2009009

COM.on C.A.3:e9/77-84 Online published on Aug.7, 2009.

REPORT
Dental Traits in Five Chinese Minorities in Yunnan Province

KANAZAWA Eisaku¹, SATAKE Takashi¹, SASAKI Kayoko¹, MATSUNO Masanobu¹, IGARASHI Yuriko¹, NAKAYAMA Mitsuko¹, Roshan PEIRIS², TAKAHASHI Masami³, ITO Yasushi¹, ITO Kanae¹, GUO Dalie⁴, JI Xueping⁵, MA Jing⁶

1. Department of Anatomy and Physical Anthropology, Nihon University School of Dentistry at Matsudo, Matsudo 271-8785 Japan; 2. Department of Anatomy, School of Dentistry, University of Peradeniya, Peradeniya 20400 Sri Lanka; 3. Department of Anatomy, School of Dentistry, Health Sciences University of Hokkaido, Ishikari, Hokkaido 061-0293 Japan; 4. Yunnan Nationality Association, Lijiang 674100 China; 5. Department of Palaeobiology, Yunnan Institute of Cultural Relics and Archaeology, Kunming 650118 China; 6. Department of Anthropology, Yunnan University, Kunming 650031 China

Chinese translator: LU Yan, MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433 China

ABSTRACT: Metric and non-metric characters in Chinese minorities have not been fully studied. In this paper, we described the tooth sizes and the frequencies of these characters among five minorities in Yunnan Province, Dai, Hani, Naxi, Pumi, and Miao, and searched for their affinity to the populations in the neighboring areas. Dental impressions of young adults in these five minorities were taken from 2000 to 2007. Mesiodistal and buccolingual diameters of all teeth were measured, and frequencies of 17 dental traits were recorded based on the method of Arizona State University Dental Anthropology System. The results were compared with the previously reported dental anthropological data of the East Asian populations. Metric study revealed that average tooth size of Miao was smallest among the five minorities. A principal coordinate analysis based on Smith’s Mean Measure of Divergence using the frequencies of 17 traits suggested that the five minorities were closely related as a single group and belonged to the Sundadont dentition category, but positioned close to the Sinodont groups. Although anthropological and linguistic studies suggest that the Hani, Naxi, and Pumi are closely related to the Tibetans and that the Dai and Miao have close affinity to Southeast Asians, it was difficult to separate these five minorities into two groups. The position of these minorities in the Mean Measure of Divergence plot suggested that they were originally derived from South Asia or Tibet, but probably affected by other Sinodont tribes such as the Han in their vicinity.

Key words: Dental anthropology; Chinese minorities; Yunnan Province; Non-metric traits

Recieved: Jul.3, 2009 Accepted: Jul. 14,2009 Corresponding: kanazawa.eisaku@nihon-u.ac.jp

Full text: [PDF]
　

Tab.3 Sample sizes and dental trait frequencies (%) in Chinese minorities and other East Asians [XLS]

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