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Proceedings Paper

Computational modeling of ultrashort-pulse ablation of enamel
Author(s): Richard A. London; David S. Bailey; David A. Young; W. Edward Alley; Michael D. Feit; Alexander M. Rubenchik; Joseph Neev
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Paper Abstract

A computational model for the ablation of tooth enamel by ultra-short laser pulses is presented. The role of simulations using this model in designing and understanding laser drilling systems is discussed. Pulses of duration 300 fsec and intensity greater than 1012 W/cm2 are considered. Laser absorption proceeds via multi-photon initiated plasma mechanism. The hydrodynamic response is calculated with a finite difference method, using an equation of state constructed from thermodynamic functions including electronic, ion motion, and chemical binding terms. Results for the ablation efficiency are presented. An analytic model describing the ablation threshold and ablation depth is presented. Thermal coupling to the remaining tissue and long-time thermal conduction are calculated. Simulation results are compared to experimental measurements of the ablation efficiency. Desired improvements in the model are presented.

Paper Details

Date Published: 7 May 1996
PDF: 12 pages
Proc. SPIE 2681, Laser-Tissue Interaction VII, (7 May 1996); doi: 10.1117/12.239580
Show Author Affiliations
Richard A. London, Lawrence Livermore National Lab. (United States)
David S. Bailey, Lawrence Livermore National Lab. (United States)
David A. Young, Lawrence Livermore National Lab. (United States)
W. Edward Alley, Lawrence Livermore National Lab. (United States)
Michael D. Feit, Lawrence Livermore National Lab. (United States)
Alexander M. Rubenchik, Lawrence Livermore National Lab. (United States)
Joseph Neev, Beckman Laser Institute and Medical Clinic (United States)


Published in SPIE Proceedings Vol. 2681:
Laser-Tissue Interaction VII
Steven L. Jacques, Editor(s)

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