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Proceedings Paper

Effect of pulsed Nd:YAG on dentin morphological changes
Author(s): Eduardo H. Moriyama; Renato Amaro Zangaro; Antonio G. J. Balbin Villaverde; Ii-Sei Watanabe; Egberto Munin; Luis H. Sasaki; Daniel K. Otsuka; Paulo Davi de Castro Lobo; Marcos T. T. Pacheco; Durval R. Junior
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Paper Abstract

Infrared lasers have been used for several clinical applications in dentistry, including laser ablation, oral surgeries and dentin hypersensitivity treatment. Despite of dentin low absorption coefficient in the near infrared spectrum, Nd:YAG laser radiation ((lambda) = 1064 nm) is able to melt the human dentin surface resulting in dentin tubules closure that can suppress the symptoms of dentin hypersensitivity pathology. Objectives: This study aims to analyze, through SEM technique, the morphological changes in dentin surface after Nd:YAG laser irradiation using different parameters in energy distribution. Materials and Methods: In this study sixteen human dentin samples were submitted to Nd:YAG laser radiation using a total energy of 900mJ distributed in one, two, three or six laser pulses with energy for each pulse of 900, 450, 300 or 150 mJ respectively. All the samples were irradiated with laser pulse width of 90ms, pulse intervals of 300 ms and spot size area of 0,005 cm2. Results: SEM analysis suggests that differences in energy distribution results in morphological differences even though the same energy is used for all the samples.

Paper Details

Date Published: 3 June 2002
PDF: 7 pages
Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); doi: 10.1117/12.469307
Show Author Affiliations
Eduardo H. Moriyama, Univ. do Vale do Paraiba (Brazil)
Renato Amaro Zangaro, Univ. do Vale do Paraiba (Brazil)
Antonio G. J. Balbin Villaverde, Univ. do Vale do Paraiba (Brazil)
Ii-Sei Watanabe, Univ. de Sao Paulo (Brazil)
Egberto Munin, Univ. do Vale do Paraiba (Brazil)
Luis H. Sasaki, Univ. do Vale do Paraiba (Brazil)
Daniel K. Otsuka, Univ. do Vale do Paraiba (Brazil)
Paulo Davi de Castro Lobo, Univ. do Vale do Paraiba (Brazil)
Marcos T. T. Pacheco, Univ. do Vale do Paraiba (Brazil)
Durval R. Junior, Faculdade de Engenharia Quimica de Lorena (Brazil)

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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