RELATIONSHIP BETWEEN MICROHARDNESS AND FLUORINE CONTENTS ON TOOTH ENAMEL DETERMINED BY PIGE ANALYSIS

The remineralization effect of fluoride has been measured by surface m icrohardness on tooth enamel. The purpose of this study was to investi gate the relationship between microhardness and fluorine concentration on tooth enamel. Twelve sound bovine enamel specimens were prepared a nd immersed in 0.05% NaF solution for 1, 3, 6, 24 and 36 hours, respec tively. The concentration of fluorine in specimens were measured by PI GE analysis and surface microhardness of each specimen was measured by surface microhardness tester. Fluorine concentration was increased by immersing time. There was no change in microhardness of each specimen by fluorine content. The results of this study suggest that there was no relationship between the fluorine concentration and surface microh ardness in sound tooth enamel. PIGE analysis can be used effectively t o assess the remineralization effect of fluorine content in tooth enam el.