativa entre os grupos, e nem entre os

  4. Detecção de fraturas radiculares em imagens de tomografia computadorizada de feixe cônico utilizando diferentes parâmetros de exposição e materiais intracanais

    Pinto, Martina Gerlane de Oliveira

    2015-01-01

    O objetivo deste estudo foi avaliar a detecção de fraturas radiculares (FRs) em imagens de Tomografia Computadorizada de Feixe Cônico (TCFC) utilizando diferentes parâmetros de exposição e analisar a influência da guta- percha, do núcleo metálico fundido e do pino de fibra de vidro no diagnóstico das FRs, assim como a formação de artefatos em TCFC. Cento e sessenta dentes foram selecionados e divididos em quatro grupos de acordo com o material de preenchimento (sem guta-percha, com guta-perch...

  5. Proximal mandibular nerve block using electrolocation in 10 dogs undergoing mandibular surgery: a case series report.

    Giuliano Ravasio

    2016-06-01

    Full Text Available Peripheral nerve block performed using electrical stimulation (i.e. electrolocation is widely used for perioperative pain management during several surgical procedures in dogs (Campoy 2008, but few data are reported concerning its application to invasive maxillofacial surgery (Carotenuto et al 2011. The aim of this case series report is to evaluate the efficacy of proximal mandibular nerve block (PMNB in perioperative pain management in dogs undergoing mandibulectomy. Ten dogs of various breeds, (six spayed females and four neutered males of 10.353.09 years and mean weight of 19.5615.19 kg presenting either neoplasia or mandibular fracture and scheduled for mandibulectomy were premedicated with intramuscular acepromazine maleate (0.02 mg/kg; after induction of general anaesthesia, bilateral PMNB was performed with ropivacaine 0.75% (2 mg/kg inserting the stimulated needle in temporomandibular joint direction. Whenever intraoperative nociception occurred, intravenous rescue analgesia was provided (fentanyl 3 g/kg. Carprofen was administered subcutaneously as a sole postoperative treatment (3 mg/kg and postoperative analgesia was assessed for at least 24 hours by a blind operator, accordingly to the Glasgow composite pain scale (Reid et al 2007; when it overcame a threshold of 5/24, intravenous rescue analgesia was administered (methadone, 0.2 mg/kg. In eight out of ten dogs no intraoperative nociception was shown, while in two dogs a single intravenous fentanyl administration was sufficient to provide additional analgesia. No acute and medium term complications were observed and postoperative analgesia lasted for 20.5±6.1 hours. PMNB seems to provide effective perioperative long-lasting analgesia leading to a reduction in intra- and postoperative drug administration.

  6. Orthodontic Extraction of High-Risk Impacted Mandibular Third Molars in Close Proximity to the Mandibular Canal: A Systematic Review.

    Kalantar Motamedi, Mahmood Reza; Heidarpour, Majid; Siadat, Sara; Kalantar Motamedi, Alimohammad; Bahreman, Ali Akbar

    2015-09-01

    Extraction of mandibular third molars (M3s) in close proximity to the mandibular canal has some inherent risks to adjacent structures, such as neurologic damage to teeth, bone defects distal to the mandibular second molar (M2), or pathologic fractures in association with enlarged dentigerous cysts. The procedure for extrusion and subsequent extraction of high-risk M3s is called orthodontic extraction. This is a systematic review of the available approaches for orthodontic extraction of impacted mandibular M3s in close proximity to the mandibular canal and their outcomes. The PubMed, Scopus, Cochrane Central Register of Controlled Trials (CENTRAL), DOAJ, Google Scholar, OpenGrey, Iranian Science Information Database (SID), Iranmedex, and Irandoc databases were searched using specific keywords up to June 2, 2014. Studies were evaluated based on predetermined eligibility criteria, treatment approaches, and their outcomes. Thirteen articles met the inclusion criteria. A total of 123 impacted teeth were extracted by orthodontic extraction and 2 cases were complicated by transient paresthesia. Three types of biomechanical approaches were used: 1) using the posterior maxillary region as the anchor for orthodontic extrusion of lower M3s, 2) simple cantilever springs attached to the M3 buttonhole, and 3) cantilever springs tied to a bonded orthodontic bracket on the M3 plus multiple-loop spring wire for distal movement of the M3. Osteo-periodontal status of M2s also improved uneventfully. Despite the drawbacks of orthodontic extraction, removal of deeply impacted M3s using the described techniques is safe with regard to mandibular nerve injury and neurologic damage. Orthodontic extraction is recommended for extraction of impacted M3s that present a high risk of postoperative osteo-periodontal defects on the distal surface of the adjacent M2 and those associated with dentigerous cysts. Copyright © 2015 American Association of Oral and Maxillofacial Surgeons. Published by

  7. Caracterização por FT-IR da superfície de borracha EPDM tratada via plasma por micro-ondas

    Renata P. dos Santos

    2012-01-01

    Full Text Available A superfície de uma borracha de etileno-propileno-dieno (EPDM vulcanizada foi modificada via plasma por microondas, com gases Ar, Ar/O2, N2/O2 e N2/H2, tendo como objetivo melhorar as propriedades adesivas da superfície. A técnica FT-IR/UATR foi escolhida para caracterizar as superfícies após tratamento, pois apresentou menor interferência dos ingredientes da formulação da EPDM, dentre as técnicas analisadas (ATR/KRS-5 e Ge. Grupos oxigenados foram inseridos na superfície da amostra tratada, mesmo quando não foi utilizado o oxigênio, pois estes grupos foram formados quando a superfície ativada foi exposta à atmosfera. Já em tratamentos contendo N2, grupos oxigenados e possíveis grupos nitrogenados foram identificados por FT-IR. Redução nos valores do ângulo de contato, aumento no trabalho de adesão e aumento no ensaio de resistência ao descascamento (EPDM × Poliuretano foram observados após tratamento com Ar e N2/H2, resultando em melhora nas propriedades adesivas da superfície tratada.

  8. Management of mandibular body fractures in pediatric patients: a case report with review of literature.

    John, Baby; John, Reena R; Stalin, A; Elango, Indumathi

    2010-10-01

    Mandibular fractures are relatively less frequent in children when compared to adults, which may be due to the child's protected anatomic features and infrequent exposure of children to alcohol related traffic accidents. Treatment principles of mandibular fractures differ from that of adults due to concerns regarding mandibular growth and development of dentition. A case of a 4.5-year-old boy with fractured body of mandible managed by closed reduction using open occlusal acrylic splint and circum mandibular wiring is presented. This article also provides a review of literature regarding the management of mandibular body fracture in young children.

  9. Superolateral dislocation of an intact mandibular condyle into the temporal fossa: case report and literature review.

    Sharma, Divashree; Khasgiwala, Ankit; Maheshwari, Bharat; Singh, Charanpreet; Shakya, Neelam

    2017-02-01

    Temporomandibular joint dislocation refers to the dislodgement of mandibular condyle from the glenoid fossa. Anterior and anteromedial dislocations of the mandibular condyle are frequently reported in the literature, but superolateral dislocation is a rare presentation. This report outlines a case of superolateral dislocation of an intact mandibular condyle that occurred in conjunction with an ipsilateral mandibular parasymphysis fracture. A review of the clinical features of superolateral dislocation of the mandibular condyle and the possible techniques of its reduction ranging from the most conservative means to extensive surgical interventions is presented. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  10. Management of mandibular body fractures in pediatric patients: A case report with review of literature

    Baby John

    2010-01-01

    Full Text Available Mandibular fractures are relatively less frequent in children when compared to adults, which may be due to the child′s protected anatomic features and infrequent exposure of children to alcohol related traffic accidents. Treatment principles of mandibular fractures differ from that of adults due to concerns regarding mandibular growth and development of dentition. A case of a 4.5-year-old boy with fractured body of mandible managed by closed reduction using open occlusal acrylic splint and circum mandibular wiring is presented. This article also provides a review of literature regarding the management of mandibular body fracture in young children.

  11. Artroplastia parcial no tratamento das fraturas do colo do fêmur Hemiarthroplasty in the treatment of fractures of the femoral neck

    Nelson Keiske Ono

    2010-01-01

    Full Text Available OBJETIVO: Realizar avaliação epidemiológica e clínica dos pacientes com fratura desviada do colo femoral, que foram submetidos ao tratamento cirúrgico, com artroplastia parcial do quadril cimentada. MÉTODOS: Foram avaliados, de forma retrospectiva, todos os pacientes com fratura desviada do colo do fêmur (Garden III e IV submetidos à artroplastia parcial do quadril com prótese unipolar (Thompson, cimentada pela via de acesso posterolateral do quadril, no período de junho de 2005 a setembro de 2008. RESULTADOS: Foram avaliados, inicialmente, 70 pacientes. A média de idade foi de 83,1 anos. Houve predomínio de pacientes do sexo feminino (84,3%. Houve acompanhamento ambulatorial de 36 pacientes, cujo tempo de seguimento variou de 10 a 48 meses (média de 26,5 meses. Houve perda de seguimento de 15 pacientes. Dezenove pacientes foram a óbito, com uma taxa de mortalidade no primeiro ano de 25,4%. Os pacientes classificados como ASA III apresentaram taxa de 25,7%, enquanto os pacientes ASA II, uma taxa de 12,1%. Dois pacientes apresentaram trombose venosa profunda sintomática; um paciente, infecção do sítio operatório; e nenhum paciente apresentou luxação do quadril. A maioria dos pacientes evoluiu sem dor. Doze pacientes (33%, durante a evolução, apresentaram piora na capacidade de deambulação. CONCLUSÃO: Nenhum caso de luxação do quadril foi observado. Os pacientes classificados como ASA III apresentaram um índice de mortalidade mais elevado, em relação aos pacientes ASA I e II. Houve uma piora da capacidade de deambular em 33% dos pacientes. Não foi necessária revisão de nenhum paciente por soltura ou dor. Trinta pacientes não apresentavam dor (83,3%, quatro apresentavam dor moderada (11,1% e dois apresentavam dor intensa (5,5%.OBJETIVE: To epidemiologically and clinically evaluate patients with displaced femoral neck fractures that had surgical treatment with cemented hemiarthroplasty. METHODS: We evaluated

  12. Avaliação da tenacidade à fratura de diferentes sistemas cerâmicos Relative fracture toughness of differents dental ceramics

    Clovis Pagani

    2003-03-01

    Full Text Available Embora as cerâmicas possuam alta resistência à compressão, apresentam friabilidade devido à sua baixa resistência à tração e, desta forma, possuem menor capacidade de absorver impactos. Este trabalho avaliou a tenacidade à fratura de diferentes sistemas cerâmicos, que refere-se à medida da habilidade de absorção da energia de deformação de um material friável. Foram confeccionados 30 corpos-de-prova em forma de discos (5mmx3mm utilizando-se três diferentes materiais cerâmicos, os quais foram divididos em 3 grupos: G1-10 amostras confeccionadas com a cerâmica Vitadur Alpha (Vita-Zahnfabrik; G2-10 amostras confeccionadas com a cerâmica IPS Empress 2 (Ivoclar-Vivadent e G3-10 amostras confeccionadas com a cerâmica In-Ceram Alumina (Vita-Zahnfabrik. Para a obtenção dos valores de tenacidade foi utilizada a técnica da indentação que se baseia na série de fissuras que se formam sob uma carga pesada. Foram realizadas 4 impressões por amostra, utilizado um microdurômetro (Digital Microhardness Tester FM com uma carga de 500gf, durante 10 segundos. A análise estatística dos dados (Testes ANOVA de Kruskal-Wallis e Dunn, indica que a cerâmica In-Ceram Alumina apresentou valor mediano (2,96N/m3/2, estatisticamente diferente do apresentado pela IPS Empress 2 (1,05N/m3/2, enquanto que a cerâmica Vitadur Alpha apresentou valores intermediários (2,08N/m3/2, sem diferenças estatísticas dos outros dois materiais. Conclui-se que as cerâmicas apresentam diferentes desempenhos de tenacidade à fratura, sendo a In-Ceram capaz de absorver maior energia comparada a Vitadur Alpha e ao IPS Empress2.Although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. This study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. Three ceramic systems were

  13. Treatment of complex acute proximal humerus fractures using hemiarthroplasty Tratamento das fraturas complexas agudas da extremidade proximal do úmero com o uso de hemiartroplastia

    Bruno Lobo Brandão

    2013-01-01

    Full Text Available OBJECTIVE: Evaluate the clinical and radiological results of hemiarthroplasty for treatment of complex proximal humerus fractures. METHODS: Sixty-seven patients were included, with follow-up of 12 to 62 months. Mean age was 65 years (44 to 88, and 47 patients were female (70%. Clinical assessment was performed using the University of California Los Angeles score (UCLA and measurement of range of motion (ROM according to the American Academy of Orthopaedic Surgeons criteria. A standardized radiological evaluation was conducted, with special attention to healing and position of tuberosities. Patients were divided into two groups: A (anatomical healing of tuberosities and B (without anatomical healing of tuberosities. Statistical analyses were performed using the t test. Level of significance was set at p OBJETIVO: Avaliar os resultados funcionais e radiográficos dos pacientes submetidos à hemiartroplastia para tratamento das fraturas complexas da extremidade proximal do úmero. MÉTODOS: Foram incluídos 67 pacientes, com seguimento que variou entre 12 e 62 meses. A média de idade foi de 65 anos (44 a 88 e 47 pacientes eram do sexo feminino (70%. Os pacientes foram avaliados clinicamente por meio da avaliação da amplitude de movimentos (ADM e do escore funcional da University of California Los Angeles (UCLA. A avaliação radiográfica foi feita de forma padronizada com divisão dos pacientes em dois grupos: A (consolidação do tubérculo maior em posição anatômica e B (ausência de consolidação anatômica do tubérculo maior. Na análise estatística consideramos significativos os achados com p < 0,05. RESULTADOS: A pontuação média do UCLA foi de 26 pontos, com média de oito pontos para dor e 64 pacientes satisfeitos subjetivamente (96%. Na avaliação da amplitude de movimento (ADM ativa encontramos uma média de 104º de flexão anterior e 36º de rotação lateral. No grupo A, com 33 pacientes, encontramos uma média de 122º de

  14. Sorción de hidrolizados proteicos en lana tratada con bisulfito sódico: influencia en las propiedades químicas y físico-mecánicas.

    Gómez de Paula, Ma Nieves; Naik Kardile, Arun; Juliá Ferrés, Ma. Rosa; Erra Serrabasa, Pilar

    1997-01-01

    La sorción de hidrolizados proteicos en fibras queratinicas provoca una mejora en las propiedades físicas y quimicas de fibras dañadas. En este trabajo se presentan los resultados de las modificaciones de estas propiedades en lana tratada con bisulfito sódico e hidrolizado proteico bien de colágeno o de queratina o de sus respectivos derivados anfifílicos cuaternizados y se comparan con las obtenidas para lana tratada sólo con bisulfito sódico. The sorption of protein hydrolisates in kerat...

  15. Inducción de la brotación in vitro de microplántulas de nogal (Juglans neotropica) tratadas con Thidiazuron (TDZ) y 6-Bencilaminnopurina (BAP)

    Peña Tapia, Denisse Fabiola; Rocano Curillo, Melida Noemi; Salazar, Jazmin M.; Torres, Carlos S.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC

    2014-01-01

    El nogal (Juglans neotropica) es una especie de gran potencial para proyectos de conservación y agro-productivos en la eco-región Andina. No obstante, su baja capacidad germinativa limita su propagación para reforestación. El objetivo de este estudio fue determinar el efecto del tratamiento con Thidiazuron (TDZ) y 6-Bencilaminopurina (BAP) en la inducción in vitro de brotes de J. neotropica. Las microplántulas tratadas con BAP produjeron más brotes que aquellas tratadas con TDZ. Las microplán...

  16. Trigeminocardiac reflex by mandibular extension on rat pial microcirculation: role of nitric oxide.

    Dominga Lapi

    Full Text Available In the present study we have extended our previous findings about the effects of 10 minutes of passive mandibular extension in anesthetized Wistar rats. By prolonging the observation time to 3 hours, we showed that 10 minutes mandibular extension caused a significant reduction of the mean arterial blood pressure and heart rate respect to baseline values, which persisted up to 160 minutes after mandibular extension. These effects were accompanied by a characteristic biphasic response of pial arterioles: during mandibular extension, pial arterioles constricted and after mandibular extension dilated for the whole observation period. Interestingly, the administration of the opioid receptor antagonist naloxone abolished the vasoconstriction observed during mandibular extension, while the administration of Nω-Nitro-L-arginine methyl ester, a nitric oxide synthase inhibitor, abolished the vasodilation observed after mandibular extension. Either drug did not affect the reduction of mean arterial blood pressure and heart rate induced by mandibular extension. By qRT-PCR, we also showed that neuronal nitric oxide synthase gene expression was significantly increased compared with baseline conditions during and after mandibular extension and endothelial nitric oxide synthase gene expression markedly increased at 2 hours after mandibular extension. Finally, western blotting detected a significant increase in neuronal and endothelial nitric oxide synthase protein expression. In conclusion mandibular extension caused complex effects on pial microcirculation involving opioid receptor activation and nitric oxide release by both neurons and endothelial vascular cells at different times.

  17. High condylectomy for the treatment of mandibular condylar hyperplasia

    Ghawsi, Sodaba; Aagaard, Esben; Thygesen, Torben Henrik

    2016-01-01

    Mandibular condylar hyperplasia (MCH) is a rare, idiopathic disorder, which can cause both functional and aesthetic problems. MCH has often been described in the literature, but a comprehensive analysis of the current literature on MCH has not been undertaken. This study presents a systematic rev...

  18. Influence of mastication and edentulism on mandibular bone density.

    Chou, Hsuan-Yu; Satpute, Devesh; Müftü, Ali; Mukundan, Srinivasan; Müftü, Sinan

    2015-01-01

    The aim of this study was to demonstrate that external loading due to daily activities, including mastication, speech and involuntary open-close cycles of the jaw contributes to the internal architecture of the mandible. A bone remodelling algorithm that regulates the bone density as a function of stress and loading cycles is incorporated into finite element analysis. A three-dimensional computational model is constructed on the basis of computerised tomography (CT) images of a human mandible. Masticatory muscle activation involved during clenching is modelled by static analysis using linear optimisation. Other loading conditions are approximated by imposing mandibular flexure. The simulations predict that mandibular bone density distribution results in a tubular structure similar to what is observed in the CT images. Such bone architecture is known to provide the bone optimum strength to resist bending and torsion during mastication while reducing the bone mass. The remodelling algorithm is used to simulate the influence of edentulism on mandibular bone loss. It is shown that depending on the location and number of missing teeth, up to one-third of the mandibular bone mass can be lost due to lack of adequate mechanical stimulation.

  19. Buccal Infiltration versus Inferior Alveolar Nerve Block in Mandibular ...

    2018-04-04

    Apr 4, 2018 ... Purpose: The purpose of this study is to compare the success rates of inferior alveolar nerve block (IANB) and buccal infiltration anesthesia of mandibular second premolar with irreversible pulpitis and to evaluate the level of patient discomfort with these methods. Matherials and Methods: Forty patients, who.

  20. [Orthodontic Management of the Impacted Mandibular Second Molar Tooth].

    Mah, Michael; Takada, Kenji

    2016-09-01

    When the mandibular permanent second molar becomes impacted, it is identified as a malocclusion that needs treatment as it often leads to unwanted complications such as caries and periodontitis of the adjacent permanent first molar. Other less common complications include root resorption of the adjacent first molar root or continued root development to be in close proximity to the inferior dental alveolar nerve. This paper seeks to differentiate various levels of severity of impaction and review treatment options that are considered clinically available for the proper management of the impacted mandibular permanent second molar. Treatment options that will be discussed in this article include timing of second molar removal for replacement by the third molar, relief of impaction via second premolar removal, surgical repositioning and the combination of third molar removal, surgical exposure and orthodontic uprighting of the impacted tooth. Depending on the severity of the impaction, most impactions can be easily and predictably corrected with nickel titanium archwires or auxillary open coil springs or uprighting springs. Uncommonly, the mandibular permanent second molar can become severely impacted and in close proximity to the inferior dentoalveolar nerve. In these instances, the use of temporary anchorage devices such as microimplants has shown to be successful in uprighting the severely impacted mandibular permanent second molars. © EDP Sciences, SFODF, 2016.

  1. Middle mesial canals in mandibular molars: incidence and related factors.

    Nosrat, Ali; Deschenes, Raney J; Tordik, Patricia A; Hicks, M Lamar; Fouad, Ashraf F

    2015-01-01

    Although the internal anatomy of mandibular molars has been extensively studied, information about middle mesial (MM) canals is limited. The primary aim of this retrospective study was to evaluate the incidence of MM canals in mandibular first and second molars. The secondary aim was to correlate the incidence of MM canals with variables of molar type, sex, age, ethnicity, and presence of a second distal canal. All mature permanent first and second mandibular molars treated from August 2012 to May 2014 were included in the analysis. After completion of root canal instrumentation in all main canals, the clinician inspected the isthmus area of the mesial root using the dental operating microscope. If there was a catch point in this area with a file or explorer, the operator spent more time attempting to negotiate an MM canal. Seventy-five mandibular first and second molars were treated during the specified period. Fifteen (20%) teeth had negotiable MM canals. The incidence of MM canals was 32.1% in patients ≤ 20 years old, 23.8% in patients 21-40 years old, and 3.8% in patients > 40 years. Analysis of data revealed a significant difference in the distribution of MM canals among different age groups (P molar type, and presence of a second distal canal were not significant. The incidence of negotiable MM canals overall and their frequency of identification in younger patients were higher than in previous reports. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  2. Morphometric Analysis of Mandibular Growth in Skeletal Class III Malocclusion

    Jenny Zwei-Chieng Chang

    2006-01-01

    Conclusion: We conclude that thin-plate spline analysis and the finite element morphometric method are efficient for the localization and quantification of size and shape changes that occur during mandibular growth. Plots of maximum and minimum principal directions can provide useful information about the trends of growth changes.

  3. Acetate stimulates secretion in the rabbit mandibular gland

    Novak, I; Young, J A

    1989-01-01

    In isolated perfused rabbit mandibular glands undergoing stimulation with 0.8 microM acetylcholine, replacement of HCO3- with acetate (25 mM) increased fluid secretion by more than 100%. Other short-chain fatty acids, except for propionate, had a similar effect. We focused our further studies...

  4. Evaluation of various filling techniques in distal canals of mandibular ...

    Evaluation of various filling techniques in distal canals of mandibular molars instrumented with different single-file nickel-titanium systems. ... Comparisons between groups were applied using Student's t-test or one-way ANOVA for normally distributed data. The Mann-Whitney U-test or Kruskal-Wallis test was used when ...

  5. The application of the Risdon approach for mandibular condyle fractures.

    Nam, Seung Min; Lee, Jang Hyun; Kim, Jun Hyuk

    2013-07-06

    Many novel approaches to mandibular condyle fracture have been reported, but there is a relative lack of reports on the Risdon approach. In this study, the feasibility of the Risdon approach for condylar neck and subcondylar fractures of the mandible is demonstrated. A review of patients with mandibular condylar neck and subcondylar fractures was performed from March 2008 to June 2012. A total of 25 patients, 19 males and 6 females, had 14 condylar neck fractures and 11 subcondylar fractures. All of the cases were reduced using the Risdon approach. For subcondylar fractures, reduction and fixation with plates was done under direct vision. For condylar neck fractures, reduction and fixation was done with the aid of a trochar in adults and a percutaneous threaded Kirschner wire in children. There were no malunions or nonunions revealed in follow-up care. Mild transient neuropraxia of the marginal mandibular nerve was seen in 4 patients, which was resolved within 1-2 months. The Risdon approach is a technique for reducing the condylar neck and subcondylar fractures that is easy to perform and easy to learn. Its value in the reduction of mandibular condyle fractures should be emphasized.

  6. RADIOLOGICAL TIPS Coronal views of the paediatric mandibular ...

    imaging. None of the cases subsequently revealed any evidence of traumatic brain injury on CTB but they all demonstrated mandibular condyle fractures best appreciated on coronal views. Axial (Fig. 1) ... T Peedikayil, MB ChB. Department of Radiology, Red Cross War Memorial Children's Hospital, Cape Town.

  7. Bilateral sagittal split osteotomy versus distraction osteogenesis for mandibular advancements

    Baas, E.M.

    2015-01-01

    The aim of this thesis was to compare the treatment modality of distraction osteogenesis (DO) with the gold standard for mandibular advancement surgery. In fact we compare distraction osteogenesis with the standard of care, which is a conventional bilateral sagittal split osteotomy as described by

  8. Prevalence of three-rooted mandibular permanent first molars ...

    Comparison of the incidence and the correlations between males and females and left- and right-side occurrences were analyzed by using the Pearson chisquare test with SPSS (15.0; SPSS Inc., Chicago, IL, USA). Results: The periapical radiographs of 9 patients, 4 females and 5 males, had three-rooted mandibular first ...

  9. Combined surgical management of mandibular angle prominence and microgenia

    Portelles Masso, Ayelen Maria; Berger Kohn, Carlos

    2010-01-01

    Chin play a very important role in facial aesthetics. Different deformities of volume and of position may occur at this level and it is the microgenia one of the more frequent. Treatment options include the use of silicone, alloplasty materials and autologous bone graft. Authors report the use of the bone removed from mandibular angle to increase the chin. This is the case of a white female patient aged 18 seen by the Orthognathics Multidisciplinary Staff of 'V. I. Lenin' Hospital due to its uncommon face width. The corresponding physical examination as well as the complementary ones diagnosed a bilateral prominence of mandibular angle associated with a microgenia. Surgery carried out was of remodeling type of both mandibular angles and genioplasty of height increase and a discrete advancement using the bone removed from the gonion. There were satisfactory aesthetic results without evidence of bone reabsorption. We conclude that use of autologous graft of mandibular angle is an effective treatment alternative for correction of microgenia. (author)

  10. Mandibular trauma treatment: A comparison of two protocols

    Boffano, P.; Kommers, S.C.; Roccia, F.; Forouzanfar, T.

    2015-01-01

    Objectives: The aim of this study was to evaluate the treatment of mandibular fractures treated in two European centre in 10 years. Study Design: This study is based on 2 systematic computer-assisted databases that have continuously recorded patients hospitalized with maxillofacial fractures in two

  11. Clinical management of highly resorbed mandibular ridge without fibrous tissue

    Veeramalai N Devaki

    2012-01-01

    Full Text Available Alveolar ridge atrophy poses a clinical challenge toward the fabrication of successful prosthesis. Resorption of mandibular denture bearing areas results in unstable non-retentive dentures associated with pain and discomfort. This article describes rehabilitation procedure of a patient with resorbed ridge with maximal areas of coverage to improve support and neutral zone arrangement of teeth to improve stability of denture.

  12. Variant root morphology of third mandibular molar in normal and ...

    The mandibular third molar poses a challenge to dental surgeons due to it's unpredictable morphology which leads to increased difficulty during its extraction. The root morphology of the third molar is considered to be the most variable in the human dentition. The study aims to document these variations which will be useful ...

  13. Appearance of the mandibular incisive canal on panoramic radiographs

    Jacobs, R.; Mraiwa, N.; van Steenberghe, D.; Sanderink, G.C.H.; Quirynen, M.

    2004-01-01

    Panoramic radiographs are routinely used in the dental office for various diagnostic purposes. This study aimed to evaluate the visibility of neurovascular structures in the mandibular interforaminal region on such radiographs. Panoramic radiographs were obtained with a Cranex Tome (Soredex) from

  14. Three-dimensional analysis of mandibular growth and tooth eruption

    Krarup, S.; Darvann, Tron Andre; Larsen, Per

    2005-01-01

    Normal and abnormal jaw growth and tooth eruption are topics of great importance for several dental and medical disciplines. Thus far, clinical studies on these topics have used two-dimensional (2D) radiographic techniques. The purpose of the present study was to analyse normal mandibular growth...

  15. Microplacas de titânio em fraturas de tibiotarso em pombos domésticos Titanium microplates for treatment of tibiotarsus fractures in pigeons

    Aline Silva Gouvêa

    2011-03-01

    Full Text Available Entre os problemas cirúrgicos das aves, as fraturas são os de maior prevalência. Em virtude das variações no tamanho, peso, anatomia óssea peculiar, alta incidência de fraturas complicadas e das diferentes demandas funcionais entre espécies e indivíduos, não foi possível estabelecer ainda um método ideal de osteossíntese para os ossos longos das aves. Microplacas de titânio comumente utilizadas em cirurgias maxilofaciais de humanos foram empregadas recentemente na osteossíntese de aves, porém com poucos resultados disponíveis. O objetivo do presente estudo foi avaliar a utilização das microplacas de titânio no tratamento de fraturas experimentais de tibiotarso em pombos domésticos (Columba livia. Foram utilizadas 30 aves adultas, machos e fêmeas, com 7 meses de idade, pesando entre 400 a 500 gramas. Os animais foram separados em três grupos de dez, sendo que no grupo 1 foi utilizado uma microplaca de titânio com 6 furos e espaçador central; no grupo 2, com oito furos sem espaçador central; e, no grupo 3, com oito furos com espaçador central. Após avaliação clínica, as aves foram submetidas à osteotomia médio-diafisária no tibiotarso direito para colocação das diferentes configurações de microplaca de titânio, sendo fixadas com microparafusos de titânio com 7mm de comprimento. Os animais foram avaliados clínica e radiograficamente até os 90 dias de pós-operatório. Após esse período, foi realizada eutanásia em duas aves de cada grupo. Em todas elas, foi observada a consolidação óssea, sendo que, no grupo 1, o tempo médio e o desvio padrão foram 32,9±9,9; no grupo 2, 30,8±6,7 e, no grupo 3, 26,6±6,4 dias, não havendo diferença estatística entre os grupos. O envergamento do implante foi a complicação mais frequente. A configuração da microplaca resultou em diferença estatisticamente significativa em relação à deambulação e ao grau de envergamento nos diferentes grupos, sendo que, no

  16. Fixação esquelética externa em fratura tarsometatársica de seriema (Cariama cristata: relato de caso External skeletal fixation in tarsumetatarsus fracture of red-legged seriema (Cariama cristata: a case report

    B.B.J. Torres

    2007-02-01

    Full Text Available Uma seriema (Cariama cristata adulta foi atendida com histórico de traumatismo por tentativa de captura. A ave apresentava dificuldade de apoio do membro pélvico direito, dor à manipulação e fratura exposta do osso tarsometatarso. Optou-se pelo tratamento cirúrgico com redução fechada, utilizando-se fixador esquelético externo tipo II, com barra de conexão acrílica. A técnica cirúrgica utilizada foi satisfatória para o tratamento da fratura, possibilitando reparação óssea e retorno funcional do membro 60 dias após a cirurgia.An adult red-legged seriema (Cariama cristata was referred for examination with history of trauma by capture. The physical examination revealed lameness in the right pelvic limb, sensibility to touch and open fracture of tarsumetatarsus. The treatment was done with surgical closed reduction using a external skeletal fixator type II with acrylic connecting bar. The surgical technique applied was satisfactory for the treatment of the fracture of tarsumetatarsus, since there was bone healing and functional return of the limb at 60 days after surgery.

