Quantifying Multidirectional Sliding Motions in Total Knee Replacements
Author:
Hamilton M. A.1, Sucec M. C.1, Fregly B. J.1, Banks S. A.12, Sawyer W. G.11
Affiliation:
1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611 2. Orthopaedic Research Lab, The Biomotion Foundation, Palm Beach, FL 33480
Abstract
This manuscript describes a formulaic method to predict the severity of crossing motions experienced by ultra-high-molecular-weight polyethylene (UHMWPE) under sliding conditions across a bearing surface. A statistical model for evaluating the distribution of sliding about this orientation is described. This model compares favorably to published experimental data on UHMWPE under multidirectional pin-on-disk testing. These algorithms are applied to the tibial component of a total knee replacement using patient-specific kinematics for gait and stair-rise activities collected using fluoroscopy. A dynamic contact model is used to calculate contact pressures and slip velocities on individual surface elements from this kinematic data. The most significant degree of crossing motion intensity was observed in the lateral compartments for both gait and stair-rise activities. This coincided with the location of maximum tribological intensity. The maximum crossing motions are characteristic of 4 and 9 deg of bidirectional crossing motion for gait and stair, respectively.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference27 articles.
1. Bragdon, C. R., O’Conner, D. O., Lowenstein, J. D., Jasty, M., and Syniuta, W. D., 1996, “The Importance of Multidirectional Motion on the Wear of Polyethylene,” IMechE Part H: Journal of Engineering in Medicine, 210, pp. 157–165. 2. Muratoglu, O. K., Bragdon, C. R., O’Connor, D. O., Jasty, M., Harris, W. H., Gul, R., and McGarry, F., 1999, “Unified Wear Model for Highly Crosslinked Ultra-High Molecular Weight Polyethylenes (Uhmwpe),” Biomaterials, 20, pp. 1463–1470. 3. Burroughs, B. R., and Blanchet, T. A., 2001, “Factors Affecting the Wear of Irradiated Uhmwpe,” Tribol. Trans., 44, pp. 215–223. 4. Wang, A.
, 2001, “A Unified Theory of Wear for Ultra-High Molecular Weight Polyethylene in Multi-Directional Sliding,” Wear, 248, pp. 38–47. 5. Maxian, T. A., Brown, T. D., Pedersen, D. R., and Callaghan, J. J., 1996, “3-Dimensional Sliding/Contact Computational Simulation of Total Hip Wear,” Clin. Orthop. Relat. Res., pp. 41–50.
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