Abstract
The stress-shielding effect can be minimized by using porous materials with pre-determined implant stiffness. This study aims to design interconnected porous metal implants that resemble the stiffness variations in a bone. Our design is intended to innovate mechanical loading conditions at the peri-implant bone, promoting a more robust implant–bone interface. The positional variations of stiffness in the scaffold are designed based on the Hounsfield Unit of computed tomography (CT) scan data of that location. Finite element (FE) analysis evaluates porous implants' performance compared to solid implants. Porous metal implants were additively manufactured with Ti6Al4V for compression test and reconstructed the 3D model from the micro-CT scan to validate the FE model. FE results revealed that porous implants generated a strain profile at peri-implant bone closer to normal bone irrespective of material property or anatomical location compared to solid implants.
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Amit Bandyopadhyay was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.
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43578_2021_307_MOESM2_ESM.jpg
Supplementary file 2 (JPG 615 kb) Fig. 11: von Mises stress (MPa) distribution on the peri-implant bone of greater trochanter for (a) natural model, (b) solid implant, (c) porous Ti6Al4V, (d) porous Ti-Mg, (e) reconstructed model
43578_2021_307_MOESM3_ESM.jpg
Supplementary file 3 (JPG 625 kb) Fig. 12: von Mises stress distribution (MPa) on the peri-implant bone of diaphysis for (a) natural model, (b) solid implant, (c) porous Ti6Al4V, (d) porous Ti-Mg, (e) reconstructed model
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Rana, M., Karmakar, S.K., Pal, B. et al. Design and manufacturing of biomimetic porous metal implants. Journal of Materials Research 36, 3952–3962 (2021). https://doi.org/10.1557/s43578-021-00307-1
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DOI: https://doi.org/10.1557/s43578-021-00307-1