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Proceedings Paper

The Measurement Of Total Joint Loosening By X-Ray Photogrammetry
Author(s): Frederick G. Lippert; Sandor A. Veress; Rama S. Tiwari; Richard M. Harrington
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Paper Abstract

Failure of total joint replacement due to loosening of the composents either between the implant and cement or between the cement and bone is emerging as a late complication with an incidence as high as 20 percent. Loosening may not only cause pain but progressive loss of support for the prosthesis with eventual structural failure. Early diagnosis is important so that revision may be carried when deterioration or pain occurs. No method is currently available which clearly establishes loosening at an early stage except surgical exploration. We have devised a method based on our in vivo photogrammetry studies of patellar tracking patterns using metallic markers placed in bone near both components of the total joint. Stereo x-rays taken with the joint loaded and unloaded are measured for relative motion between the implant and the metallic markers. Laboratory studies using prosthetic hip components mounted in plastic bone have revealed the ability of this method to detect pistoning movements as small as 80 microns. These findings were confirmed by physical measurements.

Paper Details

Date Published: 29 July 1980
PDF: 4 pages
Proc. SPIE 0166, NATO Symposium on Applications of Human Biostereometrics, (29 July 1980); doi: 10.1117/12.956934
Show Author Affiliations
Frederick G. Lippert, Veterans Administration Hospital (United States)
Sandor A. Veress, University of Washington (United States)
Rama S. Tiwari, University of Washington (United States)
Richard M. Harrington, Veterans Administration Hospital (United States)

Published in SPIE Proceedings Vol. 0166:
NATO Symposium on Applications of Human Biostereometrics
A. M. Coblentz; Robin E. Herron, Editor(s)

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