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Proceedings Paper

Synergistic effect of fluoride and laser irradiation for the inhibition of the demineralization of dental enamel
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Paper Abstract

Both laser irradiation and fluoride treatment alone are known to provide increased resistance to acid dissolution. CO2 lasers tuned to a wavelength of 9.3 μm can be used to efficiently convert the carbonated hydroxyapatite of enamel to a much more acid resistant purer phase hydroxyapatite (HAP). Further studies have shown that fluoride application to HAP yields fluoroapatite (FAP) which is even more resistant against acid dissolution. Previous studies show that CO2 lasers and fluoride treatments interact synergistically to provide significantly higher protection than either method alone, but the mechanism of interaction has not been elucidated. We recently observed the formation of microcracks or a “crazed” zone in the irradiated region that is resistant to demineralization using high-resolution microscopy. The microcracks are formed due to the slight contraction of enamel due to transformation of carbonated hydroxyapatite to the more acid resistant pure phase hydroxyapatite (HAP) that has a smaller lattice. In this study, we test the hypothesis that these small cracks will provide greater adhesion for topical fluoride for greater protection against acid demineralization.

Paper Details

Date Published: 8 February 2017
PDF: 7 pages
Proc. SPIE 10044, Lasers in Dentistry XXIII, 100440L (8 February 2017); doi: 10.1117/12.2256739
Show Author Affiliations
Raymond Lee, Univ. of California, San Francisco (United States)
Kenneth H. Chan, Univ. of California, San Francisco (United States)
Jamison Jew, Univ. of California, San Francisco (United States)
Jacob C. Simon, Univ. of California, San Francisco (United States)
Daniel Fried, Univ. of California, San Francisco (United States)

Published in SPIE Proceedings Vol. 10044:
Lasers in Dentistry XXIII
Peter Rechmann; Daniel Fried, Editor(s)

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