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目的比较单纯前方牵引与前牵引联合快速扩弓治疗替牙期以上颌骨发育不足的安氏骨性Ⅲ类错合临床效果。方法 30例替牙期以上颌骨发育不足特征的安氏骨性Ⅲ类错合患者,分为两组:A组15例,单纯前牵引;B组15例,前牵引联合快速扩弓进行矫治,治疗开始时和结束时分别拍摄头颅定位侧位片,进行定点测量,使用SPSS13.0统计软件进行分析。结果 1两组上颌骨及上前牙变化趋势相同,软组织侧貌明显改善。2A组SN-PP减小1.19°,B组减小0.6°,而Y轴角增加,下面高的变化,U1-NA角的增大,治疗后面型角的变化,在B组中更明显。结论 1替牙期进行上颌前牵引可有效矫治上颌骨发育不足,2前牵引联合快速扩弓可减轻腭平面逆时针旋转,减少前牙唇倾,侧貌改善更显著。
Objective To compare the clinical effect of simple anterior traction with rapid trabeculectomy in the treatment of Angle’s skeletal Class Ⅲ malocclusion with maxillary hypoplasia. Methods Thirty patients with Angle skeletal Class Ⅲ malocclusion with maxillary hypoplasia were divided into two groups: group A (n = 15), simple anterior traction; group B (n = 15), pre-traction combined with rapid expansion At the beginning of the treatment and the end of the treatment, the skull positioning lateral radiographs were taken and sentinel measurements were made and analyzed using SPSS 13.0 statistical software. Results 1 The two groups of maxillary and anterior teeth changes the same trend, soft tissue profile improved significantly. In group 2A, SN-PP decreased by 1.19 °, in group B decreased by 0.6 °, while Y-axis increased, the following changes were higher, and the angle of U1-NA increased. Conclusion 1 maxillary anterior maxillary traction can effectively correct maxillary hypoplasia, 2 pre-traction combined with rapid expansion can reduce the anti-clockwise rotation of the palatal plane, reduce the anterior lip lip, the more significant improvement in the profile.