Effect of antioxidant agents on bond strength of composite to bleached enamel with 38% hydrogen peroxide

Materials Research

Juliane Marcela Guimaraes Da Silva¹  Ana Carolina Botta¹  Daphne Câmara Barcellos¹  Clovis Pagani¹  Carlos Rocha Gomes Torres¹ 

[1] ,UNESP São José dos Campos School of Dentistry São José dos Campos SP ,Brazil

关键词: dental bleaching;    antioxidant agents;    enamel;    microtensile bond strength;   

DOI  :  10.1590/S1516-14392011005000031

来源: SciELO

【 摘 要 】

This study evaluated the effect of antioxidant agents on microtensile bond strengths (mTBS) of composite to bleached enamel. Fifteen freshly extracted human third molars were selected and randomly assigned to 6 groups (n = 5): (NB) enamel not bleached, (B) bleached enamel, (BR7) bleached enamel and restored 7 days later, (BSA) bleached enamel+sodium ascorbate, (BMC) bleached enamel+malvidin chloride, (BPC) bleached enamel+pelargonidin chloride. The groups were bleached with 38% hydrogen peroxide (HP - Opalescence Xtra Boost) and restored with Single Bond+Filtek Z350. The specimens were thermocycled and submitted to a microtensile load at 1 mm/min crosshead speed. The data were evaluated by ANOVA and Tukey test at 5% of significance. The mean and standard-deviation for all groups were: NB: 30.95(±11.97)a; BSA: 30.34(±8.73)a, BPC: 22.81(6.00)b, BR7: 21.41(±6.12)b, B: 14.10(±4.45)c, BMC: 13.25(±6.02)c. Sodium ascorbate reversed the bond strengths to enamel immediately after bleaching.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License