Artículos de revistas
Effect of antioxidant agents on bond strength of composite to bleached enamel with 38% hydrogen peroxide
Fecha
2011-01-01Registro en:
Materials Research. ABM, ABC, ABPol, v. 14, n. 2, p. 235-238, 2011.
1516-1439
10.1590/S1516-14392011005000031
S1516-14392011000200016
WOS:000292723200016
S1516-14392011000200016.pdf
5130377144315365
3135367849609938
0000-0002-1074-5319
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.