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Greater female communalities in prenatal hand and dental development
(Elsevier, 1974-06)
As shown in 15 male and 17 female developmentally-normal, 6-9 week (15-47 mm crown-rump length) embryos, intercorrelations (communalities) involving both mesial and distal deciduous teeth and proximal and distal segments ...
Negro-Caucasoid differences in permanent tooth emergence at a constant income level
(Elsevier, 1973-05)
Three-thousand, eight-hundred and sixty-eight low-income American Negro boys and girls showed systematic permanent advancement in tooth emergence compared with 5788 low-income boys and girls of European ancestry. Further ...