Abstract
This study aimed to evaluate in vitro action varnishes with high and low concentration of fluorides and supplemented with trimetaphosphate about the erosion associated or not the abrasion. After polishing 360 bovine enamel blocks (4x4mm) will be selected by means of surface microhardness (SMH initial). Below will be divided into 12 groups (n=30) in accordance with the number of days of tr…