Structural design and performance study of primitive triply periodic minimal surfaces Ti6Al4V biomimetic scaffold

This paper comprehensively evaluated the static mechanical compressive properties, permeability, and cell adhesion effect on the inner wall of the Primitive triply periodic minimal surface Ti6Al4V bionic scaffolds with different axial diameter ratios through numerical simulation and experiments. The results show that when the axial diameter ratio is 1:2, the elastic modulus of the scaffold is about 1.25 and the yield strength is about 1.36. The scaffold's longitudinal and transverse mechanical properties align with human bone tissue. Its permeability is also better than that of circular pores. The scaffold with an axial diameter ratio of 1:3 has the best permeability, ranging from 1.28e−8 to 1.60e−8 m(2), which is more conducive to the adsorption of cells on the inner wall of the scaffold. These results show that the scaffold structure with an axial diameter ratio of not 1:1 has more advantages than the ordinary uniform scaffold structure with an axial diameter ratio of 1:1. This is of great significance to the optimal design of scaffold.