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Sensitivity of the knee joint kinematics calculation to selection of flexion axes.
J Biomech. 2004 Nov; 37(11):1743-8.JB

Abstract

Various flexion axes have been used in the literature to describe knee joint kinematics. This study measured the passive knee kinematics of six cadaveric human knee specimens using two widely accepted flexion axes; transepicondylar axis and the geometric center axis. These two axes were found to form an angle of 4.0 degrees +/- 0.8 degrees. The tibial rotation calculated using the transepicondylar axis was significantly different than the rotation obtained using the geometric center axis for the same knee motion. At 90 degrees of flexion, the tibial rotation obtained using the transepicondylar axis was 4.8 degrees +/- 9.4 degrees whereas the rotation recorded using the geometric center axis at the same flexion angle was 13.8 degrees +/- 10.2 degrees. At 150 degrees of knee flexion, the rotations obtained from the transepicondylar and the geometric center axes were 7.2 degrees +/- 5.7 degrees and 19.9 degrees +/- 6.9 degrees, respectively. The data suggest that a clear definition of the flexion axis is necessary when reporting knee joint kinematics.

Authors+Show Affiliations

Most E
Orthopedic Bioengineering Laboratory, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, GRJ 1215, Boston, MA 02114, USA.
Axe J
No affiliation info available
Rubash H
No affiliation info available
Li G
No affiliation info available

MeSH

Biomechanical PhenomenaCadaverHumansKnee JointRange of Motion, ArticularSensitivity and Specificity

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15388317

Citation

Most, E, et al. "Sensitivity of the Knee Joint Kinematics Calculation to Selection of Flexion Axes." Journal of Biomechanics, vol. 37, no. 11, 2004, pp. 1743-8.
Most E, Axe J, Rubash H, et al. Sensitivity of the knee joint kinematics calculation to selection of flexion axes. J Biomech. 2004;37(11):1743-8.
Most, E., Axe, J., Rubash, H., & Li, G. (2004). Sensitivity of the knee joint kinematics calculation to selection of flexion axes. Journal of Biomechanics, 37(11), 1743-8.
Most E, et al. Sensitivity of the Knee Joint Kinematics Calculation to Selection of Flexion Axes. J Biomech. 2004;37(11):1743-8. PubMed PMID: 15388317.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sensitivity of the knee joint kinematics calculation to selection of flexion axes. AU - Most,E, AU - Axe,J, AU - Rubash,H, AU - Li,G, PY - 2004/01/30/accepted PY - 2004/9/25/pubmed PY - 2005/1/28/medline PY - 2004/9/25/entrez SP - 1743 EP - 8 JF - Journal of biomechanics JO - J Biomech VL - 37 IS - 11 N2 - Various flexion axes have been used in the literature to describe knee joint kinematics. This study measured the passive knee kinematics of six cadaveric human knee specimens using two widely accepted flexion axes; transepicondylar axis and the geometric center axis. These two axes were found to form an angle of 4.0 degrees +/- 0.8 degrees. The tibial rotation calculated using the transepicondylar axis was significantly different than the rotation obtained using the geometric center axis for the same knee motion. At 90 degrees of flexion, the tibial rotation obtained using the transepicondylar axis was 4.8 degrees +/- 9.4 degrees whereas the rotation recorded using the geometric center axis at the same flexion angle was 13.8 degrees +/- 10.2 degrees. At 150 degrees of knee flexion, the rotations obtained from the transepicondylar and the geometric center axes were 7.2 degrees +/- 5.7 degrees and 19.9 degrees +/- 6.9 degrees, respectively. The data suggest that a clear definition of the flexion axis is necessary when reporting knee joint kinematics. SN - 0021-9290 UR - https://www.unboundmedicine.com/medline/citation/15388317/Sensitivity_of_the_knee_joint_kinematics_calculation_to_selection_of_flexion_axes_ DB - PRIME DP - Unbound Medicine ER -