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Optical Engineering

Computer simulation of surface temperature profiles during CO2 laser irradiation of human enamel
Author(s): Duncan Yu; Jeffrey L. Fox; Jer Hsu; G. Lynn Powell; William I. Higuchi
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Paper Abstract

The surface temperature profiles of human enamel blocks following laser irradiation are examined using a mathematical model. A physical model for calculating this surface temperature is developed and then solved by the Laplace transform technique. The enamel block is modeled as a homogeneous cylinder in one dimension with the entire surface exposed to laser beam irradiation. Both the photon absorption/transmission and convective heat loss are taken into consideration in the proposed model. This model allows the surface temperature to be calculated under arbitrary combinations of laser wavelength, pulse pattern, and energy density. Results indicate that (1) surface temperature depends on the wavelength, energy density, and duration of the pulse; (2) high surface temperatures (~ 300°C) can be achieved with associated inside temperature changes of less than 5°C; and (3) the surface temperature depends strongly on the environmental heat transfer coefficients. These results will facilitate the rational development of lasers as potential tools in preventive dentistry.

Paper Details

Date Published: 1 February 1993
PDF: 8 pages
Opt. Eng. 32(2) doi: 10.1117/12.60752
Published in: Optical Engineering Volume 32, Issue 2
Show Author Affiliations
Duncan Yu, Univ. of Utah (United States)
Jeffrey L. Fox, Univ. of Utah (United States)
Jer Hsu, University of Utah (United States)
G. Lynn Powell, Univ. of Utah (United States)
William I. Higuchi, Univ. of Utah (United States)


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