Effect of thermocycling to adhesive interface of enamel analyzed by polarized light microscopy

Autores

  • Rafael Simões Gonçalves Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
  • Naiara Montes da Silva Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.
  • Mauricio Umeno Watanabe Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.
  • Mirela Sanae Shinohara Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.

DOI:

https://doi.org/10.14295/bds.2016.v19i4.1346

Resumo

Objective: The less aggressive demineralization of enamel by self-etching systems results in greater staining, marginal leakage, and failure in their restorations, so this study aimed to assess the silver nitrate infiltration and tag formation of the enamel/adhesive interface. Material and Methods: Two hundred enamel fragments were randomly assigned into 10 groups according to the adhesive system (Single Bond Adper Plus-(SB), Clearfil Tri-S Bond-(CF), or Scotchbond Universal-(SBU)) and enamel surface (ground-(ge), unground-(ue), phosphoric acid etching-(pha), or none) (n=10): (SB-ue), (SB-ge), (CF-ue), (CF-ge), (CF-ue/pha), (CF-ge/pha), (SBU-ue), (SBU-ge), (SBU-ue/pha), and (SBU-ge/pha). Half of the restored samples were submitted to thermocycling. Four slices of 1.0mm/sample were obtained to evaluate tag formation and silver nitrate infiltration. All of the specimens were examined with Polarized Light Microscopy, and the percentage of infiltration was quantified. Results: No interactions were found among the three factors. The adhesive and aging exhibited an interaction. Significant differences were found only after thermocycling: the SB and SBU-etched groups had decreased infiltration compared with the other groups. The tag length after etching was higher for ge compared with ue, regardless of the adhesive system. Conclusion: The self-etching techniques resulted in significantly less tag formation compared with the conventional technique.

Keywords

Adhesives; Aging; Dental enamel; Microscopy, polarization; Silver nitrate.

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Biografia do Autor

  • Rafael Simões Gonçalves, Department of Dentistry, Endodontic and Dental Materials – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
    Department of Dentistry, Endodontic and Dental Materials
  • Naiara Montes da Silva, Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.
    Department of Restorative Dentistry
  • Mauricio Umeno Watanabe, Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.
    Department of Restorative Dentistry
  • Mirela Sanae Shinohara, Department of Restorative Dentistry – Araçatuba Dental School – UNESP – Univ Estadual Paulista – Araçatuba – São Paulo – Brazil.
    Department of Restorative  Dentistry

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Publicado

2016-11-29

Edição

v. 19 n. 4 (2016): Oct. - Dec. / 2016 - Published November 2016

Seção

Artigos de Pesquisa Clínica ou Laboratorial

Licença

A revista Brazilian Dental Science utiliza a licença Creative Commons (CC-BY 4.0), preservando assim a integridade dos artigos em um ambiente de acesso aberto. A revista permite que o autor mantenha os direitos de publicação sem restrições.

Como Citar

1.
Gonçalves RS, da Silva NM, Watanabe MU, Shinohara MS. Effect of thermocycling to adhesive interface of enamel analyzed by polarized light microscopy. BDS [Internet]. 29º de novembro de 2016 [citado 22º de agosto de 2026];19(4):98-109. Disponível em: https://ojs.ict.unesp.br/index.php/cob/article/view/1346

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