  17. Avaliação de seis anos de fraturas cervicais subaxiais Evaluación de seis años de fracturas cervicales subaxiales Evaluation of six years of cervical sub-axial fractures

    Leonardo Franco Pinheiro Gaia

    2013-01-01

    Full Text Available OBJETIVO: Avaliar retrospectivamente os fatores relacionados ao trauma cervical, segundo o tipo de fratura baseado na classificação AO. Levando-se em consideração aspectos etiológicos e epidemiológicos do evento. MÉTODOS: Foram analisados retrospectivamente prontuários de pacientes com fratura cervical, no período de 2004 a 2009. Estudou-se as fraturas subaxiais (C3-C7, por se enquadrarem em apenas uma classificação (AO. Usou-se radiografias frente e perfil, e tomografias para dividir as fraturas em A (compressão, B (distração e C (rotação, de acordo com o padrão apresentado. Analisou-se os seguintes parâmetros: sexo, idade, classificação AO, mecanismo de trauma, presença de déficit neurológico, e tratamento cirúrgico ou conservador. RESULTADOS: Foram analisados 264 prontuários, sendo 216 pacientes do sexo masculino e 48 femininos. A média de idade destes pacientes foi de 38,55 anos. O mecanismo de trauma mais comum das fraturas cervical subaxiais foi o acidente automobilístico com 84 casos. Quanto ao tipo de fratura pela classificação AO, a mais frequente foi do tipo B. Dos casos avaliados, 136 pacientes apresentaram déficit neurológico, parcial ou completo. O tratamento cirúrgico foi realizado em 166 casos. CONCLUSÃO: Os dados apresentados demonstram que as fraturas cervicais representam um importante problema para a saúde no Brasil, pública e privada. A prevenção das fraturas cervicais apresenta a melhor relação custo benefício na abordagem destas lesões.OBJETIVO: Evaluar retrospectivamente los factores relacionados al trauma cervical, según el tipo de fractura, basándose en la clasificación AO, considerandose los aspectos etiológicos y epidemiológicos del evento. MÉTODOS: Fueron analizadas retrospectivamente las historias clínicas de pacientes con fractura cervical, desde el 2004 hasta el 2009. Se estudiaron las fracturas subaxiales (C3-C7, ya que éstas se encuadran en apenas una clasificaci

  18. Impacted mandibular third molars and their influence on mandibular angle and condyle fractures--a retrospective study.

    Gaddipati, Rajasekhar; Ramisetty, Sudhir; Vura, Nandagopal; Kanduri, Rajeev Reddy; Gunda, Vinay Kumar

    2014-10-01

    Previous retrospective analyses prove that impacted mandibular third molars (M3s) increase the risk of angle fractures and decrease the risk of concomitant fractures to the condyle. A retrospective cohort was designed for patients reported to the Department of Oral and Maxillofacial Surgery from January 2011 till June 2013. The study variables are presence or absence of third molar, if it is present, their position, classified using the Pell and Gregory system; angulation, classified using Shiller's method. The outcome variables were angle and condyle fractures. Hospital records and panoramic radiographs were used to determine and classify these variables. The study sample comprised of 118 mandibular angle and condyle fractures in 110 patients. Database was constructed and analysed using SPSS version 10.0. This present retrospective study concluded that the presence of impacted third molar predisposes the angle to fracture and reduces the risk of a concomitant condylar fracture. However absence of impacted third molar increases the risk of condylar fracture. The highest incidence of angle fracture was observed in position A impacted mandibular third molars. And there is no significant relationship, concerning ramus position and angulation of impacted mandibular third molars with the angle fracture. Copyright © 2014 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  19. Morphometric study on mandibular foramen and incidence of accessory mandibular foramen in mandibles of south Indian population and its clinical implications in inferior alveolar nerve block.

    Shalini, R; RaviVarman, C; Manoranjitham, R; Veeramuthu, M

    2016-12-01

    The mandibular foramen is a landmark for procedures like inferior alveolar nerve block, mandibular implant treatment, and mandibular osteotomies. The present study was aimed to identify the precise location of the mandibular foramen and the incidence of accessory mandibular foramen in dry adult mandibles of South Indian population. The distance of mandibular foramen from the anterior border of the ramus, posterior border of the ramus, mandibular notch, base of the mandible, third molar, and apex of retromolar trigone was measured with a vernier caliper in 204 mandibles. The mean distance of mandibular foramen from the anterior border of ramus of mandible was 17.11±2.74 mm on the right side and 17.41±3.05 mm on the left side, from posterior border was 10.47±2.11 mm on the right side and 9.68±2.03 mm on the left side, from mandibular notch was 21.74±2.74 mm on the right side and 21.92±3.33 mm on the left side, from the base of the ramus was 22.33±3.32 mm on the right side and 25.35±4.5 mm on the left side, from the third molar tooth was 22.84±3.94 mm on the right side and 23.23±4.21 mm on the left side, from the apex of retromolar trigone was 12.27±12.13 mm on the right side and 12.13±2.35 mm on the left side. Accessory mandibular foramen was present in 32.36% of mandibles. Knowledge of location mandibular foramen is useful to the maxillofacial surgeons, oncologists and radiologists.

  20. Avaliação epidemiológica e radiológica das fraturas diafisárias do fêmur: estudo de 200 casos Epidemiological and radiological evaluation of femoral shaft fractures: study of 200 cases

    Frederico Barra de Moraes

    2009-06-01

    Full Text Available OBJETIVO: avaliar as características epidemiológicas e radiológicas dos casos de fratura diafisárias de fêmur, ocorridos de 1990 a 2005, tratados cirurgicamente no Hospital de Acidentados - Clínica Santa Isabel - de Goiânia, Goiás, com o propósito de contribuir para o melhor planejamento de medidas preventivas e terapêuticas a adotar em relação a essas fraturas. MÉTODOS: Foram avaliados retrospectivamente 200 prontuários e radiografias seriadas de pacientes com fraturas diafisárias do fêmur. Não foram incluídos os pacientes com menos de 10 anos de idade, pois o tratamento para esse grupo foi conservador. Foram descartados 25 prontuários por não fornecer todos os dados necessários ao estudo. Os pacientes foram analisados quanto ao sexo, idade, lado da fratura, exposição óssea, mecanismos de trauma, classificação das fraturas, traumas associados, tempo de consolidação e tipos de fixação cirúrgica. A análise estatística foi feita pelos testes do qui-quadrado, exato de Fisher" e t de Student, considerando significância quando p OBJECTIVE: to evaluate epidemiological and radiological characteristics of the femoral shaft fractures, surgically treated from 1990 to 2005 at Hospital de Acidentados - Clínica Santa Isabel - in Goiânia, Goiás, aiming to contribute to better preventive and therapeutic measures planning to adopt on those fractures. METHODS: 200 patients' files and x-rays with femoral shaft fractures have been retrospectively evaluated. Patients below the age of 10 years were not included because the treatment for this group was conservative. 25 files have been discarded for not supplying all the necessary data to the study. The patients were assessed for sex, age, side of the fracture, bone exposure, mechanisms of trauma, classification of the fractures, associated trauma, time for bone healing and types of surgical devices. Statistic analyses were made by chi-squared, Fisher and Student's-t tests

  1. Quedas e fraturas entre residentes de instituições de longa permanência para idosos Falls and fractures among older adults living in long-term care

    Giovâni Firpo Del Duca

    2013-03-01

    Full Text Available OBJETIVO: Investigar a ocorrência de quedas e fraturas no último ano e fatores associados entre residentes de instituições de longa permanência para idosos (ILPI. MÉTODOS: Estudo transversal exploratório, a partir de um censo realizado em ILPI localizadas em Pelotas, Rio Grande do Sul, em 2008. As quedas e fraturas decorrentes dessas foram investigadas a partir de autorrelato referente ao último ano. Sexo, idade, escolaridade, incapacidade funcional para atividades básicas da vida diária, tipo de financiamento da instituição e hospitalização no último ano foram coletados como potencias fatores associados à ocorrência de queda no último ano. Empregou-se o teste qui-quadrado para heterogeneidade e tendência linear e, na análise ajustada, a regressão de Poisson com variância robusta. RESULTADOS: Nas 24 ILPI incluídas no estudo, coletaram-se dados de 466 indivíduos. A prevalência de quedas no último ano foi de 38,9% (IC95%: 34,5 - 43,4. Dentre aqueles que caíram, as fraturas acometeram 19,2%. As fraturas mais frequentes foram: fêmur/quadril (43,3% e punho (10%. Na análise ajustada, o avanço da idade, apresentar incapacidade funcional em uma a cinco atividades da vida diária, residir em instituições públicas/filantrópicas e ter sido hospitalizado no último ano associaram-se à queda no último ano. CONCLUSÃO: A alta ocorrência de quedas e fraturas entre residentes de instituições de longa permanência para idosos revela a fragilidade da população avaliada. Atenção específica deve ser destinada a indivíduos mais velhos e hospitalizados no último ano. OBJECTIVE: To investigate the prevalence of falls and fractures over the past 12 months and associated factors among older adults living in long-term care. METHODS: Census of all long-term care located in the city of Pelotas, Brazil, in 2008. Falls over the past 12 months were assessed using the following question: "Over the last 12 months, have you fallen

  2. Efecto inmunomodulador de la solución CM-95 tratada magnéticamente en ratones Balb/c inoculados con 5-fluorouracilo

    Clara Martínez

    2011-04-01

    Full Text Available El 5-fluorouracilo es un antineoplásico usado en la terapia del cáncer y posee acción inmunosupresora al inhibir la proliferación de células del tejido hematopoyético. En este trabajo se evaluó el efecto inmunomodulador de la solución CM-95 tratada magnéticamente en ratones Balb/c inoculados con 5-fluorouracilo a través de su acción protectora rehabilitadora sobre parámetros celulares y tisulares del tejido hematopoyético. A los ratones, entre 20-22 g de peso y 6 semanas de nacidos, se les administró esta solución CM-95 tratada magnéticamente por vía intraperitoneal en un esquema de dos inoculaciones; luego se administró por la misma vía el 5_fluorouracilo a una dosis de 150 mg/m2 de superficie corporal de cada ratón. Se evaluó el conteo total y diferencial de leucocitos antes de inocular el 5-fluorouracilo, y a los tres y siete días de aplicado este. La celularidad de médula ósea y bazo y la observación microscópica del corte histológico de hígado y bazo por la técnica de inclusión en parafina y tinción con eosina hematoxilina al 10% se evaluaron a los siete días de haber aplicado el 5- fluorouracilo. La solución CM-95, tratada magnéticamente, logró modular los efectos del 5-fluorouracilo con una actividad protectora rehabiltadora, para los parámetros evaluados en médula ósea, sangre periférica, bazo e hígado. Estos resultados abren nuevas perspectivas para la aplicación del sistema acuoso tratado magnéticamente como inmunomodulador.

  3. Resolution of neurosensory deficit after mandibular orthognathic surgery: A prospective longitudinal study.

    Alolayan, Albraa Badr; Leung, Yiu Yan

    2017-05-01

    To investigate the longitudinal resolution of neurosensory deficit (NSD) and the possible risk factors that might contribute to NSD following mandibular orthognathic procedures. A prospective longitudinal observational study on patients who had mandibular orthognathic procedures was performed. Standardized neurosensory assessments were performed. The 2 years longitudinal resolution and risk factors of NSD including patients' age and gender, specific mandibular procedures and surgeons' experience were analyzed. 66 patients (44 females) with 132 sides of mandibular procedures were enrolled in the study. Surgical procedures included mandibular ramus surgery, anterior mandibular surgery, or the combination of the two. The overall occurrences of subjective NSD improved from 78.8% at postoperative 2 weeks to 13.8% at post-operative 2 years. Combinations of ramus surgery and anterior mandibular surgery increased the risk of NSD at the first three post-operative months (p orthognathic surgery. The occurrence of NSD after mandibular orthognathic procedures reduced progressively within the post-operative 2 years. Combination of mandibular ramus surgery and anterior mandibular surgery increased the risk of NSD in the early post-operative period. Copyright © 2017 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  4. Possibility of estimating three-dimensional mandibular morphology by cephalogram analysis

    Kim, S.; Motegi, Etsuko; Kikuchi, Yu; Yamaguchi, Hideharu; Takaki, Takashi; Shibahara, Takahiko

    2007-01-01

    The purpose of this study was to investigate the possibility of a surmise of three-dimensional mandibular morphology by two-dimensional cephalogram analysis. The materials were three-dimensional CT and cephalogram of 20 female mandibular prognathism patients (average age: 25.20±7.49) before there orthognathic surgery. Mandibular bone volume and sponge bone width were calculated from three-dimensional images constructed from CT images using imaging software (Real Intage, KGT inc.). There was a positive correlation (r=0.72) between mandibular volume value and mandibular ramus width. There was a positive correlation between sponge bone width at the site of the mandibular cuspid and mandibular ramus width and SNB angle (r=0.80), and between sponge bone width at the site of the mandibular molar and symphysis height and mandibular ramus width (r=0.81). It was thought that these results will be useful for a surmise of three-dimensional mandibular morphology by cephalogram analysis. (author)

  5. [Stereomodel-assisted fibula free flap harvest and mandibular reconstruction: A technical note. Literature review of CAS and CAM applied to mandibular reconstruction.

    Pauchot, J; Lachat, J; Floret, F; Badet, J-M; Tavernier, L; Aubry, S

    2013-08-05

    Mandibular reconstruction with fibula free flap harvest is currently the reference technique. Various preoperative processes have been developed to optimize this reconstruction. We report our experience with a simple, inexpensive, preoperative technique requiring a 3D printer, a device for maintaining mandibular reduction, a paper-cutting guide. Stereomodels of the mandible were obtained from computed tomography scan data and printed 3D in ABS. It allowed planning mandibular osteotomies, determine the angle between two bone fragments, and preoperatively modeling the osteosynthesis plate. A paper-cutting guide, and a simple device for maintaining mandibular reduction were also built. Two patients were operated on with this technique, with follow-up at 6 and 8 months. Reconstructions were successful with good clinical outcome in terms of mandibular contour and reconstructed segments positions. Preoperative planning of reconstruction may be used for mandibular osteotomies, fibular osteotomies, maintaining mandibular reduction, osteosynthesis, or placing implants for dental rehabilitation. The most complex procedures can virtually plan all these steps, but they are expensive and long to implement. Nevertheless, such procedures are quite expansive and require time not always compatible with carcinoma. Using a mandibular stereomodel is fast, easy, and cheap. Copyright © 2013 Elsevier Masson SAS. All rights reserved.

  6. Exposição humana a trialometanos presentes em água tratada Human exposure to trihalomethanes in drinking water

    Maria Y Tominaga

    1999-08-01

    Full Text Available Realizou-se uma revisão bibliográfica do período de 1974-1998, no MEDLINE, sobre compostos orgânicos halogenados derivados de hidrocarbonetos denominados de trialometanos. Muitos deles, reconhecidamente carcinogênicos para diferentes espécies animais, podem ser encontrados freqüentemente, inclusive entre nós, em águas tratadas e enviadas à população urbana. É o caso de compostos como o clorofórmio, bromodiclorometano, clorodibromometano e bromofórmio, resultantes da halogenação de precursores, principalmente substâncias húmicas e fúlvicas presentes na água que será tratada (clorada. Assim, descreve-se sua formação, fontes de exposição humana bem como os aspectos toxicológicos de maior importância: disposição cinética e espectro dos efeitos tóxicos (carcinogênicos, mutagênicos e teratogênicos decorrentes de exposições a longo prazo e baixas concentrações. Níveis seguros de exposição propostos são também fornecidos.Halogenated hydrocarbon compounds, some of them recognized as carcinogenic to different animal species can be found in drinking water. Chloroform, bromodichloromethane, dibromochloromethane and bromoform are the most important trihalomethanes found in potable water. They are produced in natural waters during chlorinated desinfection by the halogenation of precursors, specially humic and fulvic compounds. The review, in the MEDLINE covers the period from 1974 to 1998, presents the general aspects of the formation of trihalomethanes, sources of human exposure and their toxicological meaning for exposed organisms: toxicokinetic disposition and spectrum of toxic effects (carcinogenic, mutagenic and teratogenic.

  7. Quantificação de fatores de crescimento na pele de equinos tratada com plasma rico em plaquetas

    Maria V. de Souza

    2014-06-01

    Full Text Available O plasma rico em plaquetas (PRP é um produto derivado da centrifugação do sangue total, sendo rico em fatores bioativos, como os de crescimento. Apesar da ampla utilização em processos cicatriciais, há controvérsia sobre a eficácia da terapia na cicatrização cutânea. O objetivo desse estudo foi quantificar e comparar a concentração dos fatores TGF-β1 e PDGF-BB no PRP, plasma sanguíneo e pele, durante diferentes fases do processo de cicatrização da pele tratada ou não com PRP. Foram utilizados sete equinos machos castrados, mestiços, hígidos, com idade entre 16 e 17 (16,14±0,63 anos. Três lesões em formato quadrangular (6,25cm² foram produzidas cirurgicamente nas regiões glúteas direita e esquerda de todos os animais. Doze horas após indução das feridas, 0,5mL do PRP foi administrado em cada uma das quatro extremidades das feridas de uma das regiões glúteas (Grupo tratado = GT, escolhida aleatoriamente. A região contralateral foi utilizada como controle (GC. As feridas foram submetidas à limpeza diária com água Milli Q, e amostras foram obtidas mediante biópsias realizadas com Punch de 6mm. Foram obtidas seis biópsias de pele, sendo a primeira realizada logo após a produção da ferida (T0, e as demais com 1 (T1 2 (T2 7 (T3 e 14 (T4 dias após a indução da lesão. A sexta biópsia (T5 foi obtida após completo fechamento da pele, que ocorreu aproximadamente aos 37 dias (36,85±7,45, GC; 38,85±6,46, GT. Também foram obtidas amostras de sangue com EDTA em todos os tempos mencionados. A quantificação dos fatores de crescimento TGF-β1 e PDGF-BB na pele, PRP e plasma sanguíneo foi realizada pela técnica ELISA. Os dados foram analisados estatisticamente pelo teste t, correlação de Pearson e regressão, utilizando nível de significância de 5%. Não houve diferença entre os grupos, nos valores dos dois fatores de crescimento mensurados na pele, nos diferentes tempos. Também não houve correla

  8. Treatment of displaced mandibular condylar fracture with botulinum toxin A.

    Akbay, Ercan; Cevik, Cengiz; Damlar, Ibrahim; Altan, Ahmet

    2014-04-01

    The aim of this case report is to discuss the effect on condylar reduction of botulinum toxin A treatment used in a child with displaced fracture at condylar neck of mandible. A 3-years old boy was admitted to our clinic for incomplete fracture of mandibular symphysis and displaced condylar fracture at the left side. An asymmetrical occlusal splint with intermaxillary fixation was used instead of open reduction and internal fixation because of incomplete fracture of symphysis and possible complications of condyle surgery. However, it was observed that condylar angulation persisted despite this procedure. Thus, botulinum toxin A was administered to masseter, temporalis and pterygoideus medialis muscles. At the end of first month, it was seen that mandibular condyle was almost completely recovered and that fusion was achieved. In conclusion, Botulinum A toxin injection aiming the suppression of masticatory muscle strength facilitates the reduction in the conservative management of displaced condyle in pediatric patients. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  9. Comminuted mandibular fracture in child victim of dog bite.

    de Carvalho, Matheus Furtado; Hardtke, Luiz Augusto Paixão; de Souza, Max Filipe Cota; de Oliveira Araujo, Vasco

    2012-08-01

    Dog bites represent lesions commonly found in Hospital Emergency Clinic. This type of lesion may cause severe harm to patients, but it rarely affects the underlying bone structure causes facial fracture. This study aims to illustrate a rare clinical case in which a pediatric patient presented a comminuted fracture in the mandible which evolved into a unilateral avulsion of the mandibular condyle, body fractures as well as a mandibular ramus and hemiface that had been deformed, with multiple lacerations and loss of soft-tissue mass. Intermaxillary fixation was performed using the Ivy method, followed by internal rigid fixation using miniplates and screws in attempt to reconstruct the child's mandible. After 2 years of follow-up, a satisfactory esthetics and functional results could be observed. © 2011 John Wiley & Sons A/S.

  10. Conservative orthodontic treatment of mandibular bilateral condyle fracture.

    Gašpar, Goran; Brakus, Ivan; Kovačić, Ivan

    2014-09-01

    Maxillofacial trauma is rare in children younger than the age of 5 years (range 0.6%-1.2%), and they can require different clinical treatment strategies compared with fractures in the adult population because of concerns regarding mandibular growth and development of dentition. A 5-year-old girl with a history of falling from a bicycle 7 hours earlier was referred to the department of oral and maxillofacial surgery. Multislice computed tomographic examination demonstrated a bilateral fracture of the mandibular condyle neck associated with minimal fracture of the alveolar ridge of the maxilla. The multislice computed tomographic scan also demonstrated dislocation on the right condyle neck and, on the left side, a medial inclination of approximately 45 degrees associated with greenstick fracture of the right parasymphysis region. In this particular case, orthodontic rubber elastics in combination with fixed orthodontic brackets provided good results in the treatment of bilateral condyle neck fractures associated with greenstick fracture of parasymphysis.

  11. Patients' Priorities and Attitudes Towards Their Temporo-Mandibular Disorders.

    Kelleher, Martin; Ray-Chaudhuri, Arijit; Khawaja, Noman

    2015-08-01

    The diagnosis and appropriate management of temporo-mandibular disorders (TMDs) remains controversial. Current scientific evidence highlights the importance of psychosocial factors in sufferers and the reducing emphasis on occlusal or dental/prosthetic factors. This paper describes the findings of a survey of 211 patients reporting pain from their temporo-mandibular joint area and associated structures. This article offers busy primary dental care practitioners a cost effective questionnaire for obtaining relevant information from patients about the history of their condition and highlights what patients hope to achieve through the management of their disorder. It also emphasises the importance of communicating effectively with patients and offers practical tips for the management of TMDs in primary care.

  12. Functional anatomy of the temporo-mandibular joint (II).

    Sava, Anca; Scutariu, Monica

    2012-01-01

    Jaw movement is analyzed as an action between two rigid components jointed together in a particular way, the movable mandible against the stabilized cranium. Opening and closing movements are symmetrical; that is, both sides of the cranio-mandibular articulation are making the same movements. Protrusive and retrusive movements may also be symmetrical. The mandibular muscles determine all the complicated postures and-movements of the jaw. Their behavior can be greatly clarified by restating certain fundamentals crucial to purposive muscular activity. The joint derives its arterial supply from the superficial temporal artery and the maxillary artery. Branches of the auriculo-temporal and masseteric nerves and postganglionic sympathetic nerves supply the tissues associated with the capsular ligament and the looser posterior bilaminar extension of the disc.

  13. [Mandibular advancement devices in the treatment of obstructive sleep apnea].

    Korczyński, Piotr; Górska, Katarzyna; Wilk, Krzysztof; Bielicki, Piotr; Byśkiniewicz, Krzysztof; Baczkowski, Tadeusz

    2004-12-01

    Obstructive sleep apnea (OSA) affects approximately 450,000 people in Poland. Use of nasal continuous positive airway pressure (nCPAP) devices and laryngeal surgery are widely accepted OSA treatment methods. In 1995 ASDA approved oral devices for treatment of OSA patients. The aim of the study was to determine efficiency of mandibular advancement devices (MAD) in OSA therapy. The study group included 20 patients with OSA, all of whom did not tolerate nCPAP and did not have indications or did not agree for surgical treatment. Control polysomnography was carried out in 11 patients using MAD. In 64% of patients AHI was lower then 10. No correlation between MAD use and AHI values was found. 45% of patients declared improvement of sleep quality and life comfort. Use of mandibular advancement devices is an important alternative therapy of OSA.

  14. Assessment of a method for the prediction of mandibular rotation.

    Lee, R S; Daniel, F J; Swartz, M; Baumrind, S; Korn, E L

    1987-05-01

    A new method to predict mandibular rotation developed by Skieller and co-workers on a sample of 21 implant subjects with extreme growth patterns has been tested against an alternative sample of 25 implant patients with generally similar mean values, but with less extreme facial patterns. The method, which had been highly successful in retrospectively predicting changes in the sample of extreme subjects, was much less successful in predicting individual patterns of mandibular rotation in the new, less extreme sample. The observation of a large difference in the strength of the predictions for these two samples, even though their mean values were quite similar, should serve to increase our awareness of the complexity of the problem of predicting growth patterns in individual cases.

  15. [Longitudinal genetic effects on mandibular position of female twins from six to twelve years old].

    Zhu, Chang-feng; Peng, Jing

    2013-06-01

    To find the longitudinal genetic effects on mandibular position in mixed dentition. The sample used in this study consisted of lateral cephalograms of eighty-nine pairs of female twins in Beijing. With a mixed longitudinal method, the effective twins were 183 pairs(monozygous 110 pairs and dizygous 73 ones). The genetic and environmental effects on mandibular position were analyzed by statistical methods in female twins from six to twelve years old. Statistical comparisons revealed significant (Pchin is the most subjective to environment change, then the mandibular angle, and the condyle is the least. Using N and S as references, the environmental influence on heights showed different order from the most to least changeable: The mandibular angle, the condyle and the chin. In later stage of our observation, the mandibular morphology and growth type might be family inherited. For environmental influences plays important roles on mandibular position, these findings can be used in orthodontic treatment planning.

  16. The effects of Mandibular Osteotomy on articulation and resonance

    Delsa Geffen

    1978-11-01

    Full Text Available Pre- and post-operative speech samples were studied in nine adult cases who received Mandibular Osteotomy. Lateral cephalograms were taken during sustained production of selected sounds and trained listeners judged recordings. In most cases there was an improvement in the general quality of the speech. Considering that the functional  relationships between the speech organs had altered, it would appear that some form of adaptation by the speaker had in fact taken place.

  17. Application of biodegradable plates for treating pediatric mandibular fractures.

    An, Jingang; Jia, Pengcheng; Zhang, Yi; Gong, Xi; Han, Xiaodong; He, Yang

    2015-05-01

    We assessed the clinical results of a biodegradable plate system for the internal fixation of mandibular fractures in children, and observed the imaging features of fracture healing and bone changes around the biodegradable plates and screws during follow-up. We enrolled 39 patients (22 male, 17 female, average age 4 years 10 months) with different mandibular fractures. We used 2.0-mm resorbable plates to repair the fractures. Postoperative follow-up ranged from 6 months to 5 years; average follow-up was 1 year 2 months. The outcome measures identified and assessed included facial symmetry, mouth opening, occlusal relationship, infection, nonunion, malunion, and plate dehiscence. We fixed 42 fractures with 43 resorbable plates; the fracture site of one patient (aged 11 years 3 months) was fixed with two plates. Two patients developed small fistulas at the intraoral incision 2 months after surgery; the fistulas healed after 1 month without special treatment. In the other patients, the incision healed well, there was facial symmetry, mouth opening was >35 mm, and occlusion was good. Follow-up computed tomography examination data were available for 20 cases, and revealed different degrees of radiolucency indicating that osteolysis had occurred. Radiolucency was observed around the resorbable plates 1 month after the surgery. The extent and depth of the radiolucent region were obvious within 1 year of surgery. In the second year, there were obvious repairs, with the bony defect areas becoming shallower. After 2 years, the bony defect areas had almost disappeared. Biodegradable fixation devices are safe and efficient for treating pediatric mandibular fractures. Osteolysis commonly follows biodegradable fixation of pediatric mandibular fractures, and has no adverse effect on fracture healing. Copyright © 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  18. Fixation of zygomatic and mandibular fractures with biodegradable plates.

    Degala, Saikrishna; Shetty, Sujeeth; Ramya, S

    2013-01-01

    In this prospective study, 13 randomly selected patients underwent treatment for zygomatic-complex fractures (2 site fractures) and mandibular fractures using 1.5 / 2 / 2.5-mm INION CPS biodegradable plates and screws. To assess the fixation of zygomatic-complex and mandibular fractures with biodegradable copolymer osteosynthesis system. In randomly selected 13 patients, zygomatic-complex and mandibular fractures were plated using resorbable plates and screws using Champy's principle. All the cases were evaluated clinically and radiologically for the type of fracture, need for the intermaxillary fixation (IMF) and its duration, duration of surgery, fixation at operation, state of reduction at operation, state of bone union after operation, anatomic reduction, paresthesia, occlusal discrepancies, soft tissue infection, immediate and late inflammatory reactions related to biodegradation process, and any need for the removal of the plates. Descriptives, Frequencies, and Chi-square test were used. In our study, the age group range was 5 to 55 years. Road traffic accidents accounted for the majority of patients six, (46.2%). Postoperative occlusal discrepancies were found in seven patients as mild to moderate, which resolved with IMF for 1-8 weeks. There were minimal complications seen and only as soft tissue infection. Use of biodegradable osteosynthesis system is a reliable alternative method for the fixation of zygomatic-complex and mandibular fractures. The biodegradable system still needs to be refined in material quality and handling to match the stability achieved with metal system. Biodegradable plates and screws is an ideal system for pediatric fractures with favorable outcome.

