FIGURE 5.

(A–G) were respectively the stress distributions of L1 vertebral body subjected to flexion, extension, left and right flexion, left and right axial rotation, and compression test when the common PMMA bone cement was implanted, and (H–N) were the stress distributions of L1 vertebral body subjected to anterior flexion, posterior extension, left-right lateral flexion, left-right axial rotation and vertical compression test when the mineralized collagen modified bone cement PMMA bone cement was implanted.