Methods: The anterior and posterior arch of atlas were measured in103 atlas. 方法:对103例寰椎前、后弓进行了解剖学观测。
The radiographic examination showed that there were fractures in the anterior arch or/ and lateral mass of the atlas and that the atlanto-dental interval ( ADI) in these patients was 4 to 7 mm. 所有患者均伴有不同程度的横韧带损伤,23例有神经损害表现。X线检查显示寰椎弓环及侧块不同部位骨折,寰齿间距(ADI)为4~7mm。