The Relative Incidence of Caries in Upper and Lower Molar Teeth of Albino Rats (Rattus Norvegicus)

Abstract
Heredity is an important factor in dental caries in rats. Hunt and Hoppert have produced 2 strains of rats, one of which is extremely susceptible to dental caries in lower molar teeth and the other is very resistant. The upper molar teeth of these susceptible and resistant rats have a lower incidence of caries than the lower molars of the same animals.