The influence of simulator input conditions on the wear of total knee replacements: An experimental and computational study
| Autor: | Louise M. Jennings, C. Hardaker, Claire L. Brockett, John Fisher, Abdellatif Abdelgaied, Tony Haythornthwaite |
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| Rok vydání: | 2015 |
| Předmět: |
Special Issue Articles
Engineering drawing wear analysis/testing (biomechanics) Materials science Friction medicine.medical_treatment 0206 medical engineering Total knee replacement Knee replacement 02 engineering and technology Kinematics Models Biological Displacement (vector) orthopaedic tribology contact kinematics Joint simulators 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Position (vector) medicine Humans Computer Simulation Tibial insert Femoral component Arthroplasty Replacement Knee knee prostheses business.industry Mechanical Engineering 030206 dentistry General Medicine Structural engineering Polyethylene 020601 biomedical engineering Biomechanical Phenomena Equipment Failure Analysis chemistry business Knee Prosthesis |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine |
| ISSN: | 2041-3033 0954-4119 |
| Popis: | Advancements in knee replacement design, material and sterilisation processes have provided improved clinical results. However, surface wear of the polyethylene leading to osteolysis is still considered the longer-term risk factor. Experimental wear simulation is an established method for evaluating the wear performance of total joint replacements. The aim of this study was to investigate the influence of simulation input conditions, specifically input kinematic magnitudes, waveforms and directions of motion and position of the femoral centre of rotation, on the wear performance of a fixed-bearing total knee replacement through a combined experimental and computational approach. Studies were completed using conventional and moderately cross-linked polyethylene to determine whether the influence of these simulation input conditions varied with material. The position of the femoral centre of rotation and the input kinematics were shown to have a significant influence on the wear rates. Similar trends were shown for both the conventional and moderately cross-linked polyethylene materials, although lower wear rates were found for the moderately cross-linked polyethylene due to the higher level of cross-linking. The most important factor influencing the wear was the position of the relative contact point at the femoral component and tibial insert interface. This was dependent on the combination of input displacement magnitudes, waveforms, direction of motion and femoral centre of rotation. This study provides further evidence that in order to study variables such as design and material in total knee replacement, it is important to carefully control knee simulation conditions. This can be more effectively achieved through the use of displacement control simulation. |
| Databáze: | OpenAIRE |
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