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Proceedings Paper

Caries selective ablation: temperature in the pulp chamber
Author(s): Thomas Hennig; Peter Rechmann D.D.S.; Andreas Holtermann; Rolf Dramburg
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Paper Abstract

Preparing teeth the operating speed of laser systems is limited by the temperature increase at the pulp. In dentin the absorbed energy generated by a caries selective laser system working in the subthreshold fluence range for healthy dentin is converted nearly by 100% into heat. This heat is partly transferred to the pulp and endangers the vitality of the pulp. The aim of our measurements was to determine the temperature increase in the pulp chamber as a function of dentin thickness between the lasering point and the pulp chamber. The caries selective conditions were produced by a frequency doubled Alexandrite-laser (wavelength 377 nm, fluence 2 Jcm-2). Freshly extracted, sound human teeth were cut into slices ranging from 0.1 mm to 2 mm in thickness. A miniature bead thermistor measured the temperature on the pulpal side of the tooth slice in corresponding position to the irradiating fiber. Reducing the thickness of the remaining dentin results in an exponential increase of temperature. We examined the influence of fluence and pulse repetition rate on the temperature in the pulp chamber.

Paper Details

Date Published: 7 September 1994
PDF: 6 pages
Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184923
Show Author Affiliations
Thomas Hennig, Heinrich Heine Univ. Institute of Laser Medicine (Germany)
Peter Rechmann D.D.S., Heinrich Heine Univ. School of Dentistry (United States)
Andreas Holtermann, Heinrich Heine Univ. School of Dentistry (Germany)
Rolf Dramburg, Heinrich Heine Univ. Institute of Laser Medicine (Germany)


Published in SPIE Proceedings Vol. 2128:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV
R. Rox Anderson M.D.; R. Rox Anderson M.D., Editor(s)

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