Raman study of human dentin irradiated with Er:YAG laser

Luis Eduardo S. Soares; Airton Abrahao Martin; Aldo Brugnera Jr.; Fatima A.A. Zanin D.D.S.; Emilia Angela Arisawa; Marcos Tadeu T. Pacheco

doi:10.1117/12.584396

10 September 2004 Raman study of human dentin irradiated with Er:YAG laser

Luis Eduardo S. Soares, Airton Abrahao Martin, Aldo Brugnera Jr., Fatima A.A. Zanin D.D.S., Emilia Angela Arisawa, Marcos Tadeu T. Pacheco

Author Affiliations +

Proceedings Volume 5610, Laser Florence 2003: A Window on the Laser Medicine World; (2004) https://doi.org/10.1117/12.584396
Event: Laser Florence 2003: A Window on the Laser Medicine World, 2003, Florence, Italy

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.

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Luis Eduardo S. Soares, Airton Abrahao Martin, Aldo Brugnera Jr., Fatima A.A. Zanin D.D.S., Emilia Angela Arisawa, and Marcos Tadeu T. Pacheco "Raman study of human dentin irradiated with Er:YAG laser", Proc. SPIE 5610, Laser Florence 2003: A Window on the Laser Medicine World, (10 September 2004); https://doi.org/10.1117/12.584396

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