Evaluation of tooth color after bleaching with and without light-activation Avaliação da coloração dental após clareamento com e sem ativação por luz

摘要: Purpose: The use of different light sources as an adjunct to in-office bleaching has been questioned. Thus, the aim this study was evaluate color changes teeth after application techniques with products, and without activation by a LED-laser system. Methods: Twenty-four bovine surfaces were submitted three two commercially available 35% hydrogen peroxide agents (n=8). specimens immersed in red wine for 48 h at 37°C techniques. Color measured before staining well immediately 24 treatments, methods evaluation, software ScanWhite V1.1 intra-oral spectrophotometer (Vita Easyshade). Data analyzed ANOVA Kruskal-Wallis test. Results: statistical analysis showed that there no statistically significant difference 5% significance level between groups, independently evaluation time, or systems. Conclusion: results suggested did not influence changes.