Abstract
The formation of mandibular third molars, relative to the developmental sequence of second molars, was similar in Caucasoid children of Australian, New Zealand and North American stock. Pre-Caucasoid and living Australian Aborigines were alike also in their pattern of molar development. However, when Australian Aborigines and Caucasoids were compared, differences were found in the timing of third molar formation between these two races of man. These differences comprised a marked retardation in the development of third molars in Caucasoids amounting to approximately 4.3 years, as well as a greater variability in the attainment of all stages of third molar maturation. On the other hand, the development of permanent first molars, relative to second molars, was similar in Caucasoids and Australian Aborigines.
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