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Proceedings Paper

Caries selective ablation: the handpiece
Author(s): Thomas Hennig; Peter Rechmann; Andreas Holtermann
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Paper Abstract

Caries selective ablation is fixed to a window of fluences predicted by the ablation thresholds of carious and healthy dentin, respectively. The aim of the study was to develop a dental handpiece which guarantees homogeneous fluence at the irradiated tooth surface. Furthermore the point of treatment should be cooled down without energy losses due to the cooling system. We suggest the direct coupling of the laser radiation into a laminar stream of liquid, which acts in turn as a lengthened beam guide. The impacts of the laser radiation and of the cooling medium fall exactly into the same point. Hot ablation debris is removed out of the crater by the flush of the water jet. Fluences are constant if the handpiece is used in contact mode or at a distance. Normally the surface of a bare fiber working in contact mode is destroyed after a few shots. Coupling the laser radiation into a stream of liquid prevents this destruction. Putting together the benefits of this special handpiece short overall treatment times seem to be possible. High average power can be applied to the tooth without the threat of thermal damage. Furthermore no time consuming cutting of the fiber prolongs the treatment time.

Paper Details

Date Published: 1 May 1995
PDF: 7 pages
Proc. SPIE 2394, Lasers in Dentistry, (1 May 1995); doi: 10.1117/12.207442
Show Author Affiliations
Thomas Hennig, Heinrich-Heine Univ./Institute of Laser Medicine (Germany)
Peter Rechmann, Heinrich-Heine Univ./Institute of Laser Medicine (Germany)
Heinrich-Heine Univ./School of Dentistry (Germany)
Andreas Holtermann, Heinrich-Heine Univ./Institute of Laser Medicine (Germany)
Heinrich-Heine Univ./School of Dentistry (Germany)


Published in SPIE Proceedings Vol. 2394:
Lasers in Dentistry
Harvey A. Wigdor; John D. B. Featherstone; Joel M. White, Editor(s)

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