Effect of antioxidant agents on bond strength of composite to bleached enamel with 38% hydrogen peroxide
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Data
2011-01-01
Autores
Silva, Juliane Marcela Guimaraes da [UNESP]
Botta, Ana Carolina [UNESP]
Barcellos, Daphne Câmara [UNESP]
Pagani, Clovis [UNESP]
Torres, Carlos Rocha Gomes [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
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.
Descrição
Palavras-chave
dental bleaching, antioxidant agents, enamel, microtensile bond strength
Como citar
Materials Research. ABM, ABC, ABPol, v. 14, n. 2, p. 235-238, 2011.