横腭弓-Nance弓联合支抗与口外弓增强磨牙支抗的比较

A comparative study of TPA-Nance combined anchorage and face bow in reinforcing the maxillary first molar anchorage

目的:比较研究横腭弓-Nance弓联合支抗与口外弓支抗对支抗磨牙的控制效果。方法:选择20例安氏Ⅱ类1分类上颌前突的患者,随机分为2组,分别使用横腭弓-Nance弓联合支抗和口外弓增强上颌磨牙的支抗,通过治疗前后X线头影测量分析,比较二者对磨牙的支抗控制效果。结果:联合支抗组磨牙平均前移1.87mm,切牙内收4.89mm;口外弓组磨牙平均前移1.34mm,切牙内收5.04mm,2组间差异无显著性(P>0.05)。结论:联合支抗可提供与传统口外弓强支抗同样强度的支抗作用,且制作简单,效果满意,患者易于接受。

Objective： To compare the anchorage effeets in reinforcing the upper first molar anchorage with TPA-Nanee combined anchorage or with face bow. Methods：The sample included 20 patients with Class Ⅱ maloccusion, which were divided into two groups. Combined anchorage and face bow were used respectively to reinforee the upper first molar anchorage. Cephalometric analysis was performed to evaluate the anchorage effects. Results： In the combined anchorage group, the upper first molar moved 1.87 mm mesially and the upper incisors moved 4.89 mm palatelly, while in the face bow group, the upper first molar moved 1.34 mm mesiallv and the upper incisors moved 5.04 mm palatelly. There were no statistically significant differences in two groups （ P 〉 0.05 ）, Conclusions ： Combined anchorage can provide maxinmm anchorage compared with traditional face bow and was acceppted easily by patients.