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The geometry of porous bone scaffolds has an important effect on its bone ingrowth, but there is still a lack of in-depth research on this aspect. This study establishes a curved structure and a strut structure with a porosity of 65% and a pore size of 650 μm. The rabbit femoral condyle implants were used to assess the bone ingrowth. The pressure cloud chart and the velocity streamline inside the scaffold structure were calculated by computational fluid dynamics (CFD). The results show that the osteogenic property of a curved structure is better than that of a strut structure, but the mechanical property is not as good as that of the strut structure. The velocity streamline and velocity difference inside the scaffold structure has a great influence on bone ingrowth. Under the same condition, the smaller the fluid velocity difference inside the scaffold structure, the larger the fluid flow area, and the better the bone tissue growth. Studies have shown that the geometry of the bone scaffold can be optimized according to different implantation sites to meet the requirements of different implantation sites.

In this paper, two groups of titanium alloy and biodegradable ceramic scaffolds with the same pore structure were designed, and the cell proliferation and bone tissue growth of the two groups were studied by cell proliferation experiment and animal experiment. The results show that the biological properties of biodegradable ceramic scaffolds are obviously better than those of titanium alloy scaffolds. The cell proliferation experiment in vitro showed that with the passage of time, the number of cell proliferation and the activity of ALP in biodegradable ceramic scaffolds were higher than those in titanium alloy scaffolds. The results of animal implantation experiments show that the amount of bone tissue in the ceramic scaffold is several times than that of titanium alloy in the same implantation time, indicating that the ceramic scaffold has great research and application potential in the field of bone tissue engineering.

In this paper, the results of the study on the performance of four groups of different honeycomb structures show that the application of honeycomb structure in the design of biomimetic bone scaffold is feasible and promising. In terms of static properties, the elastic modulus (1.6–3 GPa) of the four scaffolds matched the elastic modulus of human cancellous bone (0.1–4.5 GPa), and the yield strength (88–146 MPa) was much higher than that of the femoral neck (0.56–3.71 MPa). In terms of permeability, except for the excessive permeability of SU scaffold, the permeability of the other three groups of scaffolds (1.5*10−8–4.8*10−8 m2) are all in the range of cancellous bone permeability (0.5*10−8–5.0*10−8 m2). In terms of the distribution of wall shear stress, the wall shear stress of the four groups of scaffolds ranged from 2.8 to 42.8 MPa, which could stimulate cells to deposit mineralized extracellular matrix (0.55–30 MPa) in the 3D scaffold, which was conducive to bone tissue regeneration.