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TECHNICAL PAPERS: Joint/Whole Body

3D Finite Element Model of Meniscectomy: Changes in Joint Contact Behavior

[+] Author and Article Information
Barbara Zielinska

Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931

Tammy L. Haut Donahue1

Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931thdonahu@mtu.edu

1

Corresponding author.

J Biomech Eng 128(1), 115-123 (Sep 07, 2005) (9 pages) doi:10.1115/1.2132370 History: Received January 31, 2005; Revised September 07, 2005

The goal of this study is to quantify changes in knee joint contact behavior following varying degrees of the medial partial meniscectomy. A previously validated 3D finite element model was used to simulate 11 different meniscectomies. The accompanying changes in the contact pressure on the superior surface of the menisci and tibial plateau were quantified as was the axial strain in the menisci and articular cartilage. The percentage of medial meniscus removed was linearly correlated with maximum contact pressure, mean contact pressure, and contact area. The lateral hemi-joint was minimally affected by the simulated medial meniscectomies. The location of maximum strain and location of maximum contact pressure did not change with varying degrees of partial medial meniscectomy. When 60% of the medial meniscus was removed, contact pressures increased 65% on the remaining medial meniscus and 55% on the medial tibial plateau. These data will be helpful for assessing potential complications with the surgical treatment of meniscal tears. Additionally, these data provide insight into the role of mechanical loading in the etiology of post-meniscectomy osteoarthritis.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

FE model of a human knee

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Figure 2

Partial medial meniscectomies simulated in the model

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Figure 3

Contour plot of contact pressures on the superior surface of the lateral and medial meniscus following 30% posterior-central meniscectomy. Black bold line represents border of the contact area for intact case.

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Figure 4

Linear correlation between the maximum contact pressure and the percentage of removed tissue. (A) All experiments, (B) anterior-central group, (C) posterior-central group. A-anterior, C-central, P-posterior, I-intact.

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Figure 5

Linear correlation between the contact area and the percentage of removed tissue. (A) Anterior-central group-superior surface of the medial meniscus, (B) posterior-central-superior surface of the medial meniscus group, (C) Medial hemijoint of the tibia plateau. A-anterior, C-central, P-posterior, I-intact.

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Figure 6

Maximum contact pressure on the superior surface of the medial meniscus. (A) Anterior portion, (B) central portion, (C) posterior portion.

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Figure 7

Maximum axial strain on the superior surface of the medial meniscus

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Figure 8

(A) Contact force on the superior surface of the medial meniscus, (B) contact force on the tibia plateau—medial side

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