Comparação do desempenho de dentifrícios fluoretados na remineralização do esmalte erodido

Abstract

ABSTRACT Introduction: Dental erosion is defined as the substance loss of dental surface by a chemical process of exposure and acid dissolution without bacteria involvement. Objective: to evaluate and compare, in vitro, the performance of fluoride dentifrices, with or without controlled fluoride release system, in the process of remineralization of eroded enamel. Materials and Methods: 90 human enamel specimens (4x4x2mm) were used, divided into 6 groups (n = 15): G1 (100% NaF - positive control); G2 (Placebo - negative control); G3 (50% NanoF + 50% free NaF), G4 (100% NanoF); G5 (Sensodyne® Pronamel™) and G6 (Colgate® Sensitive Pro-Relief™). Before and after the formation of the erosion lesion, the microhardness analysis, SH0 and SH1, respectively, were performed. For the remineralizing treatment, 5ml/slurry block (1:3), along with 1ml/block of human saliva, was used for 1min (4x/day) for five days. At the end of the cycling, the final microhardness analysis (SH2) and the surface microhardness remineralization percentage (%SMHR) were calculated. The data were analyzed statistically with significance level of 5% (p<0,05). Results: Statistically significant differences were found between the groups for the SH2 variable, (p<0,05), but not for SH0 and SH1 (p>0,05). Statistically significant differences (p<0,05) were observed only for SH2 and %SMHR between G2 and G6 and the other groups. Conclusion: Experimental dentifrices with the fluorinated release system and Sensodyne® Pronamel™ presented a satisfactory remineralizing effect on eroded enamel and similar performance as the positive control. Colgate® Sensitive Pro-Relief™ was similar to placebo.