Fluoride content of dental hard tissues with special respect to fluoridation of domestic salt.

Teeth from children with various histories of fluoride supplementation were collected and analysed for fluoride. Fluoride concentrations in dentine from the canton of Vaud with fluoridated salt at 250 ppm since 1969 were at a level comparable to that reported from regions with 1.0 ppm F- in the drinking water and in children having received fluoride tablets during their tooth formative age.