A new model to predict in vivo human knee kinematics under physiological-like muscle activation

Heller, Markus O.; König, Christian; Graichen, Heiko; Hinterwimmer, Stefan; Ehrig, Rainald; Duda, Georg N.; Taylor, William R.

doi:10.1016/j.jbiomech.2007.03.005

Cited by 18 publications

(10 citation statements)

References 44 publications

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“…Here, the kinematics of the limb play a key role. [21][22][23] Without a detailed comparison between model predictions and in vivo forces, it is difficult to unravel the complex interactions that govern the variation in the internal forces.…”

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confidence: 99%

“…[21][22][23]48 In previous studies, functional methods were crucial for accurate determination of joint centers and axes from skin marker based motion capture data. 23,[35][36][37]60 The artifact associated with skin marker type and placement plays an important role in the accuracy of assessing skeletal kinematics, even when using functional methods, and such approaches should be applied carefully.…”

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confidence: 99%

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Patellofemoral joint contact forces during activities with high knee flexion

Trepczynski

Kutzner

Kornaropoulos

et al. 2011

Journal Orthopaedic Research

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The patellofemoral (PF) joint plays an essential role in knee function, but little is known about the in vivo loading conditions at the joint. We hypothesized that the forces at the PF joint exceed the tibiofemoral (TF) forces during activities with high knee flexion. Motion analysis was performed in two patients with telemetric knee implants during walking, stair climbing, sit-to-stand, and squat. TF and PF forces were calculated using a musculoskeletal model, which was validated against the simultaneously measured in vivo TF forces, with mean errors of 10% and 21% for the two subjects. The in vivo peak TF forces of 2.9-3.4 bodyweight (BW) varied little across activities, while the peak PF forces showed significant variability, ranging from less than 1 BW during walking to more than 3 BW during high flexion activities, exceeding the TF forces. Together with previous in vivo measurements at the hip and knee, the PF forces determined here provide evidence that peak forces across these joints reach values of around 3 BW during high flexion activities, also suggesting that the in vivo loading conditions at the knee can only be fully understood if the forces at the TF and the PF joints are considered together. ß

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confidence: 99%

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confidence: 99%

Patellofemoral joint contact forces during activities with high knee flexion

Trepczynski

Kutzner

Kornaropoulos

et al. 2011

Journal Orthopaedic Research

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“…The goal was therefore to assess whether a new three-dimensional model of knee kinematics based on a modified four-bar linkage which could consider the cruciate ligament lengthening characteristics as well as tibiofemoral internal/external rotation, was capable of simulating the kinematics of the tibiofemoral joint during loaded and unloaded in vivo knee flexion. Furthermore, by extracting the parameter sets to reconstruct the known kinematics of all individuals, such a generic model has the ability of reconstructing the specific tibiofemoral kinematics [44].…”

Section: Three-dimensional Modelmentioning

confidence: 99%

“…Sagittal view of the tibia and the posterior cruciate ligament as reconstructed from the MRI data. A shift from a lax concave shape at 0°and almost straight at 30°a nd 90°can be seen, posing the question as to whether a linear four-bar linkage model is capable of modelling the kinematics of the knee [44]. The four-bar linkage model (solid bars) for describing the movement of the femur relative to the tibia is shown in Fig.…”

Section: Experimental Studymentioning

confidence: 99%

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Biomechanics of knee joint — A review

Madeti¹,

Rao

Pragada

2015

Front. Mech. Eng.

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The present paper is to know how the work is carried out in the field of biomechanics of knee. Various model formulations are discussed and further classified into mathematical model, two-dimensional model and three-dimensional model. Knee geometry is a crucial part of human body movement, in which how various views of knee is shown in different planes and how the forces act on tibia and femur are studied. It leads to know the forces acting on the knee joint. Experimental studies of knee geometry and forces acting on knee shown by various researchers have been discussed, and comparisons of results are made. In addition, static and dynamic analysis of knee has been also discussed respectively to some extent.

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Modulation of the Relationship Between External Knee Adduction Moments and Medial Joint Contact Forces Across Subjects and Activities

Trepczynski

Kutzner

Bergmann

et al. 2014

Arthritis & Rheumatology

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ObjectiveThe external knee adduction moment (EAM) is often considered a surrogate measure of the distribution of loads across the tibiofemoral joint during walking. This study was undertaken to quantify the relationship between the EAM and directly measured medial tibiofemoral contact forces (Fmed) in a sample of subjects across a spectrum of activities.MethodsThe EAM for 9 patients who underwent total knee replacement was calculated using inverse dynamics analysis, while telemetric implants provided Fmed for multiple repetitions of 10 activities, including walking, stair negotiation, sit-to-stand activities, and squatting. The effects of the factors “subject” and “activity” on the relationships between Fmed and EAM were quantified using mixed-effects regression analyses in terms of the root mean square error (RMSE) and the slope of the regression.ResultsAcross subjects and activities a good correlation between peak EAM and Fmed values was observed, with an overall R2 value of 0.88. However, the slope of the linear regressions varied between subjects by up to a factor of 2. At peak EAM and Fmed, the RMSE of the regression across all subjects was 35% body weight (%BW), while the maximum error was 127 %BW.ConclusionThe relationship between EAM and Fmed is generally good but varies considerably across subjects and activities. These findings emphasize the limitation of relying solely on the EAM to infer medial joint loading when excessive directed cocontraction of muscles exists and call for further investigations into the soft tissue–related mechanisms that modulate the internal forces at the knee.

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A new model to predict in vivo human knee kinematics under physiological-like muscle activation

Cited by 18 publications

References 44 publications

Patellofemoral joint contact forces during activities with high knee flexion

Patellofemoral joint contact forces during activities with high knee flexion

Biomechanics of knee joint — A review

Modulation of the Relationship Between External Knee Adduction Moments and Medial Joint Contact Forces Across Subjects and Activities

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