n. the effects of high fluoride intake. Dental fluorosis is characterized by mottled enamel, which is opaque and may be stained. Its incidence increases when the level of fluoride in the water supply is above 2 parts per million. The mottled enamel is resistant to dental caries. When the level is over 8 parts per million, systemic fluorosis may occur, with calcification of ligaments.
Subjects: Medicine and Health — Ecology and Conservation.