Changes in dental enamel oven heated or irradiated with Er,Cr:YSGG laser. Analysis by FTIR

Author(s)

Rabelo, J. S. ^[1] ; Ana, P. A. ^[1] ; Benetti, C. ^[1] ; Valerio, M. E. G. ^[2] ; Zezell, D. M. ^[1]

Affiliation

^[1] CNEN SP, IPEN, Ctr Lasers & Aplicacoes, Sao Paulo - Brazil

^[2] Univ Fed Sergipe, Dept Fis, Sao Cristovao - Brazil

• Document type: Journal article
• Source: Laser Physics; v. 20, n. 4, p. 871-875, APR 2010.
• Web of Science Citations: 12

Abstract

This study evaluated the change that occurs in dental enamel under action of oven heating or Er,Cr:YSGG laser irradiation aiming to obtain a structure more resistant to demineralization. Enamel powder was obtained from bovine teeth. Samples were subjected to oven heating at temperatures of 200, 400, 600, 800, and 1000A degrees C or during laser irradiation with energy densities of 7.53, 10.95, and 13.74 J/cm(2). The infrared thermography was used to measure the surface temperature generated in the solid samples of enamel during lasers irradiation. The samples were analyzed by Fourier transform infrared spectroscopy (FTIR), which shows changes on enamel oven heated or laser irradiated, due to treatments, related to carbonates, adsorbed water and hydroxyl content. These compositional effects were more evident in lased samples. These changes may alter the material properties such as its solubility, and decrese of demineralization that is important for caries prevention. (AU)

• FAPESP's process: 05/51689-2 - Optics and Photonics Research Center at UNICAMP
• Grantee: Hugo Luis Fragnito
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC