Effect of pulsed Nd:YAG on dentin morphological changes

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

doi:10.1117/12.469307

3 June 2002 Effect of pulsed Nd:YAG on dentin morphological changes

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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Proceedings Volume 4610, Lasers in Dentistry VIII; (2002) https://doi.org/10.1117/12.469307
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

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.

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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, and Durval R. Junior "Effect of pulsed Nd:YAG on dentin morphological changes", Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); https://doi.org/10.1117/12.469307

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KEYWORDS

Nd:YAG lasers

Scanning electron microscopy

Tissues

Natural surfaces

Pulsed laser operation

Laser dentistry

Photomicroscopy

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