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Proceedings Paper

Effects of acid and laser treatments on dentin nanocrystals
Author(s): Egberto Munin; Marcela Leal Redigolo; Raquel de Almeida Ribeiro; Guilherme Paulo Escarpel de Mello; Thais Cachute Paradella; Marcos T. T. Pacheco
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Paper Abstract

The effects of laser or acid exposure on dentin have been explored for a number of years. Many researchers quite the recrystallization process, therefore there has been no scientific-oriented analysis regarding this issue. The first use of the word 'recrystallization' in laser treated dentin, was done by Dederich et al. They referred to needle-like crystals observed under Scanning Electron Microscopy (SEM) with high magnification. Further researchers continued quoting the recrystallization process in their works even though no evidence of crystals could be seen in their SEM pictures. In this work, four specimens of third human molars were prepared: one specimen was conditioned with 37 percent phosphoric acid, another was irradiated with a 10 Hz Nd:YAG laser at 1,5 W, after receiving the Er:YAG laser treatment. We maintained a control sample with no treatment. The samples were submitted to x-ray diffraction measurements and SEM, performed with the JSM-5900LV microscope of the LME/LNLS.

Paper Details

Date Published: 27 April 2001
PDF: 6 pages
Proc. SPIE 4249, Lasers in Dentistry VII, (27 April 2001); doi: 10.1117/12.424503
Show Author Affiliations
Egberto Munin, Univ. do Vale do Paraiba (Brazil)
Marcela Leal Redigolo, Univ. do Vale do Paraiba (Brazil)
Raquel de Almeida Ribeiro, Univ. Estadual de Campinas (Brazil)
Guilherme Paulo Escarpel de Mello, Univ. do Vale do Paraiba (Brazil)
Thais Cachute Paradella, Univ. do Vale do Paraiba (Brazil)
Marcos T. T. Pacheco, Univ. do Vale do Paraiba (Brazil)


Published in SPIE Proceedings Vol. 4249:
Lasers in Dentistry VII
Peter Rechmann; Daniel Fried; Thomas Hennig, Editor(s)

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