  19. 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.

  20. Factors contributing to the surgical retreatment of mandibular fractures

    João Gualberto de Cerqueira Luz

    2013-06-01

    Full Text Available 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.

  1. Epidemiological analysis of mandibular fractures treated in Sao Paulo, Brazil

    Kelly Marinho

    2015-10-01

    Conclusion: The treatment of mandibular fractures should be aimed at restoring the occlusion and mastication function, with surgery being the most indicated treatment, using reduction and internal fixation with the use of a plates and screws system based on the experience of the authors. Knowledge of surgical techniques and methods of reduction and fixation of fractures, and periodic monitoring allow these patients to receive the appropriate treatment.

  2. Quiste óseo aneurismático mandibular

    Denia Morales Navarro

    Full Text Available El quiste óseo aneurismático es definido como una lesión osteolítica expansiva que consiste en espacios llenos de sangre y canales divididos por tabiques de tejido conectivo, los cuales contienen tejido osteoide y células gigantes multinucleadas. El objetivo es presentar un caso clínico poco común de un quiste óseo aneurismático de la región del cuerpo mandibular. Se trata de una paciente femenina de 39 años de edad que acudió a consulta externa del Servicio de Cirugía Maxilofacial del Hospital Universitario "General Calixto García" por aumento de volumen en región mandibular derecha y dolor intenso de 1 mes de evolución. Radiográficamente se detectó un área radiolúcida unilocular de bordes bien definidos; se realizó curetaje de la cavidad, y estudio histopatológico de la lesión que informó la presencia de un quiste óseo aneurismático. Se concluye que el quiste óseo aneurismático es más común en los huesos largos y en la región del ángulo mandibular en el esqueleto facial, por lo que la presentación de este en el cuerpo mandibular resulta de interés.

  3. A case of osteomyelitis of mandibular bone in Kimura's disease

    Kinugawa, Hiroshi; Shimada, Fumihiko; Sai, Yoshikazu; Amakata, Yoshikuni; Yoshitake, Kazusada [Shiga Univ. of Medical Science, Otsu (Japan)

    1991-07-01

    We experienced a case of osteomyelitis of mandibular bone in Kimura's disease. The patient received radiation therapy to head and neck area against the same disease. Bone tissue which received radiation therapy had developed malnutrition as side effect of radiation, and osteomyelitis was induced by infection from the teeth. Even in the benign soft tissue disease like Kimura's disease, especially after radiation therapy, pathologic fracture of bone may happen due to bone damage caused by radiation. (author).

  4. A Clinical Comparison of Three Techniques of Mandibular Local Anaesthesia

    Sthitaprajna Lenka

    2014-01-01

    Conclusions: After using Gow-Gates method, it was found that the Gow-Gates technique is a highly successful alternative to the conventional inferior nerve block with regards to increased success rate, constancy of landmarks, decreased positive aspiration rate, decreased incidence of complications such as trismus, the advantage of one injection to anaesthetize a greater area supplied by the mandibular nerve, longer duration of anaesthesia and less amount of pain experienced during injection.

  5. Osteossíntese mandibular em jiboia (Boa constrictor)

    Castro, Jorge Luiz Costa; Pontíficia Universidade Católica do Paraná; Santalucia, Sérgio; Universidade Federal de Santa Maria; Pachaly, José Ricardo; Universidade Paranaense; Villanova Junior, José Ademar; Pontífica Universidade Católica do Paraná; Castro, Verônica Souza Paiva; Universidade Federal de Santa Maria; Balthazar, Daniel Almeida; Fundação RIOZOO - RJ.; Spadetti, Alex Lucas; Fundação Parque Jardim Zoológico; Souza, Wilker Nazareth; Universidade Castelo Branco; Fedullo, Luiz Paulo Luzes; Fundação RIOZOO - RJ; Raiser, Alceu Gaspar; Universidade Federal de Santa Maria

    2014-01-01

    Nowadays are observed an increase in the finding of certain wild animals in urban areas, due to environmental changes caused by deforestation and economic use of natural areas. It causes disappearance of usual prey and forces these animals, including snakes, to migrate to urban areas, becoming vulnerable to injuries caused by aggressions, car accidents and capture. Mandibular and maxillar fractures are common in many animal species, representing about 3-6% of all bone fractures in dogs and ca...

  6. A rare presentation of lipoma on mandibular mucogingival junction

    Gaurav Sharma

    2016-01-01

    Full Text Available Lipoma is the most common tumor of mesenchymal tissues of body, but its occurrence in oral cavity is infrequent. Buccal mucosa is the most common intraoral site of lipoma followed by tongue, floor of the mouth, and buccal vestibule. The involvement of mucogingival junction is rare. We present a unique case report of oral lipoma occurring on mandibular mucogingival junction with review of literature which has emphasis on differential diagnosis.

  7. Ocular Features of Cerebro-Costo-Mandibular Syndrome.

    Hameed, Zoya; Taylor, Simon; Lindfield, Dan

    2018-01-01

    Cerebro-costo-mandibular syndrome (CCMS) is a rare hereditary disorder characterized by micrognathia, posterior rib gaps, and secondary developmental delay. Patients often require ventilation and feeding support throughout life. We describe the first reported ophthalmic findings of CCMS and propose that defects in choroidal permeability lead to chronic macular edema and refractory aqueous misdirection syndrome. Here we discuss the medical and surgical management concerns of recurrent angle closure and raised intraocular pressure in a CCMS patient.

  8. Canal configuration of mandibular first premolars in an Egyptian population

    Hatem A. Alhadainy

    2013-03-01

    Full Text Available The purpose of this study was to investigate canal configuration of mandibular first premolars in an Egyptian population. Two hundred fifty human extracted mandibular first premolars were collected from Egyptian patients and a small hole in the center of the occlusal surface of each tooth was made perforating the roof of the pulp chamber. Teeth were decalcified by immersing in nitric acid and dehydrated in ascending concentrations of ethyl alcohol. A waterproof black ink was passively injected from the occlusal hole into pulp system and stained teeth were immersed in methyl salicylate solution for clearing. Standardized pictures of the cleared teeth were obtained and anatomical features of the root canal were observed. The average length of the mandibular first premolar teeth was 22.48 ± 1.74 mm, one-rooted teeth were 96.8% and the two-rooted were 3.2%. Vertucci Type I canal configuration represented the highest percentage (61.2% followed by Type V (16.4%, Type IV (13.2%, Type II (5.6% and Type III (2.8%. Vertucci Type VI canal configuration represented the lowest percentage (0.4% and a complex configuration was found in one tooth. Accessory canals were detected in 22.8% and inter-canal connections were observed in 24.8% while 54% showed apical delta. Such knowledge is clinically useful for localization and negotiation of canals of mandibular first premolar, as well as their subsequent management in Egyptian population.

  9. Treatment of sharp mandibular alveolar process with hybrid prosthesis

    Sukaedi, Sukaedi; Djulaeha, Eha

    2010-01-01

    Background: Losing posterior teeth for a long time would occasionally lead to the sharpening of alveolar process. The removable partial denture usually have problems when used during mastication, because of the pressure on the mucosa under the alveolar ridge. Purpose: The purpose of this case report was to manage patients with sharp mandibular alveolar process by wearing hybrid prosthesis with extra coronal precision attachment retention and soft liner on the surface base beneath the removabl...

  10. The mandibular angles of dry adult human mandibles from north ...

    The mandibular angles of dry adult human mandibles from north-eastern arid zone of Nigeria. EF Mbajiorgu, AU Ekanem. Abstract. (Central African Journal of Medicine: 2002 48 (1-2): 9-13). http://dx.doi.org/10.4314/cajm.v48i1.8417 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians ...

  11. Early Experience with Biodegradable Fixation of Pediatric Mandibular Fractures.

    Mazeed, Ahmed Salah; Shoeib, Mohammed Abdel-Raheem; Saied, Samia Mohammed Ahmed; Elsherbiny, Ahmed

    2015-09-01

    This clinical study aims to evaluate the stability and efficiency of biodegradable self-reinforced poly-l/dl-lactide (SR-PLDLA) plates and screws for fixation of pediatric mandibular fractures. The study included 12 patients (3-12 years old) with 14 mandibular fractures. They were treated by open reduction and internal fixation by SR-PLDLA plates and screws. Maxillomandibular fixation was maintained for 1 week postoperatively. Clinical follow-up was performed at 1 week, 6 weeks, 3 months, and 12 months postoperatively. Radiographs were done at 1 week, 3 months, and 12 months postoperatively to observe any displacement and fracture healing. All fractures healed both clinically and radiologically. No serious complications were reported in the patients. Normal occlusion was achieved in all cases. Biodegradable osteofixation of mandibular fractures offers a valuable clinical solution for pediatric patients getting the benefit of avoiding secondary surgery to remove plates, decreasing the hospital stay, further painful procedures, and psychological impact.

  12. Glycosaminoglycan synthesis in the mandibular condyle during growth adaptation.

    Kantomaa, T; Pirttiniemi, P; Tuominen, M; Poikela, A

    1994-01-01

    Condylar growth was studied after an operation simulating functional orthodontic appliances. Twenty-five rabbits underwent a surgical operation for the induction of premature synostosis to displace the glenoid fossa posteriorly during growth. Twenty-five control rabbits underwent sham operations. At the age of 15 days, 10 experimental and 10 control animals and, at the age of 20 days, 5 experimental and 5 control animals were killed. Their mandibular condyles were organ-cultured for 3 h in the presence of radiolabelled sulphur. The condyles were used for autoradiographic purposes. Digital image analysis of autoradiograms of histological sections showed synthesis of glycosaminoglycans to have increased from the anterior to the posterior direction. This increase was more marked in experimental animals than in the condyles of control animals. Ten experimental and 10 control animals were killed at the age of 15 days, and mandibular condyles were organ-cultured for 1, 4 and 7 days. Differentiation of proliferating prechondroblasts into hypertrophied chondrocytes continued under organ culture conditions. A marked decrease in the proliferating cell layer was noticed, especially in control condyles. Hypertrophy was faster and came closer to the surface of the condyle in the anterior region of the condyle. This was most marked in the condyles of experimental animals. The results indicate that a procedure carried out on the glenoid fossa with the same effect as functional appliances increases the synthesis of extracellular matrix in the posterosuperior region of the mandibular condyle.

  13. Accuracy of perioperative mandibular positions in orthognathic surgery.

    Borba, A M; Ribeiro-Junior, O; Brozoski, M A; Cé, P S; Espinosa, M M; Deboni, M C Z; Miloro, M; Naclério-Homem, M G

    2014-08-01

    Mandibular position is an important parameter used for the diagnosis of dentofacial deformities, as well as for orthognathic surgery planning and execution. Centric relation (anterior and superior relationship of the mandibular condyles interposed by the thinnest portion of their disks against the articular eminencies), centric occlusion (when lower teeth contact upper teeth at centric relation), and maximal intercuspation (complete interdigitation of lower and upper teeth) are not often addressed as factors that influence the results of orthognathic surgery, although these relationships are critical to ensure accuracy during the surgery. The present study assessed occlusal measurements taken before and after the induction of general anaesthesia from consecutive orthognathic surgery subjects. The variables assessed included the differences between these occlusal measurements, patient age, gender, type of deformity, and type of proposed orthognathic surgical procedure. The results demonstrated statistically significant differences for mandibular retrusion from maximal intercuspation to centric occlusion position, whereas the mandible appeared not to change significantly from centric occlusion after the induction of general anaesthesia. Patient age and the type of deformity appeared to influence the results. While in most instances centric occlusion can be adequately reproduced under general anaesthesia, for some specific orthognathic cases more accurate results might be obtained if the mandible-first sequence is used. Copyright © 2014 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  14. Mandibular function, temporomandibular disorders, and headache in prematurely born children.

    Paulsson, Liselotte; Ekberg, Ewacarin; Nilner, Maria; Bondemark, Lars

    2009-01-01

    To evaluate mandibular function, signs, and symptoms of temporomandibular disorders (TMDs) and headache in prematurely born 8- to 10-year-old children, and to compare the findings with matched full-term born controls. Seventy-three preterm children were selected from the Medical Birth Register--one group comprising 36 extremely preterm children born before the 29th gestational week, the other group 37 very preterm children born during gestational weeks 29 to 32. The preterm children were compared with a control group of 41 full-term children matched for gender, age, nationality, and living area. The subjective symptoms of TMD and headache were registered using a questionnaire. Mandibular function, signs, and symptoms of TMD and headache were registered. TMD diagnoses were set per Research Diagnostic Criteria for temporomandibular disorders (RDC/TMD). No significant differences between groups or gender were found for TMD diagnoses according to RDC/TMD or for headache. The preterm children had smaller mandibular movement capacity than the full-term control group, but when adjusting for weight, height, and head circumference mostly all group differences disappeared. Prematurely born children of 8 to 10 years of age did not differ from full-term born children when considering diagnoses according to RDC/TMD, signs, and symptoms of TMD or headache.

  15. 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.

  16. [Bruxism, temporo-mandibular dysfunction and botulinum toxin].

    Chikhani, L; Dichamp, J

    2003-07-01

    Tooth grinding and tooth clenching are unvoluntary mainly nocturnal habits that result in an hypertrophy of masseter and temporalis muscles with an unbalance between opening and closing muscles of the jaw and lead to an alteration of mandibular condyles movements and to hyper pressure in the temporo-mandibular joints (TMJ) which can generate severe pain. Intra muscular injections of botulinum toxin permit to restablish the balance between closing and opening muscles, to relieve pain, to treat masseteric hypertrophy with improvement of face outline and to recover a normal cinetic of temporo-mandibular joints. Moreover, botulinum toxin injections permit to quit habits of tooth grinding and clenching and one single session of injections is curative for 2/3 of the patients. There are no side effects apart from slight diffusion to superficial muscles of the face resulting in a "fixed" smile for about 6 to 8 weeks. So injections of botulinum toxin in masseter and temporalis muscles are an efficient treatment of bruxism and TMJ dysfunction, cheap with no lasting side effect.

  17. [Diagnosis and treatment of temporo-mandibular disorders in orthodontics].

    Bocquet, Emmanuelle; Moreau, Alexis; Danguy, Michel; Danguy, Chantal

    2010-03-01

    Orthodontists are fully prepared to treat the problems of occlusion that they are called upon to deal with every day. On the other hand temporo-mandibular joint disorders present more obscure difficulties from the point of view of detection and diagnosis as well the management of their treatment. That is why a profound understanding of the anatomical and physiological functioning of the temporo-mandibular joint has become indispensable for today's orthodontists who are now asked to detect and diagnose an assortment of TMJ disturbances whose etiology may vary greatly. By performing a rigorous diagnostic procedure, based on a thorough clinical examination supported by careful axiographic and radiological studies, of temporo-mandibular malfunctioning and its underlying etiological causes, which are primarily dento-alveolar and occlusal in nature, orthodontists will be able to adopt an appropriate therapeutic approach that might be purely orthodontic or multi-disciplinary and carried out with the collaboration of specialists in occlusion, oral surgery, and even osteopathy. EDP Sciences, SFODF, 2010.

  18. Prefabricated fibula free flap with dental implants for mandibular reconstruction.

    Pauchet, D; Pigot, J-L; Chabolle, F; Bach, C-A

    2018-03-02

    Free fibula transplant is routinely used for mandibular reconstruction in head and neck cancer. Dental rehabilitation, the objective of mandibular reconstruction, requires the use of dental implants as supports for fixed or removable dentures. Positioning of fibular bone grafts and implants determines implant osseointegration and the possibilities of dental rehabilitation. Prefabrication of a fibula free flap with dental implants prior to harvesting as a free flap can promote implant osseointegration. The position of the implants must then be precisely planned. Virtual surgery and computer-assisted design and prefabrication techniques are used to plan the reconstruction and then reproduce this planning by means of tailored fibula and mandible cutting guides, thereby ensuring correct positioning of fibular bone fragments and implants. The prefabricated fibula free flap technique requires two surgical procedures (prefabrication and flap transfer) and precise preoperative planning. Prefabricated fibula free flap with dental implants, by improving the quality of osseointegration of the implants before flap transfer, extends the possibilities of prosthetic rehabilitation in complex secondary mandibular reconstructions. Copyright © 2018 Elsevier Masson SAS. All rights reserved.

  19. Lingual nerve injury following surgical removal of mandibular third molar

    Abduljaleel Azad Samad

    2017-12-01

    Full Text Available Background and objective: The close proximity of lingual nerve in relation to the lingual cortical bone of the posterior mandibular third molar is clinically important because lingual nerve may be subjected to trauma during surgical removal of the impacted lower third molar. This prospective study aimed to evaluate the incidence of lingual nerve paresthesia following surgical removal of mandibular third molar in College of Dentistry, Hawler Medical University. Methods: A total of 116 third molars surgery were carried out under local anesthesia for 116 patients for removal of lower mandibular teeth Using Terence Ward's incision made in all cases, and after that, the buccal flap was reflected, lingual tissues had been retracted during bone removal with a periosteal elevator. The sensory disturbance was evaluated on the 7th postoperative day by standard questioning the patients: “Do you have any unusual feeling in your tongue, lingual gingiva and mucosa of the floor of the mouth?" Results: One patient experienced sensory disturbance, the lingual nerve paresthesia incidence was 0.9% as a transient sensory disturbance, while no patient of permanent sensory disturbance. Conclusion: The incidence of injury to the lingual nerve can be minimized by careful clinical evaluation, surgeon’s experience, surgical approach and knowledge about anatomical landmarks during surgical removal of an impacted lower third molar tooth.

  20. Association of the Mandibular Third Molar Position to the Pericoronitis

    Tsvetan Tsvetanov

    2018-02-01

    Full Text Available Introduction: Pericoronitis is inflammation of the soft tissues surrounding the crown of a partially erupted tooth. Objective: To provide measurement of lower third molar angulation and determine relationship between mandibular third molar position and presence of pericoronitis. Material and methods: We studied 104 patients with lower third molar pericoronitis with clinical manifestations and measurement of lower third molar angulation. The mean age of patients was 25.7 years (range 18-35 years. Results: In this study was used the following statistical analysis, Pearson correlation coefficient and Spearman’s correlation coefficient (nonparametric version of the Pearson correlation coefficient for measure of the linear correlation between two variables - pericoronitis and angulation of the lower third molars. The chi-square test was used to assesses case incidences. The level of significance was p<0.05. 36.04% of partially impacted mandibular third molars were mesioangular followed by the vertical (25.47%, horizontal (18.97%, distoangular (9.21%, buccal (5.42% and lingual (3.79% position. The lowest part of the mandibular third molars is located in the ramus of mandible (1.08%. The present study was found in relation to mesioangular, distoangular, vertical impaction and pericoronitis (p<0.05. Conclusion: We conclude that the position of lower third molar may be able to be associated with presence of pericoronitis.

  1. Endoscopically assisted enucleation of a large mandibular periapical cyst.

    Nestal Zibo, Heleia; Miller, Ene

    2011-01-01

    Enucleation of large cysts in the jaws is an invasive method that might be associated with complications. Marsupialization is a less invasive alternative method but it involves a prolonged and uncomfortable healing period. This study addresses a contemporaneous and less invasive surgical technique for treating larger mandibular cysts. MATERIALS AND METHODS. A 48-year-old woman presented with a large mandibular apical cyst involving the left parasymphysis, body, ramus and condylar neck, with involvement of the alveolar inferior nerve. The cystic lesion was enucleated using a 30° 4.0 mm endoscopic scope and endoscopic instruments through two small accesses: the ostectomy site of previously performed marsupialization and the alveolus of the involved third molar extracted of the time of the enucleation of the cyst. RESULTS. The endoscopic scope provided good visualization of the whole cystic cavity allowing the removal of any residual pathologic tissue and preservation of the integrity of the involved inferior alveolar nerve. The morbidity of the surgical procedure was extremely reduced. At a 6-month follow-up the patient did not present any symptom of inflammation and a panoramic X-ray showed good bone repair and remodelation. CONCLUSIONS. Endoscopically assisted enucleation proved to be effective method of treating a large mandibular cyst, providing total enucleation with a minimal invasive technique.

  2. Number of implants for mandibular implant overdentures: a systematic review

    Lee, Jeong-Yol; Kim, Ha-Young; Bryant, S. Ross

    2012-01-01

    PURPOSE The aim of this systematic review is to address treatment outcomes of Mandibular implant overdentures relative to implant survival rate, maintenance and complications, and patient satisfaction. MATERIALS AND METHODS A systematic literature search was conducted by a PubMed search strategy and hand-searching of relevant journals from included studies. Randomized Clinical Trials (RCT) and comparative clinical trial studies on mandibular implant overdentures until August, 2010 were selected. Eleven studies from 1098 studies were finally selected and data were analyzed relative to number of implants. RESULTS Six studies presented the data of the implant survival rate which ranged from 95% to 100% for 2 and 4 implant group and from 81.8% to 96.1% for 1 and 2 implant group. One study, which statistically compared implant survival rate showed no significant differences relative to the number of implants. The most common type of prosthetic maintenance and complications were replacement or reattaching of loose clips for 2 and 4 implant group, and denture repair due to the fracture around an implant for 1 and 2 implant groups. Most studies showed no significant differences in the rate of prosthetic maintenance and complication, and patient satisfaction regardless the number of implants. CONCLUSION The implant survival rate of mandibular overdentures is high regardless of the number of implants. Denture maintenance is likely not inflenced substantially by the number of implants and patient satisfaction is typically high again regardless os the number of implants. PMID:23236572

  3. Management of mandibular body fractures in pediatric patients: A case report with review of literature

    Baby John; Reena R John; A Stalin; Indumathi Elango

    2010-01-01

    Mandibular fractures are relatively less frequent in children when compared to adults, which may be due to the child's protected anatomic features and infrequent exposure of children to alcohol related traffic accidents. Treatment principles of mandibular fractures differ from that of adults due to concerns regarding mandibular growth and development of dentition. A case of a 4.5-year-old boy with fractured body of mandible managed by closed reduction using open occlusal acrylic splint and ci...

  4. Efectos de los aparatos propulsores mandibulares fijos en la articulación temporomandibular

    Palomino-Gómez, Sandra Patricia [UNESP; Almeida, Kélei Mathias [UNESP; Melllo, Patricia Bicalho de [UNESP; Restrepo, Manuel [UNESP; Raveli, Dirceu Barnabé [UNESP

    2014-01-01

    Fixed mandibular propulsion appliances are an alternative for the treatment of Class II malocclusion in individuals with mandibular deficiency. Since they are fixed appliances, said devices keep the mandible in an anterior-forced position during rest and during all mandibular functions. When a propulsive appliance is used, the lower jaw is displaced forward and downward. This movement leads to a new position of the condyle, which can, ultimately affect the normal functioning of the temporoman...

  5. Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation

    Rodrigues, Clarissa Teles; de Oliveira-Santos, Christiano; Bernardineli, Norberti; Duarte, Marco Antonio Hungaro; Bramante, Clovis Monteiro; Minotti-Bonfante, Paloma Gagliardi; Ordinola-Zapata, Ronald

    2016-01-01

    ABSTRACT The knowledge of the internal anatomy of three-rooted mandibular molars may help clinicians to diagnose and plan the root canal treatment in order to provide adequate therapy when this variation is present. Objectives: To determine the prevalence of three-rooted mandibular molars in a Brazilian population using cone beam computed tomography (CBCT) and to analyze the anatomy of mandibular first molars with three roots through micro-CT. Material and Methods: CBCT images of 116 patien...

  6. 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.

  7. Prolonged vertigo and ataxia after mandibular nerve block for treatment of trigeminal neuralgia

    Arvind Chaturvedi; H H Dash

    2011-01-01

    Common complications of neurolytic mandibular nerve block are hypoesthesia, dysesthesia, and chemical neuritis. We report a rare complication, prolonged severe vertigo and ataxia, after neurolytic mandibular blockade in a patient suffering from trigeminal neuralgia. Coronoid approach was used for right sided mandibular block. After successful test injection with local anesthetic, absolute alcohol was given for neurolytic block. Immediately after alcohol injection, patient developed nausea and...

  8. Dislocation of a mandibular condyle in the middle cranial fossa, diagnosed 54 years after trauma

    De Mol, Antoni; Nicolielo, Laura; Ghekiere, Olivier; Jacobs, Reinhilde; Politis, Constantinus

    2017-01-01

    Abstract Dislocation of the mandibular condyle into the middle cranial fossa is a rare complication of mandibular trauma. We report the remarkable case of a 63-year-old patient in whom trauma 54 years prior to consultation resulted in intrusion of the right mandibular condyle into the middle cranial fossa. The diagnosis was missed because of insufficient data provided by conventional radiographies. Failure of timely diagnosis and lack of appropriate treatment resulted in temporomandibular joi...

  9. Lesão oculta da articulação manúbrio-esternal associada à fratura da coluna torácica Occult manubriosternal joint injury associated with fracture of the thoracic spine

    Carlos Fernando Pereira da Silva Herrero

    2011-04-01

    Full Text Available Os autores relatam a ocorrência de lesão oculta da articulação manúbrio-esternal na avaliação inicial de um paciente com fratura da coluna torácica (T9. Foi diagnosticada fratura de T9 no paciente do sexo masculino de 37 anos de idade associada a déficit neurológico parcial. No atendimento inicial, as radiografias realizadas não demonstraram a lesão da articulação manúbrioesternal. Durante a reabilitação, após a estabilização cirúrgica da fratura da coluna torácica, subitamente o paciente sentiu dor intensa, acompanhada de deformidade ao nível do esterno, tendo sido diagnosticada luxação manúbrio-esternal nos exames de imagem. Devido à recidiva da luxação e de dor incapacitante, foi necessária a realização da redução aberta e fixação da articulação manúbrio-esternal. Na avaliação após 12 meses, o paciente apresentou recuperação completa da lesão neurológica, consolidação da artrodese do segmento vertebral T7-T11, e manutenção da redução da articulação manúbrio-esternal, que era assintomática durante a realização das atividades cotidianas.The authors report the occurrence of an occult manubriosternal joint injury in the initial evaluation on a patient with a thoracic spine fracture (T9. This T9 fracture was diagnosed in a 37-year-old man and was associated with a partial neurological deficit. At the initial evaluation, the radiographs produced did not show the manubriosternal joint injury. During rehabilitation, after surgical stabilization of the thoracic spine fracture, the patient suddenly felt an intense pain accompanied by deformation at the sternal level. From imaging examinations, manubriosternal dislocation was diagnosed. Because of recurrence of the dislocation and the incapacitating pain, open reduction and fixation of the manubriosternal joint had to be performed. At the 12-month follow-up, the patient presented complete recovery of the neurological lesion, consolidation of the

  10. Uso de medicamentos como fator de risco para fratura grave decorrente de queda em idosos Medication as a risk factor for falls resulting in severe fractures in the elderly

    Evandro da Silva Freire Coutinho

    2002-10-01

    Full Text Available Quedas seguidas de fraturas entre idosos constituem um importante problema de saúde pública. Um estudo caso-controle foi conduzido para avaliar o papel do uso de um conjunto de medicamentos, como fator de risco para esses acidentes entre pessoas com 60 anos ou mais, na cidade do Rio de Janeiro, Brasil. Cento e sessenta e nove casos de internação por fratura conseqüente a queda, e 315 controles hospitalares foram pareados por idade, sexo e hospital. Odds ratios (OR, ajustados por fatores potenciais de confusão, foram obtidos utilizando-se regressão logística condicional. Observou-se um aumento no risco desses acidentes para o uso de drogas bloqueadoras dos canais de cálcio (OR = 1,96, 1,16-3,30 e benzodiazepínicos (OR = 2,09, 1,08-4,05, e uma redução para o uso de diuréticos (OR = 0,40, 0,20-0,80. Antiácidos, digitálicos e laxantes mostraram-se associados a uma redução do risco de fraturas por quedas, cuja significância estatística atingiu níveis limítrofes (0,05 Falls leading to fractures among the elderly are a major public problem. A case-control study was conducted on the use of certain drugs as a risk factor for hospitalization due to fractures after falls among individuals aged 60 years or over in the city of Rio de Janeiro, Brazil. One hundred sixty-nine cases and 315 in-patient controls were matched by age, sex, and hospital. Odds ratios (OR adjusted for potential confounders were calculated using conditional logistic regression. Increased risk of such accidents was found for calcium channel antagonists (OR = 1.96, 1.16-3.30 and benzodiazepines (OR = 2.09, 1.08-4.05, and decreased risk was associated with diuretics (OR = 0.40, 0.20-0.80. Antacids, digitalis, and laxatives were associated with reduced risk of fractures after falls that reached borderline statistical significance (0.05 < p < 0.10. The findings highlight the need to weigh risks and benefits of medication in the elderly. It is also important to advise

  11. Fraturas supracondilares tipo III do úmero em crianças: tratamento com braço reto Type III supracondylar fractures of the humerus in children: straight-arm treatment

