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目的:分析西北地区替牙期骨性Ⅲ类错的构成。方法:采用计算机辅助X线头影测量技术,对第四军医大学口腔医院正畸科03～08五年间替牙期骨性Ⅲ类错的回顾性研究,分析骨性Ⅲ类患者在矢状向与垂直向的构成。结果:矢状向主要表现为上颌正常,下颌发育过度;其次为下颌正常,上颌发育不足。其它类型占比例较低。垂直向主要表现为高角或均角,低角较为少见。结论:替牙期骨性Ⅲ类错的表现形式存在差异,研究其构成有利于我们进一步认识此类错的成因,并对其防治提供一定的参考。
Objective: To analyze the composition of skeletal Class Ⅲ malocclusion in the Northwest China. Methods: The computer-aided X-ray cephalometric technique was used to study the retrospective study of the orthodontics of Stomatological Hospital of the Fourth Military Medical University from 03 to 08 years. The clinical data of skeletal class Ⅲ malocclusion in orthodontic Composition with vertical. Results: The sagittal direction was mainly normal in the upper jaw and over-developed in the mandible, followed by normal in the lower jaw and underdeveloped maxillary. Other types accounted for a lower proportion. Vertical to the main performance of high angle or angle, low angle is more rare. Conclusion: There are differences in the manifestations of skeletal Class Ⅲ malocclusion during tooth period. It is helpful for us to understand the cause of this kind of malocclusion and provide reference for its prevention and treatment.