Figure 1.The longitudinal comparison of the bone in-growth in different spatial structures screws (local feature). The black area is the screw and the dyed area (purple) is the bone in-growth tissue. The distribution area and density of chondrocytes in the pore of the screw increased in both trabecular and regular hexahedron structure groups at the three follow-up time points (3, 6, 12 weeks).
