Effect of Natural Fluoride Concentration of Human Tooth Enamel on Fluoride Uptake In Vitro

Abstract
Duplicate enamel blocks were cut from teeth of various age groups from areas differing in water fluoride. One enamel block received a fluoride treatment and the other served as control. Analysis of thin enamel layers revealed that ftuoride uptake was inversely proportional to the natural F- concentration and, in a lesser degree, to the age of the enamel.