Fig. 2

Lateral X-ray and axial computed tomography slice of patients with C-OPLL undergoing mFDL. A and B The laminas were opened from both sides, and the split spinous processes were fused with coralline hydroxyapatite (CHA) spacers. C Operative picture of mFDL, including laminectomy of C3 and the upper half of C7 as well as fixation between the spinous processes and CHA spacers (C4–6) using silk thread