    Jamish Gandhi

    2010-01-01

    Full Text Available INTRODUÇÃO: As fraturas supracondilares de Gartland tipo III são as lesões comuns em crianças. Apresentamos um método de redução manipulativa, imobilização e fixação usando gesso-de-Paris, com o cotovelo em extensão total (braço reto. MÉTODO: Estudo retrospectivo analisando todos os pacientes com fraturas supracondilares de Gartland tipo III no Wellington Public Hospital, durante o período de fevereiro de 1999 a março de 2007. Os sete pacientes foram tratados pela técnica do braço reto, e os desfechos clínicos foram revisados neste estudo. RESULTADO: Todos os pais ficaram satisfeitos com os resultados. Usando os critérios de Flynn,6 seis pacientes atingiram excelentes resultados e um teve resultado bom quando se analisou o ângulo de alinhamento. Ao verificar a amplitude de movimento, quatro pacientes tiveram resultados bons, um moderado e dois, ruim. CONCLUSÃO: O tratamento com braço reto das fraturas supracondilares de Gartland tipo III parece ser uma alternativa não-invasiva e segura da fixação com fio K.OBJECTIVE: Gartland type III supracondylar fractures are a common injury in children. We present a method of manipulative reduction, immobilization and fixation using Plaster of Paris with the elbow in full extension (straight-arm. METHOD: Retrospective study analyzing all patients with Gartland type III supracondylar fractures at the Wellington Public Hospital during the period from February 1999 to March 2007. The seven patients had been treated with the straight-arm technique, and the clinical outcomes are reviewed in this study. RESULT: All the parents were satisfied with the results. Using the Flynn criteria6, six patients achieved excellent results and one good, in relation to the carrying angle. With regard to the range of motion, four patients had good results, one fair, and two poor. CONCLUSION: Straight-arm treatment of Gartland type III supracondylar fractures appears to be a non-invasive and safe

  12. Características epidemiológicas e causas da fratura do terço proximal do fêmur em idosos Epidemiological characteristics and causes of proximal femoral fractures among the elderly

    José Soares Hungria Neto

    2011-01-01

    Full Text Available OBJETIVO: O custo social e econômico das fraturas da região proximal do fêmur é elevado e decorre, dentre outros fatores, da morbimortalidade da própria fratura. Apesar de sua importância, estudos envolvendo esse tema ainda são escassos no Brasil. Esse foi um estudo retrospectivo, observacional, transversal (ecológico com objetivo de traçar um perfil epidemiológico da fratura do terço proximal do fêmur em idosos, analisar suas causas e as características físicas dos pacientes admitidos em um único hospital universitário de São Paulo. MÉTODOS: Estudo de prontuários no período de um ano e comparação dos grupos pelo teste do Qui-quadrado; p OBJECTIVE: The social and economic cost of proximal femoral fractures is high, due the morbidity and mortality relating to the fracture itself, among other factors. Despite the importance of this issue, studies on this topic are still scarce in Brazil. This was a retrospective, observational and cross-sectional (ecological study with the aims of outlining an epidemiological profile for proximal femoral fractures among the elderly and analyzing the causes of these fractures and the physical characteristics of patients admitted to a single university hospital in São Paulo. METHODS: This was a study on medical records over a one-year period, with group comparisons using the chi-square test; p < 0.05 was considered significant. RESULTS: Ninety-four individuals were evaluated: predominantly female (2:1; 81-85 years of age; body mass index within normal limits; white and Asian patients (p < 0.05. The vast majority of the fractures occurred through low-energy trauma and inside the patients' homes (p < 0.05. After excluding the trauma resulting from high-energy events, over 39% occurred as the patients were moving from sitting to standing up or were using stairs, and approximately 40% occurred while they were standing still or walking. A greater number of cases corresponded to the cold seasons of

  13. Influência do componente protéico na consolidação de fraturas: trabalho experimental em ratos Influence of the protein component upon fracture healing: an experimental study in rats

    Roberto Guarniero

    2003-12-01

    Full Text Available Os autores estudaram a influência da nutrição protéica na consolidação de fraturas em 40 ratos Lewis divididos em 4 grupos de 10. Durante 6 semanas os grupos 1, 2 e 3 receberam respectivamente dietas com 0, 19% e 36% de proteínas. O grupo 4 recebeu dieta sem proteínas durante as 2 primeiras semanas e com 36% de proteínas nas 4 semanas seguintes. Foram realizadas fraturas nas tíbias esquerdas ao final de 2 semanas e após 4 semanas das fraturas os animais foram sacrificados para estudo dos calos ósseos. Para a avaliação dos resultados foram utilizadas medidas clínicas, bioquímicas, radiográficas, densitométricas, e histomorfométricas. Concluiu-se que a dieta hiperprotéica alterou a consolidação óssea produzindo um calo maior e mais resistente, mas não alterou a qualidade em concentração de cálcio e em porcentagem a quantidade de tecido ósseo.The authors investigated the influence of a protein diet on fracture healing in 40 Lewis rats divided into four groups of ten. During 6 weeks, Groups 1, 2 and 3 were fed diets containing, respectively, 0.19% and 36% protein. Group 4 was fed a proteinless diet during the first two weeks and a 36%-protein diet during the next 4 weeks. At two weeks, fractures were performed in the left tibias; all animals were killed 4 weeks later so that the bone calluses could be investigated. Clinical, biochemical, radiographic, densitometry and histomorphometry measurements were performed to evaluate the findings. The conclusion was that the hyperprotein diet altered bone healing by producing a larger, more resistant callus, although it did not change quality as regards calcium levels and the percentage amount of bone tissue.

  14. Avaliação do efeito do Risedronato Sódico na consolidação de fraturas: estudo experimental em ratos The evaluation of the Sodic Risedronate effect in the fractures consolidation: experimental study with rats

    Luiz Antonio Alcântara de Oliveira

    2004-06-01

    Full Text Available Realizou-se um estudo experimental com 40 ratos da raça Lewis visando-se avaliar a influência do risedronato sódico na consolidação de fraturas em animais submetidos à dieta aprotéica e dieta protéica, divididos aleatoriamente em quatro grupos, com 10 animais em cada grupo, assim constituídos: grupo I, com dieta protéica, sem risedronato (grupo controle; grupo II, dieta protéica, com risedronato; grupo III, dieta aprotéica, sem risedrionato; grupo IV, dieta aprotéica, com risedronato. Os ratos foram submetidos a fraturas semelhantes, no 15º dia e à eutanásia no 43º dia do experimento. As variáveis analisadas incluíram a evolução ponderal, avaliação radiográfica, densitometria óssea, avaliação histomorfométrica do calo ósseo, dosagens sanguíneas de cálcio, fósforo, fosfatase alcalina, proteínas totais, albumina e osteocalcina. Concluiu-se que o risedronato exerceu influência positiva no processo de consolidação de fraturas em ratos nutridos e desnutridos, e aumentou a densidade mineral óssea. O risedronato ocasionou a formação de tecido ósseo maduro de melhor qualidade e morfologia.A experimental study with 40 rats of the Lewis type was done focusing the influence of sodic risedronate on fractures consolidation in the animals. They were submitted to a protein nutrition diet to a non-protein one, divided randomly in four groups, having 10 animals in each group. Like this: group 1, with a protein nutrition diet, without risedronate (control group; group II, protein nutrition diet t with risedronate , group III, non-protein diet, without risedronate; group IV, non-protein diet with risedronate. The rats were submitted to similar fractures, on the 15º day and to the euthanasia on the 43º of the experiment. The variability analyzed included the ponderous evaluation, radiographic evaluation, the bone densitometry, histomorphometric bone callus evaluation, blood dosage of calcium, phosphorus, alkaline

  15. Maxillary palatal ramp prosthesis: A prosthodontic solution to manage mandibular deviation following surgery

    Sampa Ray (Bhattacharya

    2015-01-01

    Full Text Available Mandibular resection following surgical treatment for neoplastic lesions of the oral cavity leads to numerous complications including altered mandibular movements, disfigurement, difficult in swallowing, impaired speech and articulation, and deviation of the mandible towards the resected site. Various prosthetic methods are employed to reduce or minimize mandibular deviation and improve and restore the lost functions and esthetic, like maxillomandibular fixation, implant supported prosthesis, removable mandibular guide flange prosthesis, and palatal based guidance restoration. This clinical report describes the rehabilitation of a patient following segmental mandibulectomy using palatal ramp prosthesis.

  16. Mandibular third molar development after mantle radiation in long-term survivors of childhood Hodgkin's disease

    McGinnis, J.P. Jr.; Hopkins, K.P.; Thompson, E.I.; Hustu, H.O.

    1987-01-01

    Sequential panoramic radiographs were assessed for mandibular third molar development in 47 long-term survivors of childhood Hodgkin's disease after treatment with 37 Gy mantle field radiation. To make a comparison, panoramic radiographs of 149 healthy, nonirradiated children were reviewed for the presence of mandibular third molars. In children between the ages of 7 and 12 years, bilateral agenesis of mandibular third molars was more frequent in patients who had been treated with mantle radiation than in nonirradiated patients. Unilateral agenesis, crown hypoplasia, and root growth impairment of mandibular third molars were also found. Similar, apparent, radiation-induced developmental anomalies were noted in maxillary third molars of the irradiated patients

  17. Mandibular Symmetrical Bilateral Canine-Lateral Incisors Transposition: Its Early Diagnosis and Treatment Considerations

    Yehoshua Shapira

    2016-01-01

    Full Text Available Bilateral mandibular tooth transposition is a relatively rare dental anomaly caused by distal migration of the mandibular lateral incisors and can be detected in the early mixed dentition by radiographic examination. Early diagnosis and interceptive intervention may reduce the risk of possible transposition between the mandibular canine and lateral incisor. This report illustrates the orthodontic management of bilateral mandibular canine-lateral incisor transposition. Correct positioning of the affected teeth was achieved on the left side while teeth on the right side were aligned in their transposed position. It demonstrates the outcome of good alignment of the teeth in the dental arch.

  18. Mandibular Symmetrical Bilateral Canine-Lateral Incisors Transposition: Its Early Diagnosis and Treatment Considerations.

    Shapira, Yehoshua; Finkelstein, Tamar; Kadry, Rana; Schonberger, Shirley; Shpack, Nir

    2016-01-01

    Bilateral mandibular tooth transposition is a relatively rare dental anomaly caused by distal migration of the mandibular lateral incisors and can be detected in the early mixed dentition by radiographic examination. Early diagnosis and interceptive intervention may reduce the risk of possible transposition between the mandibular canine and lateral incisor. This report illustrates the orthodontic management of bilateral mandibular canine-lateral incisor transposition. Correct positioning of the affected teeth was achieved on the left side while teeth on the right side were aligned in their transposed position. It demonstrates the outcome of good alignment of the teeth in the dental arch.

  19. Use of a single implant to retain mandibular overdenture: A preliminary clinical trial of 13 cases

    Tao Cheng

    2012-09-01

    Conclusion: Within the limitations of this preliminary prospective clinical study, single-implant-supported mandibular overdentures were a successful alternative treatment option for elderly edentulous patients.

  20. Surgical Management of Mandibular Central Incisors with Dumbbell Shaped Periapical Lesion: A Case Report

    Roopadevi Garlapati

    2014-01-01

    Full Text Available Dental traumatic injuries may affect the teeth and alveolar bone directly or indirectly. Pulpal necrosis and chronic and apical periodontitis with cystic changes are the most common sequelae of the dental traumatic injuries, if the teeth are not treated immediately. This case report focuses on the conventional and surgical management of mandibular central incisors. A twenty-four-year-old male patient presented with pain in the mandibular central incisors. Radiographic examination revealed mandibular central incisors with dumbbell shaped periapical lesion. After root canal treatment, parendodontic surgery was performed for mandibular central incisors. After one-year recall examination, the teeth were asymptomatic and periapical lesion had healed.

  1. Distracción mandibular y articulación temporomandibular Mandibular distraction and the temporomandibular joint

    F. Monje Gil

    2004-08-01

    Full Text Available Los pacientes con deformidades craneofaciales requieren generalmente multiples y, a veces, complejos procedimientos quirurgicos para reconstruir tejidos blandos y duros alterados. Un avance importante en cirugía reconstructiva es el alargamiento de la mandibula por distracción que tiene la ventaja de una cirugía menos agresiva que determinados tipos de osteotomías. Con esta técnica una osteotomía bicortical se hace en distintas zonas de la mandibula colocandose el distractor hasta alcanzar los efectos deseados. Aunque las fuerzas aplicadas se han mostrado eficaces para alargar la mandíbula, sus efectos en segmentos proximales y distales, incluyendo la articulación temporomandibular no han sido analizados sistemáticamente. En este artículo se repasa trabajos experimentales y clínicos en los que se detalla la relación entre distracción mandibular y articulación temporomandibular.Abstract: Patients with severe craniofacial abnormalities often require multiple and complex surgical procedures to reconstruct maldeveloped hard and soft tissues of the maxillofacial complex. An important advance in reconstructive surgery is mandibular lengthening by gradual distraction, which takes advantage to be less agressive surgery than some osteotomies. With this technique, a bicortical osteotomy is made at the angle of the deficient mandible, and an expansion appliance is placed across the osteotomy line. Although the applied forces have been shown to lengthen the mandible effectively in the region of the application, their effects on the proximal and distal mandibular segments, including the temporomandibular joint region, have not been analyzed systematically. In this article, we study several experimental and clinical papers where it describes the relationship between mandibular distraction and temporomandibular joint.

  2. Cytomegalovirus induces abnormal chondrogenesis and osteogenesis during embryonic mandibular development

    Bringas Pablo

    2008-03-01

    Full Text Available Abstract Background Human clinical studies and mouse models clearly demonstrate that cytomegalovirus (CMV disrupts normal organ and tissue development. Although CMV is one of the most common causes of major birth defects in humans, little is presently known about the mechanism(s underlying CMV-induced congenital malformations. Our prior studies have demonstrated that CMV infection of first branchial arch derivatives (salivary glands and teeth induced severely abnormal phenotypes and that CMV has a particular tropism for neural crest-derived mesenchyme (NCM. Since early embryos are barely susceptible to CMV infection, and the extant evidence suggests that the differentiation program needs to be well underway for embryonic tissues to be susceptible to viral infection and viral-induced pathology, the aim of this study was to determine if first branchial arch NCM cells are susceptible to mCMV infection prior to differentiation of NCM derivatives. Results E11 mouse mandibular processes (MANs were infected with mouse CMV (mCMV for up to 16 days in vitro. mCMV infection of undifferentiated embryonic mouse MANs induced micrognathia consequent to decreased Meckel's cartilage chondrogenesis and mandibular osteogenesis. Specifically, mCMV infection resulted in aberrant stromal cellularity, a smaller, misshapen Meckel's cartilage, and mandibular bone and condylar dysmorphogenesis. Analysis of viral distribution indicates that mCMV primarily infects NCM cells and derivatives. Initial localization studies indicate that mCMV infection changed the cell-specific expression of FN, NF-κB2, RelA, RelB, and Shh and Smad7 proteins. Conclusion Our results indicate that mCMV dysregulation of key signaling pathways in primarily NCM cells and their derivatives severely disrupts mandibular morphogenesis and skeletogenesis. The pathogenesis appears to be centered around the canonical and noncanonical NF-κB pathways, and there is unusual juxtaposition of abnormal stromal

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

    Jung, Yun Hoa; Nah, Kyung Soo; Cho, Bong Hae

    2008-01-01

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

  4. Morphometric and ultrastructural studies of the effect of infrared laser on rabbit temporo-mandibular joint fibroblasts

    Ricardo Cornejo Uribe

    2009-06-01

    articulação temporo-mandibular de coelhos que foram irradiados com raio laser e de outras não irradiadas que foram consideradas como controle normal. As doses diarias de irradiação foram de 2 Joules /cm² durante 10 dias. As amostras foram tratadas para microscopia eletrônica de transmissão. Dos fibroblastos normais e irradiados obtiveram-se microfotografias eletrônicas de transmissão com aumentos finais de 11.500 X, realizando-se estudos morfometricos com propósito de quantificar as frações volumétricas dos componentes celulares pertencentes aos tipos celulares assinalados. Das células indicadas avaliaram-se frações volumétricas correspondentes ao núcleo, citoplasma, retículo endoplásmico rugoso, eucromatina e heterocromatina. Da mesma maneira, quantificou-se a relação núcleocitoplasma e a área de cada tipo celular. Os resultados originados do estudo morfométrico comparativo entre fibroblastos normais e irradiados, indicaram que existem diferencas significativas nas frações volumétricas de eucromatina e heterocromatina e fundamentalmente nas áreas celulares de ambos os tipos. Os outros parâmetros quantificados mantiveram-se constantes. A conclusão é que a função celular traduzida em síntese e secreção de colágeno é constante em ambos os tipos celulares, contudo, produto das estimulações com raio laser infravermelho este fibroblasto tem tendência devido a sua percentagem de eucromatina transcripcionalmente ativa a uma sintese imediata e facilitada de proteinas.

  5. 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.

  6. Fratura extra-articular da extremidade medial da clavícula associada à luxação acromioclavicular tipo IV: relato de caso Extra-articular fracture of the medial end of the clavicle associated with type IV acromioclavicular dislocation: case report

    Mário Chaves Correa

    2011-10-01

    Full Text Available Ocorrendo isoladamente, as fraturas da clavícula e as luxações acromioclaviculares são lesões muito comuns. A combinação de uma luxação acromioclavicular e de uma fratura do terço lateral da clavícula não é rara. Entretanto, existem muito poucos casos descritos de luxações acromioclaviculares associadas a fraturas do terço médio da clavícula; aquelas associadas a fraturas do terço medial são ainda mais raras. Nós reportamos o caso de um indivíduo adulto do sexo masculino que sofreu uma luxação acromioclavicular (tipo IV associada a uma fratura extra-articular desviada da extremidade medial da clavícula (grupo 3 de Almann em um acidente ciclístico. O paciente foi tratado na fase aguda com redução aberta e fixação interna das duas lesões. Na avaliação clínica, 12 meses após a cirurgia, o paciente apresentava-se assintomático, com mobilidade ativa e passiva completa, força e resistência normais e simetria das cinturas escapulares. As radiografias e a tomografia computadorizada tridimensional mostravam subluxação posterossuperior persistente da articulação acromioclavicular e consolidação anatômica da fratura clavicular.Fractures of the clavicle and acromioclavicular dislocations are very common injuries when they occur separately. The combination of an acromioclavicular dislocation and a fracture of the lateral third of the clavicle is not rare. However, there are very few reported cases of acromioclavicular dislocations associated with fractures of the middle third of the clavicle; those associated with fractures of the medial third are even rarer. We report the case of an adult male who suffered an acromioclavicular dislocation (type IV associated with a displaced extra-articular fracture of the medial end of the clavicle (Almann group 3 in a cycling accident. The patient was treated during the acute phase with open reduction and internal fixation of the two lesions. At the clinical evaluation 12

  7. Análise biomecânica comparativa entre os sistemas plate-nail e plate-rod em fraturas induzidas em fêmures de caninos: estudo ex-vivo

    Mesquita, Luciane dos Reis

    2013-01-01

    O objetivo deste estudo foi comparar as propriedades mecânicas da associação da haste intramedular bloqueada e placa óssea (plate-nail) e da associação do pino intramedular e placa óssea (plate-rod), utilizadas em fraturas experimentalmente induzidas em fêmures de caninos. Vinte pares de fêmures de cães foram selecionados para receber os sistemas plate-nail e plate-rod. Em cada fêmur, uma ostectomia no terço médio da diáfise foi realizada e inserido o sistema selecionado. As construções foram...

  8. Mandibular marginal contouring in oriental aesthetic surgery: refined surgical concept and operative procedure.

    Satoh, Kaneshige; Mitsukawa, Nobuyuki

    2014-05-01

    In aesthetic mandibular contouring surgery, which is often conducted in Asians, the operative procedure is thought to deliver a more aesthetic mandibular shape by means of contouring conducted as a whole from the ramus to the symphysis. The authors describe the refined concept and operative procedures of mandibular marginal contouring. For the 7-year period from 2004 to 2011, mandibular marginal contouring has been used in 57 consecutive series of Japanese subjects. Patient ages ranged from 18 to 33 years, and the subjects included 15 men and 42 women. The surgery was carried out by cutting off the protruding deformed mandibular margin from the ramus to the symphysis. In 53 of 57 cases, the focus was on angle contouring. Concomitant genioplasty by horizontal osteotomy of the chin was conducted in 42 of 57 cases (recession, advancement, shortening, elongation, and correction of the shift variously). In 22 materials exhibiting bulk around the mandibular, the ramus to the body was excised sagittally and thinned. In all the patients, mandibular marginal contouring from the ramus to the symphysis was completed. Partial masseter muscle resection was conducted in 11 of 57 cases. Mandibular contouring effectively achieved a highly satisfactory result in all cases. The upper portion of the peripheral branch of the trunk of the mental nerve was dissected by an electric scalpel in 1 case but sutured immediately using an 8-0 nylon stitch. Transient palsy of the mental nerve was noticed in a few cases but subsided in 1 to 2 months. No particular complications were encountered. No secondary revision was required in this series. In mandibular angle plasty, mandibular marginal contouring from the ramus to the symphysis should be carried out by cutting off the angle keeping in mind the entire mandibular shape. This concept and the procedure can deliver greater patient satisfaction.

  9. Sexual dimorphism of the internal mandibular chamber in Fayum Pliohyracidae (Mammalia)

    de Blieux, D.D.; Baumrind, M.R.; Simons, E.L.; Chatrath, P.S.; Meyer, G.E.; Attia, Y.S.

    2006-01-01

    An internal mandibular fenestra and chamber are found in many fossil hyracoids. The internal mandibular fenestra is located on the lingual surface of the mandibular corpus and opens into a chamber within the mandible. The mandibular chamber is maximally developed in late Eocene Thyrohyrax meyeri and early Oligocene Thyrohyrax domorictus from the Fayum Province of Egypt. The function of this chamber is unknown as it is not found in extant hyraxes, nor is it known to occur in any other mammal. In Thyrohyrax, this feature appears to be sexually dimorphic because it is confined to roughly one half of the specimens that otherwise cannot be separated by dental characteristics or measurements. It has been suggested that the chamber is found in females based on the presumed distribution of this character in other fossil hyracoids. Fossils from Fayum Quarry L-41, preserving the sexually dimorphic anterior dentition, show that, in Thyrohyrax meyeri and Thyrohyrax domorictus, the internal mandibular chamber is found in males. In Thyrohyrax litholagus, an internal mandibular fenestra and inflated mandibular chamber occurs in males whereas females show the variable presence of an internal mandibular fossa or fenestra but lack an expanded chamber. Other genera show differing patterns of sexual variation in which some Fayum hyracoids have an internal mandibular fenestra in both sexes but with the greatest development of the mandibular chamber occurring in males. We review functions proposed for the internal mandibular chamber and suggest that it housed a laryngeal air sac that may have had a vocal function by acting as a resonating chamber. ?? 2006 by the Society of Vertebrate Paleontology.

  10. A correlational study of scoliosis and trunk balance in adult patients with mandibular deviation.

    Shuncheng Zhou

    Full Text Available Previous studies have confirmed that patients with mandibular deviation often have abnormal morphology of their cervical vertebrae. However, the relationship between mandibular deviation, scoliosis, and trunk balance has not been studied. Currently, mandibular deviation is usually treated as a single pathology, which leads to poor clinical efficiency. We investigated the relationship of spine coronal morphology and trunk balance in adult patients with mandibular deviation, and compared the finding to those in healthy volunteers. 35 adult patients with skeletal mandibular deviation and 10 healthy volunteers underwent anterior X-ray films of the head and posteroanterior X-ray films of the spine. Landmarks and lines were drawn and measured on these films. The axis distance method was used to measure the degree of scoliosis and the balance angle method was used to measure trunk balance. The relationship of mandibular deviation, spine coronal morphology and trunk balance was evaluated with the Pearson correlation method. The spine coronal morphology of patients with mandibular deviation demonstrated an "S" type curve, while a straight line parallel with the gravity line was found in the control group (significant difference, p1°, while the control group had a normal trunk balance (imbalance angle <1°. There was a significant difference between the two groups (p<0.01. The degree of scoliosis and shoulder imbalance correlated with the degree of mandibular deviation, and presented a linear trend. The direction of mandibular deviation was the same as that of the lateral bending of thoracolumbar vertebrae, which was opposite to the direction of lateral bending of cervical vertebrae. Our study shows the degree of mandibular deviation has a high correlation with the degree of scoliosis and trunk imbalance, all the three deformities should be clinically evaluated in the management of mandibular deviation.

  11. Fratura toracolombar explosão: confiabilidade do método de guerra na análise tomográfica Thoracolumbar burst fracture: reliability of the guerra's method on tomographic analysis

    Osmar Avanzi

    2009-01-01

    Full Text Available OBJETIVOS: Avaliar as características do fragmento retropulsado nas fraturas explosão da coluna toracolombar, de acordo com dois examinadores independentes no plano sagital da TAC e correlacionar estes achados com a presença de déficit neurológico. MATERIAL E MÉTODOS: Coleta retrospectiva de dados de prontuário e TC em 138 pacientes com fratura toracolombar do tipo explosão internados no nosso serviço entre 1983 e 2004. RESULTADOS: Observamos correlação significante entre dois examinadores independentes (pOBJECTIVES: The objective of the current study was to evaluate the correlation between neurological deficits and the characteristics of retropulsed fragment into the spinal canal in patients with thoracolumbar burst fractures. MATERIAL AND METHODS: From 1983 to 2004, 135 patients with thoracolumbar burst fractures according to Denis' criteria were evaluated at a tertiary teaching institution by two different observers. CT-Scans of the fractured spine were analyzed in order to assess the narrowing of the spinal canal. Neurological deficit was evaluated by using the Franke's classification. RESULTS: A significant correlation was found between two independent observers (P<0.05. The observed characteristics of the retropulsed fragment into the spinal canal were: triangular form, rotation dislocation with average of 20 degrees and cranial dislocation with average of eight millimeters. There was no statistical correlation between neurological deficits and the characteristics of retropulsed fragment of the spinal canal. CONCLUSION: There was no statistical correlation between neurological deficits and the characteristics of retropulsed fragment of the spinal canal.

  12. Avaliação dos resultados da redução aberta e da fixação interna das fraturas graves da extremidade proximal do úmero em idosos

    Alberto Naoki Miyazaki

    2014-01-01

    Full Text Available Objetivo: avaliar clinica e radiologicamente os resultados obtidos com a redução aberta e a fixação interna das fraturas graves da extremidade proximal do úmero (FGEPU na população com idade igual ou superior a 60 anos. Métodos: entre junho de 1992 e fevereiro de 2011, o Grupo de Ombro e Cotovelo do Departamento de Ortopedia e Traumatologia da Faculdade de Ciências Médicas da Santa Casa de São Paulo tratou, com redução aberta e fixação interna, 21 pacientes com FGEPU e com idade superior a 60 anos. Desses, 18 foram reavaliados. Resultados: dois pacientes evoluíram com resultados excelentes, 12 bons, três regulares e um ruim. Portanto, verificamos que 77,7% evoluíram com bons e excelentes resultados. Todos os pacientes estavam satisfeitos com o tratamento e apenas três não retornaram às atividades prévias. As médias de mobilidade pós-operatória foram de 122° de elevação (90° -150°, 39° de rotação lateral (20 °-60° e T11 de rotação medial (T5 a Glúteo. Conclusão: a redução aberta e a fixação interna das FGEPU podem ser indicadas também para pacientes idosos e obtivemos 77,7% de bons e excelentes resultados. Estatisticamente (p < 0,05, a redução anatômica da fratura mostrou-se importante para a obtenção de bons resultados.

  13. 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)...

  14. Evaluation of Root and Canal Systems of Mandibular First Molars in Taiwanese Individuals Using Cone-beam Computed Tomography

    Chih-Chia Huang

    2010-04-01

    Conclusion: Our results showed a high overall incidence (32.6% of three-rooted mandibular first molars in Taiwanese individuals. CBCT could be a valuable tool for identifying an extra distolingual root in mandibular first molars.

  15. Radiography of the mandible prior to endosseous implant treatment. Localization of the mandibular canal and assessment of trabecular bone

    Lindh, C.

    1996-03-01

    Mandibular autopsy specimens were examined with different radiographic techniques in order to evaluate the visibility of the mandibular canal and the measurement accuracy of distances related to the mandibular canal. Hypocycloidal, spiral and computed tomography (CT) were superior to periapical and panoramic radiography in visualizing the mandibular canal. The tomographic techniques were more accurate when measurements of distances related to the mandibular canal were performed. No difference in measurement accuracy was found between the tomographic techniques. Concerning visibility of the mandibular canal, interobserver agreement was lowest for periapical radiography and highest for CT. Intraobserver agreement was moderate or good for all techniques. A high interobserver variation was found for measurability of distances related to the mandibular canal. The trabecular bone tissue in mandibular autopsy specimens was studied concerning different characteristics. A classification system to be used prior to implant treatment, based on the trabecular pattern in periapical radiographs, was proposed. 74 refs

  16. Radiography of the mandible prior to endosseous implant treatment. Localization of the mandibular canal and assessment of trabecular bone

    Lindh, C.

    1996-03-01

    Mandibular autopsy specimens were examined with different radiographic techniques in order to evaluate the visibility of the mandibular canal and the measurement accuracy of distances related to the mandibular canal. Hypocycloidal, spiral and computed tomography (CT) were superior to periapical and panoramic radiography in visualizing the mandibular canal. The tomographic techniques were more accurate when measurements of distances related to the mandibular canal were performed. No difference in measurement accuracy was found between the tomographic techniques. Concerning visibility of the mandibular canal, interobserver agreement was lowest for periapical radiography and highest for CT. Intraobserver agreement was moderate or good for all techniques. A high interobserver variation was found for measurability of distances related to the mandibular canal. The trabecular bone tissue in mandibular autopsy specimens was studied concerning different characteristics. A classification system to be used prior to implant treatment, based on the trabecular pattern in periapical radiographs, was proposed. 74 refs.

