Harris E F, Nweeia M T
Am J Phys Anthropol. 1980 Jul;53(1):133-42. doi: 10.1002/ajpa.1330530118.
The magnitude of fluctuating dental asymmetry is reported for a marginally Westernized, horticultural Indian group, the Ticuna of the Region Amazonas, Colombia. Asymmetry is lower than in other Amerindian and Eskimo groups reported to date, which accords with the adequacy and reliability of traditional food sources and complements the claim that protein intake is at or above minimum requirements. Partitioning the variation by sex, arcade, dimension, and tooth discloses several statistically significant effects. Among these: 1) females are proportionately more asymmetric than males; 2) maxillary teeth are more asymmetric than their mandibular counterparts; 3) the mesiodistal dimension is less canalized than buccolingual width in the maxilla, but is more asymmetric in the mandible; and 4) the pattern of asymmetry corresponds closely with the morphogenetic gradients within each tooth field, suggesting that bilaterality provides an additional measure for disclosing underlying genetic and ontogenetic patterns in the dentition.
报告了哥伦比亚亚马孙地区边缘西方化的园艺印第安群体提库纳人的牙齿波动不对称程度。不对称程度低于迄今为止报道的其他美洲印第安人和爱斯基摩人群体，这与传统食物来源的充足性和可靠性相符，并补充了蛋白质摄入量达到或高于最低要求的说法。按性别、牙弓、维度和牙齿对变异进行划分，揭示了几个具有统计学意义的影响。其中包括：1）女性比男性的不对称程度相对更高；2）上颌牙齿比下颌牙齿更不对称；3）在上颌中，近远中维度的发育比颊舌宽度更不稳定，但在下颌中更不对称；4）不对称模式与每个牙区的形态发生梯度密切对应，这表明双侧性为揭示牙列中潜在的遗传和个体发育模式提供了一种额外的手段。
