Análise da distribuição das tensões em maxila submetida à expansão cirurgicamente assistida com aparelho ósseo-suportado

Autores

DOI:

https://doi.org/10.33448/rsd-v11i2.25845

Palavras-chave:

Técnica de Expansão Palatina; Análise de Elementos Finitos; Análise do estresse dentário.

Resumo

O objetivo desta pesquisa foi avaliar, por meio do Método de Elementos Finitos (MEF), a distribuição das tensões produzidas pela Expansão de Maxila Cirurgicamente Assistida (EMCA) nas estruturas maxilares utilizando-se aparelho expansor ósseo-suportado. Material e métodos: Foi confeccionado um modelo tridimensional de maxila para simulação da EMCA com osteotomia tipo LeFort I descendente sem degrau, com disjunção pterigomaxilar utilizando um modelo de aparelho ósseo-suportado para o teste com a simulação de abertura de 1mm. Os resultados mostraram maior abertura da maxila na região anterior de incisivos a pré-molar (1 mm) e em menor quantidade (0,6mm) na região de molares. A tensão máxima principal (TMXP) mostrou a concentração de tensões principalmente em toda face palatina da maxila de pré-molar ao túber maxilar. Pela face lateral, ficou mais evidente a TMXP nas regiões de osso alveolar posterior ao pré-molar, molares e túber, assim como na região de pilar zigomático acima da osteotomia. Pelo plano transversal foi possível observar a transmissão de tensões ao longo das estruturas ósseas mostrando pouca dissipação para as raízes do molar. Enquanto que as forças de compressão (Tensão Mínima Principal), evidenciadas pela tensão mínima principal, se manifestaram nas áreas de pilar zigomático e adjacentes as osteotomias, assim como nas áreas de contato do apoio do aparelho com o osso palatino. Tensões de tração e compressão também foram evidenciadas na região de processo pterigoide. A análise de tensão de Von Mises mostrou que a parte que mais sofreu estresse é a haste que liga o módulo do aparelho com a plataforma de apoio. Conclusão: Houve maior abertura da maxila na região anterior e as tensões resultantes de forças transmitidas ao osso alveolar dos dentes adjacentes ao aparelho, parecem não ser suficientes para deslocar os dentes.

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Publicado

03/02/2022

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TIEGHI NETO, V.; BARBOSA, C. G. .; SANCHES, I. M. .; NORITOMI, P. Y. .; SILVA, J. V. L. da .; GONÇALES, E. S. . Análise da distribuição das tensões em maxila submetida à expansão cirurgicamente assistida com aparelho ósseo-suportado. Research, Society and Development, [S. l.], v. 11, n. 2, p. e49811225845, 2022. DOI: 10.33448/rsd-v11i2.25845. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/25845. Acesso em: 1 jul. 2024.

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Ciências da Saúde