modelo experimental de reconstrução em falha mandibular em coelhos experimental model of reconstruction in mandibular defect in rabbit

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ID: 156445
2010
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Abstract
Este trabalho tem como objetivo apresentar um novo modelo experimental de reconstrução em falha mandibular em coelhos. Foram utilizados 14 animais, nos quais, em uma primeira etapa, extraiu-se cirurgicamente o dente incisivo inferior esquerdo permanente. Após um período de 50 dias para o preenchimento ósseo do alvéolo dentário, foi realizada a cirurgia. Inicialmente, coletou-se 10x5x5mm de enxerto ósseo autógeno da crista ilíaca e, em seguida, foi procedida uma falha mandibular parcial de mesmo tamanho, que foi preenchida com o enxerto e fixada com microplaca de titânio. Os coelhos foram submetidos a avaliações clínicas e radiográficas, sendo sete submetidos a eutanásia aos 15 dias e os demais aos 30 dias para análise macro e microscópica. A ingestão de água e ração não foi comprometida, e os animais não apresentaram algia, dificuldade de mastigação e de apreensão. Somente um animal apresentou rejeição a um parafuso, sem ocorrer o deslocamento da placa nem do enxerto. Esse método mostrou-se eficaz como modelo experimental de reconstrução em falha mandibular de coelhos, demonstrando a evolução cicatricial óssea do enxerto por meio dos exames radiográficos, macroscópicos e microscópicos aos 15 e 30 dias.
This paper aims to present a new experimental model of mandibular defect reconstruction in rabbits. It was used 14 animals, in which, in a first stage the left permanent inferior incisive tooth was extracted surgically. After a 50 days period for the bone to fulfill the dentary alveolus, surgery was performed. At first, a 10x5x5mm autograft was removed form the iliac crest, following a partial mandibular failure in the bone with the same auto graft size which was filled with the graft and fixed using titanium microplate. The rabbits were submitted to clinical and radiographic evaluation and 7 of them were euthanasiated at 15 days and the other 7 at 30 days to macro and microscopic analysis. The water and commercial food ingestion was not compromised, and the animals did not showed any chewing or apprehension difficulties, neither pain. Only one animal presented rejection to one screw, without occurring micro plate nor auto graft dislocation. This method showed to be efficient for an experimental model of reconstruction in mandibular defects of rabbits, demonstrating a healing evolution of the graft through radiographic, macroscopic and microscopic exams in 15th and 30th days.
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Authors ;Cristiano Gomes;Mariane Brascher Elizeire;Paula Becker;Lisiane Foerstnow;Gisele Stein;Marcelo Meller Alievi;Elizabeth Obino Cirne-Lima;Emerson Antonio Contesini
Journal Trials
Year 2010
DOI
DOI not found
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000700018
Keywords
surgery graft

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