The effects of over-the-counter bleaching products on the surface of nanofilled composite
DOI:
https://doi.org/10.7308/aodontol/2020.56.e26Keywords:
Tooth bleaching, Hydrogen peroxide, Composite resinsAbstract
Aim: Tod evaluate the change in surface roughness of a nanoparticulate composite resin (Filtek Z350 XT®) after using over-the-counter bleaching products, containing a low concentration of hydrogen peroxide.
Methods: For this, 30 specimens of this material were made, randomly divided into 3 groups with 10 samples each, as follows: G1 (control group) in which the samples were not subjected to the action of any bleaching product; G2, performing a bleaching procedure with 10% hydrogen peroxide (Crest 3D White Professional Effects Whitestrips®), in 2 applications of 30 minutes, for 10 consecutive days; and G3, treatment with 7.7% hydrogen peroxide (Pretty Smile®), with the same number of applications, time, and days as G2. After this period, each specimen was analyzed, using the Surftest SJ-301, to determine its average surface roughness. These data were then subjected to statistical analysis through analysis of variance (ANOVA) and Tukey’s Test, with a significance level of 5% for multiple comparisons.
Results: Statistically significant differences were found between the control group (G1) and the other groups (G2 and G3), with p < 0.05. However, when analyzing only the groups submitted to bleaching agents with hydrogen peroxide in different concentrations (G2 and G3), no significant difference was found (p > 0.05).
Conclusions: After 10 days, the bleaching products tested in this study determined a significant increase in the average surface roughness values of the nanoparticulate composite resin.
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