改良Twinblock矫治器与多曲方丝弓技术联合矫治骨性Ⅱ类错软硬组织变化

Treatment of Angle's ClassⅡ Malocclusion with Modified Twinblock and MEAW Technology

目的：将改良Twinblock矫治器与多曲方丝弓技术联合以矫治早期骨性Ⅱ类错[牙合],评价其对软硬组织的改变。方法：对21例11-15岁下颌发育不足为主的骨性安氏Ⅱ1错患者设计双期矫治,给予改良Twinblock功能矫治和多曲方丝弓技术治疗,调整咬合关系至正常后,给予保持。结果：治疗后正、侧面轮廓明显改善,前牙覆[牙合]、覆盖正常,磨牙关系为Ⅰ类,头影测量下颌骨的变化显著,矢状关系改善。结论：对下颌后缩型Ⅱ类错[牙合],一期改良Twinblock治疗可纠正骨骼矢状关系不调,创造良好的生长环境,二期采用多曲方丝弓技术治疗,对牙位及咬合关系精细调整,矫治效果显著。

Objective：To investigate the soft and hard tissue changes caused by Class Ⅱ malocclusion correction in the patients treated with with the modified twinblock and multiloop edgewise arch wire （MEAW）teehnology. Methods： The standard Twinblock appliance was modified by changing the retainer. 21 patients aged 11-15 yeas old（average12.8 years）with skeletal Ⅱ malocclusion were treated with twinblock and MEAW technology in two-stage treatment. Results： After two stage orthodontic treatment ,the appearance and profile were improved evidently,the overjet and overbite were normal,molars relationship was corrected to Class Ⅱ,mandibular development was remarkable improved. Conclusions： Twinblock treatment can creat a good environment for the mandible growth to patients with retrusive mandible. The MEAW treatment can align individual teeth and correct the interdigitation exactly.