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Proceedings Paper

Effect of a new carbon dioxide laser treatment on artificial caries progression in dentin
Author(s): John D. B. Featherstone; Daniel Fried; Charles Q. Le
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Paper Abstract

Previous studies have shown that pretreatment of dental enamel by specific carbon dioxide laser conditions inhibited progression of caries-like lesion progression in vitro. The aim of the present study was to determine whether irradiation by a new shorter pulse carbon dioxide laser would inhibit caries-like lesion progression in dentin. Dentin blocks were irradiated at 9.6 μm with a 20 μs pulse duration laser using overlapping spots, 5 pulses per spot, and fluences from 0.2 - 1.0 J/cm2. The blocks were subjected to pH-cycling to produce subsurface caries-like lesions including control groups, one with daily fluoride treatments. Lesion severity was assessed by cross-sectional microhardness measurement. Neither low fluences nor fluences in the optimum range for enamel significantly (p>0.05) inhibited lesion progression in dentin in this model. Only the fluoride treatment group significantly (p<0.05, ANOVA/Tukey) inhibited lesion progression by 33%.

Paper Details

Date Published: 3 July 2003
PDF: 5 pages
Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); doi: 10.1117/12.479754
Show Author Affiliations
John D. B. Featherstone, Univ. of California/San Francisco (United States)
Daniel Fried, Univ. of California/San Francisco (United States)
Charles Q. Le, Univ. of California/San Francisco (United States)


Published in SPIE Proceedings Vol. 4950:
Lasers in Dentistry IX
Peter Rechmann; Daniel Fried; Thomas Hennig, Editor(s)

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