Professor Junjie Wu junjie.wu@durham.ac.uk
Professor
We have previously reported upon a cohort of patients with premature failure of such material and postulated upon the impact of abnormally high concentrations of type 2 fusion defects whereby there is a lack of particle cohesion due to incomplete diffusion. In vivo oxidation has been purported to underscore the premature failure of polyethylene. The mechanism of such remains poorly delineated. New data has now been obtained by determining substrata oxidative profiles of 10 failed Kinemax Plus modular tibial insert analyses in conjunction with fusion defect detection. The full thickness of a series of cores was analysed using infra-red spectroscopy to identify higher levels of oxidation in loaded used material at both the articulating and non-articulating regions. A comparison was made to an unused control. Articulating, loaded, areas exhibited greater local concentrations of oxidised material and wider variation of such consistent with the higher presence of fusion defects. Subsurface analysis confirmed the presence of a major oxidative peak 2 mm below the surface for all loaded areas irrespective of wear. Additionally we were able to identify a second major oxidative focus about halfway between the inferior (tibial baseplate) surface and the articulating area. We believe that the combination of high oxidation and fusion defects represents a second high stress zone consistent with the observation of tibial baseplate polyethylene dissociation and backside wear with resultant catastrophic material failure.
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 18, 2011 |
Online Publication Date | Feb 16, 2011 |
Publication Date | 2012-03 |
Deposit Date | Jan 4, 2012 |
Journal | The Knee |
Print ISSN | 0968-0160 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 19 |
Issue | 2 |
Pages | 124-129 |
DOI | https://doi.org/10.1016/j.knee.2011.01.004 |
Public URL | https://durham-repository.worktribe.com/output/1501407 |
Biotribological and Structural Analyses of Large Diameter Ceramic on Carbon Fibre Reinforced PEEK Hip Joints with Different Inclination
(2011)
Presentation / Conference Contribution
A mathematical model of the eye lens epithelium of mammals that predicts cell density profiles in the ageing lens.
(2015)
Presentation / Conference Contribution
Prosim Simulator Wear Study of 60mm Diameter Zirconia Toughened Alumina Composite Hip Bearings: The Effect of High Cup Inclination Angle and Microseparation
(2011)
Presentation / Conference Contribution
Effect of Knee, Ankle and Hip Joint Replacements on Vitamin E Infused Highly Crosslinked UHMWPE Wear Particles Size, Shape and Morphologies Using a New Modified Base Digestion Method
(2015)
Presentation / Conference Contribution
Do structural alterations mediated by enzymatic activities influence the mechanical properties of capsular biomembranes?
(2014)
Presentation / Conference Contribution
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
Apache License Version 2.0 (http://www.apache.org/licenses/)
Apache License Version 2.0 (http://www.apache.org/licenses/)
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search