Keywords
Charcoal
Dentifrices
Hydrogen peroxide
Tooth bleaching
Metrica
How to Cite
Abstract
Aim: To evaluate if whitening dentifrices change enamel color and if their use induces alteration over the enamel and dentin roughness. Methods: Forty enamel and forty dentin bovine samples (4 mm x 4 mm, n=80) were divided into four groups following the dentifrice tested: Char - activated charcoal (3D White Therapy Charcoal); HP - low concentration of hydrogen peroxide (Colgate Luminous White Advanced); Cov –blue covarine (Close Up White Now); and Cont – control (Colgate Total 12). Initial enamel color coordinates (L*a*b*) were obtained, followed by enamel and dentin Ra measurements. Specimens were submitted to an abrasive cycle (20 s abrasion, 3x/day, 14 days). After, the final Ra and color were obtained, and the delta E was calculated. Roughness data were submitted to repeated measures ANOVA, and color alterations were assessed by one-way ANOVA, followed by the Tukey test. Results: The dentifrice Char reduced the enamel Ra and presented lower values than the Cont and Cov, while Cont increased the Ra and HP reduced it for dentin. Regarding enamel color, there was no significant difference between the dentifrices. Conclusion: The dentifrices could not promote enamel whitening, and their use shall be cautiously indicated as they can induce surface harm, mainly over dentin.
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