微螺钉种植体和口外弓增强支抗矫治成人安氏Ⅱ类1分类错牙合畸形的临床疗效对比

Comparison of the treatment of Angle's class Ⅱ division 1 malocclusion in adults with micro-screw implant anchorage and Headgear anchorage technique

目的:比较应用微螺钉种植体和口外弓支抗矫治成人安氏Ⅱ类1分类错牙合畸形的临床效果。方法:将30例成人安氏Ⅱ类1分类错牙合畸形患者随机分为实验组和对照组,每组15例,分别采用微螺钉种植体支抗和口外弓支抗结合直丝弓技术矫治,分析治疗前后头影测量指标的变化和正畸疗程的差异。结果:实验组的OJ、U1-SN、U1-NA和U6-Ptm治疗前后的变化较对照组明显,两组差异有统计学意义(P<0.05);实验组的正畸疗程平均为(19.35±1.29)个月,对照组平均为(24.02±1.21)个月,两组差异具有统计学意义(P<0.05)。结论:相对口外弓支抗,微螺钉种植体支抗能更好地保护磨牙支抗,缩短正畸疗程,更有效地改善成人安氏Ⅱ类1分类错牙合畸形患者的面型凸度及覆牙合覆盖关系。

Objective To compare the clinical effects of micro-screw implant and headgear in anchorage control.Methods 30 adults of Angle＇s classⅡ division 1 malocclusion were selected and randomly divided into two groups,treating with micro-screw implant（the experiment group,n=15） and headgear（the control group,n=15） respectively. Cephalometric analysis was used before and after orthodontic treatment to evaluate the changes of 5 parameters and the treatment time was recorded.Results The curative effects were different between the experiment group and the control group.The values such as U1-SN（°）,U1-NA（mm）,U6-ptm（mm） and OJ（mm） displayed more effective results in the experiment group.All the differences had statistic meanings.The average period of treatment is shorter in the experiment group than in the control group.Conclusion Compared with the traditional anchorage technique,micro-screw implant anchorage can control teeth movement better and shorten the treatment time.