Relation of arsenic supplements to dental caries and the periodontal syndrome in experimental rodents

Dietary arsenic supplements were fed to caries-susceptible rats after the molar crowns were mineralized almost completely, during the mineralization of the crowns, or throughout and after development. No influence on caries activity was observed. Dietary supplements of arsenic to weanling rice rats tended to cause small increases in the severity of the periodontal syndrome.

Comparative effects of a purified diet and a natural food stock ration on he occurrence of periodontal lesions in thyrotoxic rats

Thyrotoxic rats developed severe periodontal disease after a few weeks on a purified diet containing all known nutrients. Lesions did not occur in thyrotoxic rats fed a natural food stock ration nor the purified diet with dietary supplements.