Microhardness of molar teeth in cattle with fluorosis.

Cattle were fed forage containing fluoride at a yearly average of 40 mg of fluoride/kg of forage for 5 or 6 years from the time they were 4 months of age. A significant (P < 0.05) negative correlation was observed between the average microhardness of the 3rd premolar and 3rd molar enamel and the fluorosis score of the 2nd incisor.

Influence of cadmium on caries and the cariostatic properties of fluoride in rats.

Cadmium injections during molar tooth development in the rat were strongly caries-promoting in female rats. Cadmium also partially negated the cariostatic effect of fluoridated drinking water in both male and female rats. The mechanism for the caries-promoting properties of cadmium is unknown, but may be related to cadmium uptake into enamel and dentin.

Cariostasis by moderate doses of selenium in the rat model.

The purpose of this study was to measure the effect of dietary selenium present during tooth development on dental caries. Ten-day pregnant rats received either distilled drinking water or water containing 0.8 ppm or 2.