Effcts of Diffrent Bleaching Methods on the Enamel Mineralization Level

Abstract

Objective: The aim of the present study is to evaluate the mineralization level of human enamel following bleaching treatmentusing a laser fluorescence device.Methods: A total of 45 patients were divided into three groups according to the bleaching method used. In Group 1, chemicalbleaching was conducted with 35% hydrogen peroxide (HP). In Group 2, we used 35% HP activated by a 980 nm diode laser. InGroup 3, bleaching was conducted with ozone. Levels of mineralization were measured using a laser fluorescence device beforebleaching, just after bleaching and also on the 2-weeks and 1-month following bleaching.Results: Data were analyzed using the Kruskal–Wallis test, one-way analysis of variance, and Mann–Whitney U test. The valueswere significantly higher compared to initial values following bleaching and at the 2-weeks follow-up for Groups 1 and 2 (p0.05). For Group 3, the values were significantly reducedfollowing bleaching (p0.05).Conclusion: Both chemical and laser-activated bleaching resulted in a significant reduction of the mineralization level, whilebleaching with ozone did not. Bleaching with ozone seems to be safer in terms of demineralization compared to HP