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Proceedings Paper

Caries selective ablation by pulsed lasers
Author(s): Thomas Hennig; Peter Rechmann; Christian G. Pilgrim; Hans-Joachim Schwarzmaier; Raimund Kaufmann
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Paper Abstract

The aim of the study was to find conditions for selective ablation of carious dentine. Absorption characteristics of healthy enamel, dentine, and carious lesions were studied by means of microspectrophotometry. It was found that in the spectral range of 330 to 520 nm optical density of carious dentine is higher by about a factor of 4 as in respect to healthy dentine. In the second part of the study, ablation thresholds were studied for different tissues at 355 nm (frequency tripled Q-switched Nd:YAG-Laser). By means of a piezoelectric detector, ultrasonic waves generated by ablation and subthreshold thermoelastic mechanisms were detected. Employing a fiber-optic delivery system, selective ablation of carious dentine occurred for pulse energies exceeding 0.4 Jcm-2 up to 1.2 Jcm-2.

Paper Details

Date Published: 1 May 1991
PDF: 7 pages
Proc. SPIE 1424, Lasers in Orthopedic, Dental, and Veterinary Medicine, (1 May 1991); doi: 10.1117/12.43995
Show Author Affiliations
Thomas Hennig, Heinrich Heine Univ. (Germany)
Peter Rechmann, Heinrich Heine Univ. (Germany)
Christian G. Pilgrim, Heinrich Heine Univ. (Germany)
Hans-Joachim Schwarzmaier, Heinrich Heine Univ. (Germany)
Raimund Kaufmann, Heinrich Heine Univ. (Germany)

Published in SPIE Proceedings Vol. 1424:
Lasers in Orthopedic, Dental, and Veterinary Medicine
Stephen J. O'Brien; Douglas N. Dederich; Harvey Wigdor; Ava Micky Trent, Editor(s)

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