目的 :研究上前牙内收过程中转矩控制与移动方式、内收与牙槽骨改建之间的关系。方法 :选取111例拔牙患者治疗前、后的头颅侧位片,7例拔牙患者关闭间隙前、后的锥形束CT(CBCT),测量上前牙唇倾度,切缘、根尖水平和垂直向位移及牙槽骨厚度变化,采用SAS 8.02软件包分别对各测量项目进行t检验和χ~2检验。结果:上前牙控根内收者,唇倾度改变量小,切缘舌侧位移量小,根尖舌侧位移量大,内收后根尖牙槽骨总厚度减少,牙长度减少(P<0.05);牙槽骨改建量少于牙移动量,成人与青少年无显著差异。结论 :上前牙内收过程中,更多的转矩控制会引起较多的整体移动和部分控根的倾斜移动,以及较高的牙根吸收率。舌侧牙槽骨适应性改建量较小,过度舌侧移动会超过其改建能力,引起牙槽骨、牙体损伤。 Objective: To study the relationship between torque control and movement, adduction and alveolar remodeling in adduction of the upper anterior teeth. Methods: Conical beam CT (CBCT) before and after the treatment of 111 cases of tooth extraction were collected before and after craniocerebral calculus, and the extraction rate of incisor lip, Vertical displacement and alveolar bone thickness changes, using SAS 8.02 software package for each measurement items t test and χ ~ 2 test. Results: The maxillary alveolar bone thickness was reduced and the length of the tooth was reduced ( P <0.05). Alveolar remodeling was less than tooth movement, there was no significant difference between adults and adolescents. CONCLUSIONS: More torque control during the adduction of the anterior teeth results in more overall movement and partial root tilt-shift as well as higher root resorption rates. Lingual alveolar bone adaptation smaller, excessive lingual movement will exceed its ability to remodel, causing alveolar bone, tooth damage.