Rat Molar Morphology and Dental Caries

Using an optical comparator and standardized sections, morphological and caries comparisons were made of the molars of rats which had been subjected to sugar injections during tooth formation. This treatment did not modify tooth morphology. Narrower deeper fissures tended to decay more frequently, the extent of caries was greater in such fissures, and not directly related to enamel thickness. Morphological differences between litters were significant.