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目的 研究安氏Ⅲ类错(牙合)高低角患者其磨牙轴倾度的特征及相关因素.方法 选取112例安氏Ⅲ类错(牙合)成人患者治疗前的头颅侧位片作为实验组,根据下颌平面角和后前面高比的大小将实验组分为高角组和低角组,选取55例个别正常(牙合)的头颅侧位片作为对照组,测量各组上下颌磨牙的轴倾度;对各组间的差异进行比较分析,同时对磨牙轴倾度与可能影响其变化的因素进行相关性分析.结果 高角组与低角组L7-MP、L6-MP、U6-L6有显著性差异(P＜0.05),高角组L7-MP为75.82°±6.83°,L6-MP为76.57°±5.70°,U6-L6为162.62°±6.83°;低角组L7-MP为83.36°±6.48°,L6-MP为83.01°±4.06°,U6-L6为168.63°±4.57°.且与SN-MP、S-Go/N-Me、L1-MP等存在相关关系(P＜0.05),U6-FH、U7-FH、L7-MP仅与年龄存在相关关系(P＜0.05).结论 安氏Ⅲ类错(牙合)高低角患者其磨牙轴倾度存在差异.“,”Objective The study was to investigate the molar angulations in Angle Class Ⅲ malocclusions with different vertical facial types and to analyze the correlation factors.Methods The sampleconsisted of 112 Angle Class Ⅲ malocclusion adult patients.According to their pre-treatment lateral cephalograms,they were divided by SN-MP angle and the ratio of S-Go/N-Me intohigh angle and low angle groups.55 normal occlusion patients served as control group.The molar angulation was assessed and correlation analysis was done between the molar angulation and possible impact factors.Results The mean value of L7-MP,L6-MP and U6-L6 were75.82±6.83°,75.82±6.83°and 162.62±6.83°in high angle group,and were 83.36±6.48°,83.01±4.06°,and 168.63±4.57°in low angle group,and they showed significant differences between the two groups (P＜0.05).The three angulations were found to be correlated with SN-MP、S-Go/N-Me、L1-MP (P＜0.05),while U6-FH,U7-FH,L7-MP were only correlated with age (P ＜ 0.05).ConclusionsIn AngleClass Ⅲ malocclusions,the molar angulation was different between high angle group and low angle group.