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DETERMINATION OF THE STRESS OF ANTERIOR CRUCIATE LIGAMENT IN VARIOUS DEGREES OF KNEE FLEXION, COMPARISON OF NORMAL AND RECONSTRUCTED LIGAMENT

MOHAMMAD TAGHI KARIMI

https://orcid.org/0000-0001-6162-8131

Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran

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SAYED IMAN HOSSEINI

Department of Mechanical and Aerospace, Engineering Shiraz University of Technology, Shiraz, Iran

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YOUSEF BAZARGAN LARI

https://orcid.org/0000-0002-4287-5812

Department of Mechanical Engineering, Shiraz Branch, Islamic University, Shiraz, Iran

E-mail Address: bazarganlari@iaushiraz.ac.ir

E-mail Address: bazargan@shirazu.ac.ir

Corresponding author.

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https://doi.org/10.1142/S0219519421500226Cited by:0 (Source: Crossref)

Abstract

Background: Knee joint stability is enhanced by ligamentus structures such as anterior cruciate (ACL), posterior cruciate (PCL), medial collateral (MCL) and lateral collateral ligaments (LCL). Rupture of ACL is the most common knee injuries, especially in sport related activities. The aim of this study is to evaluate the stress developed in knee joint structures in various degrees of knee flexion in ACL ruptured compared to normal condition.

Method: CT scan images of knee joint were used to create 3d model of knee joint by use of Mimics software. Abaqus software was used to evaluate the stress developed in knee joint in normal and in ACL reconstructed conditions in various degrees of knee flexion.

Results: The stress developed in ACL and other knee joint structures increased significantly by increase in knee joint flexion. The stress of knee joint structures (especially in ACL) in ACL reconstructed condition was more than that of normal condition.

Conclusion: It is recommended to immobilize the knee joint in extension up to $1 5^{\circ}$ of knee flexion in those with ACL injuries. The stress of ACL increased due to an increase in tibia translation associated with knee flexion.

Keywords:

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