Solubility and Crystallinity in Relation to Fluoride Content of Fluoridated Hydroxyapatites

Abstract

Fluoridated hydroxylapatites were synthesized at 80.degree. C (pH 7.4) to study their crystallinity and solubility in relation to fluoride content. The crystallinity of fluoridated hydroxylapatites increased initially, then decreased and finally increased again with the degree of fluoridation, whereas the decrease in relative solubility of fluoridated hydroxylapatites at 25.degree. C (pH 4.0) was proportional to the log of the fluoride content. [The relevance of this study to surface tooth enamel formation was discussed.].