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Proceedings Paper

Deformation measurement of the bone fixed with external fixator using holographic interferometry
Author(s): Arata Kojima; Ryokei Ogawa; N. Izuchi; Manabu Yamamoto; T. Nishimoto; Toshiro Matsumoto
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Paper Abstract

Mechanical properties of tibia fixed with an external fixative device (external fixator) were investigated under some simulated loading conditions. Deformation measurements were performed using double exposure holographic interferometry and real-time holographic interferometry. According to the results of the holographic interferometry, strains on the fixation pins and rods were also measured using strain gauges. The results showed that, with most types of external fixator, dislocations of both fractured ends were mainly caused by decrease in strength of the fixation pins. With increase in strength of fixation pins, angular deformation of the rod was more obvious. Increase in the strength of the rod was not always effective in decreasing dislocation of both fractured ends. Changes in bracing technique with marked change in rigidity of external fixator were useful to decrease dislocation of both fractured ends.

Paper Details

Date Published: 1 August 1991
PDF: 10 pages
Proc. SPIE 1429, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine, (1 August 1991); doi: 10.1117/12.44664
Show Author Affiliations
Arata Kojima, Kansai Medical Univ. (Japan)
Ryokei Ogawa, Kansai Medical Univ. (Japan)
N. Izuchi, Kansai Medical Univ. (Japan)
Manabu Yamamoto, Kansai Medical Univ. (Japan)
T. Nishimoto, Kansai Medical Univ. (Japan)
Toshiro Matsumoto, Osaka Prefectural Technical College (Japan)

Published in SPIE Proceedings Vol. 1429:
Holography, Interferometry, and Optical Pattern Recognition in Biomedicine
Halina Podbielska, Editor(s)

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