种植支抗治疗露龈笑过程中切牙牙根吸收的CBCT检测  

Measurement of incisor root resorption by CBCT in treatment of gummy smile using implant anchorage

作　　者：吴碧蓉[1] 骆英[1] 王晖[1] 

机构地区：[1]杭州口腔医院正畸科,浙江杭州310006

出　　处：《口腔医学》2014年第7期517-519,共3页Stomatology

摘　　要：目的通过CBCT技术精确测量种植支抗治疗露龈笑过程中所导致的上颌切牙牙根吸收的情况。方法 11例患者全部采用直丝弓矫治技术,在上颌两侧侧切牙和中切牙之间的牙槽骨上,各植入1枚微螺钉,每侧约0.98 N压低上前牙。当龈缘距与微笑线基本平齐时,治疗停止,进入保持阶段。治疗前后拍摄CBCT,在矢状位图像选取牙根长度最长的轴面进行长度测量。结果所有患者露龈笑均有明显改善,平均减小(2.47±0.64)mm,切牙压入量为(2.81±0.62)mm。CBCT显示,治疗前后切牙牙根有一定程度的吸收,其中中切牙的吸收量大于侧切牙,但没有统计学意义。结论采用种植支抗治疗露龈笑会导致上颌切牙出现牙根吸收,CBCT能够定量测量根吸收的情况。Objective To measurethe incisor root resorptionquantitatively by CBCT in the treatment of gummy smile by using implant anchorage. Methods The straight wire appliance technology was used for 11 cases. Mini - screw implants were inserted between the central and lateral incisors. 100 g force was used for the intrusion of incisors. Treatment stopped and maintainence began when the gingival margin flushed with smile line. CBCT images of all patients were taken immediately before and after intrusion. The measurement of the root length was from the longest axis on the saggital plane. Results Significant improvement of gummy smile was found in all cases, and the average decrease was （2.47 ± 0.64） mm. The intrusion of incisors was （2.81± 0.62 ） mm. CBCT showed that the resorption was more in central incisors than that in lateral incisors. Conclusions Root resorption occurred in the treatment of gummy smile by using implant anchorage,and CBCT can measure root resorption quantitatively.

关 键 词：种植支抗 露龈笑 根吸收 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]