Study on mechanical properties and permeability of elliptical porous scaffold based on the SLM manufactured medical Ti6Al4V

PLoS One. 2021 Mar 4;16(3):e0247764. doi: 10.1371/journal.pone.0247764. eCollection 2021.

Abstract

In this paper, we take the elliptical pore structure which is similar to the microstructure of cancellous bone as the research object, four groups of bone scaffolds were designed from the perspective of pore size, porosity and pore distribution. The size of the all scaffolds were uniformly designed as 10 × 10 × 12 mm. Four groups of model samples were prepared by selective laser melting (SLM) and Ti6Al4V materials. The statics performance of the scaffolds was comprehensively evaluated by mechanical compression simulation and mechanical compression test, the manufacturing error of the scaffold samples were evaluated by scanning electron microscope (SEM), and the permeability of the scaffolds were predicted and evaluated by simulation analysis of computational fluid dynamics (CFD). The results show that the different distribution of porosity, pore size and pores of the elliptical scaffold have a certain influence on the mechanical properties and permeability of the scaffold, and the reasonable size and angle distribution of the elliptical pore can match the mechanical properties and permeability of the elliptical pore scaffold with human cancellous bone, which has great potential for research and application in the field of artificial bone scaffold.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alloys / chemistry*
  • Cancellous Bone / anatomy & histology
  • Cancellous Bone / chemistry*
  • Cancellous Bone / metabolism
  • Humans
  • Lasers
  • Permeability
  • Porosity
  • Stress, Mechanical
  • Tissue Engineering / methods*
  • Tissue Scaffolds / chemistry*
  • Titanium / chemistry*

Substances

  • Alloys
  • titanium alloy (TiAl6V4)
  • Titanium

Grants and funding

This study was supported by Natural Science Foundation of Qinghai Province (No. 2020-ZJ-394 953Q) and Natural Science Foundation of Qinghai Nationalities University (No. 2019XJG04).