Fig. 4

Type b bone fusion. a–f A 41-year-old woman whose preoperative cervical MRI (a) revealed C4/5 disc herniation compressing the spinal cord underwent 1-level corpectomy with an n-HA/PA66 strut. Lateral X-ray films indicated bony fusion of the autogenous bone granules filling the strut, and subsidence was observed at the 6-month, 12-month, and 8-year follow-up visits (b, c, e). 3-D CT at the 3-year and 8-year follow-up visits (d, f) showed solid bone fusion