Effect of Proanthocyanidins on Durability of Dentin Bonding at Different Dentin Depths

doi:10.13701/j.cnki.kqyxyj.2020.04.016

Abstract

Abstract: Objective: To investigate the effect of proanthocyanidins on the durability of dentin bonding at different dentin depths. Methods: 40 third molars were randomly divided into 8 groups (n=5): group A and A1: shallow + 6.5% PA; group B and B1: shallow + ethanol; group C and C1: deep + 6.5% PA; group D and D1: deep + ethanol. Specimens of groups A1, B1, C1 and D1 were conducted aging test. The shear bond strength of all specimens was tested. The fracture mode was counted and the fracture surface morphology was observed under scanning electron microscope. Results: The main effect of "aging", "dentin depth", and "PA" was statistically significance (P<0.05), and the second-order and third-order interaction effects had no statistically significance. The main fracture mode of all groups was mixed fracture. The resin tags of group A1 and C1 were closely filled in dentine tubules, while the dentine tubules and resin of group B1 and D1 appeared to be dissolved. Conclusion: PA can enhance the immediate shear bond strength of dentin and improve the bonding durability. The shear bond strength of deep dentin is lower than that of superficial dentin

Key words: proanthocyanidins, dentin depth, shear bond strength, bonding durability

LIU Wen, LIU Min, DENG Ting, WANG Wen, ZHENG Yuemei, GUO Lin, XIE Cuiliu. Effect of Proanthocyanidins on Durability of Dentin Bonding at Different Dentin Depths[J]. Journal of Oral Science Research, 2020, 36(4): 372-376.

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