切除病变的关节面骨质，寰枢（椎）固定导致迅速的神经功能恢复。
Resection of the offending facetal bone and atlantoaxial fixation resulted in rapid neurological recovery.
结论寰枢椎后方经关节螺钉内固定，可提供牢固的固定，恢复寰枢椎稳定，并发症发生率低。
Conclusion Posterior facet screw fixation with low complication rate can provide rigid fixation and stability for the patients with atlantoaxial instability.
寰枢外侧关节面在矢状面上倾斜，枕骨髁、寰椎、枢椎关节发育不对称，可能是导致寰枢椎脱位的另外原因。
The lateral atlantoaxial joint surface is tilted in the sagittal plane or occipito-atlanto-axial joints are asymmetric. Each of the case may result in atlantoaxial dislocation.
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