Computational development of a polyethylene wear model for the articular and backside surfaces in modular total knee replacements |
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| Affiliation: | 1. School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China;2. Naton Institute of Medical Technology, Beijing 100095, China;3. Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. Ltd., Beijing 100082, China;4. Beijing Medical Implant Engineering Research Center, Beijing Naton Technology Group Co. Ltd., Beijing 100082, China;5. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | A computational model to predict polyethylene wear in modular total knee replacements was developed. The results from knee simulator wear tests were implemented with finite element simulations to identify the wear factors of Archard's wear law. The calculated wear factor for the articular and backside surface was 1.03±0.22×10?7 mm3/Nm and 2.43±0.52×10?10 mm3/Nm, respectively. The difference in wear factors was attributed to differences in wear mode and wear mechanisms between the articular (mainly two-body rolling/sliding wear mode with an abrasive/adhesive wear mechanism) and the backside surfaces (mainly fretting wear mode with an adhesive wear mechanism). |
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