对３４例安氏Ⅱ′错牙合采用Ｂｅｇｇ细丝弓矫治技术，拔４４＋４４（４个第一双尖牙）进行矫正，评价正畸矫正对上唇软组织侧貌的影响。结果，上颌或上牙弓长度较大者，效果较好；而对上颌拥挤不严重，或存在较大鼻唇角者，以及复合错牙合机理者效果欠佳。分析认为，在临床诊断和设计时，应把软组织的形态变化考虑进去，根据不同的错牙合机理及软组织侧貌等具体情况，选择恰当的矫正（拔牙）方案 34 cases of Angle Ⅱ 'malocclusion were treated with Begg thin arch technique, and 44 + 44 (4 first bicuspid canals) were corrected to evaluate the effects of orthodontic correction on the upper lip soft tissue profile. Results, the maxillary or upper arch length greater effect is better; and on the maxillary crowding is not serious, or those who have a larger nasolabial angle, and composite malocclusion mechanism ineffective. Analysis, in the clinical diagnosis and design should take into account the morphological changes of soft tissue, according to the different malocclusion mechanism and soft tissue profile and other specific circumstances, select the appropriate correction (extraction) program