Fig. 1From: Immediate reduction under general anesthesia and combined anterior and posterior fusion in the treatment of distraction-flexion injury in the lower cervical spineCalculation of CCI. “ab” was the line connecting posterior inferior edge of the C2 and C7 vertebral body. “a1” to “a4” respectively represented the vertical distance from posterior inferior edge of the C3-C6 to “ab.” CCI = [(a1 + a2 + a3 + a4)/ab] × 100%Back to article page