壱岐島民の歯列弓および口蓋の形態に関する研究
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概要
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An anthropological study of the oral cavity in various areas of Japan and neighboring countries has been conducted to clarify racial lineage. The aim of this study is to clarify the oral traits of Iki population. Plaster models were taken from 108 males and 111 females from 15 to 17 in age, and were measured. Each measurement of dental arches and palates of the Iki population was compared between males and females. And each measurement of the Iki population was also compared with that of Japanese (Ishigakijima, Okinawa, Tanegashima, Goto, Kitakyushu population), Taiwanese, Taiwan Aboriginals (Ami, Bunun, Paiwan, Rukai tribes) and Central American Indian Jicaques. Dental arch lengths of the Iki were significantly greater in the males than in the females. The dental arch lengths were greater in the Iki than in the Taiwan Aboriginals or the Jicaques. Dental arch breadths of the Iki were significantly greater in the males than in the females. The dental arch breadths between upper canines were greater in the Iki than in the other Japanese, the Taiwanese or the Taiwan Aboriginals. But they were smaller in the Iki than in the Taiwanese or the Taiwan Aboriginals in lower posterior dental arch breadth. They were smaller in the Iki than in the Jicaques at all regions. Lengths of dental arch of the Iki were significantly greater in the males than in the females. The lengths of dental arch were similar to the other Japanese, the Taiwanese and the Jicaques. The lengths of dental arch at left first molar were greater in the Iki than in the Taiwan Aboriginals. Palatal heights and length of sutura palatina mediana of the Iki were not significantly different between males and females. The palatal heights were smaller in the Iki than in the other Japanese or the Taiwan Aboriginals. The posterior palatal heigths were greater in the Iki than in the Taiwanese. The length of sutura palatina mediana were shorter in the Iki than in the Okinawa or the Goto. They were longer in the Iki than in the Bunun, the Paiwan or the Rukai. Palatal arch lengths of the Iki were significantly greater in the males than in the females. The palatal arch lengths were smaller in the Iki than in the Taiwanese, the Paiwan, the Rukai or the Jicaques. They were greater in the Iki than in the Ami. Palatal breadths of the Iki were significantly greater in the males than in the females. The palatal breadths were smaller in the Iki than in the Taiwanese or the Jicaques. They were smaller in the Iki than in the Taiwan Aboriginals except between canines. Mandibular alveolar breadths of the Iki were significantly greater in the males than in the females. The mandibular alveolar breadths were smaller in the Iki than in the Taiwan Aboriginals or the Jicaques. These findings and the results of cluster analysis and neighbor-joining method suggest that oral traits of the Iki population differ from those of the Taiwan Aboriginals and the Jicaques, and are similar to the other Japanese and the Taiwanese, especially in the Goto population.
- 1996-08-25