Bleaching Gels Containing Calcium and Fluoride: Effect on Enamel Erosion Susceptibility

Autor(es)

Borges, Alessandra B. ; Torres, Carlos R. G. ; de Souza, Paulo A. B. ; Caneppele, Taciana M. F. ; Santos, Luciana F. T. F. ; Carolina Magalhaes, Ana

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF DENTISTRY; v. 2012, p. 6-pg., 2012-01-01.

Resumo

This in vitro study evaluated the effect of 35% hydrogen peroxide (HP) bleaching gelmodified or not by the addition of calcium and fluoride on enamel susceptibility to erosion. Bovine enamel samples (3mm in diameter) were divided into four groups (n = 15) according to the bleaching agent: control-without bleaching (C); 35% hydrogen peroxide (HP); 35% HP with the addition of 2% calcium gluconate (HP + Ca); 35% HP with the addition of 0.6% sodium fluoride (HP + F). The bleaching gels were applied on the enamel surface for 40min, and the specimens were subjected to erosive challenge with Sprite Zero and remineralization with artificial saliva for 5 days. Enamel wear was assessed using profilometry. The data were analyzed by ANOVA/Tukey's test (P < 0.05). There were significant differences among the groups (P = 0.009). The most enamel wear was seen for C (3.37 +/- 0.80 mu m), followed by HP (2.89 +/- 0.98 mu m) and HP + F (2.72 +/- 0.64 mu m). HP + Ca (2.31 +/- 0.92 mu m) was the only group able to significantly reduce enamel erosion compared to C. The application of HP bleaching agent did not increase the enamel susceptibility to erosion. However, the addition of calcium gluconate to the HP gel resulted in reduced susceptibility of the enamel to erosion. (AU)

• Processo FAPESP: 09/18588-9 - Efeito de agentes clareadores experimentais sobre a susceptibilidade do esmalte submetido a desafios erosivos in vitro
• Beneficiário: Paulo Alberto Bicudo de Souza
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 12/16307-5 - Efeito de agentes clareadores contendo calcio e flúor nasusceptibilidade do esmalte à erosão
• Beneficiário: Taciana Marco Ferraz Caneppele
• Modalidade de apoio: Auxílio à Pesquisa - Publicações científicas - Artigo