Book chapter
Multiaxial Fatigue Behavior of Oxidized and Unoxidized UHMWPE During Cyclic Small Punch Testing at Body Temperature
Crosslinked and Thermally Treated Ultra-High Molecular Weight Polyethylene for Joint Replacements, pp 117-136
01 Jan 2004
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We hypothesized that oxidation would influence the resistance to fatigue crack initiation and propagation of Ultra-High molecular weight polyethylene (UHMWPE). We subjected tibial insert surrogates (ram extruded GUR 1050) to accelerated aging protocols following ASTM F 2003-00 (14, 21 and 28 days). Subsurface disc specimens from the control and aged materials at each time period were subjected to cyclic small punch loading to failure (modification of ASTM F 2183-02). A significant decrease in fatigue loading was observed, relative to the un-aged controls, starting at three weeks of accelerated aging. Furthermore, SEM examination of the failed aged specimens revealed a network of multiple secondary initiation sites, which was also confirmed by observation with endoscopy, and microCT. Thus, in contrast to the unoxidized highly crosslinked conventional materials evaluated previously, the oxidized materials failed by the initiation and propagation of cracks from numerous initiation sites with the brittle appearance increasing with oxidation time. These results suggest that oxidized UHMWPE exhibits a different fatigue crack initiation and propagation behavior compared to unoxidized virgin, and crosslinked UHMWPE. Future studies will be needed to increase our understanding of the clinically acceptable fatigue properties for new tibial bearing materials, such as highly crosslinked UHMWPEs.
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Details
- Title
- Multiaxial Fatigue Behavior of Oxidized and Unoxidized UHMWPE During Cyclic Small Punch Testing at Body Temperature
- Creators
- M L Villarraga - Implant Research Center, School of Biomedical Engineering, Science, and Health Systems, Drexel UniversityA A Edidin - Implant Research Center, School of Biomedical Engineering, Science, and Health Systems, Drexel UniversityM Herr - School of Biomedical Engineering, Science, and Health Systems, Drexel UniversityS M Kurtz - Drexel University
- Publication Details
- Crosslinked and Thermally Treated Ultra-High Molecular Weight Polyethylene for Joint Replacements, pp 117-136
- Publisher
- ASTM International; 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959
- Number of pages
- 20
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000189423700009
- Scopus ID
- 2-s2.0-1342312416
- Other Identifier
- 991019173949504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials
- Orthopedics
- Polymer Science