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Type: Artigo
Title: Effects of bleaching agents combined with regular and whitening toothpastes on surface roughness and mineral content of enamel
Author: Attia, Mariana Lerner
Cavalli, Vanessa
Santo, Ana Maria do Espírito
Martin, Airton Abrahão
D'Arce, Maria Beatriz Freitas
Aguiar, Flávio Henrique Baggio
Lovadino, José Roberto
Rego, Marcos Augusto do
Cavalcanti, Andréa Nóbrega
Liporoni, Priscila Christiane Suzy
Abstract: The purpose of this study was to evaluate surface roughness and changes in the composition of enamel submitted to different bleaching protocols and toothbrushing with regular and whitening toothpastes.Bleaching treatment could promote morphological and chemical changes in enamel surface. Enamel blocks were randomized into nine groups (n=10) according to the bleaching treatment (no bleaching, control group; 6% hydrogen peroxide, HP; or 10% carbamide peroxide, CP) and toothpaste used (placebo, PL; regular, R; or whitening dentifrice, W). Bleaching was performed according to manufacturers' instructions and all groups were submitted to 30,000 cycles of simulated toothbrushing with toothpaste (PL, R, or W). Mineral content evaluation and enamel roughness were evaluated initially (T1), after bleaching (T2), and after toothbrushing (T3), using an energy-dispersive micro X-ray fluorescence spectrometer and profilometry, respectively. Data were statistically analyzed with two way ANOVA, Tukey, and Dunnett tests (5%). Enamel surface roughness was influenced by bleaching and toothbrushing. Surface roughness increased for the groups that brushed with the placebo dentifrice (CP+PL, HP+PL, C+PL) and for the control group that brushed with whitening dentifrice (C+W). Enamel Ca/P ratio decreased after bleaching, but toothbrushing, regardless of the dentifrice used, did not reduce the enamel mineral content.The bleaching treatment resulted in a decrease of enamel mineral content, but the studied dentifrices did not contribute to surface mineral loss
Subject: Dentifrícios
Country: Estados Unidos
Editor: Mary Ann Liebert, Inc. Publishers
Rights: Fechado
Identifier DOI: 10.1089/pho.2014.3835
Date Issue: 2015
Appears in Collections:FOP - Artigos e Outros Documentos

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