EFFECT OF GRAPE SEED EXTRACT ON BOND STRENGTH OF RESTORATIVE MATERIAL TO BLEACHED ENAMEL

Authors

  • Keille Adriene de Castro Pereira Department of Dentistry, University Center Hermínio Ometto - Uniararas, Araras, SP, Brasil
  • Ana Luisa Botta Martins de Oliveira Department of Dentistry, University Center Hermínio Ometto - Uniararas, Araras, SP, Brasil
  • Aline Evangelista de Souza-Gabriel 2Department of Restorative Dentistry, Dentistry School, São Paulo University, Ribeirão Preto, SP, Brasil
  • Silmara Aparecida Milori Corona 2Department of Restorative Dentistry, Dentistry School, São Paulo University, Ribeirão Preto, SP, Brasil
  • Renata Siqueira Scatolin 2Department of Restorative Dentistry, Dentistry School, São Paulo University, Ribeirão Preto, SP, Brasil

DOI:

https://doi.org/10.29327/24816.3.3-10

Keywords:

Adhesion, Tooth whitening, Grape seed extract

Abstract

Objective: The aim of this study was to evaluate the effect of different concentrations of a natural antioxidant (grape seed extract) on the bond strength of the restorative material to the bleached enamel. Methods: Forty fragments of healthy bovine incisors were randomly divided into four groups (n = 10): Group I: no bleaching; Group II: Bleaching with 35% hydrogen peroxide (HP) and without post-treatment; Group III: Bleaching with 35% HP + 5% grape seed extract; and Group IV: Bleaching with 35% HP + 10% grape seed extract. The bond strength at the adhesive interface was evaluated using the shear test (MPa). The data were analyzed by the analysis of variance (ANOVA) and Tukey test ( =0.05%). The fracture types were also analyzed and classified into: adhesive, cohesive or mixed. Results: Only Group III (bleached + 5% grape seed extract) had a  significant increase (p<0.001) in bond strength values when compared to Group II bleached, without post-treatment). All groups showed a predominance of the adhesive type of fracture. Conclusion: It could be concluded that tooth bleaching decreases the bond strength to bleached enamel and 5% grape seed extract applied after dental bleaching improves the bond strength between the restorative material and the bleached enamel.

Published

2019-01-15