Partial meniscectomy is believed to change the biomechanics of the knee joint through alterations in the contact of articular cartilages and menisci. Although fluid pressure plays an important role in the load support mechanism of the knee, the fluid pressurization in the cartilages and menisci has been ignored in the finite element studies of the mechanics of meniscectomy. In the present study, a 3D fibril-reinforced poromechanical model of the knee joint was used to explore the fluid flow dependent changes in articular cartilage following partial medial and lateral meniscectomies. Six partial longitudinal meniscectomies were considered under relaxation, simple creep, and combined creep loading conditions. In comparison to the intact knee, partial meniscectomy not only caused a substantial increase in the maximum fluid pressure but also shifted the location of this pressure in the femoral cartilage. Furthermore, these changes were positively correlated to the size of meniscal resection. While in the intact joint, the location of the maximum fluid pressure was dependent on the loading conditions, in the meniscectomized joint the location was predominantly determined by the site of meniscal resection. The partial meniscectomy also reduced the rate of the pressure dissipation, resulting in even larger difference between creep and relaxation times as compared to the case of the intact knee. The knee joint became stiffer after meniscectomy because of higher fluid pressure at knee compression followed by slower pressure dissipation. The present study indicated the role of fluid pressurization in the altered mechanics of meniscectomized knees.
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e-mail: Leping.Li@ucalgary.ca
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February 2012
Research Papers
Partial Meniscectomy Changes Fluid Pressurization in Articular Cartilage in Human Knees
M. Kazemi,
M. Kazemi
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, N. W., Calgary, AB, T2N 1N4, Canada
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L. P. Li,
L. P. Li
Department of Mechanical and Manufacturing Engineering,
e-mail: Leping.Li@ucalgary.ca
University of Calgary
, 2500 University Drive, N. W., Calgary, AB, T2N 1N4, Canada
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M. D. Buschmann,
M. D. Buschmann
Institut de Génie Biomédical
, École Polytechnique de Montréal
, C. P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
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P. Savard
P. Savard
Institut de Génie Biomédical
, École Polytechnique de Montréal
, C. P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
Search for other works by this author on:
M. Kazemi
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, N. W., Calgary, AB, T2N 1N4, Canada
L. P. Li
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, N. W., Calgary, AB, T2N 1N4, Canada
e-mail: Leping.Li@ucalgary.ca
M. D. Buschmann
Institut de Génie Biomédical
, École Polytechnique de Montréal
, C. P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
P. Savard
Institut de Génie Biomédical
, École Polytechnique de Montréal
, C. P. 6079, succ. Centre-ville, Montréal, QC, H3C 3A7, Canada
J Biomech Eng. Feb 2012, 134(2): 021001 (10 pages)
Published Online: February 15, 2012
Article history
Received:
August 12, 2011
Revised:
December 23, 2011
Posted:
January 24, 2012
Published:
February 14, 2012
Online:
February 15, 2012
Citation
Kazemi, M., Li, L. P., Buschmann, M. D., and Savard, P. (February 15, 2012). "Partial Meniscectomy Changes Fluid Pressurization in Articular Cartilage in Human Knees." ASME. J Biomech Eng. February 2012; 134(2): 021001. https://doi.org/10.1115/1.4005764
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