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目的:研究垂直支持矫治器(VHA)对高角患者牙、颌、面结构垂直向位置关系的影响。方法:选择高角病例(MP-SN≥40°)40名,随机分为两组,均使用MBT直丝弓矫治器,拔除4个第一前磨牙,其中治疗组20名使用VHA,对照组20名不使用VHA,对两组病例治疗前后的头颅侧位X线片进行测量分析,比较两种不同矫治方案治疗前后牙、颌、面垂直方向的变化。结果:治疗组MP-SN角、ANS-Me距、N-Me距、L6-MP距、U6-PP距和ANS-Me/N-Me(%)治疗前后的差值较对照组有显著性差异(P<0.05);两组其他测量值差值无统计学意义(P>0.05)。结论:垂直支持矫治器在控制高角患者面部垂直向生长方面有较高临床实用价值。
Objective: To study the effect of vertical support appliance (VHA) on the vertical position of teeth, jaw and face in high-angle patients. Methods: 40 high-angle cases (MP-SN≥40 °) were selected and randomly divided into two groups. All patients underwent MBT straight wire appliance and four first premolar teeth were removed. Among them, 20 in the treatment group used VHA and 20 Name without VHA, the two groups of patients before and after treatment of cephalometric X-ray measurement analysis, comparison of two different treatment regimen before and after treatment of teeth, jaw, face the vertical direction of change. Results: The difference of MP-SN angle, ANS-Me distance, N-Me distance, L6-MP distance, U6-PP distance and ANS-Me / N-Me (P <0.05). There was no significant difference between the other two measurements (P> 0.05). Conclusion: The vertical support appliance has a high clinical value in controlling the vertical growth of face in high-angle patients.