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Design of Metallic Lattices for Bone Implants by Additive Manufacturing

  • Daniel BarbaEmail author
  • Roger C. Reed
  • Enrique Alabort
Conference paper
  • 465 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

A broad range of synthetic trabecular-like metallic lattices is 3D printed in Ti-6Al-4V by SLM. The aim is to propose new conceptual types of implant structures for superior biomechanical matching and osseo-integration: synthetic bone. Systematic evaluation is then carried out: (i) their accuracy is characterised using HR X-ray tomography, to assess deviations from the original geometrical design intent and (ii) the mechanical properties—stiffness and strength—are experimentally measured and compared. Finally, this new knowledge is synthesised in a conceptual framework in the form of implant design maps, to define the processing conditions of bone tailored substitutes. The design criteria emphasise (a) the bone stiffness matching, (b) preferred range of pore structure for bone ingrowth, (c) manufacturability, and (d) choice of inherent materials properties for durable implants. The power of this framework is demonstrated in the design of a prototype spine fusion device.

Keywords

Lattice structures Topological optimisation Mechanical properties of AM materials Manufacturability 

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Daniel Barba
    • 1
    • 2
    Email author
  • Roger C. Reed
    • 1
    • 3
  • Enrique Alabort
    • 4
  1. 1.Department of MaterialsUniversity of OxfordOxfordUK
  2. 2.Department of Aerospace MaterialsETSIAE, Polytechnic University of MadridMadridSpain
  3. 3.Department of Engineering ScienceUniversity of OxfordOxfordUK
  4. 4.OxMet TechnologiesYarntonUK

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