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Proceedings Paper

Transient FEM calculation of the ablation of hard dental tissue induced by Er:YAG laser radiation
Author(s): Hans-Jochen Foth; Manfred Lueke
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Paper Abstract

Three dimensional model calculations using Finite Elements were carried out to simulate the heat distribution under IR laser ablation. The thermodynamic constants of dentin were used for heat capacity, heat conductivity etc. Compared to earlier results, the anisotropy of these constants is now considered; i.e. the heat conduction for example is not necessarily independent of the direction but depends on the orientation of the inner structure of the dental tissue. While the results of CO2 laser ablation were discussed last year, new calculations have been performed for the optical constant of dentin at a wavelength of 2.9 micrometers . Since the penetration length of 2.9 micrometers radiation is significantly shorter than that of 10.6 micrometers , the thermally influenced zone around the laser crater is thinner.

Paper Details

Date Published: 3 June 2002
PDF: 8 pages
Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); doi: 10.1117/12.469304
Show Author Affiliations
Hans-Jochen Foth, Univ. of Kaiserslautern (Germany)
Manfred Lueke, Univ. of Kaiserslautern (Germany)

Published in SPIE Proceedings Vol. 4610:
Lasers in Dentistry VIII
Peter Rechmann D.D.S.; Daniel Fried; Thomas Hennig, Editor(s)

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