scholarly journals The Effect of Patellar Tendon Release on the Characteristics of Patellofemoral Joint Squat Movement: A Simulation Analysis

2019 ◽  
Vol 9 (20) ◽  
pp. 4301 ◽  
Author(s):  
Jianping Wang ◽  
Yongqiang Yang ◽  
Dong Guo ◽  
Shihua Wang ◽  
Long Fu ◽  
...  
Keyword(s):  
Knee Joint ◽  
Patellar Tendon ◽  
Patellofemoral Joint ◽  
Simulation Analysis ◽  
Element Model ◽  
Human Knee ◽  
Lateral Tilt ◽  
Human Knee Joint ◽  
No Release ◽  
Knee Joint Surgery

Objectives: This paper studies the patellar tendon release’s effect on the movement characteristics of the artificial patellofemoral joint squat to provide reference data for knee joint surgery. Methods: Firstly, the dynamic finite element model of the human knee joint under squatting was established. Secondly, in the above no-release models, the release of 30% of the attachment area at the upper end, the lower end, or both ends of the patellar tendon were conducted, respectively. Then the simulations of all above four models were conducted. Finally, the results of the simulation were compared and analyzed. Results: The simulation results show that, after releasing the patellar tendon (compared with the no-release simulation’s results), the relative flexion, medial-lateral rotation, medial-lateral tilt, and superior-inferior shift of the patella relative to the femur increased; the medial-lateral shift and anterior-posterior shift of the patella relative to the femur decreased. Conclusion: In this paper, the maximum flexion angle of the patella increased after the patellar tendon being released (compared with the no-release model), which indicated that the mobility of knee joint was improved after the patellar tendon release. The simulation data in this paper can provide technical reference for total knee arthroplasty.

scholarly journals Effect of patellar tendon release on squatting characteristics of tibiofemoral joint after total knee arthroplasty: a simulation analysis

2020 ◽  
Author(s):  
Jian-ping Wang ◽  
Shihua Wang ◽  
Yongqiang Yang ◽  
Dong Guo ◽  
Jinlai Liu ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Patellar Tendon ◽  
Knee Arthroplasty ◽  
Simulation Analysis ◽  
External Rotation ◽  
Element Model ◽  
Tibiofemoral Joint ◽  
Human Knee Joint ◽  
No Release ◽  
Total Knee

Abstract BackgroundThe objective of this paper was to study the patellar tendon release’s effect on the squat movement characteristics of the tibiofemoral joint after TKA (total knee arthroplasty).MethodsThe dynamic FEM(finite element model) of the human knee joint with 30% release of the upper end, lower end and both ends of the patellar tendon after TKA was established respectively, and the knee tibiofemoral joint of the squat movement simulation analysis.ResultsThe results of simulation show that in the release of three different parts, comparing with the results of no release simulation, the average of lateral translation, superior translation, posterior translation, and the adduction of the femur relative to the tibia decreased by 20%, 17%, 17%, and 12%, respectively.ConclusionThe average of external rotation of the femur relative to the tibia increased 24%. By comparing the data after patellar tendon release and no release one, it can be concluded that the flexion degree of femur relative to the tibia was 4° on average more than no release. Moderate release of the patellar tendon during TKA surgery is beneficial to improve the range of motion (ROM) of the femur relative to the tibia.

Studying the Intact, ACL-Deficient and Reconstructed Human Knee Joint Using a Finite Element Model

2013 ◽  
Author(s):  
Achilles Vairis ◽  
Markos Petousis ◽  
George Stefanoudakis ◽  
Nectarios Vidakis ◽  
Betina Kandyla ◽  
...  
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Three Dimensional ◽  
Element Model ◽  
Human Knee ◽  
Mechanical Responses ◽  
Human Knee Joint ◽  
Calculated Load ◽  
Anterior Cruciate

The human knee joint has a three dimensional geometry with multiple body articulations that produce complex mechanical responses under loads that occur in everyday life and sports activities. Knowledge of the complex mechanical interactions of these load bearing structures is of help when the treatment of relevant diseases is evaluated and assisting devices are designed. The anterior cruciate ligament in the knee connects the femur to the tibia and is often torn during a sudden twisting motion, resulting in knee instability. The objective of this work is to study the mechanical behavior of the human knee joint in typical everyday activities and evaluate the differences in its response for three different states, intact, injured and reconstructed knee. Three equivalent finite element models were developed. For the reconstructed model a novel repair device developed and patented by the authors was employed. For the verification of the developed models, static load cases presented in a previous modeling work were used. Mechanical stresses calculated for the load cases studied, were very close to results presented in previous experimentally verified work, in both load distribution and maximum calculated load values.

