大分県耶馬渓住民の歯の形質人類学的研究

Abstract

In order to clarify an anthropological position of the Japanese of Yabakei based on Mongoloid dental variations, 6 tooth crown traits of the Japanese of Yabakei were examined and compared with 6 East Asia populations. In the six traits which show considerable difference between Sinodonty and Sundadonty, Double shoveling and 4-cusp in Yabakei were similar to those of Sinodonty, and Shoveling and Y-groove pattern were similar to those of Sundadonty. Carabelli's trait and Deflecting wrinkle lay between Sinodonty and Sundadonty. From a cluster analysis and multidimensional scaling analysis among 7 East Asian populations, the Yabakei was the nearest to the Chaoxian. Double shoveling and 4-cusp were approximate to those of Sinodonty than those of Taiwan. Shoveling and Y-groove pattern were approximate to those of Sundadonty than those of Taiwan. Carabelli's trait and deflecting wrinkle were most closely related to those of Taiwan. But the Yabakei was the closest to the Chaoxian.