Palavras-chave
estrutura
mandíbula
Carga imediata no implante dentário
Como Citar
Resumo
Introdução: Para a reabilitação completa de mandíbulas totalmente edêntulas, a opção de carga imediata determina o uso de próteses provisórias que imobilizam os implantes instalados. Embora as próteses provisórias com reforço proporcionem reabilitações com benefícios biomecânicos, a não adoção desta recomendação coexiste em diferentes estudos sobre restaurações imediatas.
Objetivo: Este estudo avalia um tipo de prótese para restaurar mandíbulas pelo conceito all-on-four.
Material e método: O comportamento mecânico das próteses com a estrutura modificada foi avaliado in vitro , sob um ensaio de flexão mecânica unilateral em cantilever. Dois grupos representativos foram incluídos no conceito all-on-four, com um grupo teste G1 (n = 10) contendo estruturas modificadas e um grupo controle G2 (n = 10) que incluiu próteses acrílicas completas. As amostras foram submetidas à termociclagem com 500 ciclos (5 ° ± 2 ° C por 30 se 55 ° ± 2 ° por 30 s) e ao ensaio de flexão mecânica no cantilever.
Resultado: O teste de Mann-Whitney revelou diferença significativa entre G1 e G2 (p <0,001). Na avaliação descritiva, o G1 apresentou média de 830,50 N até a fratura inicial da resina, enquanto o grupo controle apresentou média de 403,58N. A resistência máxima até a fratura completa foi registrada no G1, com média de 903,03N, enquanto no G2, foi registrada uma média de 435,20N. O componente linear vertical da flexão foi de 0,68 mm e 0,39 mm até a fratura inicial da barra, respectivamente para G1 e G2.
Conclusão: A estrutura modificada para o protocolo all-on-four determinou melhor desempenho mecânico quando comparado ao mesmo modelo de prótese acrílica completa.
Referências
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Este artigo é uma cópia com adaptação para o português do Artigo Original "SILVA, Vanessa Araujo, et al. "Biomechanical development and evaluation of a new framework for all-on-four rehabilitation." Revista de Odontologia da UNESP 48 (2019)." Esta Cópia com adaptação para o Português segue os preceitos Creative Commons CC BY 4.0 ( https://creativecommons.org/licenses/by/4.0/deed.pt_BR ) disponibilizado pelo periódico responsável pela publicação original ( https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-25772019000100412 ).
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
Copyright (c) 2020 Vanessa Araujo SILVA , Allyson Henrique de Andrade FONSECA , Dimitri Ribas FONSECA , Paulo Isaías SERAIDARIAN