3-D BIODYNAMIC CONSTRAINT CONDITIONS WITH THREE SEGMENTS AND TWO ARTICULATING JOINTS ON THE HUMAN KNEE

2002 ◽  
Vol 14 (05) ◽  
pp. 183-188
Author(s):  
XISHI WANG ◽  
LI-QUN ZHANG
Keyword(s):  
Knee Joint ◽  
Lower Extremity ◽  
Patellofemoral Joint ◽  
Single Point ◽  
Point Contact ◽  
The Other ◽  
Human Knee ◽  
Human Knee Joint ◽  
Constraint Modeling ◽  
Biodynamic Modeling

In the paper, the 3-D biodynamic constraint conditions with three-segments (femur-patella-tibia) and two articulating joints (patellofemoral joint and tibiaofemoral joint) on the human knee are established. These constraint conditions of motion accommodate two situations: a two-point and a single-point contact on the patellofemoral joint and tibiaofemoral joint. On the other word, the present constraint modeling includes both rolling and sliding motions between the patella-femoral joint and tibia-femoral joint. This study can be explored a realistically 3-D biodynamic modeling of the human knee joint or human lower extremity.

Using a Biphasic Finite Element Model of the Human Knee Joint to Identify Robust Designs for a Meniscal Substitute

2013 ◽  
Author(s):  
Erin R. Leatherman ◽  
Hongqiang Guo ◽  
Suzanne A. Maher ◽  
Thomas J. Santner
Keyword(s):  
Knee Joint ◽  
Treatment Options ◽  
Element Model ◽  
Cross Sectional ◽  
Human Knee ◽  
Robust Designs ◽  
Human Knee Joint ◽  
The Us ◽  
Wedge Shape ◽  
Biphasic Finite Element

The menisci of the knee are C-shaped fibrocartilage disks with a cross-sectional wedge-shape that occupy the periphery of the knee joint. Although surgical treatment of the damaged meniscus is the most commonly performed orthopaedic procedure in the US, surprisingly few treatment options exist. This is in part because the structural properties of a meniscal substitute required to ensure function across a wide patient population has not been established.

scholarly journals Evaluation of a posterior cruciate ligament deficient human knee joint finite element model

2014 ◽  
Vol 2014 (1) ◽  
pp. 21 ◽  
Author(s):  
Achilles Vairis ◽  
Markos Petousis ◽  
Nectarios Vidakis ◽  
Betina Kandyla ◽  
Andreas-Marios Tsainis
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
Finite Element Model ◽  
Posterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Element Model ◽  
Human Knee ◽  
Human Knee Joint

Evaluation of an intact, an ACL-deficient, and a reconstructed human knee joint finite element model

2015 ◽  
Vol 19 (3) ◽  
pp. 263-270 ◽  
Author(s):  
Achilles Vairis ◽  
George Stefanoudakis ◽  
Markos Petousis ◽  
Nectarios Vidakis ◽  
Andreas-Marios Tsainis ◽  
...  
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
Finite Element Model ◽  
Element Model ◽  
Human Knee ◽  
Human Knee Joint ◽  
Acl Deficient

Development of a 3-D Non-Linear Finite Element Model of Human Knee Joint

2002 ◽  
Author(s):  
Yuhua Song ◽  
Richard E. Debski ◽  
Jorge Gil ◽  
Savio L.-Y. Woo
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
Soft Tissues ◽  
Cruciate Ligament ◽  
Element Model ◽  
Fe Model ◽  
Full Extension ◽  
Human Knee ◽  
Human Knee Joint ◽  
Non Linear

A 3-D finite element (FE) model of the knee is needed to more accurately analyze the kinematics of a knee joint as well as the function of various soft tissues such as ligaments. The data obtained can provide a better understanding of mechanisms of injury and offer valuable information for ligament reconstruction and rehabilitation protocols. The objective of this study was to develop a 3-D non-linear FE model of a human knee and determine its kinematics and the force and stress distributions within the anterior cruciate ligament (ACL) in response to anterior tibial loads at full extension. This model was validated by comparing the computed results to data obtained experimentally by a Robotic/UFS testing system [1].

A Validated Three-Dimensional Computational Model of a Human Knee Joint

1999 ◽  
Vol 121 (6) ◽  
pp. 657-662 ◽  
Author(s):  
G. Li ◽  
J. Gil ◽  
A. Kanamori ◽  
S. L.-Y. Woo
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Knee Joint ◽  
Three Dimensional ◽  
Optimization Procedure ◽  
Element Model ◽  
Joint Model ◽  
Equivalent Resistance ◽  
Human Knee ◽  
Human Knee Joint

This paper presents a three-dimensional finite element tibio-femoral joint model of a human knee that was validated using experimental data. The geometry of the joint model was obtained from magnetic resonance (MR) images of a cadaveric knee specimen. The same specimen was biomechanically tested using a robotic/universal force-moment sensor (UFS) system and knee kinematic data under anterior-posterior tibial loads (up to 100 N) were obtained. In the finite element model (FEM), cartilage was modeled as an elastic material, ligaments were represented as nonlinear elastic springs, and menisci were simulated by equivalent-resistance springs. Reference lengths (zero-load lengths) of the ligaments and stiffness of the meniscus springs were estimated using an optimization procedure that involved the minimization of the differences between the kinematics predicted by the model and those obtained experimentally. The joint kinematics and in-situ forces in the ligaments in response to axial tibial moments of up to 10 Nm were calculated using the model and were compared with published experimental data on knee specimens. It was also demonstrated that the equivalent-resistance springs representing the menisci are important for accurate calculation of knee kinematics. Thus, the methodology developed in this study can be a valuable tool for further analysis of knee joint function and could serve as a step toward the development of more advanced computational knee models.

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