The Dentition as a Criterion of Race with Special Reference to the Aleut

Abstract

Morphologic and linguistic differences found in the aleuts are supported by dental study of this group. Torus mandibularis was present in 61% of eastern Aleuts (living East of Atka) against 26% in western Aleuts (living in Atka and formerly Attu). C.R. 3.4. Mandibular prognathism occurred only in the Eastern populace (13%, C.R.2.2). In part due to small numbers, the numerous other differences are not statistically valid. Available data suggest strongly that torus mandibularis depends on genetic rather than functional factors for its presence. The incidence of mandibular prognathism is dependent on a single recessive gene in this populace. Mesio-disto tooth diameters can be used as one example illustrating variations within the Mongoloid race. Variations of primary racial features of the dentition within sub-races should be studied attentively since pure Mongoloids, for instance, do not exist. The ultimate value of the dentition as a criterion of race will depend on the outcome of detailed studies in populations of known racial origin.