微螺钉种植支抗关闭拔牙间隙后软硬组织的变化  

Soft-and hard-tissue changes after extraction space closure with micro-screw implant

作　　者：刘晶[1] 刘月华[1] 李强[1] 

机构地区：[1]同济大学口腔医学院正畸科,上海200072

出　　处：《复旦学报（医学版）》2009年第4期398-402,共5页Fudan University Journal of Medical Sciences

基　　金：上海市卫生局科研课题项目(054088)

摘　　要：目的研究以微螺钉为支抗,用直丝弓矫治器滑动法关闭拔牙间隙后的软硬组织变化。方法20例拔除4个第一前磨牙的正畸患者,使用微螺钉种植支抗结合滑动直丝弓技术关闭拔牙间隙,对矫治前后的X线头颅定位侧位片进行测量,分析软硬组织的变化。结果上颌切牙切缘平均腭向移动7.15mm,压低1.63mm。上颌第一磨牙近中接触点平均远移0.80mm,压低1.80mm。下颌切牙切缘平均后移4.65mm,伸长0.48mm。下颌磨牙近中接触点平均近中移动0.18mm,伸长1.18mm。A点、B点后移。上唇突点、下唇突点后移。结论微螺钉在关闭拔牙间隙过程中能发挥强大的支抗作用,明显改善侧貌,对上颌骨也有一定的骨改建作用。Objective To investigate the changes of soft closure with micro screw implant as orthodontic anchorage. and hard tissues after extraction space Methods Twenty cases were selected randomly with the first premolars extraction. Micro screw implant was used as orthodontic anchorage. Sliding technique was used to close the extraction space. The lateral cephalograms before and after the treatment were evaluated. Results The upper incisors moved 7. 15 mm palatelly, 1. 63 mm intruded. The upper first molar moved 0. 80 mm distally, 1. 80 mm intruded. The lower incisors moved 4.65 mm distally, 0.48 mm extruded. The lower first molar moved 0. 18 mm mesially, 1.18 mm extruded. A point, B point, upper lip, lower lip showed distal movement. Conclusions Microscrew implant can provide acceptable and reliable anchorage in the process of extraction space closure, and improve the profile, Besides, it produces skeletal change on the maxilla.

关 键 词：微螺钉 支抗 拔牙间隙 软硬组织 

分 类 号：R783.5[医药卫生—口腔医学]