JMEDwear2005 - 1st Reading 13:26 WSPC/170-JMMB 1 3 00158...

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1 st Reading September 13, 2005 13:26 WSPC/170-JMMB 00158 Journal of Mechanics in Medicine and Biology 1 Vol. 5, No. 3 (2005) 1–7 c ± World ScientiFc Publishing Company 3 BIOMECHANICAL MECHANISMS FOR DAMAGE: RETRIEVAL ANALYSIS AND COMPUTATIONAL WEAR 5 PREDICTIONS IN TOTAL KNEE REPLACEMENTS MELINDA K. HARMAN 7 Orthopaedic Research Laboratory, The BioMotion Foundation P.O. Box 248, Palm Beach, Florida, 33480-0248 USA 9 [email protected] SCOTT A. BANKS 11 Orthopaedic Research Laboratory, The BioMotion Foundation P.O. Box 248, Palm Beach, Florida, 33480-0248 USA 13 Department of Mechanical and Aerospace Engineering, University of Florida P.O. Box 116250, Gainesville, Florida 32611-6250 USA 15 BENJAMIN J. ±REGLY and W. GREGORY SAWYER Department of Mechanical and Aerospace Engineering, University of Florida 17 P.O. Box 116250, Gainesville, Florida 32611-6250 USA W. ANDREW HODGE 19 Orthopaedic Research Laboratory, The BioMotion Foundation P.O. Box 248, Palm Beach, Florida, 33480-0248 USA 21 Accepted 1 January 2005 Damage patterns on the articular surface of the proximal tibia, including cartilage degen- 23 eration in osteoarthritic knees and damage of polyethylene knee prostheses after total knee replacement, provide information related to knee joint biomechanics and damage 25 mechanisms at the articular surface. This study reports articular damage patterns and knee kinematics assessed in the knees of older subjects, before and after total knee 27 replacement. The damage patterns are used to evaluate computational dynamic contact and tribological models that predict polyethylene damage in a patient-speciFc total knee 29 replacement model. Keywords : ±luoroscopy; polyethylene wear; dynamic contact; total knee replacement. 31 1. Introduction Knee motion, tibial-femoral contact mechanics and loading conditions contribute 33 to cartilage degeneration in osteoarthritic knees and polyethylene damage after Corresponding author. 1
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1 st Reading September 13, 2005 13:26 WSPC/170-JMMB 00158 2 M. K. Harman et al. total knee replacement (TKR). Therefore, evaluation of damage patterns occurring 1 on the articular surface of the proximal tibia can provide insight into the biome- chanical function of the knee and mechanisms by which damage occurs. This study 3 reports articular damage and knee kinematics assessed in the knees of older subjects before and after TKR. The goal is to understand the relationships between tibial 5 articular damage and ligament laxity, knee kinematics, and tibial-femoral contact. Damage patterns are used to evaluate computational dynamic contact and tribo- 7 logical models that predict polyethylene damage in a patient-speciFc TKR model (±ig. 1) 9 2. Methods All portions of this study involving human subjects were approved by an Institu- 11 tional Review Board. 2.1.
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This note was uploaded on 08/22/2011 for the course EGM 4313 taught by Professor Mei during the Spring '08 term at University of Florida.

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JMEDwear2005 - 1st Reading 13:26 WSPC/170-JMMB 1 3 00158...

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