Avaliação da eficácia de dentifrício clareador com corante blue covarine

Abstract

Blue covarine is a whitening agent that induces visual transformations on the surface of teeth. When combined with the abrasive components found in toothpaste, it contributes to tooth whitening. The objective of this study was to compare the whitening effectiveness of toothpastes with blue covarine against those without a whitening agent. This academic research used a total of 39 bovine teeth, divided into 3 groups (n=13): WNGF (toothpaste with blue covarine dye; Closeup), C10 (10% carbamide peroxide gel - Whiteness Perfect - FGM - Brazil), and TA (conventional Triple Action toothpaste; Colgate). The teeth were darkened in a black tea solution until they reached 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 assessed by a blind, pre-calibrated examiner using the Vita Classical scale. The recorded shades were converted into scores to compare whitening effectiveness before and after simulated brushing. The data were analyzed using a 2-way Analysis of Variance (ANOVA-2) for repeated measures and Tukey's test (ⲁ=0.05). The results showed a statistical difference regarding color (p<0.001) and treatment (p<0.001), as well as for the color x treatment interaction (p<0.001). When evaluating the initial and final color of each group individually, a significant statistical difference was found only for C10 (p<0.001). The WNGF (p=0.530) and TA (p=1) groups did not show whitening effectiveness. Thus, it was concluded that toothpaste with blue covarine dye did not demonstrate whitening effectiveness.