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Research Papers

Optothermal transfer simulation in laser-irradiated human dentin

[+] Author Affiliations
Eduardo H. Moriyama, Renato A. Zangaro, Paulo D. C. Lobo, Antonio Balbin Villaverde, Marcos T. Pacheco

Universidade do Vale do Parai´ba, Instituto de Pesquisa e Desenvolvimento, Av Shishima Hifumi 2911 Urbanova, Sa˜o Jose´ dos Campos, SP Brazil E-mail: emoriyam@uhnres.utoronto.ca

Ii-Sei Watanabe

Universidade de Sa˜o Paulo, Departamento de Anatomia, Instituto de Cie?ncias Biome´dicas, Av Lineu Prestes 1730, SP-Brazil

Alex Vitkin

University of Toronto, Ontario Cancer Institute, 610 University Avenue, Toronto, Ontario, M5G 2M9 Canada

J. Biomed. Opt. 8(2), 298-302 (Apr 01, 2003). doi:10.1117/1.1560000
History: Received May 29, 2002; Revised Oct. 25, 2002; Accepted Nov. 28, 2002; Online April 01, 2003
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Laser technology has been studied as a potential replacement to the conventional dental drill. However, to prevent pulpal cell damage, information related to the safety parameters using high-power lasers in oral mineralized tissues is needed. In this study, the heat distribution profiles at the surface and subsurface regions of human dentine samples irradiated with a Nd:YAG laser were simulated using Crank-Nicolson’s finite difference method for different laser energies and pulse durations. Heat distribution throughout the dentin layer, from the external dentin surface to the pulp chamber wall, were calculated in each case, to investigate the details of pulsed laser-hard dental tissue interactions. The results showed that the final temperature at the pulp chamber wall and at the dentin surface are strongly dependent on the pulse duration, exposure time, and the energy contained in each pulse. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Eduardo H. Moriyama ; Renato A. Zangaro ; Paulo D. C. Lobo ; Antonio Balbin Villaverde ; Marcos T. Pacheco, et al.
"Optothermal transfer simulation in laser-irradiated human dentin", J. Biomed. Opt. 8(2), 298-302 (Apr 01, 2003). ; http://dx.doi.org/10.1117/1.1560000


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