摘要
目的:探讨非创伤性环枢关节旋转半脱位发病机理及影像学表现。材料与方法:对13例非创伤性环枢关节半脱位的临床和X线表现作回顾性分析。结果:侧位X线片上显示环椎旋转,而脊柱其它成对结构则完全重叠。C1的一侧侧块投影在齿突上,造成齿突前间隙模糊。张口位像上,环齿侧间隙和环椎侧块不对称。结论:侧位环枢关节照片和张口位X线片即可作出诊断。非创伤性和最轻型创伤性旋转半脱位具有相同X线表现。
Purpose： To study the occurring mechanism and imaging diagnosis of the nontraumatic atlantoaxial rotary subluxation.Materials and Methods： The clinic and roentgen findings of 13 atlantoaxial rotary subluxations were reviewed retrospectively.Results： The lateral radiograph demonstrates rotation of the atlas,while the paired structures of the remainder of the spine are perfectly superimposed.One lateral mass of C1 projects over the dens,making the predental space indistinct.On the open-month view,there is asymmetry of the lateral atlantodental intervals and the lateral masses of the atlas.Conclusion： The lateral radiograph and the open-mouth view can make the diagnosis..Nontraumatic has the same radiographic appearance as that of traumatic rotary subluxation,should notice difference.
出处
《现代医用影像学》
2013年第2期131-132,135,共3页
Modern Medical Imageology
关键词
环枢关节旋转半脱位
发病机理
X线表现
Atlantoaxial rotary subluxation Occurring mechanism Roentgen diagnosis