  17. Armazenamento de sementes de braquiária peletizadas e tratadas com fungicida e inseticida Brachiaria coated seed storage treated with fungicide and insecticide

    Carlos Eduardo Pereira

    2011-12-01

    Full Text Available A qualidade de sementes é fundamental para o sucesso da formação de pastagem, de forma que é importante viabilizar tecnologias para elas. Assim, objetivou-se com este trabalho avaliar o desempenho de sementes de Brachiaria decumbens peletizadas e tratadas com fungicida e inseticida, durante o armazenamento. As sementes foram tratadas com thiabendazol na dosagem de 200mL 100kg-1 de sementes, com fipronil na dosagem de 500mL 100kg-1 de sementes e com a mistura de ambos (nas mesmas dosagens e parte não foi submetida a esses tratamentos (testemunha. Posteriormente, as sementes foram peletizadas utilizando-se uma mistura de areia + microcelulose e cola Cascorex - PVA (20%, as quais em seguida foram armazenadas em condições ambientais em armazém convencional (temperatura e umidade relativa do ar média de 21,9°C e 68%, respectivamente, durante 12 meses. As sementes foram avaliadas inicialmente e a cada quatro meses com as seguintes avaliações: teor de água, teste de germinação, índice de velocidade de germinação, teste de emergência e índice de velocidade de emergência. A peletização das sementes de Brachiaria decumbens com areia e microcelulose prejudica a porcentagem e velocidade de germinação, bem como a emergência de plântulas durante o armazenamento. Sementes de Brachiaria decumbens cv. 'Basilisk' tratadas com fipronil, thiabendazol, ou com ambos, não devem ser armazenadas por mais de oito meses.The quality of seed is crucial to the success of pasture formation. Thus the aim of this research was to evaluate the performance of Brachiaria decumbens seeds pelleted and treated with fungicides and insecticides during storage. The seeds were treated with thiabendazole at a dosage of 200mL 100kg-1 of seeds, with fipronil at a dosage of 500mL 100kg-1 of seeds and a mixture of both (in the same dosages and some was not subjected to such treatment (control. Subsequently the seeds were coated using a mixture of sand

  18. ISOLAMENTO E IDENTIFICAÇÃO DE MICOBACTÉRIAS EM ÁGUAS TRATADAS PROVENIENTES DO SISTEMA DE ABASTECIMENTO DE ARARAQUARA-SP

    Josiane Aparecida GASPAR-GRILLO

    2012-01-01

    Full Text Available A qualidade da água é muito importante para a saúde e bem-estar do ser humano e o sistema de abastecimento público deve fornecer água de qualidade e em quantidade suficiente para toda a população. As estações de tratamento de água constituem o principal caminho para obtenção de água de qualidade. Quando isso não ocorre vários problemas podem afetar a população que passa a consumir água com qualidade inadequada e com o risco constante de surgimento de várias doenças. A eliminação de micro-organismos em água tratada reduz a competição, favorecendo a multiplicação de bactérias resistentes ao cloro como as do gênero Mycobacterium frequentemente isoladas de águas tratadas e cloradas. Considerando a não indicação da pesquisa de micobactérias nos exames laboratoriais de rotina para controle de qualidade de água para consumo humano e outros usos, o objetivo deste trabalho foi verificar a presença, isolar e identificar as micobactérias ambientais no sistema de abastecimento de água de origem superficial da cidade de Araraquara – SP. Foram analisadas 40 amostras de águas, assim distribuídas: dez de água bruta colhidas na Estação de Tratamento de Água (ETA, dez colhidas após filtração, dez colhidas no reservatório após cloração e dez na rede de distribuição. Foram recuperados 43 isolados de micobactérias. Todos os isolados foram submetidos ao PCR-PRA. As espécies de micobactérias identificadas foram M. lentiflavum, M. parafortuitum, M. genavense, M. gordonae, M. fortuitum, M. confluentis, M. duvalii, M. avium subespécie paratuberculose e M. szulgai. Com esses resultados, concluiu-se que a água é importante fonte de micobactérias ambientais provavelmente relacionadas a várias doenças humanas, sugerindo-se a realização de acompanhamento contínuo desses micro-organismos no sistema de água potável.

  19. Identificación y caracterización de especies de Neosartorya aisladas de frutillas (Fragaria spp. frescas y tratadas térmicamente

    Laura Frisón

    2012-12-01

    Full Text Available El género Aspergillus es uno de los géneros fúngicos más estudiados y de gran impacto a nivel industrial. La sección Fumigati incluye unas pocas especies anamorfas del género Aspergillus. Las especies que son teleomorfas se encuentran dentro del género Neosartorya. Este es un moho resistente al calor que causan problemas en las industrias alimentarias o enfermedades en los seres humanos. Sus ascosporas han sido aisladas a partir de frutas, pulpas y jugos, ya que pueden sobrevivir a los tratamientos de térmicos industriales pudiendo aparecer la contaminación post-pasteurización. El objetivo fue caracterizar aislados de Neosartorya de frutillas frescas recién cosechadas y tratadas térmicamente, analizando la ornamentación de las ascosporas, toxicidad y resistencia térmica. Se aislaron las colonias, y se identificaron macro y microscópicamente siguiendo la metodología de Pitt y Hocking (2009, de 60 muestras. Se caracterizaron las ascosporas por microscopía electrónica de barrido. Se determinó la capacidad toxicogénica de los extractos por cromatografía líquida de alta eficiencia. Se evaluó la resistencia térmica a diferentes temperaturas. Se aislaron 18 cepas de Neosartorya de frutillas recién cosechadas, y otros mohos termorresistentes como Arthrinium phaeospermum, Byssochlamys nivea y Talaromyces macrosporus. En las frutillas tratadas térmicamente no se aislaron mohos termorresistentes. Trece aislados mostraron ascosporascoincidentes con N. fischeri, el resto con N. spinosa. Los aislados de N. fischeri produjeron fumitremorgina A y B y verruculógeno en arroz, pero no lo hicieron en frutillas frescas. Los parámetros de resistencia térmica fueron: D80 ºC: 20 - 22 minutos, D85 ºC: 9 - 11 minutos, D90 ºC: 2 - 3 minutos y z: 10 - 11 ºC para N. fischeri y D80 ºC: > 120 minutos, D85 ºC: 11 - 94 minutos, D90 ºC: 3 - 15 minutos y z: 6 - 9 ºC para N. spinosa. Es indispensable aplicar buenas prácticas agrícolas y

  20. Identificación y caracterización de especies de Neosartorya aisladas de frutillas (Fragaria spp. frescas y tratadas térmicamente

    Laura Frisón

    2012-01-01

    Full Text Available El género Aspergillus es uno de los géneros fúngicos más estudiados y de gran impacto a nivel industrial. La sección Fumigati incluye unas pocas especies anamorfas del género Aspergillus. Las especies que son teleomorfas se encuentran dentro del género Neosartorya. Este es un moho resistente al calor que causan problemas en las industrias alimentarias o enfermedades en los seres humanos. Sus ascosporas han sido aisladas a partir de frutas, pulpas y jugos, ya que pueden sobrevivir a los tratamientos de térmicos industriales pudiendo aparecer la contaminación post-pasteurización. El objetivo fue caracterizar aislados de Neosartorya de frutillas frescas recién cosechadas y tratadas térmicamente, analizando la ornamentación de las ascosporas, toxicidad y resistencia térmica. Se aislaron las colonias, y se identificaron macro y microscópicamente siguiendo la metodología de Pitt y Hocking (2009, de 60 muestras. Se caracterizaron las ascosporas por microscopía electrónica de barrido. Se determinó la capacidad toxicogénica de los extractos por cromatografía líquida de alta eficiencia. Se evaluó la resistencia térmica a diferentes temperaturas. Se aislaron 18 cepas de Neosartorya de frutillas recién cosechadas, y otros mohos termorresistentes como Arthrinium phaeospermum, Byssochlamys nivea y Talaromyces macrosporus. En las frutillas tratadas térmicamente no se aislaron mohos termorresistentes. Trece aislados mostraron ascosporas coincidentes con N. fischeri, el resto con N. spinosa. Los aislados de N. fischeri produjeron fumitremorgina A y B y verruculógeno en arroz, pero no lo hicieron en frutillas frescas. Los parámetros de resistencia térmica fueron: D80 ºC: 20 - 22 minutos, D85 ºC: 9 - 11 minutos, D90 ºC: 2 - 3 minutos y z: 10 - 11 ºC para N. fischeri y D80 ºC: > 120 minutos, D85 ºC: 11 - 94 minutos, D90 ºC: 3 - 15 minutos y z: 6 - 9 ºC para N. spinosa. Es indispensable aplicar buenas prácticas agrícolas y

  1. Changes in the edentulous maxilla in persons wearing implant-retained mandibular overdentures

    Narhi, TO; Geertman, ME; Hevinga, M; Abdo, H; Kalk, W

    Statement of problem. It has been suggested that risk for severe resorption in the anterior maxilla is increased in persons wearing mandibular implant-retained overdentures. However, little information is available about the changes in the edentulous maxilla after mandibular implant treatment.

  2. Coronectomy of the mandibular third molar: Respect for the inferior alveolar nerve

    Kouwenberg, A. J.; Stroy, L. P. P.; Rijt, E. D. Vree-V. D.; Mensink, G.; Gooris, P. J. J.

    2016-01-01

    The aim of this study was to evaluate the outcomes of coronectomy as an alternative surgical procedure to complete removal of the impacted mandibular third molar in patients with a suspected close relationship between the tooth root(s) and the mandibular canal. A total of 151 patients underwent

  3. Endodontic Treatment of a Mandibular Second Premolar with Three Roots and Three Canals

    Bonny Paul

    2014-01-01

    Full Text Available Complex root canal system with atypical variations is a common finding among mandibular premolars. Endodontic treatment in these teeth may not be successful due to the failure to recognise and treat multiple canals. This paper presents endodontic treatment of a mandibular second premolar with three roots and three canals.

  4. An unusual presentation of all the mandibular anterior teeth with two root canals - A case report

    Tiku A

    2005-01-01

    Full Text Available A rare case of two root canals in all mandibular anterior teeth is presented. The patient initially reported for the treatment of mandibular right central and lateral incisors. However, radiographic evaluation revealed variant root canal and apical foramen patterns.

  5. Endodontic treatment of an unusual connation of permanent mandibular molars: a case report.

    Liu, Shengbo; Fan, Bing; Peng, Bin; Fan, Mingwen; Bian, Zhuan

    2006-10-01

    A 27-year-old patient with an anomalous mandibular molar was referred for endodontic therapy. Clinical and radiographic examination revealed the connation of a second mandibular molar with a third molar. Challenging endodontic therapy was performed in the unusual connated molars. A 2-year recall showed good treatment result.

  6. Function impairment and pain after closed treatment of fractures of the mandibular condyle

    Dijkstra, P.U.; Stegenga, B.; de Bont, L.G.; Bos, R.R.

    Background: To determine the prognosis of fractures of the mandibular condyle after closed treatment. Methods: Patients (n = 144) with a fracture of the mandibular condyle, all treated closed, were included in the study. Fracture types and position of the fracture parts were determined on

  7. Mandibular Kondil Kırıkları ve Tedavi Yöntemleri

    Kısa, Halil İbrahim; Tatlı, Ufuk; Kürkcü, Mehmet

    2014-01-01

    Maxillofacial injuries are most commonly associated with falls, motor and vehicle accidents, sports-related trauma, and interpersonel violence. The complexity of mandibular condyle region and its anatomic proximity to other craniofacial structures complicate diagnosis and treatment. Thus, treatment approaches of mandibular condyle fracture are still controversial. In the literature, different success rates are reported about observation versus treatment, closed reduction versus open reduction...

  8. Evaluation of soft-tissue artifacts when using anatomical and technical markers to measure mandibular motion

    Chien-Chih Chen

    2011-06-01

    Conclusions: It appears that markers on the frontal nose bridge are good alternatives to transoral rigid devices for measuring mandibular motion, compared to optical frame markers and other skin markers on the face. The results of the current study will be helpful for establishing guidelines for marker placement when measuring mandibular movements in patients with potential temporomandibular disorders.

  9. Experimental occlusal interferences. Part III. Mandibular rotations induced by a rigid interference.

    Rassouli, N M; Christensen, L V

    1995-10-01

    A rigid intercuspal interference (minimum mean height of 0.24 mm) was placed on either the right or left mandibular second premolar and first molar of 12 subjects. During brisk and forceful biting on the interference, rotational electrognathography measured maximum torque of the right and left mandibular condyles in the frontal and horizontal planes of orientation. All subjects showed frontal plan upward rotation (mean of 0.7 degrees) of the mandibular condyle contralateral to the interference. In 33% of the subjects there was no horizontal plane backward rotation. In 58% of the subjects there was horizontal plane backward rotation (mean of 0.5 degrees) of the mandibular condyle ipsilateral to the interference, and in one subject (8%) there was backward horizontal plane rotation (0.1 degree) of the mandibular condyle contralateral to the interference. It was inferred that the masseter muscle, ipsilateral to the interference, generated negative work in order to decelerate frontal plane 'unseating' of the mandibular condyle ipsilateral to the interference. It was inferred that the masseter muscle, contralateral to the interference, produced positive work in order to accelerate frontal plane 'seating' of the mandibular condyle contralateral to the interference. Finally, it was speculated that the impact forces of frontal plane 'seating' of the mandibular condyle, contralateral to the interference, might lead to 'vacuum sticking' of the temporomandibular joint disc because of the formation of negative hydrostatic pressures.

  10. Rotational movements of mandibular two-implant overdentures.

    Kimoto, Suguru; Pan, Shaoxia; Drolet, Nicolas; Feine, Jocelyne S

    2009-08-01

    Clinicians have reported that their patients complain that their mandibular two-implant overdentures (IOD) rotate. Therefore, we studied the frequency and severity of rotation of IODs with two-ball attachments, how rotation may influence perceived satisfaction ratings of chewing ability, and the factors that are involved in the rotation of IODs. Seventy-nine participants were recruited and asked to rate their general satisfaction of their IODs, as well as their ability to chew foods, the existence of any mandibular denture rotation, and to what degree denture rotation bothered them. Data on participant sociodemographic, anatomical, and prosthesis characteristics were also collected. Student's t-test and logistic regression analyses were performed to analyze the differences between participants who did (R group) and did not report (NR group) denture rotation. Thirty-seven of 79 participants were aware of rotational movement in their IODs. These patients were significantly less satisfied with their chewing ability than those who felt no rotation (69.1 mm R group vs. 82.9 mm), and discomfort caused by the rotation bothered them moderately (39/100 mm). The multivariate logistic regression analysis revealed that the arrangement of the anterior teeth and the length of the denture are significantly associated with awareness of denture rotation. Thirty-eight percent in the R group and 31% in the NR group had non-scheduled visits. Rotational movement with a mandibular two-IOD has a negative effect on perceived chewing ability and is associated with anterior tooth arrangement and denture length.

  11. Open versus closed reduction: diacapitular fractures of the mandibular condyle.

    Chrcanovic, Bruno Ramos

    2012-09-01

    The purpose of the study was to review the literature regarding the evolution of current thoughts on management of diacapitular fractures (DFs) of the mandibular condyle. An electronic search in PubMed was undertaken in March 2012. The titles and abstracts from these results were read to identify studies within the selection criteria. Eligibility criteria included studies reporting clinical series of DFs, including both animal and human studies, without date or language restrictions. The search strategy initially yielded 108 references. Twenty-eight studies were identified without repetition within the selection criteria. Additional hand-searching of the reference lists of selected studies yielded three additional papers. The current indications for open reduction and internal fixation (ORIF) of DFs described in the literature are: (a) fractures affecting the lateral condyle with reduction of mandibular height; (b) fractures in which the proximal fragment dislocates laterally out of the glenoid fossa, which cannot be reduced by closed or open treatment of another part of the mandibular fracture. The indications for conservative treatment are: (a) fractures that do not shorten the condylar height (a fracture with displacement of the medial parts of the condyle); (b) undisplaced fractures; (c) comminution of the condylar head, when the bony fragments are too small for stable fixation; and (d) fractures in children. As the temporomandibular joint disk plays an important role as a barrier preventing ankylosis, it is important to reposition the disk (if displaced/dislocated) during the surgical treatment of DFs. The lateral pterygoid muscle should never be stripped from the medially displaced fragment because its desinsertion disrupts circulation to the medial bony fragment, and also because this muscle helps to restore the muscle function after surgery. ORIF of selected DFs improves prognosis by anatomical bone and soft tissue recovery when combined with physical

  12. Pamidronate Affects the Mandibular Cortex of Children with Osteogenesis Imperfecta

    Apolinário, A.C.; Figueiredo, P.T.; Guimarães, A.T.; Acevedo, A.C.; Castro, L.C.; Paula, A.P.; Paula, L.M.; Melo, N.S.; Leite, A.F.

    2015-01-01

    We hypothesized that mandibular cortical width (MCW) is smaller in children with osteogenesis imperfecta (OI) than in healthy children and that pamidronate can improve the cortical mandibular thickness. The aim of this study was to assess changes in the MCW on dental panoramic radiographs (DPRs) of children with normal bone mineral density (BMD) and with OI. We also compared the MCW of children with different types of OI regarding the number of pamidronate cycles and age at the beginning of treatment. MCW measurements were retrospectively obtained from 197 DPRs of 66 children with OI types I, III, and IV who were in treatment with a comparable dosage of cyclical intravenous pamidronate between 2007 and 2013. The control group had 92 DPRs from normal BMD children. Factorial analysis of variance was used to compare MCW measurements among different age groups and between sexes and also to compare MCW measurements of children with different types of OI among different pamidronate cycles and age at the beginning of treatment. No significant differences in results were found between male and female subjects in both OI and healthy children, so they were evaluated altogether (P > 0.05). There was an increase of MCW values related to aging in all normal BMD and OI children but on a smaller scale in children with OI types I and III. Children with OI presented lower mean MCW values than did children with normal BMD at the beginning of treatment (P < 0.05). A linear model estimated the number of pamidronate cycles necessary to achieve mean MCW values equivalent to those of healthy children. The thinning of the mandibular cortex depended on the number of pamidronate cycles, the type of OI, and the age at the beginning of treatment. DPRs could thus provide a way to identify cyclic pamidronate treatment outcomes in patients with OI. PMID:25608973

  13. Internal fixation of mandibular angle fractures: a meta-analysis.

    Regev, Eran; Shiff, Jacob S; Kiss, Alex; Fialkov, Jeffrey A

    2010-06-01

    The degree of rigidity of internal fixation required for the treatment of mandibular angle fractures has long been at the center of debate in the literature. A statistical comparison between rigid fixation and monocortical fixation has been difficult because of multiple terms, definitions, and technical variations. The purpose of this study was to use the meta-analysis tool to combine information from multiple studies and to compare complication rates for different fixation methods. An English language literature search was conducted for articles on mandibular angle fractures. Information was collected on four variables of interest: compression/noncompression technique, monocortical/bicortical screws, number of plates, and location of plates. Five outcome rates were analyzed: infection, reoperation, hardware removal, malunion, and nonunion. Meta-analyses were run using Comprehensive Meta Analysis, version 2.2.03. Twenty-four studies with relevant data on the variables and outcomes of interest met the inclusion criteria. Significantly higher rates of infection, reoperation, and hardware removal were found for compression compared with noncompression, two plates compared with one plate, and for plates located on both the inferior and superior borders as compared with superior or inferior only. There were also significantly higher infection rates for bicortical screws compared with monocortical screws and higher malunion rates for compression compared with noncompression plating techniques. The results of this meta-analysis found lower complication rates with the use of noncompression, monocortical, and single-plate fixation, supporting the trend toward a single, superiorly placed, monocortical miniplate for fixation of mandibular angle fractures.

  14. Attachment systems for mandibular implant overdentures: a systematic review

    Kim, Ha-Young; Lee, Jeong-Yol; Bryant, S. Ross

    2012-01-01

    PURPOSE The aim of this systematic review was to address treatment outcome according to attachment systems for mandibular implant overdentures in terms of implant survival rate, prosthetic maintenance and complications, and patient satisfaction. MATERIALS AND METHODS A systematic literature search was conducted using PubMed and hand searching of relevant journals considering inclusion and exclusion criteria. Clinical trial studies on mandibular implant overdentures until August, 2010 were selected if more than one type of overdenture attachment was reported. Twenty four studies from 1098 studies were finally included and the data on implant survival rate, prosthetic maintenance and complications, patient satisfaction were analyzed relative to attachment systems. RESULTS Four studies presented implant survival rates (95.8 - 97.5% for bar, 96.2 - 100% for ball, 91.7% for magnet) according to attachment system. Ten other studies presented an implant survival rate ranging from 93.3% to 100% without respect to the attachment groups. Common prosthetic maintenance and complications were replacement of an assay for magnet attachments, and activation of a matrix or clip for ball or bar attachments. Prosthetic maintenance and complications most commonly occurred in the magnet groups. Conflicting findings were found on the rate of prosthetic maintenance and complications comparing ball and bar attachments. Most studies showed no significant differences in patient satisfaction depending upon attachment systems. CONCLUSION The implant survival rate of mandibular overdentures seemed to be high regardless attachment systems. The prosthetic maintenance and complications may be influenced by attachment systems. However patient satisfaction may be independent of the attachment system. PMID:23236571

  15. Management of fractures of the mandibular body and symphysis.

    Goodday, Reginald H B

    2013-11-01

    Mandibular fracture, specifically in the symphysis and body regions combined, is the most common facial fracture requiring hospitalization in North America. The primary treatment objective is to restore form and function by achieving anatomic reduction and placing fixation that eliminates mobility of the bone fragments. Several treatment options and surgical techniques are available for performing closed or open reduction. Special considerations are necessary when treating pediatric patients and fractures of the edentulous mandible. Complications relating to the tooth and denture-bearing regions of the mandible include infection, nonunion, and neurosensory changes. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. Autotransplantation of a mandibular third molar: A case report

    Elham Najafi

    2017-09-01

    Full Text Available Tooth autotransplantation defines as transition of one tooth from one position to another, in same individual. It is a biological procedure in which teeth have the potential to induce alveolar bone growth. It can be applied in patients before adolescence growth is finished. It significantly reduces time and cost compared to implants. Healing rapidly occurs and function is regained almost immediately. Our case was a 15-year-old male that his left mandibular third molar transplanted to the second molar sight after extraction of second molar because of unrestorable crown. During 9 month follow up transplanted tooth was asymptomatic, functional and responsive to sensibility tests. (Cold test, EPT.

  17. Recurrent unicystic ameloblastoma in mandibular anterior teeth area

    Lee, Won Do; Lee, Wan; Kim, Jin Hoa; Choi, Dong Hoon; Paeng, Jun Young; Kim, Eun Cheol

    2008-01-01

    The unicystic ameloblastoma (UA) is a variant of the solid or multicystic ameloblastoma, a less encountered variant of the ameloblastoma. It appears more frequently in the second or third decade with no sexual or racial predilection. It is almost exclusively encountered asymptomatically in the posterior mandible. We report a case of a 43-year old patient with UA, who had previously undergone a surgical treatment on the same site about 1 year ago, this lesion recurred and presented as an exophytic gingival lesion in the anterior mandibular region.

  18. Lingual mandibular osteonecrosis after dental impressions for orthodontic study models.

    Cerruto, Carmen; Ugolini, Alessandro; Cozzani, Mauro

    2018-03-01

    A 43-year-old man sought orthodontic treatment to close anterior diastemas. During the impression procedure for routine documentation, the orthodontic assistant exerted excessive pressure on the metallic tray; 2 days later, the patient reported the detachment of a small piece of mucosa overlying the mylohyoid crest and was referred to a maxillofacial surgeon with a diagnosis of lingual mandibular osteonecrosis. The etiology of bony osteonecrosis is discussed, together with the anatomic variations that can be present in the basal bone and that must be carefully checked before an impression is taken. Copyright © 2017 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  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. Pregnancy tumor: A rare case report in mandibular anteriors

    Swati Phore

    2017-01-01

    Full Text Available Pregnancy in a woman's life is associated with a variety of physiological, anatomical, and hormonal changes that can affect the cardiovascular, respiratory, and gastrointestinal systems. Such hormonal changes may lead to periodontal diseases and may be associated with generalized or localized gingival enlargements. Pregnancy does not cause the condition, but altered tissue metabolism in pregnancy accentuates the response to the local irritants, thereby causing gingival enlargements. In this report, a 25-year-old pregnant female had a localized gingival enlargement in the labial aspect of the mandibular anterior region.

  1. Artrosis en la articulación temporo-mandibular

    Muñoz, Pablo Nicolás

    2017-01-01

    Se presenta un caso clínico de una paciente de 70 años que acusa dolor orofacialsimétrico y dolor local a nivel de la articulación temporo-mandibular (ATM) derecha. La exploración clínica muestra disminución del rango de movimiento articular, crepitación a la auscultación, y puntos gatillos miofascialesa nivel de la musculatura masticatoria. El estudio radiológico confirma artrosis en la ATM y se termina concluyendo que la sintomatología es provocada, principalmente, por el síndrome de dolor ...

  2. Bilateral septic arthritis of the temporo mandibular joint: case report.

    Ayachi, Samia; Mziou, Zouha; Moatemri, Ramzi; Khochtali, Habib

    2016-01-01

    Septic arthritis of the temporo-mandibular joint (TMJ) is a rare disease that has been reported infrequently. To the best of the authors' knowledge, only one case of bilateral TMJ septic arthritis has been reported. The contamination may result from direct extension of adjacent infection (dental or ENT), from hematogenous spread of blood-borne organisms or from direct inoculation. The most common presenting are trismus and pain, although swelling, tenderness and erythema have also been described. In addition, patients may develop fever, regional lymphadenopathy and malocclusion. Through a successively bilateral case of TMJ arthritis, without obvious portal of entry of the bacteria, we will analyze characteristics and treatment of this disease.

  3. Temporo-mandibular joint disease in ankylosing spondylitis.

    Davidson, C; Wojtulewski, J A; Bacon, P A; Winstock, D

    1975-01-01

    The occurrence of temporo-mandibular joint (TMJ) disease in ankylosing spondylitis is not widely recognized and its incidence is disputed. Seventy-nine patients attending two routine rheumatology clinics were therefore examined by dental surgeon and nine (11-5 per cent) were considered to have specific TMJ involvement. These patients were older than the remainder, and had more extensive spinal and peripheral joint disease. Symptoms were mild and the predominant clinical feature was restricted mouth opening, which could present considerable difficulties during emergency anaesthesia. Bilateral condylectomy was undertaken in one patient with some benefit. Images PMID:1124959

  4. [Comparative evolution surgical accesses to temporo-mandibular joint].

    Sysoliatin, P G; Novikov, A I; Sysoliatin, S P; Bobylev, N G; Brega, I N

    2007-01-01

    In experiment on 30 corpses of adult people criteria of an operational wound (depth of a wound, a corner of operational action, an axis of operational action, a corner of an inclination of operational action) were studied at preauricularis, intrauricularis, intrauriculo-temporalis and posterior mandibullaris access to temporo-mandibular joint (TMJ). New surgical intrauriculo-temporalis access to the joint is substantrated. On the basis of the analysis of 289 operations at 268 patients the indications to a choice of surgical access were developed at various diseases and damages of TMJ.

  5. 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.

  6. Mandibular overdentures: a review of treatment philosophy and prosthodontic maintenance.

    Al-Zubeidi, Mohammed I; Payne, Alan G T

    2007-12-01

    Root overdentures and implant overdentures are two similar treatment options for the nearly-edentulous or edentulous mandible. The purpose of this literature review was to specifically compare their prosthodontic treatment philosophies and follow-up maintenance requirements. Critical comparison of these two prosthodontic treatment philosophies revealed that the foundation for overdentures which is provided by oral implants is more predictable than that provided by the roots of natural teeth. The two treatment modalities have both similarities and differences in their associated prosthodontic maintenance. The findings of this literature review suggest the future possibility that mandibular root overdentures may become obsolete as a treatment approach.

  7. Mandibular bone necrosis after use of paraformaldehyde-containing paste

    Chi-hwan Lee

    2016-11-01

    Full Text Available Paraformaldehyde has been used in the past as a pulpotomy agent. However, it has a severe cytotoxic effect and may cause alveolar bone necrosis. Depulpin, a devitalizing agent containing 49% paraformaldehyde, is no longer used frequently due to its severe side effects. In the two cases described in the present study, Depulpin was used as a devitalizing agent during root canal treatment. It caused a gradual loss of sensibility in adjacent teeth, gingival necrosis, and osteomyelitis. This case report demonstrates the serious side effects of using a paraformaldehyde-containing paste as a devitalizing agent for pulp, particularly mandibular bone necrosis.

  8. Functional Treatment of a Child with Extracapsular Mandibular Fracture

    Diana Cassi

    2017-01-01

    Full Text Available Condylar fractures are among the most frequent fractures in the context of traumatic lesions of the face. The management of condylar fractures is still controversial, especially when fractures occur in children: if overlooked or inappropriately treated, these lesions may lead to severe sequelae, both cosmetic and functional. The therapy must be careful because severe long-term complications can occur. In this case report, the authors present a case of mandibular fracture in which the decision between surgical therapy and functional therapeutic regimen may be controversial due to the particular anatomy of the fracture line and the age of the patient.

  9. An unusual case report of bilateral mandibular radicular cysts

    Niyanta S Joshi

    2011-01-01

    Full Text Available A radicular cyst is one of the most common odontogenic cysts of anterior maxilla, not commonly seen in adolescence. Here, we present a rare, atypical case, of bilateral radicular cysts of the mandibular posterior region in a 13-year-old girl. The patient management comprised surgical enucleation of cystic sac under general anesthesia followed by rehabilitation of the same area. The purpose of this article is to lay emphasis on the pedodontist′s role in early diagnosis and treatment of such lesions.

