Fluoride release from fluoride-releasing orthodontic materials and the effect of saliva on etched enamel Part 2. Effect of fluoride release on etched enamel in artificial saliva

Abstract

The objective of the present study, following by the previous study, was to evaluate the effect of the fluoride (F) release from each material on etched or non-etched bovine enamel in artificial saliva. In this study, a 2% NaF solution and a 6min immersion period for the rechargeable treatment were applied, and then F and Ca concentrations in the artificial saliva with etched or non-etcnhed bovine enamel were determined. Moreover, each enamel specimen was analyzed by EPMA. The results obtained are as follows: (1) F release in artificial saliva was significantly different between the products, but little F rechargeable abilities was observed. (2) A significant negative correlation was observed between F and Ca concentrations for the first two weeks. (3) EPMA analysis showed that the F uptake was increased with F release and was greater for the etched bovine enamel. These result shows that the application of F-releasing material may be beneficial for orthodontic treatment.