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Proceedings Paper

Bone microsurgery with IR lasers: a comparative study of thermal action at different wavelengths
Author(s): Valerio Romano; Regulo Rodriguez; Hans Joerg Altermatt; Martin Frenz; Heinz P. Weber
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Paper Abstract

The thermal response of cortical bone targets to fiber delivered pulses from free running Er:YAG and Ho:Tm:YAG lasers was investigated experimentally and theoretically and compared to histological and morphological findings. The temperatures found at the ablation sites were found to be markedly lower for the strongly absorbed 2.94 micrometers Er:YAG than for the 2.1 micrometers Ho:Tm:YAG pulses. Furthermore, the temporal behavior of the temperature underneath the ablation crater when using 2.1 micrometers pulses suggests that the absorption characteristics of the bone targets are irreversibly changed by the thermal action of the ablating pulse which leads to a significantly different ablation behavior of the first pulse compared to the following pulses. In contrast, at the Er:YAG wavelength the thermal response of the bone targets and the ablation behavior of the pulses were found to remain unchanged after multiple pulses.

Paper Details

Date Published: 1 February 1994
PDF: 11 pages
Proc. SPIE 2077, Laser Interaction with Hard and Soft Tissue, (1 February 1994); doi: 10.1117/12.168016
Show Author Affiliations
Valerio Romano, Univ. Bern (Switzerland)
Regulo Rodriguez, Univ. Bern (Switzerland)
Hans Joerg Altermatt, Univ. Bern (Switzerland)
Martin Frenz, Univ. Bern (Switzerland)
Heinz P. Weber, Univ. Bern (Switzerland)


Published in SPIE Proceedings Vol. 2077:
Laser Interaction with Hard and Soft Tissue
Martin J. C. van Gemert; Rudolf W. Steiner; Lars Othar Svaasand; Hansjoerg Albrecht, Editor(s)

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