Nance弓和横腭杆在拉尖牙远移中支抗效果的研究  

A clinical trail of the anchorage by Nance arch and transpalatal arch in the labioversion canine distal move

作　　者：边翔[1] 杨永进[2] 法永红[2] 沈焕[2] 李志韧[2] 

机构地区：[1]辽宁医学院研究生院,锦州121001 [2]中国人民解放军第二炮兵总医院口腔科

出　　处：《实用口腔医学杂志》2012年第3期354-358,共5页Journal of Practical Stomatology

摘　　要：目的:研究Nance弓和横腭杆在拉尖牙远移过程中,二者在三维方向上磨牙支抗效果的比较。方法:选择Angle I类中度拥挤,或Angle II类I分类软组织侧貌前突不明显者40人,随机分组,上、下颌减数双侧第一前磨牙,设计方案为中度支抗,两步法关闭拔牙间隙。排齐整平后和治疗阶段结束时取模型,拍摄口内像和头颅侧位片。测量各标志点的线距和磨牙角度变化。应用SPSS 17.0统计软件对测量结果行统计学分析。结果:2组在阻止上颌第一恒磨牙近中前移、水平宽度或垂直方向、近中倾斜差异无显著性,但在磨牙旋转的控制上,Nance弓组磨牙向近中舌向旋转3.70°±1.20°,横腭杆组向近中舌向旋转8.50°±3.59°(P<0.05)。结论:在磨牙旋转支抗控制上,Nance弓明显优于横腭杆。Objective： To evaluate the anchorage effects of Nance arch and transpalatal arch（TPA） in the labioversion canines distal move.Methods： Forty patients were recruited and randomly allocated into TPA group and Nance arch group.Enrollment criteria included Class I or Class II devision 1 maloclussion,moderate crowding and extraction of upper and lower first premolars.The canine-distal-movement therapy was completed in all the patients.Lateral cephalograms and study casts were collected before treatment and at the clinical end point.Statistical analysis was performed using software package SPSS 17.0.Results： There was no significant difference between the TPA and Nance arch groups in terms of prevention of mesial drift,stable width,vertical displacement and distal tipping（P0.05）.However,the molar rotation was 8.50°±3.59° in TPA group and 3.70°±1.20° in Nance arch group（P0.05）.Conclusion： Nance arch is more effective in prevention of mesio-palatal rotation in the canine-distal-movement therapy.

关 键 词：横腭杆 NANCE弓 三维方向 尖牙远移 支抗 

分 类 号：R783.5[医药卫生—口腔医学]