Efficacy of polishing in reducing surface roughness of different restorative materials after tooth whitening

• DOI: https://doi.org/10.22533/at.ed.1594622427066

• Palavras-chave: Surface roughness, dental polishing, composite resins, glass ionomer cement and tooth whitening.

• Keywords: Surface roughness, dental polishing, composite resins, glass ionomer cement and tooth whitening.

• Abstract:

  In current relationships, a smile has the power to influence, both positively and negatively, individuals' interactions. In this sense, a person with a harmonious smile has a great chance of having advantages and success in the social sphere. The present study aimed to evaluate the effectiveness of intraoral polishing of some direct restorative materials in reducing surface roughness after tooth whitening. To carry out this study, the following direct restorative materials were tested: Filtek Z350 XT nanoparticle composite resin (3M-ESPE) and Vittra APS (FGM); and the conventional glass ionomer cements Maxxion R (FGM) and the light-cured Vitro Fill LC (DFL). These were subjected to the whitening procedure with 35% hydrogen peroxide (Whiteness HP Maxx, FGM), simulating the in-office whitening technique, and the use of polishing agents, simulating intra-oral polishing after whitening. After verifying the normality of data distribution, Analysis of Variance (2-factor ANOVA) was applied and subsequently the Kruskall-Wallis Test. According to the results found in this study, the polishing procedure was not effective in reducing the surface roughness of these materials after the bleaching carried out. Therefore, after using whitening gels, it is important to replace the restoration or carry out repairs.