Reactions of Powdered Human Enamel and Fluoride Solutions with and without Intermediate CaHPO4 • 2H20 Formation

Abstract
Powdered human enamel treated for three minutes each with a CaHPO4·2H2O forming solution and a fluoride solution, and then suspended in "synthetic saliva" for 72 hours acquired a large amount of apatitic fluoride. This apatitic fluoride appears to form after the fluoride treatment.