多曲方丝弓联合直丝弓矫治器矫治骨性安氏Ⅲ类错

Application of multi-loop edgewise arch wire in straight wire arch technique for skeletal class Ⅲ malocclusion

目的探讨多曲方丝弓联合直丝弓矫治器矫治骨性安氏Ⅲ类错牙合的临床效果。方法恒牙期骨性安氏Ⅲ类错牙合9例,采用多曲方丝弓技术联合直丝弓矫治器矫治,矫治至前牙反牙合解除,尖牙磨牙为中性关系,治疗前、后拍摄头颅侧位定位片,进行X线头影测量分析,治疗前、后取模,并进行模型分析。结果矫治后UI-LI、FH-MP、OP-MP、FMIA、OB、OJ、OP-MP、UL-SnPg距LL-SnPg距二者差值较矫治前增大(P<0.01),LI-NB、IMPA、LI-MP、较矫治前减少(P<0.01);矫治前、后FMA、APDI、PG-NB、Yaxis、ODI、SNA、SNB比较差异无统计学意义(P>0.05);颌骨基本无变化。结论在直丝弓矫治器中使用多曲方丝弓技术矫治骨性安氏Ⅲ类错牙合效果明显。

Objective To explore the effect of multiqoop edgewise arch wire technique on skeletal class Ⅲ malocclusion. Methods Nine patients with skeletal class Ⅲ malocclusion in permanent dentition received multi-loop edgewise arch wire in straight wire arch technique. Anterior crossbite was resolved, and class I molar and canine relationship was established. Cephalometric X-ray film was taken and studied before and after treatment. The model was established and analyzed before and after the treatment. Results UI-LI,FH-MP, OP-MP, FMIA, OB, OJ, OP-MP and the distance between the UL-SnPg＇ and LL-SnPg＇ increased, and LI-NB, IMPA and LI-MP decreased after treatment in comparison with those before treatment （P〈0.01）. There were no significant differences in FMA, APDI, PG-NB, Yaxis, ODI, SNA and SNB after treatment compared with those before treatment （P〉0.05）. No obvious change occurred on jaws. Conclusions Multi-loop edgewise arch wire combined with straight wire arch technique is an effective method for skeletal class m malocclusion.