前牙反是临床常见的错畸形,对口腔功能,颜面的发育,美观等危害较大,故深入分析形成反(牙合)畸形的因素机制对预防和矫治具有重要意义。临床资料 1987年～1990年门诊反病人105名,年 Anterior crossbite is a common clinical malformation deformity, the oral function, facial development, beauty and other more harmful, so in-depth analysis of the formation of anti (occlusal) deformity factor mechanism for the prevention and correction of great significance. Clinical data 1987 ~ 1990 outpatient anti-tuberculosis patients 105, year