Ferrario V F, Sforza C, Miani A, Tartaglia G
Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Facoltà di Medicina e Chirurgia, Università degli Studi, Milano, Italy.
Am J Phys Anthropol. 1993 Apr;90(4):445-53. doi: 10.1002/ajpa.1330900405.
Form differences between biological structures can be evaluated using several approaches. When landmark data are available, a recently proposed method (euclidean-distance matrix analysis) seems to be able to differentiate between size and shape differences. This method also localizes those areas which differ most between the two structures. We have applied it to analyze the sexual dimorphism in dental arch form in a sample of 50 men and 45 women. Subjects ranged in age between 20 and 27 years, and had sound dentitions. Fourteen landmarks, corresponding to the centers of gravity (centroids) of the occlusal surfaces of all permanent teeth (right second molar to left second molar), were individualized on the dental casts of subjects. All the possible linear distances between pairs of teeth were computed, thus creating four mean form matrices (one for each arch within sex). Gender differences were tested by using euclidean-distance matrix analysis. No significant differences were demonstrated in the shape of arches, while male arches proved to be slightly bigger than female arches.
生物结构之间的形态差异可以通过几种方法进行评估。当有地标数据可用时，最近提出的一种方法（欧几里得距离矩阵分析）似乎能够区分大小和形状差异。该方法还能定位出两种结构之间差异最大的区域。我们已将其应用于分析50名男性和45名女性样本中牙弓形态的性别二态性。受试者年龄在20至27岁之间，牙列健全。在受试者的石膏模型上确定了14个地标，对应于所有恒牙（右第二磨牙至左第二磨牙）咬合面的重心（质心）。计算了每对牙齿之间所有可能的线性距离，从而创建了四个平均形态矩阵（性别内每个牙弓一个）。使用欧几里得距离矩阵分析测试性别差异。牙弓形状未显示出显著差异，而男性牙弓被证明略大于女性牙弓。
