Reaction of Acidulated Phosphate-Fluoride Solutions with Human Apatite

Abstract

Finely pulverized human enamel was reacted with acidulated phosphate-fluoride solutions. The products were analyzed for fluoride content and examined by X-ray difjraction and infrared absorption. Fluoride content of the products and the amount of calcium fluoride formed increased with increasing reaction time, temperature, or both. Misleading results may be obtained if they are based only on fluoride uptake analyses.