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Scanning electron microscope and energy dispersive X-ray spectrometry studies on the material surface of extruded Polycel® ossicular prostheses

Published online by Cambridge University Press:  08 March 2006

Chul Ho Jang  and
Pa-Chun Wang
Chul Ho Jang
Affiliation:
Department of Otolaryngology, Wonkwang Medical School, Iksan, South Korea.
Pa-Chun Wang
Affiliation:
Department of Otolaryngology, Cathay General Hospital, Taipei, Taiwan.
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Abstract

Background: The cause of ossicular prosthesis extrusion remains an issue of interest to many otologists. This study evaluated the change in material surfaces and chemical elements of extruded total ossicular replacement prostheses (TORPs) and partial ossicular replacement prostheses (PORPs).

Methods: A total of nine extruded Polycel® ossicular prostheses (four TORPs, five PORPs) from nine patients was investigated using scanning electron microscope and energy dispersive X-ray spectrometry (EDX). Three prostheses (TORPs) obtained during revision surgery for hearing restoration were used as control subjects for EDX study.

Results: All subjects from the study group showed loss of fibrous capsule at both platform and shaft in the extruded prostheses. In comparison with the control group, the extruded prostheses had a lower level of carbon element (Wilcoxon signed-rank test, p < 0.05).

Conclusion: Loss of fibrous capsule and micro-degradation are probably two of the many factors that contribute to the extrusion of ossicular prostheses.

Keywords

Polycel®Ossicular ProsthesesScanning Electron MicroscopyEnergy Dispersive X-RaySpectrometry
Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 118 , Issue 11 , November 2004 , pp. 840 - 844
Copyright
© 2004 Royal Society of Medicine Press

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