Abstract: Ectopic impaction of the functional tooth is a kind of complicated mal-occlusion. Orthodontic eruption of such tooth，in cooperation with surgical assistance，is usually necessary to rebuild aesthetics and function of the natural dentition. Oral surgeons play important roles in the procedure，which needs the capability or knowledge of the general design of the treatment，localization of the impact tooth，analysis and clearance of the obstruction，surgical techniques for the exposure，and healing mechanics of the eruption. Good surgical treatments are essential for the comfort of the patient，duration time of the procedure，and final success of the orthodontic eruption.

Key words: impact tooth, orthodontic eruption, oral surgery

摘要： 智齿以外恒牙阻生是牙列畸形矫治中较为复杂的情况，需通过外科-正畸联合导萌治疗，以恢复完整牙列的美学形态和咬合功能等。牙槽外科医生在这项协同治疗过程中，担负重要职责，在诊断与治疗设计、阻生牙齿定位、外科显露技术、导萌阻力去除、萌出愈合等方面应具备足够的知识或经验，对减少患者手术痛苦，缩短矫治时间，最终矫治成功等有决定性作用。

关键词: 阻生牙, 正畸导萌, 口腔外科