拔牙矫治对不同错牙合畸形患者面部高度影响的初步分析.pdf

差异性。 结果：1.青少年Angle Ⅰ类拔除上下颌第一前磨牙组与没有拔牙组面高 在治疗后均增大，其中N-Me与ANS-Me矫治前后差异具有显著性 （P 0.05），组间比较变化量没有显著性差异（P 0.05）。2.青少年Angle Ⅱ类拔除上下颌第一前磨牙组与没有拔牙组面高在治疗以后均增大， 其中N-Me与ANS-Me矫治前后差异具有显著性 （P 0.05），组间变化量 比较差异不明显 （P 0.05）。3.青少年安氏Ⅰ、Ⅱ类错牙合畸形非拔牙 组与拔牙组患者的 N-ANS、S-Go、U6-PP、L6-MP、ANS-Me/N-Me、 S-Go/N-Me在治疗前后无显著差异性（P 0.05），患者的SN-MP、FH-MP、 Y axis在治疗前后差异无显著性 （P 0.05），组间比较也无显著差异 性。4.青少年Angle Ⅰ、Ⅱ类病人各组矫治前后面高的增加量相比无明 显差异性。结论：1.青少年安氏I、Ⅱ类错牙合非拔牙与拔牙组治疗后N-Me 和ANS-Me均增加。2.青少年安氏I、Ⅱ类错牙合非拔牙与拔牙组治疗前后 面高的变化量相比没有明显差异。3.青少年安氏I、Ⅱ类错牙合拔牙矫治 对下颌平面角没有显著影响。 关键词：拔牙；面部高度；正畸治疗 2 A study on the influence of dentofacial vertical changes in different malocclusions treated with extraction Abstract ：Objective：This cephalometric study was to investigate the influence of vertical dimension changes after orthodontic treatment with the 4 first premolars extraction in Angle Class I and Class Ⅱ malocclusions teenagers ．This research will provide the reference for clinical treatment and treatment scheme. Methods ：The sixty patients were selected from stomatological hospital of LuZhou medical college according to study criterion from 150 Angle Class I malocclusions and Angle Class Ⅱmalocclusions patients who had finished treatment before 2013 January. The subjects were composed of 30 patients of Angle Class I malocclusions and 30 patients of Angle Class Ⅱmalocclusions. In Class I malocclusions, non-extraction group included 15 patients (7 female，8 male ，average age，12.8 years) ．Extraction group included 15 patients (8 female，7 male ，average age，12.6 years) with maxillary and mandibular first premolars extraction. In Angle Class Ⅱmalocclusions ，non-extraction group included 15 patients (9 female ，6 male ，average age ，12.6 years) ．Extraction group included 15patients (8 female，7 male ，average