“Studies of skulls and jaw fragments indicate a very low prevalence of dental caries in ancient man. The little caries that did occur appears to be related to attrition resulting from the type of diet.”

Dr. Finn (same source as above) wrote …

“It has been established by many investigators that the dental caries prevalence rates among modern primitives resemble to a great extent those of early man. In general, the teeth are resistant to decay or decay occurs only after excessive wear. Dental caries is, therefore, a disease affecting the mature or elderly person. As in most mouths with little caries, the prevalence of decay is confined almost without exception to the posterior teeth where it involves either pits or fissures, worn occlusal or proximal surfaces or cervical areas exposed by recession of the gingival tissue.”