Comparison of static and dynamic knee kinematics during squatting

Mu, Shang; Morooka, Tatsuya; Johal, P.; Hamai, Satoshi; Freeman, Michael; Banks, Scott A.

doi:10.1016/j.clinbiomech.2010.08.006

Cited by 32 publications

(18 citation statements)

References 9 publications

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“…On the other hand, Pinskerova et al [9] used the centers of the posterior circular portions of the medial and lateral femoral condyles (termed the Flexion Facet Centers) and reported that the medial condyle moved back 8 mm and the lateral 5 mm from 120° to 160°. Variations in the anteroposterior translations could be explained by different anatomic coordinate systems, activity, and foot position [3, 5, 13]. …”

Section: Resultsmentioning

confidence: 99%

In VivoHealthy Knee Kinematics during Dynamic Full Flexion

Hamai

Morooka

Dunbar

et al. 2013

BioMed Research International

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Healthy knee kinematics during dynamic full flexion were evaluated using 3D-to-2D model registration techniques. Continuous knee motions were recorded during full flexion in a lunge from 85° to 150°. Medial and lateral tibiofemoral contacts and femoral internal-external and varus-valgus rotations were analyzed as a function of knee flexion angle. The medial tibiofemoral contact translated anteroposteriorly, but remained on the center of the medial compartment. On the other hand, the lateral tibiofemoral contact translated posteriorly to the edge of the tibial surface at 150° flexion. The femur exhibited external and valgus rotation relative to the tibia over the entire activity and reached 30° external and 5° valgus rotations at 150° flexion. Kinematics' data during dynamic full flexion may provide important insight as to the designing of high-flexion total knee prostheses.

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Section: Resultsmentioning

confidence: 99%

In VivoHealthy Knee Kinematics during Dynamic Full Flexion

Hamai

Morooka

Dunbar

et al. 2013

BioMed Research International

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“…The minimal medial femoral condyle motion during flexion was also reported using sagittal plane fluoroscopy. 26 The observation on lager lateral femoral condyle motions than medial side resulted in a tibial internal rotation with flexion around an axis located at the medial side of the knee that led to the concept of medial-pivoting of the knee during flexion. 18, 24, 25 …”

Section: Discussionmentioning

confidence: 99%

Kinematic characteristics of the tibiofemoral joint during a step-up activity

Hosseini

Cancre

et al. 2013

Gait & Posture

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The step-up activity (stair-ascending) is an important daily function of the knee. This study aimed to investigate the articular cartilage contact kinematics on both tibial and femoral cartilage surfaces and describe the femoral condylar motion using the transepicondylar axis (TEA) and the geometric center axis (GCA) during a step-up activity. Twenty-one healthy subjects were included and their knee joint models were reconstructed using MR images. A single-stair step-up activity was imaged using a dual-fluoroscopic imaging system. Three-dimensional knee joint contact points were determined and projected onto the tibial plateau and femoral condyle surfaces. The contact points on the medial and lateral tibial plateau moved anteriorly (by 13.5 ± 3.2 and 10.7 ± 5.0 mm, respectively, p>0.05) with knee extension. The contact points on the medial and lateral femoral condyle moved from the posterior to the anterior portion (by 32.2 ± 4.9 mm and 25.5 ± 4.2 mm, respectively, p<0.05) and were located on the inner half of the femoral cartilage throughout the activity. The data on articular contact kinematics and the femoral condylar motion described using the TEA and GCA indicated that the medial and lateral compartments had similar motion patterns during the step-up activity. The knee does not demonstrate a medial-pivoting motion character during the step-up activity. The data may provide insight to contemporary TKA development.

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“…However, as Mu et al 50 report, there is no significant difference between kinematic patterns measured by static or dynamic simulation. The amount of IE rotation achieved for high flexion activities is in agreement with what has been reported for 0°-120°of flexion of the healthy normal knee joints by Mu et al 50 and Qi et al 51 Analysis of the effect of the shear forces in AP and ML directions on the behavior of the implant under high flexion knee bend activity shows that even when the shear forces are ignored in the simulation, the general pattern of motion of the implant is in agreement with the desired target kinematics. Only an average deviation of 0.32°6 0.34°and 0.3 6 0.3 mm is observed, respectively, for IE rotation angle of the tibia and the AP distance of the lateral center to the tibia posterior cortex.…”

Section: Discussionmentioning

confidence: 84%

Design and virtual evaluation of a customized surface-guided knee implant

Pejhan

Bohm

Brandt

et al. 2016

Proc Inst Mech Eng H

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Although total knee arthroplasty is generally a successful operation, many studies have shown that it results in significant alterations in the kinematics of the joint, which cause limitations in performing the activities of daily living. This study aimed to define the design features for a customized surface-guided total knee replacement and to evaluate the kinematic outcomes. Magnetic resonance imaging data of the knee joint are used to generate the design features as they relate to the functionality of the implant. The motion is guided by considering a partial ball and socket configuration on the medial condyle and varying radii of curvature on the lateral articulating surface. A virtual simulation of the behavior of the surface-guided total knee replacement was performed to investigate the motion patterns of this total knee replacement under gait and squatting loading conditions. Results of the virtual simulation show that flexion and extension of the knee make the center of the lateral condyle move more naturally in the posterior and anterior directions, in comparison to the center of the medial condyle. Such guidance is achieved as a result of the novel customized designed contact between the articulating surfaces. The proposed customized surface-guided total knee replacement provides patterns of motion close to the expected more natural target, not only during a gait cycle but also as the knee flexes to higher degrees during squatting. Major design features include location and orientation of the flexion and pivoting axes, the trace of the contact points on the tibia, and the radii of the guiding arcs on the lateral condyle.

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Comparison of static and dynamic knee kinematics during squatting

Cited by 32 publications

References 9 publications

In VivoHealthy Knee Kinematics during Dynamic Full Flexion

In VivoHealthy Knee Kinematics during Dynamic Full Flexion

Kinematic characteristics of the tibiofemoral joint during a step-up activity

Design and virtual evaluation of a customized surface-guided knee implant

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