EFFECT OF DIFFERENT FLUORIDES COMBINED WITH ER: YAG LASER TO CONTROL THE PROGRESSION OF DENTIN EROSION

Fabiana Almeida Curylofo-Zotti, Renata Siqueira Scatolin, Vivian Colucci, Adrielly Garcia Ortiz, Rodrigo Galo and Silmara Aparecida Milori Corona*

ABSTRACT

This in vitro study aimed to evaluate the effect of the association of different types of fluorides with Er:YAG laser irradiation on demineralization of the eroded dentin. Slabs of bovine dentin (3x3x2mm) were submitted to 4 erosive challenges in orange juice (pH=3.84) for 5 minutes, 2x/day, during 2 days. After cycles, slabs were assigned into four groups, according to surface treatment: I. placebo gel-control + Er:YAG laser; II. titanium tetrafluoride gel + Er:YAG laser and III. sodium fluoride gel + Er:YAG laser. After surface treatment, new erosive challenges were performed following the same protocol. The microhardness analysis was performed after erosion-like lesion formation, after treatment and after subsequent erosive challenges. Data were submitted to analysis of variance (ANOVA) followed by DUNCAN test, at significance level of 5%. After subsequent erosive challenge, TiF4 + Er:YAG laser (121.1 ± 3.7) and NaF + Er:YAG (110.8 ± 3.4) laser showed significantly higher microhardness values, followed by the group Placebo + Er:YAG laser (106.2 ± 3.9). The use of titanium tetrafluoride gel and sodium fluoride gel, associated with Er:YAG laser can be an alternative to control demineralization of the eroded dentin.

Keywords: Erosion, titanium tetrafluoride, sodium fluoride, demineralization, laser & microhardness.