Publication

An investigation of the inelastic behaviour of trabecular bone during the press-fit implantation of a tibial component in total knee arthroplasty

Kelly, Nicola
; 
Cawley, DT
; 
Shannon, FJ
; 
McGarry, J. Patrick
Thumbnail Image
Files
Thumbnail Image
Kelly_et_al_2013_Medical_Engineering_and_Physics.pdf
Adobe PDF, 360.27 KB
Repository DOI
Publication Date
2013
Keywords
Total knee arthroplasty, Press-fit implantation, Finite element analysis, Trabecular bone plasticity, Polyurethane foam, Pressure dependent yielding
Type
Article
Downloads
Show all metadata
Citation
Kelly N, Cawley DT, Shannon FJ, McGarry JP (2013) 'An investigation of the inelastic behaviour of trabecular bone during the press-fit implantation of a tibial component in total knee arthroplasty'. Medical Engineering & Physics.
Abstract
The stress distribution and plastic deformation of peri-prosthetic trabecular bone during press-fit tibial component implantation in total knee arthroplasty is investigated using experimental and finite element techniques. It is revealed that the computed stress distribution, implantation force and plastic deformation in the trabecular bone is highly dependent on the plasticity formulation implemented. By incorporating pressure dependent yielding using a crushable foam plasticity formulation to simulate the trabecular bone during implantation, highly localised stress concentrations and plastic deformation are computed at the bone-implant interface. If the pressure dependent yield is neglected using a traditional von Mises plasticity formulation, a significantly different stress distribution and implantation force is computed in the peri-prosthetic trabecular bone. The results of the study highlight the importance of: (i) simulating the insertion process of press-fit stem implantation; (ii) implementing a pressure dependent plasticity formulation, such as the crushable foam plasticity formulation, for the trabecular bone; (iii) incorporating friction at the implant-bone interface during stem insertion. Simulation of the press-fit implantation process with an appropriate pressure dependent plasticity formulation should be implemented in the design and assessment of arthroplasty prostheses.
Funder
|~|Other|~|
Publisher
Institute of Physics and Engineering in Medicine by Elsevier Ltd.
Publisher DOI
http://dx.doi.org/10.1016/j.medengphy.2013.05.007
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland
cbn
Collections
Biomedical Engineering (Scholarly Articles)