Patellofemoral Kinematics During Knee Flexion-extension: an in Vitro Study.
From: Department of Mechanical Engineering, Imperial College London, London, United Kingdom. a.amis@imperial.ac.uk
Journal of orthopaedic research : official publication of the Orthopaedic Research Society
- Publish Date: Dec 2006
- ISSN: 0736-0266
- Volume: 24
- Issue: 12
- Pages: 2201-11
- Medium: Print
- Language: English
- Citation (JAMA): Amis Andrew A, Senavongse Wongwit, Bull Anthony M J, et al. Patellofemoral Kinematics During Knee Flexion-extension: an in Vitro Study.. J. Orthop. Res. Dec 2006;24:2201-11
Abstract
The purpose of this work was to obtain kinematics data for the normal human patellofemoral joint in vitro. Eight fresh-frozen cadaver knees were used. The heads of the quadriceps were separated, and the knees mounted in a kinematics rig. The femoral axis was aligned with an electromagnetic transmitter. The six heads of the quadriceps, including vasti medialis and lateralis obliquus, were loaded via cables according to their physiological cross-sectional areas and orientations. Magnetic trackers were mounted on the patella and tibia. The knee was flexed-extended against the extending muscle action, and patellar tracking was measured in six degrees of freedom. As the knee flexed, the patella flexed by 0.7 times the tibiofemoral flexion angle. It also translated medially 4 mm to engage the trochlear groove at 20 degrees knee flexion, then translated to 7 mm lateral by 90 degrees knee flexion. The patella tilted progressively to 7 degrees lateral by 90 degrees knee flexion, and patellar medial-lateral rotation was usually less than 3 degrees. This is believed to be the first set of patellar tracking data obtained in both flexion and extension motion while the patella was acted on by a full set of quadriceps muscle tensions acting in physiological directions. These data may be used in future studies of the effects of pathologies on patellar tracking.
Mesh Headings (Keywords): Aged, Aged, 80 and over, Biomechanics, Cadaver, Electromagnetics, Femur, Humans, Knee Joint, Male, Middle Aged, Movement, Patella, Quadriceps Muscle
Check for Full Text / PubMed Unique Identifier (PMID): 17004269
This abstract is part of PubMed, a service of the U.S. National Library of Medicine. PubMed includes more than 17 million citations from MEDLINE and other life science journals for biomedical articles. See Copyright and Disclaimers.
Linked medical terms appearing on this page are added by Healia to help readers find more information and are not part of the original PubMed document.
The data herein was last updated on July 8th, 2008 and may not reflect the most current and accurate data available from NLM.