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目的探讨上腭快速扩弓联合前方牵引矫治早期骨性Ⅲ类错的临床疗效。方法将早期骨性Ⅲ类错患者74例随机分为2组,每组37例。观察组采用上腭快速扩弓联合前方牵引矫治,对照组采用单纯前方牵引矫治,分别于矫治前后拍摄头颅定位侧位片,比较2组软硬组织的变化。结果矫治后,观察组上下齿槽座角、腭平面与前颅底平面的交角、下颌平面角及Wit’s值的变化较对照组更为明显(P<0.05);与矫治前比较,矫治后2组面凸角、上唇-审美平面距明显增加,颏唇角、下唇-审美平面距明显减小(P<0.05),而观察组面凸角、上唇-审美平面距及下唇-审症状平面距的变化差异有统计学意义(P<0.05)。结论上腭快速扩弓联合前方牵引可明显改善颌骨横向发育不调及凹陷型侧貌,是治疗早期骨性Ⅲ类错牙合的理想手术方式。
Objective To investigate the clinical effect of rapid palatal expansion combined with anterior traction on the treatment of early stage skeletal Class Ⅲ malocclusion. Methods 74 patients with early stage skeletal Class Ⅲ malocclusion were randomly divided into two groups, 37 cases in each group. The observation group was treated with rapid palatal expansion combined with anterior traction and the control group was treated with simple anterior traction. The skull position lateral radiographs were taken before and after treatment. The changes of the soft and hard tissues in the two groups were compared. Results After treatment, the angles of the upper and lower alveolar seated angle, the angle between the palatal plane and the anterior skull base plane, the mandibular plane angle and the Wit’s value of the observation group were more obvious than those of the control group (P <0.05) (P <0.05), and the convex angle of face group, the upper lip - the aesthetic plane distance and the lower lip-trial symptom There was significant difference in the change of plane distance (P <0.05). Conclusion The combination of rapid palatal expansion combined with anterior traction can significantly improve the lateral development of the jaw and concave shape, which is the ideal surgical treatment for early stage skeletal Class Ⅲ malocclusion.