[A study on the effect of various fluorides on resistance to the erosion of beverage on enamel of primary teeth and remineralization of etched enamel].

OBJECTIVE: To study the effect of several fluorides on resistance to erosion of beverage on enamel and remineralization of etched enamel. METHODS: The enamel slabs were prepared from human retained primary teeth. After treated with 0.1%NaF solution, fluoride Protector and Bifluorid 12 respectively, they were immersed at intervals in beverage. The SMH were measured before and after experiments. Morphological changes of enamel surface were observed by SEM. RESULTS: The SMH of all enamel slabs descended obviously after exposed to beverage. The difference between control group and test groups was significant statistically. The variable degree etch caused by beverage were found by SEM. The SMH of etched enamel increased significantly after treated with fluoride, and the Bifluorid 12 showed the highest significant increase. CONCLUSION: The treatment of enamel with topical fluoride can enhance the resistance of enamel to acid etch of soft drinks and the remineralization of enamel following exposed to beverage. This study recommends the Bifluorid 12 is an efficacious fluoride in remineralization of etched enamel.