Kieser J A, Groeneveld H T, Preston C B
Ann Hum Biol. 1986 Sep-Oct;13(5):489-98. doi: 10.1080/03014468600008651.
Fluctuating dental asymmetry was evaluated as an indicator of environmental stress in a group of 202 living Lengua Indians from the Paraguayan Chaco area. Older, less accultured individuals were shown to be significantly more asymmetric than younger individuals who had been increasingly exposed to western foodstuffs and medicine. Lengua Indians demonstrated similar levels of asymmetry to another preliterate group, the Ticuna Indians of Columbia, but were found to be significantly more asymmetric than contemporary caucasoids. Similar patterns of asymmetry in both arcades for males and females were confirmed by analyses of variance and by Spearman's rank-order correlation coefficients. Partitioning variation in the degree of asymmetry by arcade, dimension and tooth revealed significant differences in the effects of tooth and arcade only: asymmetry was greater in the maxilla and greater in the more distal teeth within each morphogenic class.
在一组来自巴拉圭查科地区的202名在世的伦瓜印第安人中，波动牙齿不对称被评估为环境压力的一个指标。结果显示，年长者和文化适应程度较低的个体比那些越来越多地接触西方食品和药物的年轻人明显更不对称。伦瓜印第安人表现出的不对称水平与另一个未开化群体——哥伦比亚的提库纳印第安人相似，但被发现比当代白种人明显更不对称。通过方差分析和斯皮尔曼等级相关系数证实，男性和女性的两个牙弓中都存在类似的不对称模式。按牙弓、维度和牙齿对不对称程度的变异进行划分，结果显示仅在牙齿和牙弓的影响方面存在显著差异：上颌的不对称程度更大，并且在每个形态发生类别中，越靠后的牙齿不对称程度越大。
