Influence of the posterior cruciate ligament on kinematics of the knee during experimentally simulated clinical tests and activities of daily living

Moslemian, Alireza; Sidhu, Roger; Roessler, Philip P.; Wood, Ryan; Degen, Ryan M.; Getgood, Alan; Willing, Ryan

doi:10.1016/j.jbiomech.2020.110133

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…This system could survey the geometry of the sliding surface using force control of the robot arm. This robotic system has been improved, and many researchers developed several knee joint simulators (van de Bunt and Emanuel, 2017;Fitzpatrick et al, 2016;Moslemian et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Assessing the friction properties of synovial joint lubrication by tracking pendulum motion

Sakai

Todoh

2022

JBSE

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Osteoarthritis (OA) is the most common degenerative joint disease. In the advanced stages of OA, patients suffer from severe pain, functional limitations in the affected joints, and restriction of mobility. In the animal test to develop therapeutic agents of intra-articular injection for knee OA, it is important to understand the functional properties of synovial joints, and to establish precise measurement techniques. The pendulum test can mechanically evaluate the friction properties of joints. In this study, the frictional properties of the synovial joint were measured using a novel system based on the equation of motion for pendulum joint motion. It was hypothesized that the motion during the pendulum test included rotation motion and translation motion and that the instantaneous center of rotation changes occurred. It was also hypothesized that the coefficient of friction would fluctuate within one cycle in response to changes in the instantaneous center of rotation. To test these hypotheses, the motion of a rabbit knee joint was measured using a pendulum test with three laser displacement sensors, and the instantaneous center of rotation was calculated. It considered the fluctuation of the instantaneous center of rotation and measured the fluctuation of the coefficient of friction in one cycle using a novel calculation method. The trajectory of the instantaneous center of rotation was obtained, and changes in the motion phase were observed. The coefficients of friction were not uniform but were dependent on the phase of the joint motion. The coefficients of friction fluctuated significantly with a cycle of half of the joint motion.

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Section: Introductionmentioning

confidence: 99%

Assessing the friction properties of synovial joint lubrication by tracking pendulum motion

Sakai

Todoh

2022

JBSE

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Comparison of the Kinematics and Laxity of Total Knee Arthroplasty Bearing Designs Stabilized With Specimen-Specific Virtual Ligaments on a Joint Motion Simulator

Vakili,

Lanting,

Getgood

et al. 2024

Journal of Biomechanical Engineering

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A variety of total knee arthroplasty (TKA) designs offer increased congruency bearing options, primarily to compensate for a loss of posterior cruciate ligament (PCL) function. However, their efficacy in providing sufficient stability under different circumstances requires further investigation. The preclinical testing of prosthesis components on joint motion simulators is useful for quantifying how design changes affect joint stability. However, this type of testing may not be clinically relevant because surrounding ligaments are either ignored or greatly simplified. This study aimed to assess the kinematics and stability of TKA joints during various motions using condylar-stabilized (CS) bearings without a PCL versus cruciate-retaining (CR) bearings with an intact PCL. TKA prosthetic components were tested on a joint motion simulator while being stabilized with five different sets of specimen-specific virtual ligament envelopes. In comparison to CR knees, CS knees without a PCL exhibited a greater amount of posterior tibial displacement laxity, with a mean increase of 2.7±2.1 mm (p = 0.03). Additionally, significant differences were observed in the anterior–posterior kinematics of the knee joint during activities of daily living (ADL) between the two designs. These results were consistent with previous cadaveric investigations, which indicated that CS knees without a PCL are less resistant to posterior tibial displacement than CR knees with one. This study employing virtual ligaments confirms previous findings that the raised anterior lip of some CS bearings may not completely compensate for the absence of the PCL; however, as both studies used reduced joint contact forces, the contributions of this design feature may be attenuated.

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Modeling of the native knee with kinematic data derived from experiments using the VIVO™ joint simulator: a feasibility study

Henke,

Meier,

Ruehrmund

et al. 2024

BioMed Eng OnLine

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Background Despite advances in total knee arthroplasty, many patients are still unsatisfied with the functional outcome. Multibody simulations enable a more efficient exploration of independent variables compared to experimental studies. However, to what extent numerical models can fully reproduce knee joint kinematics is still unclear. Hence, models must be validated with different test scenarios before being applied to biomechanical questions. Methods In our feasibility study, we analyzed a human knee specimen on a six degree of freedom joint simulator, applying a passive flexion and different laxity tests with sequential states of ligament resection while recording the joint kinematics. Simultaneously, we generated a subject-specific multibody model of the native tibiofemoral joint considering ligaments and contact between articulating cartilage surfaces. Results Our experimental data on the sequential states of ligament resection aligned well with the literature. The model-based knee joint kinematics during passive flexion showed good agreement with the experiment, with root-mean-square errors of less than 1.61 mm for translations and 2.1° for knee joint rotations. During laxity tests, the experiment measured up to 8 mm of anteroposterior laxity, while the numerical model allowed less than 3 mm. Conclusion Although the multibody model showed good agreement to the experimental kinematics during passive flexion, the validation showed that ligament parameters used in this feasibility study are too stiff to replicate experimental laxity tests correctly. Hence, more precise subject-specific ligament parameters have to be identified in the future through model optimization.

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Influence of the posterior cruciate ligament on kinematics of the knee during experimentally simulated clinical tests and activities of daily living

Cited by 3 publications

References 41 publications

Assessing the friction properties of synovial joint lubrication by tracking pendulum motion

Assessing the friction properties of synovial joint lubrication by tracking pendulum motion

Comparison of the Kinematics and Laxity of Total Knee Arthroplasty Bearing Designs Stabilized With Specimen-Specific Virtual Ligaments on a Joint Motion Simulator

Modeling of the native knee with kinematic data derived from experiments using the VIVO™ joint simulator: a feasibility study

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