Fig. 5

Comparison of ROM、IDP and AFS at the L4-L5 segment of different models. A-C indicates ROM, D-F indicates IDP, and G-L indicates AFS. The model A (intact normal model); the model A1 (hemi-laminectomy); the model A2 (total laminectomy); the model A3 (one-third laminectomy); The model B (intact spondylolisthesis model); the model B1 (hemi-laminectomy); the model B2 (total laminectomy); the model B3 (one-third laminectomy); FLE, flexion; EXT, extension