Three-dimensional kinematics and kinetics of total knee arthroplasty during level walking using single plane video-fluoroscopy and force plates: a pilot study.
The goal of the study was to simultaneously obtain accurate kinematic and kinetic data from a total knee arthroplasty (TKA) during level walking, by coupling force plate data with the kinematics of TKA measured by a movable video-fluoroscopic system. Kinematic and kinetic information of a TKA is crucial for the improvement of implant designs and for the increased longevity of the implant components. Instrumented gait analysis, with skin mounted marker tracking and force plates, is a well-established method for the acquisition of kinematic and kinetic data of TKA in vivo and for non-invasive estimation of joint function. However, resultant moments at the knee joint are inaccurate with this method, due to skin movement artifacts. Video-fluoroscopy reduces these inaccuracies by means of the direct tracking of the implant components with X-ray. However this measuring technique carries disadvantages: it provides only kinematic data, and the image intensifier covers a limited field of view. This paper presents a newly developed measuring technique, which enables a more accurate resultant moments calculation for level walking than could be achieved by conventional instrumented gait analysis.
Laboratory for Biomechanics, Swiss Federal Institute of Technology, Zürich, Switzerland. mzihlmann@ethz.ch
Monika Silvia
MS
Zihlmann
Hans
H
Gerber
Alex
A
Stacoff
Kathrin
K
Burckhardt
Gábor
G
Székely
Edgar
E
Stüssi
D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D002138:Calibration; D005471:Fluoroscopy; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D010865:Pilot Projects; D012399:Rotation; D014741:Video Recording; D016138:Walking / Q000502:physiology*