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Proceedings Paper

Characteristic changes of lased dentin
Author(s): Akira Senda; Osamu Matsui; Hisao Katada; Kazuari Kamiya; Akira Gomi
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Paper Abstract

The present study investigated the effect of CO2 laser irradiation on dentin underneath the carious dentin that is to be removed.The investigation consisted of two experiments. In the first experiment, morphological and elemental changes of extracted human dentin irradiated by the CO2 laser were observed by microscope, SEM and XMA. In the second experiment, changes in hardness of bovine dentin irradiated by the CO2 laser were examined. Panalas C10, a CO2 laser with a flexible optical fiber, was used with different total energies for both experiments. The present study showed that CO2 laser irradiation made a significantly harder arched layer underneath the superficial carbonized layer in dentin. It seemed that this harder layer occurred where the dentin tubules were plugged with particular structural elements, and where there was a high concentration of calcium and phosphorus. It is suggested that use of the CO2 laser irradiation to remove carious dentin may have an additional effect that enhances the mechanical and chemical properties of the dentin layer underneath the carious dentin.

Paper Details

Date Published: 17 April 1995
PDF: 6 pages
Proc. SPIE 1984, Advanced Laser Dentistry, (17 April 1995); doi: 10.1117/12.207020
Show Author Affiliations
Akira Senda, School of Dentistry/Aichi Gakuin Univ. (Japan)
Osamu Matsui, School of Dentistry/Aichi Gakuin Univ. (Japan)
Hisao Katada, School of Dentistry/Aichi Gakuin Univ. (Japan)
Kazuari Kamiya, School of Dentistry/Aichi Gakuin Univ. (Japan)
Akira Gomi, School of Dentistry/Aichi Gakuin Univ. (Japan)

Published in SPIE Proceedings Vol. 1984:
Advanced Laser Dentistry
Gregory B. Altshuler; Richard J. Blankenau D.D.S.; Harvey A. Wigdor D.D.S., Editor(s)

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