Características mecânicas e ópticas de resinas bulk-fill: revisão de literatura
DOI:
https://doi.org/10.5335/rfo.v23i1.7675Abstract
Objetivo: realizar uma análise descritiva das características mecânicas e ópticas das resinas bulk-fill com base em dados da literatura. Revisão da literatura: para a realização do estudo, foram utilizados artigos extraídos das bases de dados PubMed, SciELO e Lilacs. As palavras-chave utilizadas para busca foram: resina bulk-fill, resina composta, polimerização, grau de conversão, caracterização, dureza, rugosidade, resistência à flexão, translucidez, propriedades ópticas. Os compostos bulk-fill são basicamente formados por matriz orgânica e partículas de alumínio, silício e bário, medindo de0,1 μm a 1 μm. Tratam-se de resinas translúcidas que podem ser polimerizadas adequadamente em camadas espessas, possuem propriedades mecânicas aceitáveis, porém inferiores às resinas nano e micro-híbridas, e têm baixo grau de contração volumétrica e menor tensão decontração do que as resinas compostas convencionais. Considerações finais: as resinas bulk-fill são indicadas para restauração de cavidades com fator de contração cavitário desfavorável. A cobertura dessas resinas com2 mm de resina composta convencional em área oclusal é recomendável. Palavras-chave: Propriedades mecânicas. Propriedade sópticas. Resina.Downloads
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