Mechanisms underpinning the peak knee flexion moment increase over 2-years following arthroscopic partial meniscectomy

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Hall, Michelle
Wrigley, Tim V
Metcalf, Ben R
Hinman, Rana S
Cicuttini, Flavia M
Dempsey, Alasdair R
Mills, Peter M
Lloyd, David G
Bennell, Kim L
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2015
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Abstract

Background: Knee osteoarthritis is common in people who have undergone partial meniscectomy, and a higher external knee flexion moment during gait may be a potential contributor. Although the peak external knee flexion moment has been shown to increase from 3 months to 2 years following partial meniscectomy, mechanisms underpinning the increase in the peak knee flexion moment are unknown. Methods: Sixty-six participants with partial meniscectomy completed three-dimensional gait (normal and fast pace) and quadriceps strength assessment at baseline (3 months following partial meniscectomy) and again 2 years later. Variables included external knee flexion moment, vertical ground reaction force, knee flexion kinematics, and quadriceps peak torque. Findings: For normal pace walking, the main significant predictors of change in peak knee flexion moment were an increase in peak vertical ground reaction force (R2 = 0.55), mostly due to an increase in walking speed, and increase in peak knee flexion angle (R2 = 0.19). For fast pace walking, the main significant predictors of change in peak knee flexion moment were an in increase in peak vertical ground reaction force (R2 = 0.51) and increase in knee flexion angle at initial contact (R2 = 0.17). Change in peak vertical force was mostly due to an increase in walking speed. Interpretation: Findings suggest that increases in vertical ground reaction force and peak knee flexion angle during stance are predominant contributors to the 2-year change in peak knee flexion moment. Future studies are necessary to refine our understanding of joint loading and its determinants following meniscectomy

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Clinical Biomechanics

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30

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10

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© 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.

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Biomedical engineering

Mechanical engineering

Sports science and exercise

Sports science and exercise not elsewhere classified

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