Efeito da técnica de inserção e do tempo de fotoativação na dureza de resinas compostas bulk fill

Autores

  • João Felipe Besegato Faculdade de Odontologia de Araraquara
  • Débora de Castro Costa Petrin Universidade Estadual de Londrina
  • Giovana Cazarim da Costa Universidade Estadual de Londrina
  • Lucas Fernando de Oliveira Tomaz Ferraresso Universidade Estadual de Londrina
  • Márcio Grama Hoeppner Universidade Estadual de Londrina

DOI:

https://doi.org/10.11606/issn.2357-8041.clrd.2020.170336

Palavras-chave:

Resinas Compostas, Polimerização, Dureza

Resumo

Objetivos: Avaliar o efeito da técnica de inserção e do tempo de fotoativação na dureza Vickers de resinas compostas bulk fill (RCBF). Materiais e método: RCBF de alta viscosidade Opus Bulk Fill (OBF) e de baixa viscosidade Opus Bulk Fill Flow (OBFF) foram inseridas em matrizes cilíndricas com altura e diâmetro interno de 4 mm, e divididas em seis grupos (G), de acordo com a técnica de inserção (I1 – incremento único de 4 mm e I2 – dois incrementos de 2 mm) e do tempo de fotoativação de cada incremento com irradiância de 1000 mW/cm2 (T1 – 20 segundos e T2 – 40 segundos): G1 – OBFI1T1, G2 – OBFI2T1, G3 – OBFI1T2, G4 – OBFI2T2, G5 – OBFF+OBFI2T1 e G6 – OBFF+OBFI2T2. A dureza foi avaliada na superfície topo e base das amostras. ANOVA dois critérios seguido de pós-teste de Tukey foram utilizados em nível de significância de 5%. Resultados: Não houve diferença na dureza da superfície topo das amostras, independentemente da técnica de inserção e do tempo de fotoativação. Entretanto, na superfície base, houve diferença entre as técnicas de inserção e os tempos de fotoativação, exceto entre G3 e G4. Todas as amostras apresentaram redução significativa de dureza na base em relação ao topo. Conclusão: Pode-se concluir que a fotoativação com menor tempo de exposição deve ser considerada com cautela, pois resultou na redução da dureza na área mais distante da fonte emissora da luz. OBFF apresentou dureza menor que OBF, independentemente do tempo de fotoativação.

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Biografia do Autor

  • João Felipe Besegato, Faculdade de Odontologia de Araraquara

    Departamento de Odontologia Restauradora, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista (Unesp), Araraquara, SP, Brasil

  • Débora de Castro Costa Petrin, Universidade Estadual de Londrina

    Departamento de Odontologia Restauradora, Universidade Estadual de Londrina (UEL), Londrina, PR, Brasil

  • Giovana Cazarim da Costa, Universidade Estadual de Londrina

    Departamento de Odontologia Restauradora, Universidade Estadual de Londrina (UEL), Londrina, PR, Brasil

  • Lucas Fernando de Oliveira Tomaz Ferraresso, Universidade Estadual de Londrina

    Departamento de Odontologia Restauradora, Universidade Estadual de Londrina (UEL), Londrina, PR, Brasil

  • Márcio Grama Hoeppner, Universidade Estadual de Londrina

    Departamento de Odontologia Restauradora, Universidade Estadual de Londrina (UEL), Londrina, PR, Brasil

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Publicado

2020-08-20

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Revisão de literatura