Aas I H
Acta Odontol Scand. 1983 Oct;41(5):257-64. doi: 10.3109/00016358309162332.
A study of morphologic variability was made for maxillary incisor lingual fossa depth. The problem of variability is discussed, and new methods for the statistical treatment of variability are presented. Possibly, the best procedure to express biologic variability is to present SDs, CVs, Xs, ranges, RCs, and the logarithmic graphic method of the relationship between CV and X. No sex differences in variability could be demonstrated. Maxillary centrals and laterals in the Eskimo were found to have relatively equal variability. This is seen in connection with the great functional demand on Eskimo incisors, giving less reduction of the laterals, a possible simultaneous commencement of calcification for I1sup and I2sup, and possible genetic drift. Comparison of variability for six populations shows no racial differences in variability. Variability is not found to increase with inbreeding. Population comparisons do not confirm little reduction in the Eskimo to be associated with high variability. Genetic drift might be the explanation of the homogeneity of maxillary incisor lingual fossa depth in East Greenland Eskimos.
对上颌切牙舌窝深度的形态变异进行了一项研究。讨论了变异问题，并提出了统计处理变异的新方法。表达生物变异的最佳方法可能是呈现标准差（SDs）、变异系数（CVs）、均值（Xs）、范围、极差系数（RCs）以及变异系数与均值关系的对数图形法。未发现变异存在性别差异。发现爱斯基摩人的上颌中切牙和侧切牙具有相对相等的变异。这与爱斯基摩人切牙的巨大功能需求有关，侧切牙减少较少，I1和I2可能同时开始钙化，以及可能的基因漂变。六个群体变异的比较未显示出变异存在种族差异。未发现变异随近亲繁殖而增加。群体比较未证实爱斯基摩人减少较少与高变异有关。基因漂变可能是东格陵兰爱斯基摩人上颌切牙舌窝深度同质性的解释。