  10. Bilateral fusion of permanent mandibular incisors: A case report

    Saxena A

    2008-05-01

    Full Text Available This case report showing a classical presentation of bilateral fusion of permanent mandibular incisors in a child patient for dental attention. Fusion defined as the merger of two adjacent tooth germs producing one tooth. These teeth may be fused by enamel, dentin, or both. The fused crown is broader than non fused adjacent teeth and thus resembles gemination. However, tooth counting reveals decreased numbers. Fused teeth are rare in the permanent dentition. The incisors are reported to be fused in primary and permanent dentition, but bilateral fusion is a rare occurrence. Hence the case report of bilateral fusion in an 11-year-old boy is presented.

  11. A Mandibular Second Premolar with Three Canals and Atypical Orifices

    Neha Agarwal

    2013-01-01

    Full Text Available Background: Mandibular second premolars with three canals (Type V, Vertucci and separate foramina are very rare. The anatomy of the pulp chamber floor in these premolars usually reveals one lingual and two buccal orifices at the same level. This case report describes a second premolar with three canals and an unusual pulpal floor anatomy with one mesiobuccal and one distobuccal orifice at the same level and an orifice on the distolingual wall. Very careful examination of the pulpal space with an optical device and preoperative spiral computed tomography is recommended to locate any unusual orifices.

  12. Avaliação do torque para inserção, remoção e fratura de diferentes mini-implantes ortodônticos Evaluation of insertion, removal and fracture torques of different orthodontic mini-implants in bovine tibia cortex

    Maria Fernanda Prates da Nova

    2008-10-01

    Full Text Available OBJETIVO: avaliar, em mini-implantes de diferentes dimensões, os seguintes fatores: (a torque de inserção, (b torque de remoção, (c torque de fratura, (d tensão cisalhante, (e tensão normal e (f tipo de fratura. METODOLOGIA: foram utilizados 20 mini-implantes autoperfurantes, 10 da marca SIN e 10 da Neodent com, respectivamente, 8 e 7mm de comprimento, todos com 1,6mm de diâmetro. Dos 10 mini-implantes de cada marca, 5 não possuíam perfil transmucoso e 5 tinham perfil de 2mm, formando 4 grupos: SIN sem perfil (SSP, SIN com perfil (SCP, Neodent sem perfil (NSP e Neodent com perfil (NCP. Todos os mini-implantes foram inseridos em cortical óssea e removidos com micromotor acoplado a um torquímetro. Os mini-implantes foram, também, submetidos ao ensaio de fratura. Os torques de inserção, remoção e fratura, assim como a tensão cisalhante e normal calculadas, foram comparados entre todos os grupos pela ANOVA. O tipo de fratura foi avaliado em microscópio eletrônico de varredura. RESULTADOS: verificou-se que o grupo NCP apresentou torque de inserção significativamente maior que os demais grupos, porém todos fraturaram durante a inserção (n = 2 ou remoção (n = 3. Não houve diferença entre os grupos para o torque de remoção. Para o grupo NSP, o torque de fratura foi significativamente menor do que todos os outros grupos. Todos os mini-implantes sofreram fratura do tipo dúctil. CONCLUSÃO: uma vez que não houve diferença na resistência mecânica de ambas as marcas, variando apenas a forma, conclui-se que a resistência à fratura pode ser afetada por esta variável.AIM: The purpose of this study was to evaluate mini-implants with different dimensions for the following factors: (a insertion torque, (b removal torque, (c fracture torque, (d shear tension, (e normal tension and (f type of fracture. METHODS: Twenty self-drilling mini-implants were used, 10 from SIN and 10 from Neodent, with 1.6mm in diameter and with 8 and 7

  13. Endodontic management of mandibular second premolar with three roots and three root canals: A case report

    Nidhi Shrivastava

    2014-01-01

    Full Text Available High level of success in endodontic treatment requires an understanding of root canal anatomy and morphology. The clinician must be prepared to identify those teeth that tend to vary generally from norm. Thorough debridement and obturation of such teeth can be challenging and failing to do so can lead to treatment failure. Mandibular premolars have earned the reputation for having aberrant anatomy. However, the occurrence of three separate canals with three separate foramina in mandibular premolars is very rare. The incidence of three canals is as high as 23% in mandibular first premolars, whereas in second premolars incidence is as low as 0.4%. Three rooted mandibular second premolar is reported to be 0.2%. This case report describes endodontic management of one such tooth with unusual morphological variations in canal anatomy of mandibular second premolar.

  14. [Inferior hemiarthroplasty of the temporo-mandibular joint with articulated condylar prosthesis type Stryker].

    Bucur, A; Dincă, O; Totan, C; Ghită, V

    2007-01-01

    The optimal reconstruction of the mandible and of the temporo-mandibular joint after mandibular hemi-resection with disarticulation is still controversial in literature. This paperwork presents our experience on four cases in the reconstruction of the mandible together with the inferior arthroplasty of the temporo-mandibular joint, after the resection of extended benign tumors of the mandible, based on fibular free vascularized grafts having attached a Stryker titanium condylar prosthesis reconstructing the inferior segment of the temporo-mandibular joint. Our results for the this technique were excellent, with a functional rehabilitation very close to normal. After reviewing the various techniques and their arguments in literature, with accent on the TMJ reconstruction, we consider this method to be optimal for the reconstruction of mandibular defects in patients with neoplastic conditions.

  15. Seating position, seat belt wearing, and the consequences in facial fractures in car occupants Posição no veículo, uso de cinto de segurança e suas conseqüências nas fraturas de face em ocupantes de carros

    Alexandre Siqueira Franco Fonseca

    2007-01-01

    fractures, not being effectively protected by the seat belt, although the wearing of seat belts seems to have a protective role against the occurrence of facial fractures in front-seat passengers. It was not possible to evaluate the wearing of seat belts among rear-seat passengers, even though the high incidence of fractures in this group showed its high susceptibility to the occurrence of facial fractures, which highlights the need of taking protective measures against this situation.INTRODUÇÃO: Os traumatismos devidos a acidentes de trânsito estão entre as principais etiologias na ocorrência de fraturas de face em todo o mundo. No entanto os mecanismos de trauma são diferentes, conforme o local onde o estudo foi realizado, devido a condições de desenvolvimento, legislação e cultura 1, 2, 3, 4. Com o objetivo de se conhecer a epidemiologia e os mecanismos envolvidos na ocorrência de fraturas de face em ocupantes de automóveis na região metropolitana de São Paulo, foi realizado um estudo retrospectivo entre Fevereiro de 2001 e Julho de 2006. MÉTODO: Foram coletados dados de 297 pacientes admitidos com fraturas de face na sala de emergência do HC-FMUSP. Destes, 151 indivíduos estiveram envolvidos em acidentes de trânsito sendo que 56 (37,08% estavam dentro de automóveis. Estes últimos foram agrupados baseados na posição em que estavam sentados no veículo no momento do acidente e no uso de cintos de segurança. Dados referentes ao número e localização dos traços de fratura foram obtidos nos diferentes grupos e um Índice Fraturas/Paciente (IF/P foi idealizado para comparar e avaliar o impacto nesses grupos, e para posteriormente serem analisados e discutidos. RESULTADO: Ocorreram 323 traços de fraturas nos 56 pacientes ocupantes de carros. Aplicando-se o IF/P obtivemos maiores valores no grupo de passageiros do banco traseiro sem cinto de segurança (7,23 fraturas/ paciente, seguido pelo grupo de motoristas sem cinto de segurança (6,33 fraturas

  16. Novel three dimensional position analysis of the mandibular foramen in patients with skeletal class III mandibular prognathism

    Kang, Sang Hoon; Kim, Yeon Ho; Won, Yu Jin; Kim, Moon Key

    2016-01-01

    To analyze the relative position of the mandibular foramina (MnFs) in patients diagnosed with skeletal class III malocclusion. Computed tomography (CT) images were collected from 85 patients. The vertical lengths of each anatomic point from the five horizontal planes passing through the MnF were measured at the coronoid process, sigmoid notch, condyle, and the gonion. The distance from the anterior ramus point to the posterior ramus point on the five horizontal planes was designated the anteroposterior horizontal distance of the ramus for each plane. The perpendicular distance from each anterior ramus point to each vertical plane through the MnF was designated the horizontal distance from the anterior ramus to the Mn F. The horizontal and vertical positions were examined by regression analysis. Regression analysis showed the heights of the coronoid process, sigmoid notch, and condyle for the five horizontal planes were significantly related to the height of the MnF, with the highest significance associated with the MnF-mandibular plane (coefficients of determination (R2): 0.424, 0.597, and 0.604, respectively). The horizontal anteroposterior length of the ramus and the distance from the anterior ramus point to the MnF were significant by regression analysis. The relative position of the MnF was significantly related to the vertical heights of the sigmoid notch, coronoid process, and condyle as well as to the horizontal anteroposterior length of the ascending ramus. These findings should be clinically useful for patients with skeletal class III mandibular prognathism

  17. Novel three dimensional position analysis of the mandibular foramen in patients with skeletal class III mandibular prognathism

    Kang, Sang Hoon; Kim, Yeon Ho; Won, Yu Jin; Kim, Moon Key [Dept. of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang (Korea, Republic of)

    2016-06-15

    To analyze the relative position of the mandibular foramina (MnFs) in patients diagnosed with skeletal class III malocclusion. Computed tomography (CT) images were collected from 85 patients. The vertical lengths of each anatomic point from the five horizontal planes passing through the MnF were measured at the coronoid process, sigmoid notch, condyle, and the gonion. The distance from the anterior ramus point to the posterior ramus point on the five horizontal planes was designated the anteroposterior horizontal distance of the ramus for each plane. The perpendicular distance from each anterior ramus point to each vertical plane through the MnF was designated the horizontal distance from the anterior ramus to the Mn F. The horizontal and vertical positions were examined by regression analysis. Regression analysis showed the heights of the coronoid process, sigmoid notch, and condyle for the five horizontal planes were significantly related to the height of the MnF, with the highest significance associated with the MnF-mandibular plane (coefficients of determination (R2): 0.424, 0.597, and 0.604, respectively). The horizontal anteroposterior length of the ramus and the distance from the anterior ramus point to the MnF were significant by regression analysis. The relative position of the MnF was significantly related to the vertical heights of the sigmoid notch, coronoid process, and condyle as well as to the horizontal anteroposterior length of the ascending ramus. These findings should be clinically useful for patients with skeletal class III mandibular prognathism.

  18. Redução de inóculo de Aphelenchoides besseyi em sementes de Brachiaria brizantha tratadas com óleos essenciais

    Thalita Suelen Avelar Monteiro

    2014-07-01

    Full Text Available Óleos essenciais foram testados com o objetivo de controlar Aphelenchoides besseyi em sementes de Brachiaria brizantha cv. 'Marandu'. Sementes naturalmente infestadas por A. besseyi foram tratadas com óleos essenciais de mostarda (Brassica nigra, canela (Cinnamomum zeylanicum, verbena (Lippia citriodora e Bioprotector (r (produto comercial composto por extratos e óleos essenciais derivados de plantas, nas concentrações de 0,5% e 1,0%. Avaliou-se também o efeito dos tratamentos após aplicação direta nos juvenis (ensaio in vitro. Todos os óleos tiveram sua efetividade reduzida no ensaio em semente (in vivo em relação ao ensaio in vitro. Os tratamentos não erradicaram o nematoide das sementes, sendo que os óleos essenciais de canela e verbena, nas concentrações 0,5% e 1,0%, Bioprotector (r a 1,0% e óleo de mostarda a 1,0% reduziram o nível populacional do nematoide em sementes contaminadas. O óleo de mostarda a 1,0% destacou-se dos demais por ter apresentado ação nematicida sem alterar a germinação das sementes.

  19. MODELADO DE LA CINÉTICA DE SECADO DE MANGO PRE-TRATADAS CON DESHIDRATACIÓN OSMÓTICA Y MICROONDAS

    MARIBEL GARCÍA-PATERNINA

    Full Text Available La aplicación de tecnologías complementarias como la deshidratación osmótica y microondas como pre-tratamientos al secado convencional contribuye al desarrollo de nuevos productos y favorece la disminución de los cambios físico-químicos y organolépticos en el mango. El objetivo del trabajo fue evaluar el efecto de la deshidratación osmótica con una solución a 65°Brix de 37 a 40°C por 60 min, tratamiento con microondas a 560 W por 7 min y combinado como pre-tratamientos al secado de hojuelas de mango a 70°C en una estufa tipo bandeja y al sol. Las muestras de mango con 11 a 14°Brix y humedad del 80% fueron dimensionadas a 1x1x0,4 cm. La pérdida de peso y el tiempo de secado en los pre-tratados presentaron diferencias significativas (p0,99 se ajustó para el secado sin pre-tratamiento y el modelo de Vermet et al. (R²>0,99 para los pre-tratados. La De ff para microondas y secado en estufa fue mayor. Las hojuelas de mango pre-tratadas con deshidratación osmótica fueron las que mejor conservaron la apariencia de las hojuelas de mango

  20. Fratura tipo explosão da coluna torácica e lombar: correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada

    Matheus Luís da Silva

    2013-01-01

    Full Text Available OBJETIVO: Analisar as fraturas tipo explosão da coluna torácica e lombar e fazer a correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada. MÉTODOS: Estudo retrospectivo de 72 pacientes com fraturas tipo explosão da coluna torácica e lombar. O estreitamento do canal vertebral, o colapso vertebral e a cifose local foram avaliados em três segmentos distintos: torácico, transição toracolombar e lombar. RESULTADOS: Houve diferença estatística significativa (p < 0,05 dos valores do estreitamento do canal vertebral e cifose local nos diferentes segmentos da coluna vertebral avaliados. CONCLUSÃO: As fraturas tipo explosão da coluna torácica e lombar, embora apresentem características semelhantes, independentemente do local de ocorrência, sofrem influência direta do segmento biomecânico sagital no que diz respeito às alterações estruturais que ocorrem na vértebra fraturada.

  1. Ihh signaling regulates mandibular symphysis development and growth.

    Sugito, H; Shibukawa, Y; Kinumatsu, T; Yasuda, T; Nagayama, M; Yamada, S; Minugh-Purvis, N; Pacifici, M; Koyama, E

    2011-05-01

    Symphyseal secondary cartilage is important for mandibular development, but the molecular mechanisms underlying its formation remain largely unknown. Here we asked whether Indian hedgehog (Ihh) regulates symphyseal cartilage development and growth. By embryonic days 16.5 to 18.5, Sox9-expressing chondrocytes formed within condensed Tgfβ-1/Runx2-expressing mesenchymal cells at the prospective symphyseal joint site, and established a growth-plate-like structure with distinct Ihh, collagen X, and osteopontin expression patterns. In post-natal life, mesenchymal cells expressing the Ihh receptor Patched1 were present anterior to the Ihh-expressing secondary cartilage, proliferated, differentiated into chondrocytes, and contributed to anterior growth of alveolar bone. In Ihh-null mice, however, symphyseal development was defective, mainly because of enhanced chondrocyte maturation and reduced proliferation of chondroprogenitor cells. Proliferation was partially restored in dual Ihh;Gli3 mutants, suggesting that Gli3 is normally a negative regulator of symphyseal development. Thus, Ihh signaling is essential for symphyseal cartilage development and anterior mandibular growth.

  2. Variable permanent mandibular first molar: Review of literature

    Ballullaya, Srinidhi V; Vemuri, Sayesh; Kumar, Pabbati Ravi

    2013-01-01

    Introduction: The success of root canal therapy depends on the locations of all the canals, thourough debridement and proper sealing. At times the clinicians are challenged with variations in morphology of root canal. This review article attempts to list out all the variations of permanent mandibular first molar published so for in the literature. Materials and Methods: An exhaustive search was undertaken using PUBMED database to identify published literature from 1900 to 2010 relating to the root canal morphology of permanent first molar by using key words. The selected artcles were obtained and reviewed. Results: Total ninty seven articles were selected out of which 50 were original article and forty seven were case reports. The incidence of third canal in mesial root was 0.95% to 15%. The incidence of three rooted mandibular first molar was 3% to 33%. Only ninety cases reported with c-shape canal configuration. Incidence of Taurodintism without congenital disorder was very rare. Conclusion: The root canal treatment requires proper knowlegde of variations in root canal morphology in order to recognise, disinfect and seal all portal of exit. This can be accomplished with proper diagnosis using newer modes, modification in access preparation, use of operating microscope, enhanced methods of disinfecting and sealing of all canals. PMID:23716959

  3. Assessment of skeletal maturation using mandibular second molar maturation stages.

    Goyal, S; Goyal, S; Gugnani, N

    2014-01-01

    To investigate the relationship between cervical vertebrae maturation and mandibular second molar calcification stages. The study was designed as a retrospective, descriptive and crosssectional research project. Pre-treatment lateral cephalograms and panoramic radiographs of 99 males and 110 females in the age range of 7 to 18 years 7 months were evaluated with Demirjian Index (DI) and cervical vertebrae maturation indicators (CVMI) of Hassel and Farman. A null hypothesis was proposed that there is no relation between CVMI and DI. A highly significant association (Pearson's contingency coefficient 0.713 for males and 0.863 for females) was found between DI and CVMI. In males, the DI stage E corresponded to stage 2 of CVMI (pre-peak of pubertal growth spurt) and DI stages F and G corresponded to stages 3 and 4 of CVMI (peak of pubertal growth spurt). DI stage H was associated with stages 5 and 6 of CVMI (end of pubertal growth spurt). In females, the DI stages C, D corresponded to CVMI stages 1, 2; DI stages E, F with CVMI stages 3, 4; DI stages G, H with CVMI stages 5, 6. Mandibular second molar calcification stages can be used as indicators for assessment of skeletal maturity.

  4. Piezosurgery versus Rotatory Osteotomy in Mandibular Impacted Third Molar Extraction

    Bhati, Bharat; Kukreja, Pankaj; Kumar, Sanjeev; Rathi, Vidhi C.; Singh, Kanika; Bansal, Shipra

    2017-01-01

    Aim: The aim of this study is to compare piezoelectric surgery versus rotatory osteotomy technique in removal of mandibular impacted third molar. Materials and Methods: Sample size of 30 patients 18 males, 12 females with a mean age of 27.43 ± 5.27. Bilateral extractions were required in all patients. All the patients were randomly allocated to two groups in one group, namely control group, surgical extraction of mandibular third molar was done using conventional rotatory osteotomy and in the other group, namely test group, extraction of lower third molar was done using Piezotome. Results: Parameters assessed in this study were – mouth opening (interincisal opening), pain (visual analog scale VAS score), swelling, incidence of dry socket, paresthesia and duration of surgery in both groups at baseline, 1st, 3rd, and 7th postoperative day. Comparing both groups pain scores with (P piezosurgery group (51.40 ± 17.9) minutes compared to the conventional rotatory group with a mean of (37.33 ± 15.5) minutes showing a statistically significant difference (P = 0.002). Conclusion: The main advantages of piezosurgery include soft tissue protection, optimal visibility in the surgical field, decreased blood loss, less vibration and noise, increased comfort for the patient, and protection of tooth structures. Therefore, the piezoelectric device was efficient in decreasing the short-term outcomes of pain and swelling although taking longer duration than conventional rotatory technique it significantly reduces the associated postoperative sequelae of third molar surgery. PMID:28713729

  5. Digital image processing of mandibular trabeculae on radiographs

    Ogino, Toshi

    1987-06-01

    The present study was aimed to reveal the texture patterns of the radiographs of the mandibular trabeculae by digital image processing. The 32 cases of normal subjects and the 13 cases of patients with mandibular diseases of ameloblastoma, primordial cysts, squamous cell carcinoma and odontoma were analyzed by their intra-oral radiographs in the right premolar regions. The radiograms were digitized by the use of a drum scanner densitometry method. The input radiographic images were processed by a histogram equalization method. The result are as follows : First, the histogram equalization method enhances the image contrast of the textures. Second, the output images of the textures for normal mandible-trabeculae radiograms are of network pattern in nature. Third, the output images for the patients are characterized by the non-network pattern and replaced by the patterns of the fabric texture, intertwined plants (karakusa-pattern), scattered small masses and amorphous texture. Thus, these results indicates that the present digital image system is expected to be useful for revealing the texture patterns of the radiographs and in the future for the texture analysis of the clinical radiographs to obtain quantitative diagnostic findings.

  6. Factors affecting root curvature of mandibular first molar

    Choi, Hang Moon; Yi, Won Jin; Heo, Min Suk; Kim, Jung Hwa; Choi, Soon Chul; Park, Tae Won

    2006-01-01

    To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Twenty six 1st graders whose mandibular 1st molars just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal place angle, gonial angle, and gonion-gnathion distance(Go-Gn distance) were measured. In panoramic radiograph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. The pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p 1 +0.745X 2 (Y: root angle, X 1 : variation of occlusal plane-tooth axis angle, X 2 : variation of ramus-occlusal plane angle). It was suspected that the reasons of root curvature were change of tooth axis caused by contact with 2nd deciduous tooth and amount of mesial and superior movement related to change of occlusal plane

  7. Implant-supported Mandibular Overdentures in Very Old Adults

    Müller, F.; Duvernay, E.; Loup, A.; Vazquez, L.; Herrmann, F.R.; Schimmel, M.

    2013-01-01

    The purpose of this study was (1) to investigate denture satisfaction following the conversion of existing mandibular complete dentures to implant overdentures (IOD) in very old edentulous patients who depend on help for activities of daily living and (2) to evaluate secondary end points, such as functional, structural, nutritional, and patient-centered aspects. For this randomized clinical trial, 2 interforaminal short implants were placed in the intervention group (n = 16, 85.0 ± 6.19 yrs) to retain mandibular IODs; the control group (n = 18, 84.1 ± 5.55 yrs) received conventional relines. During the first year, no implant was lost; however, 2 patients died. IODs proved more stable, and participants in the intervention group demonstrated significantly higher denture satisfaction as well as an increased oral health–related quality of life compared to the control group. Maximum voluntary bite force improved significantly with IODs, yet the chewing efficiency was not different between groups. Masseter muscle thickness increased with IODs, mainly on the preferred chewing side. Body mass index decreased in both groups, but the decline tended to be smaller in the intervention group; blood markers and the Mini Nutritional Assessment did not confirm this tendency. These results indicate that edentulous patients who depend on help for activities of daily living may benefit from IODs even late in life (ClinicalTrial.gov NCT01928004). PMID:24158342

  8. Marginal mandibular branch of the facial nerve: An anatomical study

    Ayman Ahmad Khanfour

    2014-06-01

    Results: Results showed that the (MMBFN arises as a single branch, two branches, and three branches in 36.7%, 43.3% and 20% of specimens, respectively. In 83.3% of cases, one of the main or secondary branches of the marginal mandibular nerve crosses superficial (lateral to the facial vessels. There are communications either between the main or the secondary branches of the marginal mandibular nerve itself in 53.6% of specimens and with the buccal branch of the facial nerve in 40%, also with the anterior branch of the great auricular nerve in 3.3%, and with the transverse cervical nerve in 3.3% of specimens. The relationship of the nerve to the lower border of the mandible at a point midway between the angle of the mandible and symphysis menti is variable; it is either totally above it in most of the specimens 80%, or below it in 10% or at it in the remaining 10% of the specimens. The branches that lie above the lower border of the mandible are always deep into the superficial layer of the parotid fascia, while those branches that lie below the lower border of the mandible are intrafascially. The termination of the nerve is deep into the muscles of the ipsilateral lower lip in all specimens.

  9. Root canal morphology and variations of mandibular premolars by clearing technique: an in vitro study.

    Parekh, Vaishali; Shah, Nimisha; Joshi, Hardik

    2011-07-01

    The aim of this study was to compare internal anatomy between first and second mandibular premolars and to study different percentage variations of root canal morphology of mandibular premolars in Gujarat population based on Vertucci's classification by clearing technique. A total of 80 extracted intact permanent mandibular premolars (40 each mandibular first premolar and mandibular second premolar) with fully formed apices were collected. Access cavity was prepared with endo access kit, all samples were placed in 2.5% sodium hypochlorite for 48 hours, after that all samples were washed in running water for 2 hours. After washing, all samples were transferred to 5% nitric acid, for decalcification, for 72 hours, with the acid being changed every 24 hours and stirred once every 8 hours. All samples were washed in running water and dehydrated using ascending grades (70%, 80%, 90% and 100%) of isopropyl alcohol for 2 days. Finally, they were rendered transparent by immersion in methyl salicylate for 15 minutes and then India ink dye was injected into the access cavity. The anatomy of the root canal was observed and classified based on the Vertucci's classification. Parametric Z-test was used to compare the variation between mandibular first and second premolars. In mandibular first premolar, type 1 was found in 20%, type 2 was 5%, type 3 was 5%, type 4 was 25%, type 5 was 12.5% and type 6 was 2.5% of total samples. Whereas, in mandibular second premolar, type 1 was found in 80% out of all samples, type 4 was 2.5%, type 5 was 17.5%. Type 2, type 3, type 6, type 7 and type 8 were not found in this study. Mandibular first premolar showed higher variation (75%) compared to mandibular second premolar (37.5%). The knowledge of variations in the root canal morphology of the mandibular premolars can enhance the level of endodontic treatment of mandibular premolars. Root canal morphology, Vertucci's classification, Clearing technique. How to cite this article: Parekh V, Shah N

  10. Neurovascular Content of the Mandibular Canal and Its Clinical Relevance: A Literature Review of the Related Anatomical and Radiological Studies

    Eliades Apostolos N.

    2014-11-01

    Full Text Available In literature, anatomical variations of the inferior alveolar nerve branches (infratemporal, extraosseous and intraosseous are reported and their importance in clinical practice is discussed too. The spatial vessels’ position in relationship with the nerve in the mandibular canal was explored, which is of clinical significance in impacted third molar and implant surgery. It is believed that the neurovascular content of the main mandibular canal follows any variations of the mandibular canal i.e. bifid mandibular, retromolar and accessory mental canals. Retrospective studies and case reports reported the presence of multiple foramina on the medial surface of the ramus, near the main mandibular foramen. In some cases, one supplementary mandibular foramen was found to be connected with the lower third molar, which is called “temporal crest canal”. Others found an accessory mandibular foramen that led into a second mandibular canal which joined the main mandibular canal (double anteriorly. The bony canals contained a terminal branch of the anterior trunk of the mandibular nerve or a branch of inferior alveolar nerve before it entered the mandibular foramen.

  11. Three-dimensional analysis of morphological changes of rat mandibular head induced by administration of adjuvant in mandibular joint cavity

    Kuroki, Yosuke

    2008-01-01

    Temporal morphological changes of human osteoarthritis (OA) related to temporomandibular joint dysfunction (TMJ) are unknown because of lack of the animal model. The author made the model as in the title. Complete Freud's adjuvant (CFA) was injected in the mandibular joint cavity of male standard deviation (SD) rats with monitoring by X-ray. The site of injection was determined previously with the machine RmCT (in vivo 3D micro-X-ray CT for laboratory animals, Rigaku Corp.), which consisted of rotatable X-ray tube and facing flat panel detector, at whose center anesthetized rat was placed. The machine was also used for observation of the mandible just and 1-14 days after CFA injection and images were processed to 2D and 3D with the software I-view-R (Rigaku Corp.). Morphological changes were seen at 7-14 days on the CT images, and pathologically at 14 days, erosion or osteophytosis in 9/12 animals and enlargement of mandibular head. The cavity treated became larger for 1-14 days persistently. These results indicated that morphological changes accompanying the chronic inflammation had occurred, which was thought useful as a model of TMJ-OA. (R.T.)

  12. Visibility of the mandibular canal on cross-sectional CBCT images at impacted mandibular third molar sites

    Alkhader, Mustafa; Jarab, Fadi

    2016-01-01

    The aim of the present study was to assess visibility of the mandibular canal (MC) on cross-sectional cone beam CT (CBCT) images at impacted mandibular third molar (IMTM) sites. CBCT images for 150 IMTMs were selected for the study. The type of tooth impaction (horizontal, vertical, mesial and distal) and location of the MC (inferior in contact and superimposed) were evaluated on pseudo panoramic images. Cross-sectional images were generated and two observers evaluated the location of the MC (buccal, lingual, inter-radicular and inferior) and its visibility using 3-point scoring scale: (1-3, good-excellent). Kruskal-Wallis test was used to examine the differences in the visibility of the MC according to its location and the type of tooth impaction. The visibility scores of the MC were good, very good and excellent at 3, 25 and 122 IMTM sites, respectively. There were no statistically significant differences in the visibility scores of the MC according to its location or the type of tooth impaction (P < 0.05). Therefore, despite the different locations of the MC and different types of tooth impaction at IMTM sites, the visibility of the MC was excellent on most of the cross-sectional CBCT images. CBCT is considered a valuable diagnostic tool for achieving these results

  13. The correlationship between mandibular radiomorphometric indices in panorama and bone mineral density in Cu-equivalent image of intraoral film

    Kim, Jae Duk

    2003-01-01

    To determine whether the mandibular radiomorphometric indices in panoramic radiography are correlated with the bone mineral density of Cu-equivalent images in intraoral film. The bone mineral density (BMD) of the mandibular premolar area was measured in the Cu-equivalent image of intraoral film. The Panoramic Mandibular Index (PMI) and Mandibular Cortical Width (MCW) were measured in panoramic radiographs of six dry mandibles, and the Pearson correlation between PMI, MCW, and BMD were tested. There were no significant correlations between PMI and BMD (r=0.280), nor between MCW and BMD (r=0.237). The results show that PMI and MCW were poor diagnostic indicators of mandibular BMD in the six dry mandibles used in this study. The correlationship between the mandibular radiomorphometric indices (PMI and MCW) and mandibular BMD needs to be researched further using large in vivo patient samples.

