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<p>This study explores the design, fabrication, and mechanical evaluation of the&#xa0;inhomogeneous Schwarz diamond lattice structures intended for use in load-bearing orthopedic implants. These lattice structures were created using the selective laser melting (SLM) process, with pore sizes varying from 500 to 2000&#xa0;µm. To assess their geometrical accuracy and mass transport capabilities, a series of evaluations, including micro-CT analysis, density measurements, and permeability tests, were performed. The mechanical tests revealed that the fabricated structures exhibited ductile behavior, showcasing excellent strength and stiffness, particularly in two groups of lattices with higher porosity. The irregular distribution of pore sizes in these lattices led to ideal bending-dominated behavior for stiffness and stretch-dominated behavior for strength. These findings indicate that the inhomogeneous Schwarz diamond lattice structures hold significant promise as micro-architected implants. Their high strength-to-stiffness ratio makes them particularly suitable for orthopedic applications, where such characteristics are crucial for effective load-bearing performance. This research highlights the potential benefits&#xa0;of using advanced lattice designs to improve implant functionality and enhance&#xa0;integration with host tissues.</p>

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Inhomogeneous Schwarz Diamond Lattice Structures for Load-Bearing Orthopedic Implants: Fabrication and Mechanical Evaluation

  • 期刊论文

  • 发表日期：

    2025年2月18日

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  • Fatemeh Zarei,
  • Aziz Shafiei-Zarghani

摘要

This study explores the design, fabrication, and mechanical evaluation of the inhomogeneous Schwarz diamond lattice structures intended for use in load-bearing orthopedic implants. These lattice structures were created using the selective laser melting (SLM) process, with pore sizes varying from 500 to 2000 µm. To assess their geometrical accuracy and mass transport capabilities, a series of evaluations, including micro-CT analysis, density measurements, and permeability tests, were performed. The mechanical tests revealed that the fabricated structures exhibited ductile behavior, showcasing excellent strength and stiffness, particularly in two groups of lattices with higher porosity. The irregular distribution of pore sizes in these lattices led to ideal bending-dominated behavior for stiffness and stretch-dominated behavior for strength. These findings indicate that the inhomogeneous Schwarz diamond lattice structures hold significant promise as micro-architected implants. Their high strength-to-stiffness ratio makes them particularly suitable for orthopedic applications, where such characteristics are crucial for effective load-bearing performance. This research highlights the potential benefits of using advanced lattice designs to improve implant functionality and enhance integration with host tissues.