Er:YAG laser irradiation of human dentin: Raman study of collagen

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

doi:10.1117/12.529395

28 May 2004 Er:YAG laser irradiation of human dentin: Raman study of collagen

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

Author Affiliations +

Proceedings Volume 5313, Lasers in Dentistry X; (2004) https://doi.org/10.1117/12.529395
Event: Biomedical Optics 2004, 2004, San Jose, CA, United States

Abstract

Raman Spectroscopy was used to examine the distribution of the 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% phoshporic acid for 15 s (group 1), Er:YAG laser 80 mJ, 3Hz, 30s. (group II), Er:YAG laser 120 mJ, 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 organic component (1453cm^-1). Raman spectroscopy showed that the 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 dentin components. Pulse energies of 120 and 180 mJ showed to preduce more reduction in the organic content associated with more reduction in the peak areas at 1453 cm^-1.

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Luis Eduardo S. Soares, Airton A. Martin, Aldo Brugnera Jr., Fatima Zanin D.D.S., Emilia Angela Arisawa, and Marcos T. T. Pacheco "Er:YAG laser irradiation of human dentin: Raman study of collagen", Proc. SPIE 5313, Lasers in Dentistry X, (28 May 2004); https://doi.org/10.1117/12.529395

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KEYWORDS

Er:YAG lasers

Raman spectroscopy

Collagen

Polishing

Etching

Lasers in dentistry

Teeth

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