Dental Traits in Five Chinese Minorities in Yunnan Province 

Characteristics of dental morphology in the Xinjiang Uyghurs and correlation with the EDARV370A variant

“…Additionally, the prevalence of some dental characteristics was higher than that in East Asian and European populations, such as maxillary first molar Carabelli's trait and cuspid mesial ridge. The prevalence of Carabelli's trait in Bali, East Malay Archipelago and Chaoxian populations was high (about 50%) [12]. The prevalence of maxillary cuspid mesial ridge in West African, South African and Koisan populations was high [14].…”

“…Dental plaster modeling is an established method for dental morphological observation, and has been used in several previous studies, e.g., Kimura et al [10], Kanazawa et al [12], Park et al [9] and Kamberov et al [8]. We made a dental plaster model for each participant.…”

“…In addition, we conducted principle component analysis (PCA) on the prevalence data of dental morphological characteristics in the Xinjiang Uyghur and Taizhou Han populations together with data published on African, European, and South and East Asian populations [12,14]. Eleven dental morphological characteristics of these populations were used in PCA, including maxillary central incisor shoveling (SUI1), incisor double shoveling (DSUI1), cuspid mesial ridge (CMRUC), Carabelli's trait (CCUM1), first molar cusp 5 (C5UM1), mandible second molar cusp 4 (C4LM2), second molar Y-groove (GPYLM2), first molar cusp 6 (C6LM1), first molar cusp 7 (C7LM1), first molar deflecting wrinkle (DWLM1), and maxillary and mandible first and second odontomes (OU-LP1-2).…”

New Directions in Dental Anthropology

“…For the purpose of comparison with 38 other Asia-Pacific populations, frequencies composed of the number of scales were reduced into dichotomized frequencies. Expression dichotomy was determined differently among 13 traits as shown in Table 1 according to previous studies (Ichikawa et al, 2008;Kanazawa et al, 2009;Manabe et al, 1997). Thus the frequencies for each parameter were expressed as percentages.…”

“…Table 2 shows the dichotomized frequencies of the 13 traits in 39 populations from Asia and the Pacific region, including PNG Wabag Highlanders at the top. Frequencies for the populations other than PNG Highlanders were taken from already published studies (Barksdale, 1972;Ichikawa and Matsuno, 2008;Kanazawa et al, 2009;Chikushi, 2001;Kiyosue, 2000;Jin, 2003;Fukunari, 2003;Kikuti, 2003;Yamagichi, 1996;Manabe et al, 1991;Manabe et al, 1992;Manabe et al, 1997;Turner, 1987).…”