Journal
VIRTUAL AND PHYSICAL PROTOTYPING
Volume 13, Issue 4, Pages 266-281Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17452759.2018.1491713
Keywords
Lattice structures; additive manufacturing; bone implants; geometric design
Funding
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation of South Africa [97994]
- Collaborative Program in Additive Manufacturing [CSIR-NLCCPAM-15-MOA-CUT-01]
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The aim of this study was to compare traditional strut-based lattices with minimal surface designs using morphological analysis and image-based simulations of design files. While the two types have been studied widely, no direct comparison has ever been done. Surprisingly, there are no major differences in performance between the two types generally, but minimal surface designs do outperform slightly on angular load simulation. However, minimal surface designs in this density range are shown to have very thin walls, potentially making their accurate production more challenging, or more suitable for applications where larger pore sizes and sheet thicknesses may be applicable. Interesting results such as dual pore size distributions and variations in tortuosity of pore networks are demonstrated, with differences between various designs. The results show that all the tested designs are suitable for bone implants, but the best design might be selected based on its specialised performance requirements.
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