一、材料与方法选取恒牙早期功能性近中错始患者9男9女（11．5～13．4岁）及、远中错患者8男Ic女（1．8－13．5岁）及正常对照组8男Ic女（11．9-14．2岁）。近中错殆组为磨牙近中关系，前牙反始仅可退至对对关系。远中错始组为磨牙远中关系，面型表现为轻度B类面型。错始组经闭 First, the material and methods selected permanent early functional near-misclassification patients 9 male and 9 female (11.5 ~ 13.4 years) and, far and wrong patients 8 male Ic female (1.8-13.5 years old) And normal control group 8 male Ic female (11.9-14.2 years old). Near and middle bad group for the molar near the relationship between the anterior teeth can only be back to the opposite relationship. Far from the wrong group for molars distal relationship, the surface showed a mild type B surface type. The wrong group by the closure