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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers
Journal of the mechanical behavior of biomedical materials, v 31, pp 117-134
Mar 2014
PMID: 23831149
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The introduction of numerous formulations of Ultra-high molecular weight polyethylene (UHMWPE), which is widely used as a bearing material in orthopedic implants, necessitated screening of bearing couples to identify promising iterations for expensive joint simulations. Pin-on-disk (POD) testers capable of multidirectional sliding can correctly rank formulations of UHMWPE with respect to their predictive in vivo wear behavior. However, there are still uncertainties regarding POD test parameters for facilitating clinically relevant wear mechanisms of UHMWPE. Studies on the development of POD testing were briefly summarized. We systematically reviewed wear rate data of UHMWPE generated by POD testers. To determine if POD testing was capable of correctly ranking bearings and if test parameters outlined in ASTM F732 enabled differentiation between wear behavior of various formulations, mean wear rates of non-irradiated, conventional (25-50kGy) and highly crosslinked (≥90kGy) UHMWPE were grouped and compared. The mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 7.03, 5.39 and 0.67mm(3)/MC. Based on studies that complied with the guidelines of ASTM F732, the mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 0.32, 0.21 and 0.04mm(3)/km, respectively. In both sets of results, the mean wear rate of highly crosslinked UHMPWE was smaller than both conventional and non-irradiated UHMWPEs (p<0.05). Thus, POD testers can compare highly crosslinked and conventional UHMWPEs despite different test parameters. Narrowing the allowable range for standardized test parameters could improve sensitivity of multi-axial testers in correctly ranking materials.
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Details
- Title
- Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers
- Creators
- D Baykal - Drexel UniversityR S Siskey - ExponentH Haider - University of Nebraska Medical CenterV Saikko - Aalto UniversityT Ahlroos - VTT Technical Research Centre of FinlandS M Kurtz - Exponent (United States)
- Publication Details
- Journal of the mechanical behavior of biomedical materials, v 31, pp 117-134
- Publisher
- Elsevier
- Grant note
- R01AR47904 / NIAMS NIH HHS R01 AR047904 / NIAMS NIH HHS
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000333778700012
- Scopus ID
- 2-s2.0-84894282304
- Other Identifier
- 991019167608504721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials