对改良MGA功能矫治器线性矫治数据的评价

The evaluation of improved mandibular growth advance(IMGA) with Pancherz analysis

目的:评价改良MGA功能性矫治器对青少年安氏Ⅱ1错下颌功能性后缩、低面角硬组织矢状方向的矫治疗效。方法:以Pancherz分析方法,对12例患者矫治前后头颅定位侧位片重叠后硬组织变化的线形数据进行统计学分析对比。结果:就矢状基准平面OLp而言,pg/OLp,mi/OLp,ii/OLp,co/OLp+pg/OLp,is/OLp-ii/OLp,ms/OLp-mi/OLp,is/OLp-ss/OLp(P<0.01);is/OLp,ii/OLp-pg/OLp(P<0.05),其变化具有统计学意义。ss/OLp,co/OLp,ms/OLp,ms/OLp-ss/OLp,mi/OLp-pg/OLp的变化无统计学意义。结论:采用IMGA矫治器对青少年安氏Ⅱ1错下颌后缩低面角患者进行矢状矫治可产生明显的硬组织变化。

Objective：To evaluate the linearity change of hard tissue of the juvenile of Class II division 1 with mandible functional retrusion by IMGA. Methods： The pre- and post- treatment cephalometric of 12 juvenile patients with IMGA were analyzed in Pancherz analysis to compare the dental position and the skeletal change. Restilts： After treatment, as far as OLp plane, the statistical changes were significance by pg/OLp, mi/OLp,ii/OLp, co/OLp ＋ pg/OLp,is/OLp -ii/OLp, ms/OLp -mi/OLp, is/OLp-ss/OLp （ P 〈 0. 01 ） and is/OLp, ii/OLp-pg/OLp （P 〈0.05 ）,respectively. The statistical changes were not significance by ss/OLp,co/OLp, ms/OLp, ms/OLp - ss/OLp, mi/OLp -pg/OLp（P 〉0.05 ）, respectively. Conclusion： The IMGA is effective on the treatment of the juvenile patients of Class Ⅱ division 1 with mandible retrusion of facial hypodivergency.