Estabilidade óptica e rugosidade superficial de resina composta nanoparticulada após escovação com produtos over the counter

Abstract

The aim of this study was to evaluate changes in the physical properties of color and roughness of a nanoparticulate monochromatic composite resin after brushing with oral care products with whitening properties. A total of 48 samples (10 mm x 2 mm) of composite resin (Vittra APS Unique - FGM Dentalgroup) were made and randomly divided into 4 groups (n=12): distilled water (negative control), Colgate Maximum Caries Protection (CMPA) (positive control), Colgate Luminous White Lovers Coffee (CLWCL) and Rizu Tinting Serum (RIZU). Quantitative analyses were carried out to determine color (ΔL, Δa, Δb, ΔEab and ΔE00), according to the CIELab and CIEDE 2000 color systems, and roughness (Ra), at the following times: initial, after staining with coffee and after brushing. The data was tested for normality (Shapiro-Wilks test) and then the appropriate statistical tests were chosen. A significance level of 5% was considered. ΔL was analyzed by ANOVA with Benjamini, Krieger and Yekutieli post-hoc tests. Δa was analyzed by Kruskal-Wallis and ANOVA. The Δb, ΔEab and ΔE00 data were analyzed using the ANOVA and Kruskal-Wallis comparative tests with Benjamini, Krieger and Yekutieli post-hoc tests. The roughness of the samples was analyzed using the Kruskal-Wallis multiple comparison test with Benjamini, Krieger and Yekutieli post-hoc. The results indicate that the color of the composite resin did not change with the treatments carried out. Roughness (Ra) was not affected by the different treatments, but increased after staining. In conclusion, none of the OTC products tested were able to significantly alter the color and roughness of monochromatic composite resin.