Effect of carbamide peroxide-based bleaching agents containing fluoride or calcium on tensile strength of human enamel
作者： Marcelo Giannini , Alessandra Peres Silva , Vanessa Cavalli , Adriana Franco Paes Leme
DOI: 10.1590/S1678-77572006000200004
关键词: Dental enamel 、 Enamel paint 、 Nuclear chemistry 、 Carbamide peroxide 、 Fluoride 、 Mineralogy 、 Chemistry
摘要: OBJETIVO: O proposito deste estudo foi avaliar os efeitos de agents clareadores a base peroxido carbamida (CPG) contendo fluoreto (CF) e calcio (CCa) na resistencia tracao do esmalte (UTS). METODO: Um bloco resina composta confeccionada superficie oclusal vinte dois terceiros molars higidos para facilitar preparacao dos especimes o teste micro-tracao. Os dentes restaurados foram seccionados com disco diamantado no sentido vestibulo-lingual em fatias aproximadamente 0,7 mm espessura. Com uma ponta diamantada, realizada constricao regiao da vertente interna. apresentaram 0,5 mm2 area seccao transversal divididos 12 grupos (n=11). controles nao submetidos ao regime clareador experimentais tratados gel CPG 10% ou formulacoes CF (0,2% 0,5%) CCa (0,05% 0,2%). receberam aplicacao CPGs por 6 horas/dia 37oC, durante 14 dias consecutivos armazenados saliva artificial (AS) umidade relativa 100% (RH), entre as aplicacoes clareador. Apos clareamento, testados atraves metodo micro-tracao (0,5 mm/min). dados analisados pela ANOVA (2 fatores) Tukey (5%). RESULTADOS: Nenhuma diferenca observada AS RH. Cca similar UTS aos clareados. CONCLUSAO: Ambos or alteraram apos tratamento
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