Effects of five carbamide peroxide bleaching gels on composite resin microhardness.
Nenhuma Miniatura disponível
Data
2010-09-07
Autores
Briso, André Luiz Fraga [UNESP]
Tuñas, Inger T C
de Almeida, Letícia C A G
Rahal, Vanessa
Ambrosano, Glaucia M B
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The purpose of this study was to evaluate the effects of five home bleaching products containing 15-16% carbamide peroxide on the microhardness of microhybrid composite resin Z-250 (3M/Espe). A total of 72 specimens were fabricated in cylindrical acrylic matrices (4 x 2 mm), filled with composite resin and photo-activated for 40 seconds. They were divided in 6 study groups (n = 12), according to the bleaching product: Review (SS White), Magic Bleaching (Vigodent), Opalescence (Ultradent), Whiteness Perfect (FGM), Claridex (Biodinâmica), and a control group (not bleached). Specimens were exposed to 1 cc of bleaching gel for 6 hours daily for 2 weeks. The control group specimens were kept in artificial saliva throughout this time. All the specimens were then analyzed in a microhardness tester. Knoop hardness measurements were performed, and the results were submitted to parametric statistical analysis (analysis of variance and Tukey's test). Mean Knoop values and standard deviation were: baseline, 68.52a (4.28); control, 63.42b (7.16); Whiteness Perfect, 57.57c (1.81); Magic Bleaching, 57.22c (3.84); Opalescence, 57.03cd (4.00); Claridex, 53.64de (3.33); Review 51.45e (2.82). Identical letters mean statistical equality according to Tukey's test at the 5% significance level. The products significantly decreased Z-250 (3M/Espe) microhardness.
Descrição
Palavras-chave
drug derivative, peroxide, resin, urea, urea peroxide, dental care, evaluation, gel, hardness, Composite Resins, Gels, Hardness Tests, Peroxides, Tooth Bleaching, Urea
Como citar
Acta odontológica latinoamericana : AOL, v. 23, n. 1, p. 27-31, 2010.