Pullinger A G, Liu S P, Low G, Tay D
J Oral Rehabil. 1987 May;14(3):291-9. doi: 10.1111/j.1365-2842.1987.tb00721.x.
According to linear interincisal measurements, women have a smaller maximum jaw opening than men. In this study the difference was 2.7%. In contrast, epidemiological surveys indicate that women have a greater mobility of joints and generally more joint laxity. Covariate analysis was used to test for the difference between sexes in mean maximum passive opening adjusted according to group mean differences in other parameters of body size. The net result was that the values became more equal between sexes. A second method, employing a geometric estimation for the angle of maximum jaw opening, showed that women had a 5.4% wider range of jaw opening than men (P less than 0.057). This method avoided the problem of considering relative body size and body factors which generally correlated poorly with maximum opening. It should be noted that an increased range of opening is a measure of hyperextensibility and does not necessarily imply laxity or instability.
根据切牙间线性测量，女性的最大张口度比男性小。在本研究中，差异为2.7%。相比之下，流行病学调查表明，女性关节活动度更大，关节松弛更为普遍。采用协变量分析来检验根据其他身体尺寸参数的组均值差异调整后的平均最大被动张口度的性别差异。最终结果是两性之间的值变得更加接近。第二种方法，采用最大张口角度的几何估计，结果显示女性的张口范围比男性宽5.4%（P<0.057）。该方法避免了考虑相对身体大小和通常与最大张口度相关性较差的身体因素的问题。应当指出，张口范围增加是一种过度伸展性的度量，并不一定意味着松弛或不稳定。