  14. Maxillary-driven simultaneous maxillo-mandibular distraction for hemifacial microsomia.

    Nakajima, Hideo; Sakamoto, Yoshiaki; Tamada, Ikkei; Ogata, Hisao; Kishi, Kazuo; Sakamoto, Teruo

    2011-12-01

    We treat hemifacial microsomia with a combination of surgery and orthodontic treatment during the growth period, resulting in early improvement in facial asymmetry and the induction of normal growth. We previously used gradual distraction of the mandibular ramus for Pruzansky's type II classification (Pruzansky, 1969). In type II cases, the maxilla should also be treated actively as, using this technique, improvement of the occlusal plane is difficult to achieve, resulting in a cross bite and difficulties in post-operative orthodontic treatment-especially in older patients. Morphologically, the mandibular angle region of the operative side is flat, and the angle of the mouth remains elevated. We performed mandibular-driven simultaneous maxillo-mandibular distraction while the occlusion was maintained using intermaxillary anchorage. However, mandibular-driven distraction tended to elongate the face because the mandible only elongated downwards and the mandibular ramus did not reach the glenoid. Furthermore, external distraction devices produce significant distress for patients until removal of the device and cause scars on the face. We developed a new internal distraction device with a variable angle and performed maxillary-driven simultaneous maxillo-mandibular distraction using this device. The result was morphologically satisfactory and solved the above problems. Because the patient was in the growth period, careful follow-up and induction to normal growth were important while the inferior growth of the affected side was monitored. Copyright © 2010 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  15. Mastication markedly affects mandibular condylar cartilage growth, gene expression, and morphology.

    Enomoto, Akiko; Watahiki, Junichi; Nampo, Tomoki; Irie, Tarou; Ichikawa, Yuuta; Tachikawa, Tetsuhiko; Maki, Koutaro

    2014-09-01

    Mandibular growth is believed to be strongly related to mastication. Furthermore, mandibular condylar cartilage is known to be derived from neural crest cells. We examined whether the degree of chewing affects condylar cartilage growth of the mandible. Mice were fed diets with varying hardness. Genes specific to neural crest-derived cells were measured by real-time polymerase chain reaction to compare the expression changes between the mandibular and tibia cartilages. The mandibular condylar cartilage was then evaluated histologically, and proliferation was evaluated using proliferating cell nuclear antigen. Immunostaining was conducted for osteopontin, type X collagen, and Musashi1, and real-time polymerase chain reaction was used to assess the expression levels of osteopontin and type X collagen. Markers including P75, Wnt-1, Musashi1, and Nestin were upregulated in the mandibular condylar cartilage as compared with the tibial cartilage. Histologic assessment of the mandibular cartilage showed that the hypertrophic chondrocyte zone was statistically significantly thicker in mice fed a hard diet. Chondrocyte proliferation and Musashi1 expression were lower in mice fed a hard diet. After 4 weeks, numerous osteopontin and type X collagen-positive cells were observed in mice fed a mixed diet. Mastication affects the balance between differentiation and proliferation in the mandibular condylar cartilage. This phenomenon might be attributed to the presence of neural crest-derived cells. Copyright © 2014 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  16. Relationship of maxillary 3-dimensional posterior occlusal plane to mandibular spatial position and morphology.

    Coro, Jorge C; Velasquez, Roberto L; Coro, Ivette M; Wheeler, Timothy T; McGorray, Susan P; Sato, Sadao

    2016-07-01

    The purpose of this study was to examine the relationship of the 3-dimensional (3D) posterior occlusal plane (POP) and the mandibular 3D spatial position. The relationship of the POP to mandibular morphology was also investigated. Retrospective data from a convenience sample of pretreatment diagnostic cone-beam computed tomography scans were rendered using InVivo software (Anatomage, San Jose, Calif). The sample consisted of 111 subjects (51 male, 60 female) and included growing and nongrowing subjects of different races and ethnicities. The 3D maxillary POP was defined by selecting the cusp tips of the second premolars and the second molars on the rendered images of the subjects. The angles made by this plane, in reference to the Frankfort horizontal plane, were measured against variables that described the mandibular position in the coronal, sagittal, and axial views. The POP was also compared with bilateral variables that described mandibular morphology. There were significant differences of the POP among the different skeletal malocclusions (P <0.0001). The POP showed significant correlations with mandibular position in the sagittal (P <0.0001), coronal (P <0.05), and axial (P <0.05) planes. The POP also showed a significant correlation with mandibular morphology (P <0.0001). These findings suggest that there is a distinct and significant relationship between the 3D POP and the mandibular spatial position and its morphology. Copyright © 2016 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  17. Assessment of Growth Using Mandibular Canine Calcification Stages and Its Correlation with Modified MP3 Stages.

    Nayak, Reshma; Nayak, Us Krishna; Hegde, Gautam

    2010-01-01

    Orthodontic diagnosis and treatment planning for growing children must involve growth prediction, especially in the treatment of skeletal problems. Studies have shown that a strong association exists between skeletal maturity and dental calcification stages. The present study was therefore taken up to provide a simple and practical method for assessing skeletal maturity using a dental periapical film and standard dental X-ray machine, to compare the developmental stages of the mandibular canine with that of developmental stages of modified MP3 and to find out if any correlation exists, to determine if the developmental stages of the mandibular canine alone can be used as a reliable indicator for assessment of skeletal maturity. A total of 160 periapical radiographs (80 males and 80 females), of the mandibular right canine and the MP3 region was taken and assessed according to the Dermirjian's stages of dental calcification and the modified MP3 stages. The correlation between the developmental stages of MP3 and the mandibular right canine in male and female groups, is of high statistical significance (p = 0.001). The correlation coefficient between MP3 stages and developmental stages of mandibular canine and chronological age in male and females was found to be not significant. The correlation between the mandibular canine calcification stages and MP3 stages was found to be significant. The developmental stages of the mandibular canine could be used very reliably as a sole indicator for assessment of skeletal maturity.

  18. Prevalence and features of distolingual roots in mandibular molars analyzed by cone-beam computed tomography

    Choi, Mi Ree; Moon, Young Mi; Seo, Min Seock

    2015-01-01

    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

  19. Aesthethic and masticatory rehabilitation on post mandibular resection with combination of hollow obturator and hybrid prosthesis

    Arif Rachman

    2009-06-01

    Full Text Available Background: Replacing tooth lost caused by caries, periodontal disease, trauma and neoplasm including ameloblastoma which requires mandibular resection is important. Purpose: The aim of the study to rehabilitation of post mandibular resection with combination of hollow obturator and hybrid prosthesis. Case: A patient 25 years old, male, for having prosthesis to cover defect due to post right mandibular resection. Case Management: In this presented case, mandibular plate was applied due to spreading defect with losing almost a half body of mandible (class II modification 2 according to cantor and curtis classification. The design of therapy was mandibular obturator using hybrid prosthesis (removable partial denture metal frame and fixed splint crown with precision attachment with hollow obturator. The application was based on several advantages: good aesthetic performance, retention, stability, lighter weight and equal share of vertical load for teeth on non surgical site. The result of control I, II, III, showed that aesthetic performance, masticatory function, speech and swallowing were in good condition. Conclusion: The design of mandibular obturator using hybrid denture with hollow obturator could rehabilitate aesthetic performance, masticatory function, speech and swallowing for patient with post mandibular resection.

  20. A randomized clinical trial comparing mandibular incisor proclination produced by fixed labial appliances and clear aligners.

    Hennessy, Joe; Garvey, Thérèse; Al-Awadhi, Ebrahim A

    2016-09-01

    To compare the mandibular incisor proclination produced by fixed labial appliances and third generation clear aligners. Patients underwent a course of orthodontic treatment using either fixed labial appliances or clear aligners (Invisalign). Mandibular incisor proclination was measured by comparing pretreatment and near-end treatment lateral cephalograms. Eligibility criteria included adult patients with mild mandibular incisor crowding (clear aligner group. Baseline characteristics were similar for both groups: Fixed appliance mean crowding was 2.1 ± 1.3 mm vs clear aligner mean crowding, 2.5 ± 1.3 mm; pretreatment mean mandibular incisor inclination for the fixed appliance group was 90.8 ± 5.4° vs 91.6 ± 6.4° for the clear aligner group. Fixed appliances produced 5.3 ± 4.3° of mandibular incisor proclination. Clear aligners proclined the mandibular incisors by 3.4 ± 3.2°. The difference between the two groups was not statistically significant (P > .05). There was no difference in the amount of mandibular incisor proclination produced by clear aligners and fixed labial appliances in mild crowding cases.

  1. Restricted Mandibular Movement Attributed to Ossification of Mandibular Depressors and Medial Pterygoid Muscles in Patients With Fibrodysplasia Ossificans Progressiva: A Report of 3 Cases.

    Okuno, Tetsuko; Suzuki, Hitoshi; Inoue, Akio; Kusukawa, Jingo

    2017-09-01

    Fibrodysplasia ossificans progressiva (FOP) is an extremely rare genetic condition characterized by congenital malformation and progressive heterotopic ossification (HO) caused by a recurrent single nucleotide substitution at position 617 in the ACVR1 gene. As the condition progresses, HO leads to joint ankylosis, breathing difficulties, and mouth-opening restriction, and it can shorten the patient's lifespan. This report describes 3 cases of FOP confirmed by genetic testing in patients with restricted mouth opening. Each patient presented a different onset and degree of jaw movement restriction. The anatomic ossification site of the mandibular joint was examined in each patient using reconstructed computed tomographic (CT) images and 3-dimensional reconstructed CT (3D-CT) images. A 29-year-old woman complained of jaw movement restriction since 13 years of age. 3D-CT image of the mandibular joint showed an osseous bridge, formed by the mandibular depressors that open the mouth, between the hyoid bone and the mentum of the mandible. A 39-year-old man presented with jaw movement restriction that developed at 3 years of age after a mouth injury. 3D-CT image of the jaw showed ankylosis of the jaw from ossification of the mandibular depressors that was worse than in patient 1. CT images showed no HO findings of the masticatory muscles. To the authors' knowledge, these are the first 2 case descriptions of the anatomic site of ankylosis involving HO of the mandibular depressors in the jaw resulting from FOP. In contrast, a 62-year-old bedridden woman with an interincisal distance longer than 10 mm (onset, 39 years of age) had no HO of the mandibular depressors and slight HO of the medial pterygoid muscle on the right and left sides. These findings suggest that restricted mouth opening varies according to the presence or absence of HO of the mandibular depressors. Copyright © 2017. Published by Elsevier Inc.

  2. Deformidade angular do rádio e da ulna tratada pela distração osteogênica percutânea dinâmica - Relato de caso

    Rezende C.M.F.

    2000-01-01

    Full Text Available O exame de um cão de quatro meses de idade, macho, sem raça definida, com peso de 5,7kg mostrou que ele se apoiava com os cotovelos e apresentava desvio acentuado bilateral do rádio e da ulna. Ao exame radiográfico, observou-se fratura proximal bilateral do rádio. Após avaliações clínica e radiológica foi indicada a osteotomia corretiva e distração osteogênica do membro anterior esquerdo. O procedimento cirúrgico constou de osteotomia na diáfise proximal do rádio e ulna e emprego de fixadores externos compostos por quatro pinos de Kirschner e duas barras metálicas rosqueadas, configurando um fixador tipo II, bilateral uniplanar dinâmico. Antes da fixação dos pinos com acrílico, os fragmentos ósseos fraturados foram separados em aproximadamente 0,5cm. Após 10 dias, iniciou-se a distração de 1,0mm/dia durante 30 dias. A consolidação da fratura foi observada radiograficamente aos 67 dias após a intervenção, quando o aparelho foi removido. Procedimento semelhante foi realizado no membro anterior direito, quando o animal se encontrava com 16 meses de idade. Foi necessária a retirada de uma cunha óssea de aproximadamente 1,0cm para a correção angular. Atualmente, o cão mostra apoio normal do membro anterior esquerdo e discreto desvio valgus do direito devido à quebra do implante.

  3. Regenerative approach to bilateral rostral mandibular reconstruction in a case series of dogs

    Boaz eArzi

    2015-03-01

    Full Text Available Extensive rostral mandibulectomy in dogs typically results in instability of the mandibles that may lead to malocclusion, difficulty in eating and drinking, food prehension, and pain of the temporomandibular joint. Large rostral mandibular defects are challenging to reconstruct due to the complex geometry of this region. In order to restore mandibular continuity and stability following extensive rostral mandibulectomy, we developed a surgical technique using a combination of intraoral and extraoral approaches, a locking titanium plate and a compression resistant matrix (CRM infused with rhBMP-2. Furthermore, surgical planning that consisted of computed tomographic (CT scanning and 3D model printing were utilized. We describe a regenerative surgical technique for immediate or delayed reconstruction of critical-size rostral mandibular defects in 5 dogs. Three dogs had healed with intact gingival covering over the mandibular defect and had immediate return to normal function and occlusion. Two dogs had the complication of focal plate exposure and dehiscence, which was corrected with mucosal flaps and suturing; these dogs have since healed with intact gingival covering over the mandibular defect. Mineralized tissue formation was palpated clinically within 2 weeks and solid bone formation within 3 months. Computed tomography findings at 6 months postoperatively demonstrated that the newly regenerated mandibular bone had increased in mineral volume with evidence of integration between the native bone, new bone and CRM compared to the immediate postoperative CT. We conclude that rostral mandibular reconstruction using a regenerative approach provides an excellent solution for restoring mandibular continuity and preventing mandibular instability in dogs.

  4. Epidemiology of Surgically Managed Mandibular Condylar Fractures at a Tertiary Referral Hospital in Urban Southwest China.

    Thapa, Swosti; Wang, Jun; Hu, Hong-Tao; Zhang, Fu-Gui; Ji, Ping

    2017-01-01

    Mandibular condylar fracture is one of the commonest maxillofacial fractures treated by maxillofacial surgeons. Demography of the patients, causation, and characteristics of the fracture depends on various socio-economic factors. Hence, maxillofacial surgeons should be familiar with epidemiology of mandibular condylar fracture. This study retrospectively describes the demography, etiology, fracture characteristics, and hospital utilization of surgically treated mandibular condylar fractures in a tertiary referral hospital in urban China in past five years. Data of all patients who underwent surgical management between 2011 and 2015 were collected. This included aetiology, characteristics of fracture, time, age, sex, associated injuries, and hospital utilization of 166 patients with 208 mandibular condylar fractures. These patients had undergone open reduction and internal fixation with either miniplates or lag screws. Among the fracture of head of mandibular condyle, 21.28% of the patients had the fracture segments removed. These data were statistically analyzed to describe the epidemiology of mandibular condylar fracture. Most of the patients had unilateral mandibular condylar fractures (74.7%). Male patients (76.51%) outnumbered female patients (23.49%) in this cohort. The average age of the patients was 37 years. The fractures were mostly caused by fall from height (60.84%) and were located at the condylar neck (53.61%). Most of the patients had other associated maxillofacial injuries (71.08%) which were mostly located at symphysis and parasymphysis (44.59%). It took 12.58 +/- 0.35 days of hospitalization for the treatment. Fall from height was the most prevalent cause of mandibular condylar injury in mountainous urban China. The people at highest risk were middle-aged men. Mandibular condylar fracture was mostly located at the condylar neck and was usually associated with fracture at the symphysis and parasymphysis.

  5. Redução fechada e fixação esquelética externa tipo II para o tratamento de fraturas de tibiotarso em pombos domésticos (Columba livia Closed reduction and type-II external skeletal fixation for treatment of tibiotarsus fractures in domestic pigeons (Columba livia

    Marcelo Meller Alievi

    2001-12-01

    Full Text Available A redução fechada e o fixador esquelético externo tipo II foram avaliados para o tratamento de fraturas de tibiotarso em pombos domésticos (Columba livia. Foram utilizadas doze aves adultas. Os pombos foram anestesiados com a associação de xilazina e cetamina e, em seguida, foi realizada fratura do tibiotarso direito através de pressão digital sobre a diáfise do membro. Quatro pinos de Kirschner, dois proximais e dois distais ao foco da fratura, foram inseridos através de ambas as corticais ósseas e, após redução fechada da fratura, conectados externamente por duas barras de acrílico autopolimerizável, uma na face lateral e outra na face medial do membro. Em cinco aves, foi observado radiograficamente desvio ósseo angular, porém, a função do membro não foi afetada. O tempo médio e o desvio padrão para a cicatrização óssea foram 24,8 ± 4,89 dias. Os resultados demonstram que a redução fechada e o fixador esquelético externo tipo II são efetivos para o tratamento de fraturas de tibiotarso em pombos domésticos (Columba livia.The aim of this study was to evaluate the use of closed reduction and type-II external skeletal fixation for treatment of tibiotarsus fractures in domestic pigeons (Columba livia. Twelve adult domestic pigeons were used. Anesthesia was induced with xylazine and ketamine hydrochloride; the right tibiotarsus was manually fractured by digital pressure applied at the mid-diaphysis. Four Kirschner wires were placed through both cortices of the bone, two proximal and two distal to the fracture site, and, after closed reduction of the fracture, they were stabilized by two acrilic bars, one in the lateral and another in the medial surface of the tibiotarsus. Abnormalities in bone angulation were observed radiographically in five birds; however, the function of the limb was not noticeably impaired. The mean time ± standard deviation for fracture healing was 24.8 ± 4.89 days. The results of this

  6. Retroauricular transmeatal approach to manage mandibular condylar head fractures.

    Benech, Arnaldo; Arcuri, Francesco; Baragiotta, Nicola; Nicolotti, Matteo; Brucoli, Matteo

    2011-03-01

    There is a multitude of reported surgical approaches and technical variants with some unresolved technical problems to gain direct access to mandibular condylar head fractures; they can be divided into 2 groups: intraoral and extraoral. In 2005, Neff et al (Mund Kiefer Gesichtschir 2005;9:80), supported by a previous experimental work, reported a successful clinical study of condylar head fractures treated by a retroauricular approach; this article is in German, and the later English-language literature does not mention about this approach to open reduction and internal fixation of mandibular condylar fractures. The retroauricular transmeatal access, selected and performed by the senior author to treat 14 patients affected by highly located condylar head fracture, is illustrated in details. We collected data of 14 consecutive adult patients who, after the discussion about all options, had consented to have 16 mandibular condylar head fractures treated with open reduction and internal fixation by miniplates and screws via a retroauricular transmeatal approach. We exposed the temporomandibular joint area easily and better by dissecting via a retroauricular route with identification, ligation, and transection of the retromandibular vein; because of the posterior access, the frontal branch of the facial nerve and the auriculotemporal nerve are located and protected within the substance of the anteriorly retracted flap, superficial to the retromandibular vein. The follow-up clinical examination showed temporary weakness of the frontal branch of the facial nerve in 1 case with a recovery to normal function of 1.6 months; no patients had permanent weakness of the facial nerve or injury of the auriculotemporal nerve. There was absence of any salivary fistula, sialocele, and Frey syndrome; hearing was preserved in all cases, without any auditory stenosis or aesthetic deformity, and there was absence of any infections, hematoma, or scarring. Retroauricular approach provides

  7. Efectos de los aparatos propulsores mandibulares fijos en la articulación temporomandibular

    Palomino-Gómez, Sandra P; Almeida, Kelei M; de Mello, Patricia B; Restrepo, Manuel; Ravelr, Dirceu B

    2014-01-01

    Resumen Los aparatos propulsores mandibulares fijos son una alternativa en el tratamiento de la maloclusión Clase II con deficiencia mandibular. La propiedad de ser fijo, condiciona a la mandíbula a una posición anterior forzada en reposo y durante todas las funciones mandibulares. Cuando se utiliza un aparato de propulsión, la mandíbula se desplaza hacia delante y hacia abajo. Este movimiento conduce a una nueva posición al cóndilo, que puede afectar el funcionamiento normal de la articulaci...

  8. Correlation between mandibular gland secretion and cuticular hydrocarbons in the stingless bee Melipona quadrifasciata.

    Cruz-Landim, C; Ferreira-Caliman, M J; Gracioli-Vitti, L F; Zucchi, R

    2012-04-19

    We investigated whether Melipona quadrifasciata worker mandibular gland secretions contribute directly to their cuticular hydrocarbon profile. The mandibular gland secretion composition and cuticular surface compounds of newly emerged worker bees, nurse bees, and foragers were determined by gas chromatography and mass spectrometry and compared. Both the mandibular gland secretions and the cuticular surface compounds of all worker stages were found to be composed almost exclusively of hydrocarbons. Although the relative proportion of hydrocarbons from the cuticular surface and gland secretion was statistically different, there was a high similarity in the qualitative composition between these structures in all groups of bees.

  9. Prolonged vertigo and ataxia after mandibular nerve block for treatment of trigeminal neuralgia

    Arvind Chaturvedi

    2011-01-01

    Full Text Available Common complications of neurolytic mandibular nerve block are hypoesthesia, dysesthesia, and chemical neuritis. We report a rare complication, prolonged severe vertigo and ataxia, after neurolytic mandibular blockade in a patient suffering from trigeminal neuralgia. Coronoid approach was used for right sided mandibular block. After successful test injection with local anesthetic, absolute alcohol was given for neurolytic block. Immediately after alcohol injection, patient developed nausea and vomiting along with severe vertigo, ataxia and hypertension. Neurological evaluation was normal except for the presence of vertigo and ataxia. Computerised tomography scan brain was also normal. Patient was admitted for observation and symptomatic treatment was given. Vertigo and ataxia gradually improved over 24 hours.

  10. Prolonged vertigo and ataxia after mandibular nerve block for treatment of trigeminal neuralgia.

    Chaturvedi, Arvind; Dash, Hh

    2011-07-01

    Common complications of neurolytic mandibular nerve block are hypoesthesia, dysesthesia, and chemical neuritis. We report a rare complication, prolonged severe vertigo and ataxia, after neurolytic mandibular blockade in a patient suffering from trigeminal neuralgia. Coronoid approach was used for right sided mandibular block. After successful test injection with local anesthetic, absolute alcohol was given for neurolytic block. Immediately after alcohol injection, patient developed nausea and vomiting along with severe vertigo, ataxia and hypertension. Neurological evaluation was normal except for the presence of vertigo and ataxia. Computerised tomography scan brain was also normal. Patient was admitted for observation and symptomatic treatment was given. Vertigo and ataxia gradually improved over 24 hours.

  11. Transmigration of Mandibular Canine: Report of Four Cases and Review of Literature

    Gaurav Sharma

    2011-01-01

    Full Text Available Transmigration of canine is a rare phenomenon. The prevalence of transmigration of mandibular canine has been found to be only 0.14%–0.31%. The treatment of impacted transmigrated canine is very complicated if it is diagnosed at a later stage. We report 4 cases of transmigration of mandibular canine and review the literature regarding the etiology and treatment. Panoramic radiograph should be taken during the mixed dentition period if the mandibular canine has not erupted from more than one year from its normal chronological age of eruption as intraoral periapical radiograph examination will not always detect an impacted or transmigrated canine.

  12. Recurrent simple bone cyst of the mandibular condyle: a case report

    Kim, Kyung A; Koh, Kwang Joon [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, and Institute of Oral Bio Science, Chonbuk National University, Jeonju (Korea, Republic of)

    2013-03-15

    Cysts of the mandibular condyle are rare and can be difficult to diagnose and treat. Clinically, a simple bone cyst is asymptomatic and often discovered incidentally on routine radiographic examination. This report shows an atypical simple bone cyst occurring in the mandibular condyle showing recurrence after surgical curettage. Radiologically, this lesion involving the mandibular condyle should be distinguished from other similar lesions such as a chondriome, a central giant cell granuloma, and an aneurysmal bone cyst. Radiographic assessment was useful for forecasting the prognosis of a simple bone cyst. Possible reasons for the recurrence were discussed radiographically.

  13. Simplified Technique for Incorporating a Metal Mesh into Record Bases for Mandibular Implant Overdentures.

    Godoy, Antonio; Siegel, Sharon C

    2015-12-01

    Mandibular implant-retained overdentures have become the standard of care for patients with mandibular complete edentulism. As part of the treatment, the mandibular implant-retained overdenture may require a metal mesh framework to be incorporated to strengthen the denture and avoid fracture of the prosthesis. Integrating the metal mesh framework as part of the acrylic record base and wax occlusion rim before the jaw relation procedure will avoid the distortion of the record base and will minimize the chances of processing errors. A simplified method to incorporate the mesh into the record base and occlusion rim is presented in this technique article. © 2015 by the American College of Prosthodontists.

  14. Treating dental crowding with mandibular incisor extraction in an Angle Class I patient

    Gislana Braga Machado

    2015-06-01

    Full Text Available Mandibular dental crowding often encourages patients to seek orthodontic treatment. The orthodontist should decide between protrusion of incisors or decrease in dental volume so as to achieve proper alignment and leveling. The present study reports the treatment of an Angle Class I malocclusion adolescent female brachyfacial patient with severe mandibular dental crowding, increased curve of Spee and deep overbite. The patient was treated with extraction of a mandibular incisor. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the title of certified by the BBO.

  15. Fractografia de compósito estrutural aeronáutico submetido à caracterização de tenacidade à fratura interlaminar em modo I Fractography of aeronautical composite structures submitted to mode I interlaminar fracture toughness characterization

    Geraldo Maurício Cândido

    2012-01-01

    Full Text Available Muitos componentes das modernas aeronaves estão sendo manufaturados em compósitos poliméricos. Laminados de resina epóxi modificada reforçada com fibras de carbono contínuas são empregados em estruturas primárias e secundárias para reduzir o peso e melhorar o desempenho operacional. Porém, se ocorrer uma falha circunstancial, o processo de fratura desses laminados é complexo e pode envolver mecanismos de danos interlaminares. A delaminação é a descontinuidade interlaminar que pode se propagar de forma catastrófica com a aplicação de cargas mecânicas. O ensaio de corpos de prova denominado de Double Cantilever Beam (DCB é o método mais utilizado para determinar a tenacidade à fratura em Modo I de compósitos estruturais. Neste trabalho, amostras preparadas de um laminado de tecido bidirecional, estilo plain weave, foram submetidas ao carregamento estático de delaminação em Modo I, à temperatura ambiente. A análise fractográfica das superfícies delaminadas foi realizada por microscopia eletrônica de varredura. Os resultados mostram que o processo de fratura se inicia nas bolsas de resina após um inserto de Teflon® e se propaga ao longo das regiões ricas em resina posicionadas nos interstícios de entrelaçamento das mechas da trama e da urdidura. Os principais aspectos fractográficos revelados são identificados, documentados e discutidos neste trabalho.Many components of modern aircrafts are now manufactured from polymer composites. Reinforced laminates with continuous carbon fibers and modified epoxy resin are employed in primary and secondary structures to reduce weight and improve the aircraft performance. However, if a circumstantial failure happens, the complex fracture process of the laminates may involve interlaminar damage mechanisms. The delamination is the interlaminar discontinuity which may propagate catastrophically with the application of mechanical loads. The Double Cantilever Beam (DCB is the most

  16. Infecção pós-estabilização intramedular das fraturas diafisárias dos membros inferiores: protocolo de tratamento Post-stabilization infection of lower limbs' shaft fractures: a treatment protocol

    Alecsander Guillaumon Pereira da Silva

    2008-01-01

    Full Text Available O tratamento das infecções pós-estabilização intramedular das fraturas dos membros inferiores apresenta uma grande variedade de opções, desde a limpeza cirúrgica com manutenção da haste até a retirada da haste e colocação de fixador externo. O espaçador diafisário ainda é uma técnica pouco utilizada para o tratamento desse tipo de infecção, existindo poucos relatos na literatura sobre sua aplicação. No IOT HCFMUSP, esta técnica vem sendo empregada de maneira crescente e, no presente trabalho, temos o objetivo de descrever o protocolo de tratamento utilizado em nossa instituição, bem como a apresentação de nossa casuística inicial. O protocolo consiste na antibioticoterapia endovenosa, retirada da haste intra-medular, desbridamento cirúrgico do canal medular e colocação do espaçador diafisário. Revisamos retrospectivamente o prontuário de 11 pacientes com 13 fraturas, sendo cinco femorais e oito tibiais, submetidos à técnica apresentada. O tempo de seguimento variou de 6 a 36 meses, média de 14,27 meses, com resultados satisfatórios ocorridos em dez das treze fraturas estudadas, representando uma taxa de eficácia de 76,93%. Concluímos que o método representa uma boa alternativa para o tratamento destes casos, necessitando ainda novos trabalhos comparativos para a avaliação de suas vantagens e para difundir o uso do método.Treatment of infection following intramedullary nailing of lower limbs present a large variety of options, that goes from debridement and maintenance of the nail up to the its removal and external fixation of the limb. The cement rod is an unusual technique employed for treating this kind of infection, although little is found in literature about its application. At the IOT HC-FMUSP, this technique has been increasingly employed and the purpose of this article is to describe the treatment protocol used in our institution. The protocol consists in intravenous antibiotic therapy, removal

  17. Treatment of unstable sacral fractures with percutaneous reconstruction plate internal fixation Tratamento de fraturas sacrais instáveis com reconstrução percutânea com fixação de placa interna

    Hong-Wei Chen

    2012-05-01

    Full Text Available PURPOSE: To study the effects of percutaneous reconstruction plate internal fixation in the treatment of unstable sacral fractures. METHODS: Percutaneous reconstruction plate internal fixation was applied on 21 cases of unstable sacral fracture (15 males and six females, at age range of 16-65 years, mean 38.3 years including four cases of Denis Zone I, 14 cases of Zone II and three cases of Zone III. In operation, an arc incision (about 3-5 cm long was made along the iliac crest on the outside border of posterior superior iliac spine (PSIS on both sides, and then the plate was transported from the wounded side to the opposite one through the subcutaneous tunnel. RESULTS: The mean incision length, operation time, intraoperative blood loss was 4.3cm, 45.2min, and 160.8ml respectively. All these patients were followed up for 12-33 months (average 16.3 months, which showed no incision infection, intraoperative neurovascular injury, internal fixation loose or breakage, disunion, or obvious lower limb length inequality. The function result was rated as excellent in six cases, good in 12 and fair in 3, with excellence rate of 85.7%, according to the Majeed scoring system. CONCLUSION: Percutaneous reconstruction plate internal fixation is an ideal surgical approach to unstable sacral fractures, as it is easy, safe, causing less trauma and fewer complications, and conducive to quicker recovery.OBJETIVO: Estudar os efeitos da reconstrução percutânea com fixação de placa interna no tratamento de fraturas sacrais instáveis. MÉTODOS: A reconstrução percutânea com fixação de placa interna foi aplicada em 21 casos de fratura sacral instável (15 homens e seis mulheres, com idade variando entre 16 e 65 anos, média de 38,3 anos incluindo quatro casos de Zona I de Denis, 14 casos de Zona II e três casos de Zona III. No ato operatório, uma incisão arqueada (cerca de 3 a 5cm de comprimento foi feita ao longo da crista ilíaca na borda externa da

