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恒牙列早期Ⅲ类骨性错颌拔牙与否的疗效分析

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摘要 目的:分析恒牙列早期Ⅲ类骨性错颌拔牙与否的疗效差别。方法:选择32例骨性早期恒牙列班类错颌病例,其中非拔牙组17例,年龄(13.8±1.2)岁(11.9—15.3岁),平均ANB角为-2.5°,拔牙组15例,年龄(14.2±1.5)岁(12.1~15.5岁),平均ANB角为-2.2°。通过头影测量分析比较治疗前后骨骼与面部软组织的改变,探讨和分析拔牙与否的矫治方法对错颌畸形面部改善的疗效差别。结果:两组Ⅲ类侧貌软组织面中份的凹陷畸形由于矫治改建和颌骨的生长均得到改善。非拔牙组的骨骼改变以上颌骨后段的垂直生长为主,上切牙轴唇向倾斜,上腭平面和牙合平面伴有显著反时针旋转,但面部骨骼的后前面高比例保持不变。拔牙组的骨骼改变以下颌骨顺时针旋转和下切牙轴舌向倾斜改变为主,面部骨骼的后前面高比增加,上颌骨前后段的垂直生长基本一致,上腭平面和牙合平面未发生旋转改变。结论:非拔牙和拔牙治疗均可改善Ⅲ类错颌的面部凹陷畸形;非拔牙矫治主要以上颌骨和上颌切牙轴的改变为主,拔牙治疗则更多通过下颌骨和下切牙轴的变化而产生疗效。
出处 《中国民族民间医药》 2010年第1期59-60,共2页 Chinese Journal of Ethnomedicine and Ethnopharmacy
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