Kinematics of the Patellofemoral Joint

Eijden, T.M.G.J. van; Kouwenhoven, E.; Weijs, W.A.; Verburg, J.; Boer, W. D. A. M. de

doi:10.1007/978-94-011-7432-9_59

Cited by 2 publications

(3 citation statements)

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“…Our analysis of bending in the quadriceps tendonJpatellar ligament complex suggests that the suprapatella also reduces the amount of movement required at the junction of the patella with the quadriceps tendon during flexion and extension. In the human knee, which does not have a suprapatella, Eijden et al (1985) reported a change in angle of approximately 35" between the long axis of the quadriceps tendon and the long axis of the patella during flexion and extension. The comparable value for the rat is 68", 17" of which occur at the proximal end of the suprapatella.…”

Section: Discussionmentioning

confidence: 99%

Cell and matrix biology of the suprapatella in the rat: A structural and immunocytochemical study of fibrocartilage in a tendon subject to compression

1991

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The structure, ultrastructure, histochemistry, and immunohistochemistry of the suprapatella have been described in the rat. The suprapatella is a fibrocartilaginous sesamoid within the tendon of quadriceps femoris that articulates with the femoral condyles during flexion of the knee joint and reduces the amount of bending required at the tendon-bone junction. The cells of the suprapatella were much larger and more numerous than those in the associated tendon and were packed with vimentin-containing, intermediate filaments. The tendon cells contained far fewer filaments. The cells of both regions contained actin and tubulin. Histochemical and immunohistochemical studies showed that the suprapatellar cells were embedded in a matrix that is rich in chondroitin sulphate, but does not contain keratan or heparan sulphate. The fibrocartilage of the adjacent attachment zone of the quadriceps tendon also contained chondroitin sulphate, but in addition was rich in type II collagen. The structure of the suprapatella was similar to that of the fibrocartilaginous regions of tendons that pass around bony pulleys. However, there were differences in matrix composition that could reflect functional differences between the fibrocartilages.

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Section: Discussionmentioning

confidence: 99%

Cell and matrix biology of the suprapatella in the rat: A structural and immunocytochemical study of fibrocartilage in a tendon subject to compression

1991

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“…Patellofemoral mechanics. The patellar articulation ( Figure 1) was treated as a two-dimensional chain describing movement and force components in the sagittal plane (Van Eijden et al 1985); it consisted of patellar ligament, patella, quadriceps muscle and the patellofemoral articulating surfaces. Between these elements, forces were exerted.…”

Section: Methodsmentioning

confidence: 99%

“…There exists a complex mutual relationship between the mechanism of the patellar articulation and the wrapping movement of the distal part of the quadriceps muscle around the femur. Various anatomic parameters, notably the length of the patellar ligament and the dimensions of the patella, determine the mechanics of the patellar articulation (Van Eijden et al 1985, 1986). There is a lack of analytical models that incorporate both the morphology and movements and forces at different flexion-extension angles of the knee.…”

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confidence: 99%

Mechanics of the patellar articulation Effects of patellar ligament length studied with a mathematical model

Eijden

Kouwenhoven

Weijs

1987

Acta Orthopaedica Scandinavica

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We investigated the influence of the length of the patellar ligament on (1) the relative positions of the ligament, patella, and quadriceps tendon, (2) the location of the patellofemoral contact point, (3) the force of the quadriceps femoris muscle, and (4) the patellofemoral compression force for 0-120 degrees flexion-extension angles of the knee. For this purpose, we used a mathematical model, describing movements and forces in the sagittal plane. The anatomic parameters for the model were obtained from five autopsy knees. The patellar ligament length appeared to influence the mechanical behavior of the patellar articulation considerably. The magnitude of the induced changes was determined by the length of the ligament and by the flexion-extension angle of the knee.

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Kinematics of the Patellofemoral Joint

Cited by 2 publications

References 1 publication

Cell and matrix biology of the suprapatella in the rat: A structural and immunocytochemical study of fibrocartilage in a tendon subject to compression

Cell and matrix biology of the suprapatella in the rat: A structural and immunocytochemical study of fibrocartilage in a tendon subject to compression

Mechanics of the patellar articulation Effects of patellar ligament length studied with a mathematical model

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