Abstract
Artificial caries in rats resulting from exptl. diets has not previously matched the pattern of normally-appearing caries in humans, appearing typically in the deep fissures of occlusal surfaces in the rats, and not (as in humans) on buccal, lingual, or proximal surfaces. Exptl. basal diet no. 586 (ingredients and directions for prepn. are given in detail) does not contain a coarse particle factor, and sugar content (18%) is low; it is deficient in cereal protein, particularly lysine, and results in a caries-pattern strikingly similar to that of humans. The rats (Holtzman strain) show high variability as to number of animals involved, number of teeth involved, and pattern of development in each tooth.