Clareamento dental com dentifrícios à base de carvão ativado versus peróxido de carbamida 10%

Abstract

Objective: The aim of this in vitro, randomized, double-blind study was to compare the whitening efficacy of activated charcoal dentifrices and 10% carbamide peroxide gel. Materials and Methods: 36 bovine teeth were divided into 3 groups (n=12): BW (dentifrice with Black & White charcoal), LW (dentifrice with Luminous White charcoal) and C10 (10% carbamide peroxide). The teeth were darkened in black tea solution until reaching the A4 color of the Vita scale. The color of the initial and final enamel surface was checked. The BW and LW groups were submitted to 17,000 brushing cycles. In the C10 group, the bleaching treatment was performed. A blinded and previously calibrated examiner evaluated the color of the samples using the Vita Classical scale. Recorded tones were converted into scores. Data 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 the factors of the study color (p<0.001) and bleaching treatment (p<0.001), as well as for the interaction color x bleaching treatment (p<0.001). When evaluating the initial and final color of each group, there was a statistically significant difference for BW (p<0.001) and C10 (p<0.001). The LW group (p=0.785) did not show whitening efficacy. Conclusion: It is concluded that the whitening efficacy of activated charcoal-based dentifrices is product dependent. There was a whitening effect only for the Black & White toothpaste. However, bleaching with 10% carbamide peroxide was more effective.