后方环枢间距的距离小于13mm常常伴有神经学症状，俯曲位c1 - C2平移超过5 mm也意味着预后不良。
PADI of less than 13mm is associated with neurologic decline. C1-C2 translation of more than 5mm on flexion-extension radiographs also has a poor prognosis.
后方环枢间距的距离小于13mm常常伴有神经学症状，俯曲位c1 - C2平移超过5 mm也意味着预后不良。
PADI of less than 13mm is associated with neurologic decline. C1-C2 translation of more than 5mm on flexion-extension radiographs also has a poor prognosis.
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