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目的:探讨应用改良颊侧多曲簧活动矫治器矫治早期骨性Ⅲ类错牙合患者,比较矫治前后软硬组织测量值的变化。方法:早期骨性Ⅲ类错牙合患者30名,采用改良颊侧多曲簧活动矫治器,矫治前后拍摄X线头颅侧位定位片并制取模型,测量软硬组织参数,采用SPSS16.0软件进行统计学分析,比较矫治前后软硬组织变化情况。结果:改良颊侧多曲簧活动矫治器矫治早期骨性Ⅲ类错牙合,治疗前后头影测量的SNA(°)、ANB(°)、Y-axis(°)、Ns-Sn-Pos(°)、UL-EP(mm)、LL-EP(mm)项目比较均有显著性差异(P<0.01),上颌尖牙和第一前磨牙区牙弓宽度、第一前磨牙区基骨宽度前、后测量项目的比较均有显著性差异(P<0.01),上颌牙弓长度、上颌基骨长度、下颌第一前磨牙区牙弓宽度和下颌基骨的宽度前、后测量项目比较均有差异(P<0.05)。结论:应用改良颊侧多曲簧活动矫治器治疗早期骨性Ⅲ类错牙合患者,能够促进上颌骨生长,增加上颌凸度和宽度,限制下颌骨的过度生长,显著改善侧貌。
Objective: To explore the application of modified buccal multi-turn activity appliance in the treatment of patients with early stage skeletal Class Ⅲ malocclusion. The changes of the measured values before and after the treatment were compared. Methods: Thirty patients with early type Ⅲ malocclusion were treated with modified buccal multi-coil apparatus. The X-ray cephalometric images were taken before and after treatment. The parameters of the soft and hard tissues were measured and the parameters were determined by SPSS16.0 Software for statistical analysis, comparison of soft and hard tissue changes before and after treatment. Results: The results of CNA and ANS (°), Y-axis (°) and Ns-Sn-Pos (P <0.01). The arch width of the maxillary canine and the first premolar area, the width of the basement of the first premolar area Before and after the measurement items were significantly different (P <0.01), maxillary dental arch length, maxillary base bone length, mandibular first premolar area dental arch width and mandibular width of the front and back measurement items were compared There are differences (P <0.05). Conclusion: The treatment of patients with early stage skeletal Class Ⅲ malocclusion by modified buccal multi-turn activity appliance can promote maxillary growth, increase maxillary convexity and width, limit excessive growth of mandible, and significantly improve lateral appearance.