Avaliação comparativa da resistência de união ao microcisalhamento de um cimento resinoso autoadesivo na dentina e no esmalte: Estudo in vitro

Autores

DOI:

https://doi.org/10.33448/rsd-v11i7.26569

Palavras-chave:

Cimentos dentários; Resinas compostas; Resistência ao cisalhamento.

Resumo

O objetivo deste estudo foi avaliar a resistência ao cisalhamento de um cimento resinoso autoadesivo RelyX U200 e um cimento resinoso convencional RelyX ARC aderido no esmalte e na dentina. As coroas de 20 dentes incisivos bovinos foram distribuídas em 4 grupos (n=5), de acordo com o substrato e tipo de cimento resinoso utilizado: esmalte-ácido fosfórico-ARC, dentina-ácido fosfórico-ARC, esmalte-U200 e dentina-U200. Os corpos de prova de tamanho 1 × 2 mm foram preparados com resina composta e cimentados de acordo com os respectivos grupos. O teste de microcisalhamento foi realizado após 7 dias de imersão em água destilada em uma máquina universal de ensaio mecânico, com uma célula de carga de 20 kg. Os resultados foram analisados pelo teste de Kruskal-Wallis, sendo as diferenças entre os grupos evidenciadas pelo teste de Dwass-Steel-Critchlow-Fligner (DSCF), e as fraturas com uma lupa estereoscópica de 40X de aumento. A menor resistência ao cisalhamento (MPa) foi no grupo dentina-U200. A mais alta resistência ao cisalhamento foi observada quando o cimento resinoso convencional RelyX-ARC foi utilizado no esmalte e na dentina. A resistência média ao cisalhamento foi maior no caso do cimento resinoso RelyX-ARC em comparação com o RelyX U200 (p˂ 0,05). A maioria das fraturas nos grupos D-ARC e E-ARC foram mistas e nos grupos D-U200 e E-U200 foram adesivas. Foi concluído que o cimento resinoso convencional apresentou maiores valores de resistência ao cisalhamento que o cimento resinoso autoadesivo, tanto em esmalte como em dentina.

Biografia do Autor

Stephanie Bonamin, Universidade Estadual do Oeste do Paraná

Curso de Odontologia

Cassia Thaís Iurkiv Zanatta, Universidade Estadual do Oeste do Paraná

Curso de Odontologia

Stéphane Vanelli da Silva, Universidade Estadual do Oeste do Paraná

Curso de Odontologia

Veridiana Camilotti, Universidade Estadual do Oeste do Paraná

Curso de Odontologia

Márcio José Mendonça, Universidade Estadual do Oeste do Paraná

Curso de Odontologia

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Publicado

02/06/2022

Como Citar

BONAMIN, S.; ZANATTA, C. T. I.; SILVA, S. V. da; CAMILOTTI, V.; MENDONÇA, M. J.; UEDA, J. K. Avaliação comparativa da resistência de união ao microcisalhamento de um cimento resinoso autoadesivo na dentina e no esmalte: Estudo in vitro. Research, Society and Development, [S. l.], v. 11, n. 7, p. e50811726569, 2022. DOI: 10.33448/rsd-v11i7.26569. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/26569. Acesso em: 30 jun. 2024.

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Ciências da Saúde