Effect of Epigallocatechin Gallate on shear bond strength of composite resin to bleached enamel: an in vitro study
Khamverdi Zahra, Rezaei Soufi Loghman, Kasraei Shahin, Ronasi Negin, Rostami Shiva,
소속 상세정보
( Khamverdi Zahra ) - Hamadan University of Medical Sciences Dental School Department of Operative Dentistry Member of Dental Research Center
( Rezaei Soufi Loghman ) - Hamadan University of Medical Sciences Dental School Department of Operative Dentistry Member of Dental Research Center
( Kasraei Shahin ) - Hamadan University of Medical Sciences Dental School Department of Operative Dentistry Member of Dental Research Center
( Ronasi Negin ) - Hamadan University of Medical Sciences Dental School Department of Oral Medicine
( Rostami Shiva ) - Iran Kordestan University of Medical Sciences Department of Operative Dentistry
KMID : 1034420130380040241
Abstract
Objectives: The aim of this study was to determine the effect of epigallocatechin gallate (EGCG) on the shear bond strength of composite resin to bleached enamel.
Materials and Methods: Ninety enamel surfaces of maxillary incisors were randomly divided into 9 groups as follows: G1: control (no bleaching); G2: bleaching; G3: bleaching and storage for seven days; G4 - 6: bleaching and application of 600, 800 and 1,000 μmol of EGCG-containing solution for 10 minutes, respectively; G7 - 9: bleaching and application of 600, 800 and 1,000 μmol of EGCG-containing solution for 20 minutes, respectively. The specimens were bleached with 30% hydrogen peroxide gel and a composite resin cylinder was bonded on each specimen using a bonding agent. Shear bond strength of the samples were measured in MPa. Data was analyzed using the two-way ANOVA and Tukey HSD tests (α = 0.05).
Results: The maximum and minimum mean shear bond strength values were observed in G1 and G2, respectively. Time and concentration of EGCG showed no significant effects on bond strength of the groups (p > 0.05). Multiple comparison of groups did not reveal any significant differences between the groups except for G2 and all the other groups (p < 0.05).
Conclusions: There is a significant decrease in bond strength of composite resin to enamel immediately after bleaching. A delay of one week before bonding and the use of EGCG increased bond strength of composite resin to bleached enamel.
키워드
Antioxidant; Epigallocatechin gallate; Green tea; Shear bond strength; Tooth bleaching
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