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骨性Ⅲ类错牙合畸形患者拔牙矫治后的软硬组织变化研究

张红1,王建国2,张锡忠2,魏志强2,郭晨3   

  1. 1. 天津医科大学
    2. 天津市口腔医院
    3. 天津医科大学研究生院
  • 收稿日期:2013-08-14 修回日期:2014-01-10 出版日期:2014-05-15 发布日期:2014-05-15
  • 通讯作者: 张红

The Study of Soft Tissue Profile Changes and the Relationship with the Hard Tissue in the Class III Malocclusion Patients treated with Premolar Extraction

  • Received:2013-08-14 Revised:2014-01-10 Published:2014-05-15 Online:2014-05-15

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摘要： 【摘要】 目的 探讨成人骨性Ⅲ类错牙合畸形患者拔牙矫治后软硬组织变化的相关关系。 方法 应用回顾性研究方法，选取符合纳入标准的34例成人骨性Ⅲ类错牙合畸形患者，对其头颅侧位片进行测量分析，比较骨性Ⅲ类错牙合畸形患者正畸治疗前后相关测量项目的变化。 结果 骨性Ⅲ类错牙合畸形患者经过正畸治疗后，上切牙长轴与前颅底平面交角（U1-SN）（°）减小5.22°，下切牙长轴与下颌平面角交角（L1-MP）（°）减小13.86°，下颌平面角增加1.78°，差异有统计学意义（P＜0.01)；以SL垂直线为参考线，上颌切牙牙冠突度减小2.41mm，下颌牙冠突度减小6.49mm，差异有统计学意义（P＜0.01)；上唇突度减小1.34mm，下唇突度减小3.82mm，颌凸角增大3.36°、H角减小2.96°，差异有统计学意义（P＜0.05或P＜0.01），颏部变化无统计学差异；上唇突度的变化与上切牙突度变化有显著相关性，下唇突度的变化与上切牙突度变化、下切牙突度变化均有相关性，且上唇突度变化与下唇突度变化间有相关性。结论 骨性Ⅲ类错牙合畸形患者拔牙矫治后侧貌得到明显改善，软组织与硬组织的变化存在中度相关关系。

关键词: 骨性Ⅲ类, 错牙合畸形, 拔牙矫治, 软组织侧貌

Abstract: 【Abstract】 Objective: To investigate the soft tissue changes and the relationship with the hard tissue in the class III malocclusion adult patients treated with premolar extraction. Methods: Thirty-four adult patients with skeletal class III malocclusion who met the including criteria were included into this retrospective study. Lateral cephalographs of pre and post treatment were traced.Relevant measurements of pre and post treatment were analyzed. Results: After orthodontic treatment，the values of U1-SN（°） was descreased 5.22°, the values of L1-MP（°）was descreased 13.86°，the angle of MP/FH was increased 1.78°averagely.The SL line as a reference，the retraction of upper incisor was 2.41mm，the retraction of lower incisors was 6.49mm significantly；the retraction of upper lips was 1.34mm，the retraction of lower lips was 3.82mm，the values of Ns-Sn-Pos was increased 3.36°, the values of H angle was descreased 2.96°，after orthodontic treatment（P＜0.05 or P＜0.01）. Relevant measurements of chin were non-significanty. The retraction of upper incisor was the only measurement positively correlated with upper lip retraction. The retraction of upper incisor and lower incisor were correlated with the lower lip retraction；the upper lip retraction was correlated with lower lip retraction. Conclusions：Soft tissue profile improved significantly after four premolars extraction.The changes of soft tissue profile was moderate correlated with hard tissue.

Key words: skeletal class III, malocclusion Orthodontic, extraction treatment, soft tissue profile