بررسی تأثیر دو نوع آنتی اکسیدان پوست انار و چای سبز بر استحکام باند برشی کامپازیت میکروهیبرید بر مینای بلیچ شده با استفاده از باندینگ های نسل ششم (مطالعه آزمایشگاهی).

Background and Aim: This research examines the effect of two antioxidants, pomegranate peel extract, and green tea, on the shear bond strength of microhybrid composite on bleached enamel using sixth-generation bonding. Materials and Methods: 44 premolar teeth were used in this study. The samples were divided into 4 groups, Group A: composite restoration without previous bleaching treatment. Group B: Restoration of teeth immediately after bleaching treatment. Group C: Bleaching treatment, then using 5% green tea extract as an antioxidant on the tooth surface, followed by tooth restoration. Group D: Bleaching treatment, then using 5% pomegranate peel extract as an antioxidant on the tooth surface, followed by tooth restoration. For the restoration, the 6th generation Bond SE (Kuraray Dental, Japan) and micro-hybrid composite (3M ESPE, USA) Filtek Z250 were used. To measure the strength of the shear band, the Zwick universal testing machine (Berlin, Germany) was used, and at the end, the types of failure were examined using a stereomicroscope. Calculations were done using PASS II and SPSS 25 software, OneWay ANOVA, Tukey, and homogeneity of variance tests. Results: No significant difference was observed between groups A, C, and D (P>0.99), but between these groups and group B, the amount of shear band strength was significantly different (P<0.001). Conclusion: The use of 5% pomegranate peel extract and green tea increases the shear bond strength of composite to bleached teeth. [ABSTRACT FROM AUTHOR]