  18. Haste intramedular polimérica bioreabsorvível (PLLA/PHBV para uso na recuperação de fraturas ósseas Intramedullary bioresorbable polymeric pin (PLLA/PHBV for use in bone fracture recuperation

    Betina M. P. Ferreira

    2008-01-01

    Full Text Available A crescente utilização de materiais poliméricos bioreabsorvíveis em medicina, tem estimulado pesquisadores na área ortopédica na busca de soluções mais biológicas, substituindo artefatos tais como fios, hastes e placas metálicas por polímeros bioreabsorvíveis no tratamento de fraturas. Para tanto, resolveu-se estudar implantes da blenda de PLLA/PHBV (dois polímeros bioreabsorvíveis moldados em uma mini-injetora. Esses implantes foram utilizados para recuperação de fraturas de fêmur de coelhos e avaliados em comparação ao fio de Steinmann (aço inox, usado comercialmente. Após eutanásia com 6, 12 e 24 semanas de implantação dos artefatos, os ossos foram estudados com radiografias, exame histológico e ensaio mecânico, enquanto os implantes poliméricos foram submetidos a microscopia eletrônica de varredura (SEM, ensaio mecânico e calorimetria diferencial de varredura modular (MDSC. As radiografias mostraram calos ósseos bem formados, tanto com o uso da haste de polímero como com o controle metálico. O estudo histológico mostrou ausência de reações inflamatórias ou osteólise. O ensaio mecânico mostrou que a consolidação óssea ocorreu nos dois grupos. Tanto no ensaio mecânico como na calorimetria observou-se que a haste polimérica apresentou sinais de degradação progressiva no tempo estudado. Com os dados obtidos neste estudo, podemos afirmar que o implante PLLA/PHBV demonstrou ser efetivo na reparação de fraturas do fêmur de coelhos quando comparado com o controle metálico.The growing interest in medicine with the use of bioreabsorbable polymeric materials has been stimulating researchers from orthopedic area to develop more biological solutions, substituting threads, stems and metallic plates for bioreabsorbable polymers in the treatment of fractures. So, we decided to study implants of the PLLA/PHBV blends (two bioreabsorbable polymers moulded in a mini-injector. Those implants were used for

  19. Delirium in elderly individuals with hip fracture: causes, incidence, prevalence, and risk factors Delirium em idosos com fratura de fêmur: causas, incidência, prevalência e fatores de risco

    Maria Elizabet Furlaneto

    2006-02-01

    Full Text Available OBJECTIVES: To determine the incidence, prevalence, risk factors, and causes of delirium in elderly individuals with hip fractures, as well as the impact of delrium on mortality and length of hospital stay. PATIENTS: One hundred and three patients aged 65 and older with hip fractures were included consecutively between January 2001 and June 2002. METHOD: Delirium was diagnosed using the Confusion Assessment Method, applied within the first 24 hours after admission, and then daily. All patients underwent a global geriatric evaluation including clinical history, physical examination, laboratory tests, surgical risk evaluation, and functional and mental evaluations. Patients with delirium (cases were compared with patients without delirium (controls. RESULTS: Thirty (29.1% patients in this sample met the criteria for delirium, with a prevalence of 16.5% (17/103 and an incidence of 12.6% (13/103. Cognitive and functional deficits had a significant association with delirium, although only cognitive deficit was revealed to be an independent risk factor after analysis with the logistic regression model. The most frequent causes of delirium were drugs and infections. The hospital stay was significantly longer for patients with delirium compared with patients in the control group (26.27 versus 14.38 days, respectively. Mortality showed a tendency to higher levels in patients with delirium during their hospital stay, although with no statistical significance. CONCLUSIONS: Delirium is a frequent complication among hospitalized elderly individuals with hip fractures. It is associated with cognitive and functional deficits, and it is associated with increases the length of hospital stay and mortality.OBJETIVOS: Deteminar a incidência, prevalência, fatores de risco e causas de delirium em idosos com fratura de fêmur, e seu impacto sobre mortalidade e permanência hospitalar. MÉTODOS: Cento e três pacientes com 65 anos e mais com fratura de fêmur foram

  20. Risk factors for osteoporotic fractures and low bone density in pre and postmenopausal women Factores de riesgo para fractura por osteoporosis y baja densidad ósea en mujeres en la pre y post menopausia Fatores de risco para fratura por osteoporose e baixa densidade óssea em mulheres na pré e pós-menopausa

    Marcelo M Pinheiro

    2010-06-01

    Full Text Available OBJECTIVE: To estimate the prevalence and analyze risk factors associated to osteoporosis and low-trauma fracture in women. METHODS: Cross-sectional study including a total of 4,332 women older than 40 attending primary care services in the Greater São Paulo, Southeastern Brazil, between 2004 and 2007. Anthropometrical and gynecological data and information about lifestyle habits, previous fracture, medical history, food intake and physical activity were obtained through individual quantitative interviews. Low-trauma fracture was defined as that resulting from a fall from standing height or less in individuals 50 years or older. Multiple logistic regression models were designed having osteoporotic fracture and bone mineral density (BMD as the dependent variables and all other parameters as the independent ones. The significance level was set at pOBJETIVO: Estimar la prevalencia y analizar los factores de riesgo asociados con osteoporosis y fractura por bajo impacto entre mujeres. MÉTODOS: Estudio transversal realizado con 4.332 mujeres encima de 40 años de edad provenientes de atención primaria de salud en el área metropolitana de la gran Sao Paulo, SP, entre 2004 2007. Datos antropométricos y ginecológico y relativos a hábitos de vida, fractura previa, antecedentes personales, ingestión alimentaria y actividad física fueron evaluados por medio de entrevista individual y cuantitativa. Fractura por bajo impacto fue definida como decurrente de caída de la propia altura o menos en individuos con más de 50 años de edad. Modelos de regresión multivariada y logística analizaron, respectivamente, la densidad ósea y la fractura por osteoporosis, como variables dependientes y todas las otras como independientes. El nivel de significancia estadística establecido fue pOBJETIVO: Estimar a prevalência e analisar os fatores de risco associados com osteoporose e fratura por baixo impacto entre mulheres. MÉTODOS: Estudo transversal realizado

  1. Enraizamento de estacas de atemoieira ‘Gefner’ tratadas com auxinas Rooting of atemoya ‘Gefner’ cuttings treated with auxins

    Gisela Ferreira

    2008-12-01

    Full Text Available A propagação da atemóia deve ser feita assexuadamente e, nesse contexto, a estaquia surge como alternativa. Dessa forma, objetivou-se determinar a parte do ramo de atemoieira (Annona cherimola Mill. x Annona squamosa L. cv. 'Gefner' mais apropriada para estaquia. O delineamento experimental foi o inteiramente casualizado, em esquema fatorial 3x3 (reguladores x tipos de estaca, com 5 repetições de 12 estacas. Os reguladores utilizados foram AIB 0,5% e ANA 0,5%, aplicados na forma de talco na base das estacas, além da testemunha. Os diferentes tipos de estacas foram retirados de 3 regiões do caule (apical, mediana e basal. As estacas tratadas foram colocadas para enraizar em bandejas de poliestireno contendo substrato comercial Plantmax® e levadas para câmara de nebulização intermitente, onde permaneceram durante 136 dias. As variáveis avaliadas foram: porcentagem de estacas vivas, porcentagem de estacas vivas com enraizamento, porcentagem de estacas enraizadas com folhas remanescentes, com brotações e com folhas remanescentes + brotações, porcentagem de estacas enraizadas sem folhas, número, comprimento médio e massa da matéria seca de raízes por estaca enraizada, área foliar e massa da matéria seca de folhas remanescentes e brotações. A atemoieira apresenta maior potencial para formação de mudas por estaquia empregando-se estacas apicais sem tratamento e medianas tratadas com ANA (0,5%.Atemoya propagation must be done asexually; in this context, cutting represents an alternative. This work aimed to verify the most appropriate branch part of atemoya (Annona cherimola Mill. x Annona squamosa L. cv. 'Gefner' for cutting. The experimental design was completely randomized, in a 3x3 factorial arrangement (plant growth regulators x cutting types, with 5 replicates of 12 cuttings. The plant growth regulators IBA 0.5% and NAA 0.5% were applied as talc in the base of cuttings, besides the control. The different cutting types were

  2. A new method for classifying distal radius fracture: the IDEAL classification Um novo método de classificação para as fraturas da extremidade distal do rádio – a classificação IDEAL

    João Carlos Belloti

    2013-01-01

    Full Text Available OBJECTIVES: To describe the new IDEAL method from classifying distal radius fractures. METHODS: IDEAL classification system is based on the most important literature evidences about clinical and radiographic characteristics that influence in the treatment and prognosis for patients that suffered from a distal radius fractures. In this method, we classify the fracture in patients first consultation, in which we collect demographical (age and trauma energy and radiographic characteristics ( fracture deviation, articular fracture, and associated lesions. For each feature a score is attributed for grouping purposes. Group I - Stable fractures, good prognosis; Group II - potentially unstable fractures, commonly treated by surgical methods. Prognosis depends on surgeons' success after method choice. Group III - complex and instable fractures, poor outcome is expected. CONCLUSION: IDEAL classification staging rationale was presented, which is based on the best available evidence. The evidence of its scientific plausibility will be settled with the assessment of the classification reliability and its capacity to aid in therapeutical decisions and as a tool to predict prognosis. Further studies are under development to support these properties. OBJETIVOS: Descrição do método de Classificação IDEAL - para as fraturas da extremidade distal do rádio. MÉTODOS: O sistema de classificação IDEAL fundamenta-se nas principais evidências da literatura sobre fatores clínicos e radiográficos que influenciam o tratamento e prognóstico das fraturas do rádio distal. Classificamos as fraturas no atendimento inicial do paciente mediante a verificação de dois dados epidemiológicos e três dados radiográficos: Idade do paciente, energia do trauma, desvio dos fragmentos, incongruência articular e lesões associadas. RESULTADOS: Conforme a pontuação obtida, agrupamos os casos em três grupos: Grupo I - fraturas estáveis com bom prognóstico, Grupo II

  3. Qualidade de uva 'Isabel' tratada com cloreto de cálcio em pós-colheita e armazenada sob atmosfera modificada

    Rosana Sousa da Silva

    2012-03-01

    Full Text Available Uvas 'Isabel' foram tratadas após a colheita com cloreto de cálcio (CaCl2 e submetidas a atmosfera modificada para avaliação da manutenção de sua qualidade durante o armazenamento, a 12±1 ºC e 85±2% de UR. O experimento foi conduzido em delineamento inteiramente casualizado, em esquema fatorial 5 x 2 x 5, com 3 repetições, sendo cinco doses de CaCl2 (0,0; 0,5; 1,0; 2,0 e 4,0%, dois tipos de atmosfera [ambiente e modificada (AM] e cinco períodos, durante o armazenamento refrigerado. As avaliações foram acidez titulável (AT, sólidos solúveis (SS, relação SS/AT, pH, ácido ascórbico, incidência de podridão, perda de massa, aparência do engaço e índice de degrana. A AM reduziu a perda de massa, a incidência de podridão e manteve a aparência verde do engaço, ampliando a vida útil de uva 'Isabel' em seis dias. Doses de CaCl2 entre 0,5 e 2,0% reduziram a incidência de podridão. A aplicação de CaCl2 associado à AM reduziu a degrana em uva 'Isabel' durante o armazenamento refrigerado.

  4. Qualidade das águas cinza tratada com fitorremediação em unidades de produção agrícola

    Verena S. Baracuhy

    2015-07-01

    Full Text Available A irrigação é uma atividade que necessita de grande quantidade de água, o tratamento de águas cinzas provenientes de uma lavanderia pública em regiões semiáridas para reuso passa a ser uma alternativa de sobrevivência neste ambiente e favorável no desenvolvimento econômico sustentável. Nesse contexto, a pesquisa foi realizada no distrito de Ribeira no município de Cabaceiras - PB objetivando-se avaliar a qualidade da água cinza tratada com fitorremediação nas unidades de produção agrícola. Foram realizados dois tratamentos com(Tanque 2 e sem fitorremediação(Tanque 1, a cultura utilizada foi o capim elefante roxo. Foram coletadas amostras mensais e analisadas os seguintes parâmetros fisicoquimicos: Turbidez, pH, Condutividade elétrica (Ce, Demanda Quimica de Oxigenio(DQO e Fostoro Total. Para a turbidez os valores dos tratamentos foram acima de 1.000 UNT. Na demanda química de oxigênio, o valor mínimo foi de 311mg/L (setembro e máximo de 438mg/L (outubro no tanque 2 em contrapartida no tanque 1 o valor mínimo foi de 354mg/L (setembro e máximo de 618mg/L (outubro. O tratamento com fitorremediação teve uma maior eficiência na redução de DQO.Palavras – chave: capim elefante roxo, reuso, irrigação

  5. Additive Manufacturing for Surgical Planning of Mandibular Fracture

    Nadja Maria da Silva Oliveira Brito

    2016-01-01

    Full Text Available Currently, imaging techniques such as Computed Tomography with three-dimensional reconstruction (3D and Magnetic Resonances are being routinely used in pre-surgical planning in all fields of medicine. Nowadays, virtual three-dimensional images, commonly displayed on two-dimensional surfaces, such as the computer screen, can be used to produce rapidly prototyped models, with excellent dimensional accuracy and fine reproduction of anatomical structures, providing professionals with the ability to use the biomodel in planning and simulating medical and dental procedures (oral and maxillofacial surgery, making individualized facial implants and prostheses, measurements and previous adaptations of prefabricated fixation plates, thus contributing to considerable reductions in surgical time and consequently the duration of anesthesia, minimizing infection risks and reducing hospital costs. In this report, we describe a case of surgical planning and treatment of bilateral atrophic mandibular fracture, in which, for surgical planning, authors used Rapid Prototyping as an adjunct tool, considering the advantages already outlined.

  6. Bilaterally impacted mandibular supernumerary premolars associated with unusual clinical complications

    Zameer Pasha

    2013-01-01

    Full Text Available Supernumerary teeth are extra teeth in comparison to the normal dentition. Their prevalence varies between 0.1% and 3.8%. Supernumeraries are more common in permanent dentition and its incidence is higher in maxillary incisor region, followed by maxillary third molar and mandibular molar, premolar, canine, and lateral incisor. The prevalence of supernumerary premolars is between 0.075-0.26%, and they may occur in single or multiple numbers Bilateral occurrence is uncommon and large percentage of supernumerary premolars remains impacted, unerupted, and usually asymptomatic; radiograph plays an important role in diagnosis of these. The present paper reports a case of bilaterally impacted completely developed supernumerary premolars associated with common clinical complication in unusual manner along with taurodontism of the upper and lower molars.

  7. MANDIBULAR ASYMMETRY CHARACTERIZATION USING GENERALIZED TENSOR-BASED MORPHOMETRY.

    Paniagua, Beatriz; Alhadidi, Abeer; Cevidanes, Lucia; Styner, Martin; Oguz, Ipek

    2011-12-31

    Quantitative assessment of facial asymmetry is crucial for successful planning of corrective surgery. We propose a tensor-based morphometry (TBM) framework to locate and quantify asymmetry using 3D CBCT images. To this end, we compute a rigid transformation between the mandible segmentation and its mirror image, which yields global rotation and translation with respect to the cranial base to guide the surgery's first stage. Next, we nonrigidly register the rigidly aligned images and use TBM methods to locally analyze the deformation field. This yields data on the location, amount and direction of "growth" (or "shrinkage") between the left and right sides. We visualize this data in a volumetric manner and via scalar and vector maps on the mandibular surface to provide the surgeon with optimal understanding of the patient's anatomy. We illustrate the feasibility and strength of our technique on 3 representative patients with a wide range of facial asymmetries.

  8. Three-dimensional computerized tomography in mandibular condyle fractures

    Bermeo, Fausto; Salazar, Abad

    2003-01-01

    Now, car accidents are so commons, this associated to the high technology in produce automobiles make this type of accidents so serious and the consequences of mandibular condyle fractures are more commons and with more gravity, some of these patients, generally need a traqueostomy to be operated, that is why every second that we can save during the surgery is important. The normal exams as X rays and simple TAC give as an important idea but no complete, on the contrary the three-dimensional TAC permits to observe every damages and its exact location, this contribute to make a better surgery organization, the number and type of plates that we have to put and the better way to treat each case, that contribute to reduce time in operating theatre which is in benefit of the patient, diminishing risks in serious patients as they are, that is why we recommend the utilization of the three-dimensional TAC. (The author)

  9. Management of temporo-mandibular joint ankylosis in growing children.

    Shashikiran, N D; Reddy, S V V; Patil, R; Yavagal, C

    2005-03-01

    Although temporo-mandibular joint (TMJ) ankylosis is one of the most common pathologies afflicting the facial skeleton, it is also the most overlooked and under-managed problem in children. The TMJ forms the very cornerstone of cranio-facial integrity and hence its ankylosis in growing children adversely affects the growth and development of the jaws and occlusion. Impairment of speech, difficulty in mastication, poor oral hygiene, rampant caries and acute compromise of the airway pose a severe psychologic burden on the tender minds of children. The aim of this article is to present an overview of efficient management strategies, based on a case report, so as to increase its awareness among all dental surgeons involved in the treatment of children.

  10. Mandibular condylar morphology for bruxers with different grinding patterns.

    Tao, Jianxiang; Wu, Junhua; Zhang, Xuying

    2016-07-01

    The purpose of this study was to investigate the mandibular condylar morphology for bruxers with different grinding patterns. Condylar sectional morphology and condylar position of 30 subjects were determined by two viewers using cone beam computed tomography (CBCT) image data sets. The grinding patterns during sleep bruxism (SB) were determined objectively using a Brux-checker device.Chi-square tests were used for statistical analysis for the condylar morphology type between different tooth grinding patterns. Spearman's rank correlation coefficient was used for correlation analysis between condylar position and the canine guidance area during SB. Theincidence of condylarmorphologicaldivergence from idealwas35%.There isa significant difference in distribution of condylar morphology type between the group grinding (GG) and GG combined with mediotrusive side grinding (MG) (p < 0.05). There was no significant correlation between condylar position and canine guidance area during bruxism. MG during SB is associated with condylar morphology that is considered not to be ideal.

  11. Management of temporo-mandibular joint ankylosis in growing children

    Shashikiran N

    2005-03-01

    Full Text Available Although temporo-mandibular joint (TMJ ankylosis is one of the most common pathologies afflicting the facial skeleton, it is also the most overlooked and under-managed problem in children. The TMJ forms the very cornerstone of cranio-facial integrity and hence its ankylosis in growing children adversely affects the growth and development of the jaws and occlusion. Impairment of speech, difficulty in mastication, poor oral hygiene, rampant caries and acute compromise of the airway pose a severe psychologic burden on the tender minds of children. The aim of this article is to present an overview of efficient management strategies, based on a case report, so as to increase its awareness among all dental surgeons involved in the treatment of children.

  12. Non Syndromic Hypoglossia With Mandibular and Palatal Abnormalities

    Shishir Ram Shetty

    2011-03-01

    Full Text Available Tongue is the most mobile organ of the body with multiple functions such as speech, mastication, taste and swallowing. Numerous congenital and developmental disorders of the tongue have been reported in literature. Hypoglossia also known as microglossia is one of the rare anomalies. Usually hypoglossia is associated with many other systemic abnormalities but rarely found as an isolated entity. Lack of tongue development leads to decreased mandibular growth. The aim of this article is to report a rare case of isolated hypoglossia and resultant micrognathia. Presence of palatal and faucial pillar abnormalities with hypoglossia which is extremely rare is also highlighted in our report. [J Contemp Med 2011; 1(1.000: 25-28

  13. Arched needle technique for inferior alveolar mandibular nerve block.

    Chakranarayan, Ashish; Mukherjee, B

    2013-03-01

    One of the most commonly used local anesthetic techniques in dentistry is the Fischer's technique for the inferior alveolar nerve block. Incidentally this technique also suffers the maximum failure rate of approximately 35-45%. We studied a method of inferior alveolar nerve block by injecting a local anesthetic solution into the pterygomandibular space by arching and changing the approach angle of the conventional technique and estimated its efficacy. The needle after the initial insertion is arched and inserted in a manner that it approaches the medial surface of the ramus at an angle almost perpendicular to it. The technique was applied to 100 patients for mandibular molar extraction and the anesthetic effects were assessed. A success rate of 98% was obtained.

  14. Prediction of postoperative pain after mandibular third molar surgery

    Rudin, Asa; Eriksson, Lars; Liedholm, Rolf

    2010-01-01

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

  15. COMPORTAMENTO EM COMPRESSÃO DE ARGAMASSAS REFORÇADAS COM FIBRAS NATURAIS. I RELAÇÃO TENSÃO-DEFORMAÇÃO EXPERIMENTAL E PROCESSO DE FRATURA

    Romildo Dias Toledo Filho

    Full Text Available RESUMO Esta é a primeira parte de um artigo dividido em duas partes e visa avaliar, analítica e experimentalmente, o comportamento em compressão de argamassas reforçadas com fibras naturais. No presente artigo pretende-se mostrar, de forma experimental, como a adição de fibras de sisal e coco afeta, em várias frações volumétricas e comprimentos, o comportamento tensão-deformação, em compressão, de duas matrizes de argamassa. A influência dessas fibras no processo de fratura das argamassas é também avaliada. O efeito da substituição parcial do cimento Portland (OPC por micro- sílica e escória de alto forno no comportamento dos compósitos é também discutido. Os resultados indicam que a adição de fibras naturais reduziu a resistência a compressão das matrizes em cerca de 18% a 32% e, de forma desprezível o seu módulo de elasticidade mas, não modificou, de forma significativa, o coeficiente de Poisson. Por outro lado, as fibras confinaram o material retardando a propagação da primeira fissura e aumentando a tenacidade pós-carga de pico do material. Com relação ao processo de fratura da argamassa, os resultados indicam que, até a tensão de ruptura, o efeito da adição de fibras de sisal e coco é similar às características produzidas pelo acréscimo da quantidade de areia na matriz de argamassa. A substituição parcial de OPC por escória e micro-sílica conduziu a misturas com uma resistência a compressão ligeiramente mais alta que a das preparadas apenas com OPC. A substituição do OPC resultou tanto na redução quanto no aumento do módulo de elasticidade, enquanto o coeficiente de Poisson não foi modificado significativamente.

  16. Is the panoramic mandibular index useful for bone quality evaluation?

    Kwon, Ah Young; Huh, Kyung Hoe; Yi, Won Jin; Lee, Sam Sun; Choi, Soon Chul; Heo, Min Suk [Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul (United States)

    2017-06-15

    The aim of this study was to determine whether the panoramic mandibular index (PMI) is useful for assessing bone mineral density. We also analyzed the potential correlations between PMI parameters and patient age. Four observers measured the PMI of both sides of the mental foramen using a picture archiving and communication system and images in the Digital Imaging and Communications in Medicine format. They studied 300 panoramic radiographic images of patients belonging to the following age groups: 40–49 years, 50–59 years, 60–69 years, 70–79 years, and 80–89 years. The observers were allowed to zoom in or out and to adjust the contrast of the images. Further, they were instructed to record the reasons for any measurements that could not be made. Then, we conducted a reliability analysis of the measured PMI and assessed the correlations between different patient age groups and the 3 parameters used for determining the PMI from the available data. Among the 600 data items collected, 23 items were considered unmeasurable by at least 1 observer for the following 4 reasons: postoperative state, lesion, unidentified mental foramen, and alveolar bone loss. The intraobserver reproducibility of the measurable data was 0.611-0.752. The mandibular cortical width (MCW) decreased significantly as patient age increased. PMI had limited usability when the margin of the mental foramen was not clear. In contrast, MCW, a parameter used for determining the PMI, had fewer drawbacks than the PMI with respect to bone mineral density measurements and exhibited a significant correlation with patient age.

  17. Is the panoramic mandibular index useful for bone quality evaluation?

    Kwon, Ah Young; Huh, Kyung Hoe; Yi, Won Jin; Lee, Sam Sun; Choi, Soon Chul; Heo, Min Suk

    2017-01-01

    The aim of this study was to determine whether the panoramic mandibular index (PMI) is useful for assessing bone mineral density. We also analyzed the potential correlations between PMI parameters and patient age. Four observers measured the PMI of both sides of the mental foramen using a picture archiving and communication system and images in the Digital Imaging and Communications in Medicine format. They studied 300 panoramic radiographic images of patients belonging to the following age groups: 40–49 years, 50–59 years, 60–69 years, 70–79 years, and 80–89 years. The observers were allowed to zoom in or out and to adjust the contrast of the images. Further, they were instructed to record the reasons for any measurements that could not be made. Then, we conducted a reliability analysis of the measured PMI and assessed the correlations between different patient age groups and the 3 parameters used for determining the PMI from the available data. Among the 600 data items collected, 23 items were considered unmeasurable by at least 1 observer for the following 4 reasons: postoperative state, lesion, unidentified mental foramen, and alveolar bone loss. The intraobserver reproducibility of the measurable data was 0.611-0.752. The mandibular cortical width (MCW) decreased significantly as patient age increased. PMI had limited usability when the margin of the mental foramen was not clear. In contrast, MCW, a parameter used for determining the PMI, had fewer drawbacks than the PMI with respect to bone mineral density measurements and exhibited a significant correlation with patient age

  18. MultiModality Surgical and Hyperbaric Management of Mandibular Osteoradionecrosis

    Freiberger, John J.; Yoo, David S.; Lisle Dear, Guy de; McGraw, Thomas A.; Blakey, George H.; Padilla Burgos, Rebecca; Kraft, Kevin; Nelson, John W.; Moon, Richard E.; Piantadosi, Claude A.

    2009-01-01

    Purpose: To elucidate long-term outcomes in 65 consecutive patients meeting a uniform definition of mandibular osteoradionecrosis (ORN) treated with multimodality therapy including hyperbaric oxygen (HBO). Methods and Materials: Pretreatment, post-treatment and long-term follow-up of mandibular lesions with exposed bone were ranked by a systematic review of medical records and patient telephone calls. The ranking system was based on lesion diameter and number plus disease progression. Changes from pretreatment to post-treatment and follow-up were analyzed by Wilcoxon signed-rank tests. Improved wound survival, measured by time to relapse, defined as any less favorable rank after HBO treatment, was assessed by Kaplan-Meier analysis. Results: In all, 57 cases (88%) resolved or improved by lesion grade or progression and evolution criteria after HBO (p < 0.001). Four patients healed before surgery after HBO alone. Of 57 patients who experienced improvement, 41 had failed previous nonmultimodality therapy for 3 months and 26 for 6 months or more. A total of 43 patients were eligible for time-to-relapse survival analysis. Healing or improvement lasted a mean duration of 86.1 months (95% confidence interval [95% CI], 64.0-108.2) in nonsmokers (n = 20) vs. 15.8 months (95% CI, 8.4-23.2) in smokers (n = 14) versus 24.2 months (95% CI, 15.2-33.2) in patients with recurrent cancer (n = 9) (p = 0.002 by the log-rank method). Conclusions: Multimodality therapy using HBO is effective for ORN when less intensive therapies have failed. Although the healing rate in similarly affected patients not treated with HBO is unknown, the improvements seen with peri-operative HBO were durable provided that the patients remained cancer free and abstained from smoking.

  19. Radiologic assessment of maxillofacial, mandibular, and skull base trauma

    Schuknecht, Bernhard; Graetz, Klaus

    2005-01-01

    Cranio-maxillofacial injuries affect a significant proportion of trauma patients either in isolation or concurring with other serious injuries. Contrary to maxillofacial injuries that result from a direct impact, central skull base and lateral skull base (petrous bone) fractures usually are caused by a lateral or sagittal directed force to the skull and therefore are indirect fractures. The traditional strong role of conventional images in patients with isolated trauma to the viscerocranium is decreasing. Spiral multislice CT is progressively replacing the panoramic radiograph, Waters view, and axial films for maxillofacial trauma, and is increasingly being performed in addition to conventional films to detail and classify trauma to the mandible as well. Imaging thus contributes to accurately categorizing mandibular fractures based on location, into alveolar, mandibular proper, and condylar fractures - the last are subdivided into intracapsular and extracapsular fractures. In the midface, CT facilitates attribution of trauma to the categories central, lateral, or combined centrolateral fractures. The last frequently encompass orbital trauma as well. CT is the imaging technique of choice to display the multiplicity of fragments, the degree of dislocation and rotation, or skull base involvement. Transsphenoid skull base fractures are classified into transverse and oblique types; lateral base (temporal bone) trauma is subdivided into longitudinal and transverse fractures. Supplementary MR examinations are required when a cranial nerve palsy occurs in order to recognize neural compression. Early and late complications of trauma related to the orbit, anterior cranial fossa, or lateral skull base due to infection, brain concussion, or herniation require CT to visualize the osseous prerequisites of complications, and MR to define the adjacent brain and soft tissue involvement. (orig.)

  20. The cerebro-costo-mandibular syndrome: third report of familial occurrence

    Hennekam, R. C.; Beemer, F. A.; Huijbers, W. A.; Hustinx, P. A.; van Sprang, F. J.

    1985-01-01

    Two male sibs with cerebro-costo-mandibular syndrome and spina bifida are described. The parents are physically and radiologically normal. A short review of the pertinent literature is given with special emphasis on the mode of inheritance