Abstract

HONORIO, Heitor Marques et al. In vitro evaluation of professional fluoride therapies for improving softening resistance against dental erosion. IJD, Int. j. dent. [online]. 2010, vol.9, n.1, pp. 1-5. ISSN 1806-146X.

This in vitro study evaluated the effect of professional fluoride therapies against enamel erosion. Ninety bovine enamel blocks were randomly allocated to each group: GI-Duraphat® (NaF, 2.26%F), GII-Duofluorid® (NaF, 2.71% F), GIII-TiF4 varnish (2.45% F), GIV- TiF4 solution (2.45% F), GV-no fluoride varnish and GVI-water (control). The varnishes, the solution and water were applied onto the enamel. The blocks were subjected to 6 sequential erosive cycles (cola drink for 10 min and artificial saliva for 50 min, each) per day, during 4 days. After the erosive cycles, the blocks were maintained in artificial saliva for 18 h. Enamel alterations were determined in the 2^nd and 4^th days, by microhardness test (%SMHC). Data were tested using ANOVA and Tukey's tests (p<0.05). The mean %SMHC (±SD) in the 2^nd and 4^th days was, respectively: GI (-78.13±4.08ª and -90.01±2.83ª), GII (-77.70±5.26ª and -89.63±6.08ª), GIII (-88.93±2.65^b and -91.90±2.4^A,B), GIV (-92.23±2.21^b and -97.16±1.43^C), GV (-87.72±2.04^b and -94.16±1.14^B,C) and GVI (-88.10±1.51^b and -93.12±1.93^B). The data from this in vitro study show that NaF varnishes were able to partially prevent softening from dental erosion until the 4^th day of erosive cycle.

Keywords : Erosion; Prevention; Dental enamel; Fluoride; Microhardness.