RESEARCH ARTICLE
Knee Joint Loads and Surrounding Muscle Forces during Stair Ascent in Patients with Total Knee Replacement Robert Rasnick1, Tyler Standifird2, Jeffrey A. Reinbolt3, Harold E. Cates4, Songning Zhang1* 1 Department of Kinesiology, Recreation, & Sport Studies, The University of Tennessee, Knoxville, Tennessee, United States of America, 2 Department of Exercise Science & Outdoor Recreation, Utah Valley University, Orem, Utah, United States of America, 3 Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, Tennessee, United States of America, 4 Tennessee Orthopedic Clinics, Knoxville, Tennessee, United States of America * [email protected]
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OPEN ACCESS Citation: Rasnick R, Standifird T, Reinbolt JA, Cates HE, Zhang S (2016) Knee Joint Loads and Surrounding Muscle Forces during Stair Ascent in Patients with Total Knee Replacement. PLoS ONE 11 (6): e0156282. doi:10.1371/journal.pone.0156282 Editor: Miklos S. Kellermayer, Semmelweis University, HUNGARY Received: July 17, 2015 Accepted: May 11, 2016 Published: June 3, 2016 Copyright: © 2016 Rasnick et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Data Availability Statement: All relevant data are within the paper and its Supporting Information file. Funding: The authors received no specific funding for this work. Competing Interests: The authors have declared that no competing interests exist.
Abstract Total knee replacement (TKR) is commonly used to correct end-stage knee osteoarthritis. Unfortunately, difficulty with stair climbing often persists and prolongs the challenges of TKR patents. Complete understanding of loading at the knee is of great interest in order to aid patient populations, implant manufacturers, rehabilitation, and future healthcare research. Musculoskeletal modeling and simulation approximates joint loading and corresponding muscle forces during a movement. The purpose of this study was to determine if knee joint loadings following TKR are recovered to the level of healthy individuals, and determine the differences in muscle forces causing those loadings. Data from five healthy and five TKR patients were selected for musculoskeletal simulation. Variables of interest included knee joint reaction forces (JRF) and the corresponding muscle forces. A paired samples t-test was used to detect differences between groups for each variable of interest (p
Knee Joint Loads and Surrounding Muscle Forces during Stair Ascent in Patients with Total Knee Replacement Robert Rasnick1, Tyler Standifird2, Jeffrey A. Reinbolt3, Harold E. Cates4, Songning Zhang1* 1 Department of Kinesiology, Recreation, & Sport Studies, The University of Tennessee, Knoxville, Tennessee, United States of America, 2 Department of Exercise Science & Outdoor Recreation, Utah Valley University, Orem, Utah, United States of America, 3 Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, Tennessee, United States of America, 4 Tennessee Orthopedic Clinics, Knoxville, Tennessee, United States of America * [email protected]
a11111
OPEN ACCESS Citation: Rasnick R, Standifird T, Reinbolt JA, Cates HE, Zhang S (2016) Knee Joint Loads and Surrounding Muscle Forces during Stair Ascent in Patients with Total Knee Replacement. PLoS ONE 11 (6): e0156282. doi:10.1371/journal.pone.0156282 Editor: Miklos S. Kellermayer, Semmelweis University, HUNGARY Received: July 17, 2015 Accepted: May 11, 2016 Published: June 3, 2016 Copyright: © 2016 Rasnick et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Data Availability Statement: All relevant data are within the paper and its Supporting Information file. Funding: The authors received no specific funding for this work. Competing Interests: The authors have declared that no competing interests exist.
Abstract Total knee replacement (TKR) is commonly used to correct end-stage knee osteoarthritis. Unfortunately, difficulty with stair climbing often persists and prolongs the challenges of TKR patents. Complete understanding of loading at the knee is of great interest in order to aid patient populations, implant manufacturers, rehabilitation, and future healthcare research. Musculoskeletal modeling and simulation approximates joint loading and corresponding muscle forces during a movement. The purpose of this study was to determine if knee joint loadings following TKR are recovered to the level of healthy individuals, and determine the differences in muscle forces causing those loadings. Data from five healthy and five TKR patients were selected for musculoskeletal simulation. Variables of interest included knee joint reaction forces (JRF) and the corresponding muscle forces. A paired samples t-test was used to detect differences between groups for each variable of interest (p
