Kao C T, Chen F M, Lin T Y, Huang T H
Dental Department, Republic of China.
Int J Adult Orthodon Orthognath Surg. 1995;10(4):285-93.
The morphologic study of adults with true Class III malocclusion has seldom been reported. Tracings of lateral cephalograms of 51 Taiwanese adults with true Class III malocclusion were subjected to quadrilateral analysis. Means and standard deviations, t test, correlation analysis, and regressive analysis were used to compare the differences between this group and a reference population of adults with normal occlusion. The results indicated that the maxillary base is shorter and in a more retrusive position in adults with Class III malocclusion. Furthermore, the mandible is in a more protrusive position. The pattern of growth in the Class III malocclusion was found to be horizontal, that is hypodivergent. In diagnosis of the abnormality, the rule of the quadrilateral can provide assistance. That is, the maxillary base length, mandibular base length, anterior lower facial height, and posterior lower facial height can be used to evaluate the abnormality. In postural relationships the sagittal angle, vertical sagittal ratio, and horizontal sagittal ratio can be used as a reference.
关于真性安氏III类错牙合畸形成人的形态学研究鲜有报道。对51名患有真性安氏III类错牙合畸形的台湾成年人的头颅侧位片进行四边形分析。采用均值、标准差、t检验、相关性分析和回归分析来比较该组与正常牙合成年人参照群体之间的差异。结果表明，安氏III类错牙合畸形成年人的上颌骨基部较短且位置更后缩。此外，下颌骨位置更前突。安氏III类错牙合畸形的生长模式为水平型，即低角型。在诊断这种异常情况时，四边形规则可提供帮助。也就是说，上颌骨基部长度、下颌骨基部长度、下前部面高和下后部面高可用于评估异常情况。在姿势关系方面，矢状角、垂直矢状比和水平矢状比可作为参考。
