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.
Zihlmann
Monika Silvia
MS
Laboratory for Biomechanics, Swiss Federal Institute of Technology, Zürich, Switzerland. mzihlmann@ethz.ch
Gerber
Hans
H
Stacoff
Alex
A
Burckhardt
Kathrin
K
Székely
Gábor
G
Stüssi
Edgar
E
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*