The enlargement and absence of CMS are related to various malformations of central neural system, especially in the abnormalities of posterior fossa. CMS增大和消失与多种胎儿中枢神经系统畸形有关,尤其是后颅窝畸形。
The interval between the central fossa of the first molar and the extension line of the premolar buccal cusp at the end of the second stage and overall therapy in two groups were measured and compared. 在矫治第2期末即精细调整前和固定矫治结束时测量第一磨牙中央窝与前磨牙颊尖延长线的距离并进行比较。