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In vivo kinematics of the extensor mechanism of the knee during deep flexion.
- Source :
-
Journal of biomechanical engineering [J Biomech Eng] 2013 Aug; Vol. 135 (8), pp. 81002. - Publication Year :
- 2013
-
Abstract
- While various factors have been assumed to affect knee joint biomechanics, few data have been reported on the function of the extensor mechanism in deep flexion of the knee. This study analyzed the patellofemoral joint contact kinematics and the ratio of the quadriceps and patellar tendon forces in living subjects when they performed a single leg lunge up to 150 deg of flexion. The data revealed that in the proximal-distal direction, the patellofemoral articular contact points were in the central one-third of the patellar cartilage. Beyond 90 deg of flexion, the contact points moved towards the medial-lateral edges of the patellar surface. At low flexion angles, the patellar tendon and quadriceps force ratio was approximately 1.0 but reduced to about 0.7 after 60 deg of knee flexion, implying that the patella tendon carries lower loads than the quadriceps. These data may be valuable for improvement of contemporary surgical treatments of diseased knees that are aimed to achieve deep knee flexion.
- Subjects :
- Adult
Biomechanical Phenomena
Biomedical Engineering
Cartilage, Articular physiology
Female
Humans
Knee Joint anatomy & histology
Knee Prosthesis
Male
Middle Aged
Models, Anatomic
Models, Biological
Patellofemoral Joint anatomy & histology
Patellofemoral Joint physiology
Quadriceps Muscle anatomy & histology
Quadriceps Muscle physiology
Young Adult
Knee Joint physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1528-8951
- Volume :
- 135
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Journal of biomechanical engineering
- Publication Type :
- Academic Journal
- Accession number :
- 23719832
- Full Text :
- https://doi.org/10.1115/1.4024284