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Patellofemoral kinematics during knee flexion-extension: an in vitro study.
J Orthop Res. 2006 Dec; 24(12):2201-11.JO

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.

Authors+Show Affiliations

Amis AA
Department of Mechanical Engineering, Imperial College London, London, United Kingdom. a.amis@imperial.ac.uk
Senavongse W
No affiliation info available
Bull AM
No affiliation info available

MeSH

AgedAged, 80 and overBiomechanical PhenomenaCadaverElectromagnetic PhenomenaFemurHumansIn Vitro TechniquesKnee JointMaleMiddle AgedMovementPatellaQuadriceps Muscle

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17004269

Citation

Amis, Andrew A., et al. "Patellofemoral Kinematics During Knee Flexion-extension: an in Vitro Study." Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society, vol. 24, no. 12, 2006, pp. 2201-11.
Amis AA, Senavongse W, Bull AM. Patellofemoral kinematics during knee flexion-extension: an in vitro study. J Orthop Res. 2006;24(12):2201-11.
Amis, A. A., Senavongse, W., & Bull, A. M. (2006). Patellofemoral kinematics during knee flexion-extension: an in vitro study. Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society, 24(12), 2201-11.
Amis AA, Senavongse W, Bull AM. Patellofemoral Kinematics During Knee Flexion-extension: an in Vitro Study. J Orthop Res. 2006;24(12):2201-11. PubMed PMID: 17004269.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Patellofemoral kinematics during knee flexion-extension: an in vitro study. AU - Amis,Andrew A, AU - Senavongse,Wongwit, AU - Bull,Anthony M J, PY - 2006/9/28/pubmed PY - 2006/12/29/medline PY - 2006/9/28/entrez SP - 2201 EP - 11 JF - Journal of orthopaedic research : official publication of the Orthopaedic Research Society JO - J Orthop Res VL - 24 IS - 12 N2 - 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. SN - 0736-0266 UR - https://www.unboundmedicine.com/medline/citation/17004269/Patellofemoral_kinematics_during_knee_flexion_extension:_an_in_vitro_study_ L2 - https://doi.org/10.1002/jor.20268 DB - PRIME DP - Unbound Medicine ER -