Abstract

BELLO, Mariana De Carlo et al. Analysis of fluorescence intensity in different composites after exposure to different concentrations of carbamide peroxide home bleaching agents. RFO UPF [online]. 2013, vol.18, n.1, pp. 44-48. ISSN 1413-4012.

Objective: the aim of this study was to evaluate the influence of different concentrations of carbamide peroxide (CP) bleaching agents on the fluorescence of three composites. Methods: twenty-seven specimens were made and divided into 9 groups (n = 3), which were stored in deionized water, exposed to 10% CP for 6 hours/day and 22% CP for 1 hour/day, for 14 days. Then, fluorescence measurements were taken in a spectrophotometer. The fluorescence intensity values obtained were submitted to the Shapiro-Wilk, Levene, and Games-Howell tests (p < 0.05). Results: the mean fluorescence intensity for the control groups of Esthet-X and Opallis composites showed no statistically significant differences. However, the composite Charisma showed statistically different fluorescence intensity from the other composites. After exposed to the different bleaching agents, only Charisma composite exposed to 22% CP showed statistically significant changes, increasing its fluorescence. Conclusion: fluorescence intensity may be affected by the action of carbamide peroxide bleaching agents, depending on its concentration and the composite characteristics.

Keywords : Resin composite; Fluorescence; Bleaching agents.