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Proceedings Paper

Raman study of human dentin irradiated with Er:YAG laser
Author(s): Luis Eduardo S. Soares; Airton Abrahao Martin; Aldo Brugnera Jr.; Fatima A.A. Zanin D.D.S.; Emilia Angela Arisawa; Marcos Tadeu T. Pacheco
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Paper Abstract

Raman Spectroscopy was used to examine the distribution of the mineral and organic components in the human dentin before and after the chemical and thermal etching process. Polished dentin disks (n = 6/group) with 4mm thickness from twelve third molars were irradiated with Er:YAG laser. The dentin disks were prepared by polishing through a series of SiO2 papers with water and cleaned by ultrasonic system. Four pretreatment were performed. The disks were etched with 37% phosphoric acid (group I), Er:YAG laser 80mJ, 3Hz, 30s. (group II), Er:YAG laser 120mJ, 3Hz, 30s. (group III) and Er:YAG laser 180mJ, 3Hz, 30s. (group IV). The Raman spectra obtained from normal and treated dentin were analyzed. Attention was paid to the mineral PO4 (962 cm-1), CO3 (1073 cm-1) and to the organic component (1453cm-1). Raman spectroscopy showed that the mineral and organic dentin content were more affected in autoclaved teeth than in the specimens treated by Thymol. Peak area reduction in the specimens treated by Thymol in group I and II showed to be the most conservative procedures regarding to changes in organic and inorganic dentin components. Pulse energies of 120 and 180mJ showed to produce more reduction in the organic and inorganic content associated with more reduction in the peak areas at 960 and 1453cm-1.

Paper Details

Date Published: 10 September 2004
PDF: 9 pages
Proc. SPIE 5610, Laser Florence 2003: A Window on the Laser Medicine World, (10 September 2004); doi: 10.1117/12.584396
Show Author Affiliations
Luis Eduardo S. Soares, Univ. do Vale do Paraiba (Brazil)
Airton Abrahao Martin, Univ. do Vale do Paraiba (Brazil)
Aldo Brugnera Jr., Univ. do Vale do Paraiba (Brazil)
Fatima A.A. Zanin D.D.S., Univ. do Vale do Paraiba (Brazil)
Emilia Angela Arisawa, Univ. do Vale do Paraiba (Brazil)
Marcos Tadeu T. Pacheco, Univ. do Vale do Paraiba (Brazil)

Published in SPIE Proceedings Vol. 5610:
Laser Florence 2003: A Window on the Laser Medicine World
Leonardo Longo; Alfons G. Hofstetter; Mihail-Lucian Pascu; Wilhelm R. A. Waidelich, Editor(s)

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