抄録
Tooth crown traits of 19 members of the Manchu tribe of Xin-Bin, China, were examined and compared with those of 7 Northeast Asia populations in order to clarify the anthropological position of the Manchu tribe based on Turner's Mongoloid dental variation theory. Plaster models were taken from 104 male and 109 female students, 14 to 18 years of age, of the Manchu tribe middle high school in Xin-Bin. They were examined using the Arizona State University Dental Anthropology System. In the eight traits, considerable differences were shown between Sinodonty which is typical of Northeast Asia and Sundadonty which is typical of Southeast Asia. Winging (UI1^2) and 4-cusp (LM2) of Manchu were similar to those of Sundadonty. Shoveling (UI1), Double shoveling (UI1), Carabelli's trait (UM1), Deflecting wrinkle (LM1) and Y-groove pattern (LM2) of Manchu were similar to those of Sinodonty. Cusp 5 (UM1) of Manchu lie midway between Sinodonty and Sundadonty. Appearance rate of Double shoveling (UI1), Lingual cusp variation (LP2), Protostylid (LM1) and 4-cusp (LM2) were high in 7 Northeast Asia populations. Canine medial ridge (UC), Hypocone (UM2), Cusp5 (UM1), Carabelli's trait (UM1), Deflecting wrinkle (LM1), Distal trigonid crest (LM1) and Cusp7 (LM1) were middle, Winging (UI1^2), Shovelling (UI1), Interruption groove (UI2), Tuberculum dentale (UI2), Canine distal accessory ridge (UC), Odontome (UP, LP), Cusp6 (LM1) and Y-groove pattern (LM2) were low. In the eight traits, considerable differences were shown between Han trib and Manchu tribe. Double shoveling (UI1), Lingual cusp variation (LP2), Cusp 5 (UM1), Carabelli's trait (UM1), Protostylid (LM1) and 4-cusp (LM2) of Manchu were higher those of than Han. Tuberculum dentale (UI2) and Canine distal accessory ridge (UC) of Manchu were lower than those of Han.
