Abstract

CORREIA VIEIRA, Alex; CASTRO V. ANDRADE, Adriana; OLIVEIRA, Mario Cezar  and  NERY S SILVA, Iane. Influence of low concentration bleaching agents on surface roughness of bovine enamel. RFO UPF [online]. 2016, vol.21, n.3, pp. 338-342. ISSN 1413-4012.

Objective: to assess surface roughness of bovine enamel following the application of hydrogen peroxide-based tooth bleaching agents in 3 different forms of presentation and concentration. Materials and method: specimens obtained from 40 bovine lower central incisors were used. They were randomly divided into four experimental groups (n=10) and subjected to the following bleaching treatments: group 1 (control) - no bleaching treatment; group 2 - bleaching with 7.5% hydrogen peroxide (Total Blanc Home-DFL) for 1 hour over 14 days; group 3 - bleaching with 6.5% hydrogen peroxide (3D White Whitestrips-Crest) for 30 minutes over 14 days; and group 4 - bleaching with 7.7% hydrogen peroxide (Pretty Smile-DMC) for 30 minutes over 14 days. All specimens were subjected to surface roughness readings and data obtained were statistically analyzed by ANOVA and Tukey's test at 5% significance level. Results: all products tested increased the surface roughness of bovine enamel. Conclusion: the use of hydrogen peroxide at low concentrations in the different forms of presentation tested promoted increased surface roughness of bovine tooth enamel, proportional to the application time.

Keywords : Tooth bleaching; Hydrogen peroxide; Dental enamel.