Research on parametric construction and compressive mechanical properties of biomimetic bone trabecular porous scaffold based on Voronoi tessellation

Aperiodic porous structures have become the preferred choice for bone scaffold design due to the similarity to human bone tissue in structural characteristics. However, their mechanical properties still remain unclear. In this paper, an aperiodic porous structure was constructed using probabilistic ball method based on the Voronoi principle. The effects of modeling parameters (seed number and minimum cross-sectional area) on the porosity, specific surface area and compression mechanical properties of the porous scaffold were studied. The results found that the seed number increased could cause a slight increase in porosity and a significant increase in specific surface area; the minimum cross-sectional area of the pillars had slight influence on the specific surface area and porosity of the model. The porosity of the porous scaffold was decided mainly by ratio coefficient of modeling. The constructed porous scaffolds not only had good energy absorption, but also could match the mechanical parameters of nature bone by adjusting the modeling parameters. It could provide reference data for the design of porous bone implants.