Wear and surface roughness of bovine enamel submitted to bleaching.

摘要: The present study evaluated surface roughness and wear of bovine enamel following three different bleaching techniques simulated brushing. Initial (Ra) was teeth were randomly divided into 4 groups (n = 10): Group 1, control; 2, 35% hydrogen peroxide (HP) activated by a hybrid light; 3, HP halogen 4, 16% carbamide peroxide. After bleaching, measured subjected to 100,000 cycles brushing, the final determined. Data statistically analyzed ANOVA Tukey test (P < 0.05). There no significant differences among comparing initial postbleaching roughness. found between control experimental groups. showed increase in values compared with 2. group significantly less than other Bleaching promoted increased enamel, when submitted Tooth after can larger alteration amount due