Importance of post-bleaching time interval on the marginal seal of class V composite resin restorations

Authors

  • Beatriz Togoro Ferreira da Silva Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
  • Alessandra Pereira de Andrade Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
  • Cynthia Soares de Azevedo Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
  • Rubens Côrte Real de Carvalho Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
  • Adriana Bona Matos Departament of Restorative Dentistry, School of Dentistry, University of São Paulo

DOI:

https://doi.org/10.11606/issn.2357-8041.v20i2p74-81

Keywords:

Tooth Bleaching, Composite Resins, Dental Leakeage.

Abstract

The aim of this study was to evaluate changes in mineral content of bleached enamel and the infl uence of post-bleaching time interval on the marginal seal of class V composite restorations. Forty bovine incisors were restored using Magic Bond adhesive and Fill NT Premium composite according to the manufacturer’s instructions. The teeth were randomly divided into 4 experimental groups (n = 10): G1, not bleached (control); G2, bleached and immediately restored; G3, bleached and restored after 7 days; G4, bleached and restored after 14 days. The mineral content was evaluated by QLF (quantitative light-induced fl uorescence). The microleakeage scores were analyzed by 3 calibrated examiners. There was no statistical difference between the groups regarding change of the bleached mineral substrate (repeated measures ANOVA, p = 0.2130) and the microleakage scores (Friedman, p = 0.2551). It was concluded that the bleaching protocol used is safe because it does not cause mineral changes in the bleached enamel, and that the post-bleaching time interval observed before performing adhesive procedures did not affect the marginal seal of composite resin restorations.

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Author Biographies

  • Beatriz Togoro Ferreira da Silva, Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
    Aluna de Iniciação Científica - Departamento de Dentística
  • Alessandra Pereira de Andrade, Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
    Pós-Doutora - Departamento de Dentística
  • Cynthia Soares de Azevedo, Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
    Aluna de Doutorado - Departamento de Dentística
  • Rubens Côrte Real de Carvalho, Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
    Professor Titular - Departamento de Dentística
  • Adriana Bona Matos, Departament of Restorative Dentistry, School of Dentistry, University of São Paulo
    Professora Titular - Departamento de Dentística FOUSP

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Published

2014-03-14

Issue

Vol. 20 No. 2 (2014)

Section

Original Research

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