Avaliação da eficácia de dentifrícios clareadores à base de carvão ativado e peróxido de hidrogênio

Abstract

Introduction: Charcoal and hydrogen peroxide have aroused the interest of a large part of the population due to their bleaching properties. Objective: To evaluate the whitening efficacy of dentifrice with activated charcoal and dentifrice with hydrogen peroxide. Material and method: A total of 52 bovine teeth were divided into 4 groups (n=13): BW (Black & White charcoal dentifrice; Curaprox), LWA (Hydrogen peroxide dentifrice - Colgate Luminous White Advanced), C10 (Gel of 10% carbamide peroxide - Whiteness Perfect - FGM - Brazil) and TA (conventional Triple Action toothpaste; Colgate). The teeth were darkened in black tea solution until reaching the A4 color of the Vita Classical scale. These groups were subjected to 17,000 brushing cycles. The initial and final color of the samples was verified by a blind and previously calibrated examiner, using the Vita Classical scale. The recorded shades were converted into scores for comparing the whitening efficacy before and after simulated brushing. The data found were subjected to 2-way Analysis of Variance (ANOVA-2) for repeated measures and Tukey's test (ⲁ =0.05). Results: There was a statistical difference in relation to color (p<0.001) and bleaching treatment (p<0.001), as well as color x bleaching treatment (p<0.001). When evaluating the initial and final color of each group individually, there was a statistically significant difference only for BW (p<0.001) and C10 (p<0.001). The TA (p=1) and LWA (p=0.089) groups showed no statistically significant difference. Conclusion: The Black & White dentifrice, based on activated charcoal, presented a whitening effect, whereas the whitening dentifrice with hydrogen peroxide in its composition did not present a whitening effect.