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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

From: Effect of sagittal screw angle and distance of screw apex to superior endplate on adjacent segment disease after posterolateral lumbar fusion: a retrospective study

Fig. 2

Comparison of ASD diagnosis-related parameters perioperatively and at the last follow-up by lateral radiograph. A non-ASD patient without pathological adjacent vertebral and intervertebral disk changes. B Narrowing of disk height (> 3 mm) accompanied by wedge compression of the upper vertebral body. C posterior slippage (> 3 mm) of L3 vertebral. D posterior opening at L3–4 in the flexion position after surgery (> 5°)

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X