Nance托与横腭杆联合支抗正畸治疗的疗效分析

The efficacy analysis of orthodontic treatment with the reinforced anchorage of Nance arch combined with TPA

目的:探讨安氏Ⅱ类一分类伴双颌前突的拔牙矫治病例,采用Nance托与横腭杆联合增强口内支抗的疗效分析。方法:收集2009年7月至2012年7月新疆医科大学第二附属医院口腔正畸科接受诊疗的安氏Ⅱ类一分类伴双颌前突的患者45例,男性18例,女性27例,均进行拔牙矫治。拔牙后Nance托与横腭杆联合增强口内支抗行直丝弓矫治,对治疗前后患者的面部软组织侧貌和硬组织进行头影测量的对比分析。结果:①支抗磨牙在矢状方向上,U1A-RL和U1E-RL分别减少了2.61mm和5.67mm,(t=11.30,P<0.001;t=18.90,P<0.001);U1-NA减小15.06°,A-RL减小了1.36 mm,(t=2.73,P<0.005;t=2.125,P<0.05)差异具有统计学意义。②硬组织U1-SN、U1-NA、L1-NB分别减小了13.14°、12.26°、10.82°,(t=3.30,P<0.002;t=2.76,P<0.002;t=2.72,P<0.001);U1-L1增大了29.73°,(t=3.29,P<0.002)差异有统计学意义。③软组织Cm-Sn-Ls和Ls-FH在矫治后分别增大了8.12°和4.03°,(t=9.14,P<0.001;t=6.72,P<0.001)差异有统计学意义。结论:加强颌内支抗和正确的正畸治疗设计可达到理想的矫治效果,可操作性强,在临床上值得推广。

Objectlve：To explore effects on reinforced anchorage with TPA combined Nance arch in the patients with class II division one. Methods ：45 patients were collected included into the research fr^m orthodontic department of The Sec- ond Affiliated Hospital In Xinjiang Medical University from July in 2009 to July in 2012 ,male 18 ,female 27. The inclusion cri- teria was follows： sample ClasslI with doub!e-jaw protrusion including the premolars extractian and straigth-arch wire tech- nique. All finished cases were analyzed by Cephalomemc comparison to evaluate the auchorage effects and face profile. Re- sult：（~） Anchorage molar change in the sagittal direction,the Ui A-RL and U1E-RL decreased by 2.61 mm and 5.67 mm（ t = ll.30,P 〈0.001 ;t = 18.90,P 〈0.001） ;A-RL decreased by 1.36 mm,（t =-2. 125,P〈0.05）, and the difference was statis- tically significant. （~ Hard tissue ：UI -SN ,UI-NA,L1-NB decreased respectively by 13.14~, 15.06~, and 10.82~, （ t = 3.30, P 〈 0.002; t = 2.73, P 〈 0. 005 ; t = 2.72, P 〈 0. 001 ）, U I-L1 increased by 29.73%, （ t = 3.29, P 〈 0.002 ）, the difference was statistically significant. （3）soft tissue：Cm-Sn-Ls and L^-FH increased by 8.12%and 4.03%, （t =9.14,P 〈0. 001 ;t =6.72 ,P 〈 0. 001 ） ,the difference was statistically significant. Conclusion：Strengthen anchorage with TPA combined Nance arch is de- sired method of controlling anchorage in orthedontic treatment,and the techtriqne was worthy promoting.