| 摘要: |
| ［摘要］ 目的 探讨安氏Ⅰ类错（牙合）畸形拔牙矫治前后舌骨位置的变化。方法 选取青少年骨性安氏Ⅰ类牙列拥挤或双牙弓前突患者19例，拔除4颗第一双尖牙，采用直丝弓矫治技术进行矫治，疗程22～27个月。将矫治前后的X线头颅侧位定位片进行舌骨垂直及水平位置相关指标的测量，并对结果进行统计分析。结果 安氏Ⅰ类错（牙合）畸形拔牙矫治前后舌骨水平向位置及舌骨垂直向位置的测量指标均增大，多数前后差异有统计学意义(P<0.05)。结论 青少年安氏Ⅰ类错（牙合）畸形经过两年的拔牙矫治后舌骨位置趋于较后下位。 |
| 关键词: 安氏Ⅰ类错（牙合） 舌骨 拔牙 正畸 |
| DOI：10.3969/j.issn.1674-3806.2012.03.03 |
| 分类号:R 783.5 |
| 基金项目:广西卫生厅重点科研课题（编号：桂卫重200954） |
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| Effects of extraction orthodontic treatment on the hyoid bone position in patients with classⅠmalocclusions |
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FANG Zhi-xin, ZHOU Yan, ZHOU Jing, et al.
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Department of Orthodontics, the People′s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China
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| Abstract: |
| ［Abstract］ Objective To investigate the change of the hyoid bone position before and after extraction orthodontic treatment in adolescent patients with classⅠmalocclusions.Methods Nineteen adolescent patients with classⅠcrowding or bimaxillary protrusion malocclusions who received orthodontic treatment by straight wire appliance and with 4 first premolar extraction were collected.The period of the correction was 22～27 months. Cephalometric analysis of each patient were performed beforre and after trearment on the vertical and horizontal position of hyoid bone.The measurements were tested by statistical analysis.Results After extraction treatment, all the measwement of the horizontal and vertical position of hyoid bone were larger,and the change of most measurements of the horizontal and vertical position of hyoid bone showed significant difference (P<0.05).Conclusion After two years of extraction orthodontic treatment, the hyoid bone position became more posterior and lower in adolescent patients with class Ⅰmalocclusion. |
| Key words: ClassⅠmalocclusions Hyoid bone Extraction Orthodontics |
