Tin and fluoride uptake in human enamel in situ: electron probe and chemical microanalysis

Abstract

When the electron probe was used to scan the intact enamel surfaces of teeth topically treated with stannous fluoride, it was concluded that tin concentration occurring in circumscribed trapping regions (about 125 μ diameter and 20 μ deep) is about 20,000 ppm. By chemical microanalysis, it was found that fluoride concentration increases by about 20 percent in treated enamel. When the electron probe was used to scan the intact enamel surfaces of teeth topically treated with stannous fluoride, it was concluded that tin concentration occurring in circumscribed trapping regions (about 125 μ diameter and 20 μ deep) is about 20,000 ppm. By chemical microanalysis, it was found that fluoride concentration increases by about 20 percent in treated enamel.