DENTAL CARIES IN THE COTTON EAT(21)

a€” that isthe greater cariogenicity of processed cereals and the unpre-dictability of the cariogenicity of diets on the basis of theircarbohydrate content a€” apply rather universally to caries ithe human.In a review of various saccharides and dental caries studies,Stephan ( '48) discussed several in vitro experiments whichshowed that not all Lactobacillus organisms fermented lactoseunder the given conditions, and that oral microorganismsproduced pH changes more slowly with lactose than otherdisaccharides. Polvsaccharides were much more inert. Ac-Figure 2 Figure 3Fig. 2 Mandibular teeth of a cotton rat fed a synthetic diet containing 4%liver extract powder.Fig. 3 Mandibular teeth of a cotton rat fed a low mineral oatmeal dietwithout liver extract. Note softness of outer cusp, which permit