scholarly journals Evaluation of Anterior Cruciate Ligament Surgical Reconstruction Through Finite Element Analysis

2021 ◽  
Author(s):  
Konstantinos Risvas ◽  
Dimitar Stanev ◽  
Lefteris Benos ◽  
Konstantinos Filip ◽  
Dimitrios Tsaopoulos ◽  
...  
Keyword(s):  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Reference Model ◽  
Numerical Models ◽  
Cruciate Ligament ◽  
Surgical Techniques ◽  
Surgical Reconstruction ◽  
Modeling Framework ◽  
Element Analysis ◽  
Anterior Cruciate

Abstract Anterior Cruciate Ligament (ACL) tear is one of the most common knee injuries. The ACL reconstruction surgery aims to restore healthy knee function by replacing the injured ligament with a graft. Proper selection of the optimal surgery parameters is a complex task. To this end, we developed an automated modeling framework that accepts subject-specific geometries and produces finite element knee models incorporating different surgical techniques. Initially, we developed a reference model of the intact knee, validated with data provided by the OpenKnee project. This helped us evaluate the effectiveness of estimating ligament stiffness directly from MRI. Next, we performed a plethora of “what-if” simulations, comparing responses with the reference model. We found that a) increasing graft pretension and radius reduces relative knee displacement, b) the correlation of graft radius and tension should not be neglected, c) graft fixation angle of 20 degrees can reduce knee laxity, and d) single-versus double-bundle techniques demonstrate comparable performance in restraining knee translation. In most cases, these findings confirm reported values from comparative clinical studies. The numerical models are made publicly available, allowing for experimental reuse and lowering the barriers for meta-studies. The modeling approach proposed here can complement orthopedic surgeons in their decision-making.

scholarly journals Design of a new magnesium-based anterior cruciate ligament interference screw using finite element analysis

2020 ◽  
Vol 20 ◽  
pp. 25-30
Author(s):  
Jonquil R. Mau ◽  
Kevin M. Hawkins ◽  
Savio L.-Y. Woo ◽  
Kwang E. Kim ◽  
Matthew B.A. McCullough
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Interference Screw ◽  
Element Analysis ◽  
Anterior Cruciate

Biomechanical Evaluation of Different Techniques in Double Bundle Anterior Cruciate Ligament Reconstruction Using Finite Element Analysis

2012 ◽  
Vol 13 ◽  
pp. 55-68 ◽  
Author(s):  
Rong Ying Huang ◽  
Hong Guang Zheng ◽  
Qiang Xu
Keyword(s):  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Soft Tissues ◽  
Cruciate Ligament ◽  
Tibial Tunnel ◽  
Double Bundle ◽  
Rotational Stability ◽  
Single Bundle ◽  
Element Analysis ◽  
Anterior Cruciate

Anterior cruciate ligament injuries commonly in traffic accident, sports activities and extreme sports. Anterior cruciate ligament reconstruction is a common practice to help the patients restore the knee stability. However, there is no previous comparison study of single bundle reconstruction, double-femoral double-tibial tunnel reconstruction, single-femoral double-tibial tunnel reconstruction, and double-femoral single-tibial tunnel reconstruction with respect to biomechanical characteristics such as rotational stability, force and stress inside the ligament and grafts, stresses inside the soft tissues. In this study, we developed a pair of three-dimensional finite element models of a lower extremity including femur, tibia, fibula, cartilage, meniscus, and four major ligaments at 0°，25°，60° and 80°of knee flexion. Based on the intact models, single bundle reconstruction, double-femoral double-tibial tunnel reconstruction, single-femoral double-tibial tunnel reconstruction, and double-femoral single-tibial tunnel reconstruction models were also developed. Then, the anterior tibial translations, the forces and stresses inside the ACL and ACL replacements, as well as the stresses inside the menisci, femoral and tibial cartilage were predicted under a combined rotatory load of 10Nm valgus moment and 5 Nm internal torque, respectively using finite element analysis. The rotational stability, ligament forces and stresses in the menisci, femoral and tibial cartilage following double bundle augmentation were superior to the other reconstruction techniques, while there is little advantage in ligament stress compared to that of the single bundle reconstruction. We conclude that double-femoral double-tibial tunnel reconstruction may have advantages with regard to biomechanical characteristics such as rotational stability, force inside the ligament and grafts, stresses inside the soft tissues.

Failure Locus of the Anterior Cruciate Ligament Disruption at 25° Knee Flexion: 3D Finite Element Analysis

2010 ◽  
Author(s):  
Andrew Homyk ◽  
Paul K. Canavan ◽  
Alexander Orsi ◽  
Story Wibby ◽  
Nicholas Yang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Acl Injury ◽  
Element Analysis ◽  
Acl Injuries ◽  
Fea Model ◽  
Failure Locus ◽  
Anterior Cruciate

Anterior cruciate ligament (ACL) disruption is a common injury that is detrimental to an athlete’s quality of life. Determining the mechanisms that cause ACL injury is important in order to develop proper interventions. This study was conducted to provide insight into the specific knee orientations associated with ACL injuries. A failure locus for the ACL was developed by simulating multiple loading scenarios using a 3-D finite element analysis (FEA) model of the knee. The results indicated varus and valgus were more dominant to the ACL injury compared to femoral rotation. The order of MCL failure, ACL failure, and maximum meniscus stress was also determined with respect to time during loading. The results of this study could be used to develop training programs focused on the avoidance of the described combination of movements, which may lead to ACL injury.

Finite Element Analysis for Double Anterior Cruciate Ligament Reconstruction Analysis

2013 ◽  
Vol 404 ◽  
pp. 344-349
Author(s):  
Chen Ming Kuo ◽  
Gwo Chung Tsai ◽  
Wen Lin Yeh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Double Bundle ◽  
Interference Screw ◽  
Bone Tunnel ◽  
Element Analysis ◽  
Acl Graft ◽  
Anterior Cruciate

This paper will take five male patients who performed a double-bundle anterior cruciate ligament (ACL) reconstruction to do finite element analysis and compare the stress distributions with each other. In order to lead this paper to reality, a model of the original bone tunnel according to CT is created and transformed into a finite-element model based on the reverse engineering method. The double-bundle ACL graft in the bone tunnel simulates the interference screw which screwed the ACL under the limit of friction and fix of contact. The dynamic analysis is performed with the femur flexion-extension axis which is under the limit of a fixed rotation angle (100°) and two degrees of freedom of motion in flexion. In the postprocess, the ACL graft is divided into several parts to get the stress distribution which will be easily to discuss the results. The result shows that max stress can be found on the top of the ACL or at the start point of the ACL because of the fixed position of the interference screw. The stress in PL bundle is greater than the stress in AM bundle. The angle of flexion will affect the stress and the stress might be higher at a specific angle.

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