Abstract:

Objective    To analyze the principle and evaluate clinical effect of correction on skeletal mandibular deviation by multiloop edgewise arch wire （MEAW）technique in permanent dentition. Methods    MEAW technique was applied to treat 16 cases of skeletal mandibular deviation with 0.56 mm × 0.71 mm MBT bracket system. Panoramics and cephalometric radiographs were taken and compared before and after treatment. Results    After average treatment time of 20 months，totally 16 cases gained perfect therapeutic effect with molar distal tipping and movement（mean value：tipping 7.63°；movement 3.38 mm），lingual inclination in lower anterior teeth with the change 3.31 mm during treatment；but mandible bone remained asymmetric before and after treatment and there was little change happened on jaws. Conclusion    Skeletal mandibular deviation in permanent dentition can be treated successfully by multiloop edgewise arch wire technique，that is so-called “compensatory treatment”.

Key words: skeletal mandibultar deviation, multiloop edgewise arch wire, cephalometric analysis

摘要：

目的    探讨多曲方丝弓（MEAW）技术矫治恒牙期骨性下颌偏斜的矫治原理和临床疗效。方法    选取2006—2014年就诊于苏州卫生职业技术学院附属口腔医院正畸科门诊的骨性下颌偏斜患者16例，选用0.56 mm × 0.71 mm MBT系统托槽，采用MEAW技术进行矫治。矫治前后拍摄X线曲面断层片及头颅侧位片，并进行定点测量，对测量结果进行比较分析。结果    16例骨性下颌偏斜患者平均矫治时间20个月，均取得良好的矫治效果。头影测量分析显示，治疗后下磨牙远中直立移动，平均远中直立7.63°，平均远中移动3.38 mm；下前牙平均舌倾内收3.31 mm；下颌骨治疗前后不对称，治疗前后颌骨改变小。结论    采用MEAW技术可有效矫正恒牙期骨性下颌偏斜，为代偿掩饰性矫正。

关键词: 下颌偏斜, 多曲方丝弓, 头影测量