Rukai 族(台湾高山族)の歯列弓および口蓋に関する研究

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Oral traits of Taiwan aborigines have been a subject of interest for anthropology. Little, however, has been reported because of geographical peculiarity. Therefore, a study on the Rukai tribe, a total of 60 subjects, 24 males from 16 to 63 (X^^-=34.2) in age and 36 females from 16 to 66 (X^^-=32.9) in age, was made on the plaster-casts for the purpose of clarifying their dental arch and palatal vault form. The results were as follows : 1. Upper and lower dental arch lengths were not significantly different between males and females. It was recognized that they were almost the same in the Rukai and the Paiwan tribe, they were shorter in the Rukai tribe than in the Okinawa people, the Taiwan males and the Atayal tribe, but longer than in the Ami tribe in both males and females. 2. Upper and lower dental arch breadths were wider in the males than in the females, especially significant differences were shown in upper anterior and posterior dental arch breadths. It was recognized that they were a little wider in the Rukai tribe than in the Paiwan tribe and the Taiwan males, and wider at posterior region in the Okinawa people in both males and females. 3. Lower anterior-posterior dental arch length index was significantly higher in the females than in the males. It was supposed that many of the Rukai tribe, like the Paiwan tribe, had V-form as dental arch form. 4. Lengths of dental arch were similarly in the males and the females. It was recognized that lengths of dental arch were almost the same or a little longer in the Rukai tribe than in the Paiwan tribe, and almost the same at the lower lengths in the Rukai tribe and the Okinawa people in both males and females. 5. Anterior and posterior palatal heights, palatal height indices and length of sutura palatina mediana were not significantly different between males and females. It was recognized that anterior palatal height was lower but posterior was higher in the Rukai tribe than in the Okinawa people, and both heights were almost the same in the Rukai tribe and the Paiwan tribe in both males and females. 6. Palatal arch lengths were longer in the males than in the females, especially significant differences were shown for 1st and 2nd molars. It was recognized that they were a little longer in the Rukai tribe than in the Paiwan tribe in both males and females. 7. Palatal breadths were wider in the males than in the females, especially significant differences were shown for 2nd premolars, 1st and 2nd molars. It was recognized that they were a little wider in the Rukai males than in the Paiwan males, but similarly in the Rukai females and the Paiwan females, and they, except at the region between right and left canines, were wider in the Rukai tribe than in the Okinawa people in both males and females. 8. Mandibular alveolar breadths were wider in the males than in the females, especially significant differences were shown for 1st and 2nd premolars. It was recognized that they were a little wider at anterior but a little narrower at posterior region in the Rukai tribe than in the Paiwan tribe, and wider in the Rukai tribe than in the Okinawa people in both males and females.
九州歯科学会の論文
1984-12-25

著者

西岡信
九州歯科大学口腔衛生学教室

Rukai 族(台湾高山族)の歯列弓および口蓋に関する研究

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