Fluoride Uptake by Enamel from Certain Dental Materials

¹ School of Dentistry, Indiana University, Indianapolis, Indiana

The analysis of over 400 samples of powdered enamel and 2,500 spectrophotometric determinations led to the following conclusions:

1. Generally the release of fluoride from the materials occurred relatively fast, the amounts diminishing with time.

2. Certain materials increased the fluoride content in powdered enamel, while fluoride-free materials actually reduced the fluoride in the enamel.

3. The increases in the fluorine content of enamel on exposure to various materials correlated with the previously reported reduction in enamel solubility.