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Bone remodeling in additive manufactured porous implants changes the stress distribution

Cheong, VS; Mumith, A; Coathup, MJ; Blunn, GW; Fromme, P; (2020) Bone remodeling in additive manufactured porous implants changes the stress distribution. In: Proceedings Volume 11381, Health Monitoring of Structural and Biological Systems XIV. (pp. 113812V). SPIE: Online Only. Green open access

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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.

Type: Proceedings paper
Title: Bone remodeling in additive manufactured porous implants changes the stress distribution
Event: SPIE Smart Structures + Nondestructive Evaluation
ISBN-13: 9781510635395
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2558093
Publisher version: http://dx.doi.org/10.1117/12.2558093
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: implant failure, stress shielding, laser sintered titanium alloy implant, bone ingrowth
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10104302
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