Bone remodeling in additive manufactured porous implants changes the stress distribution

Vee San Cheong; Aadil Mumith; Melanie J. Coathup; Gordon W. Blunn; Paul Fromme

doi:10.1117/12.2558093

22 April 2020 Bone remodeling in additive manufactured porous implants changes the stress distribution

Vee San Cheong, Aadil Mumith, Melanie J. Coathup, Gordon W. Blunn, Paul Fromme

Proceedings Volume 11381, Health Monitoring of Structural and Biological Systems XIV; 113812V (2020) https://doi.org/10.1117/12.2558093
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Safety and efficacy of additive manufactured porous implants is a growing concern due to several, recent recalls. The safety of bone implants depends on the effects of implantation and partial bone ingrowth on stress and strain. Finite element analysis, using two new algorithms to simulate bone ingrowth, was verified against histology results for an ovine condylar critical sized defect model. Implants were manufactured from Ti6Al4V using selective laser sintering. Results showed that partial bone formation reduces stress concentrations to safe levels, improving the long-term fatigue resistance. Higher bone ingrowth was predicted for implants made from lower modulus Titanium-tantalum alloy.

Citation Download Citation

Vee San Cheong, Aadil Mumith, Melanie J. Coathup, Gordon W. Blunn, and Paul Fromme "Bone remodeling in additive manufactured porous implants changes the stress distribution", Proc. SPIE 11381, Health Monitoring of Structural and Biological Systems XIV, 113812V (22 April 2020); https://doi.org/10.1117/12.2558093

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