18 February 2008 Changes in acid resistance of dentin irradiated by a CW 10.6 &mgr;m CO2 laser
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Proceedings Volume 6843, Lasers in Dentistry XIV; 684305 (2008) https://doi.org/10.1117/12.778795
Event: SPIE BiOS, 2008, San Jose, California, United States
Abstract
The overall objective of our studies is to establish laser conditions that can be used clinically for the prevention or treatment of early carious lesions in dental enamel and dentin. Previous studies have shown that laser irradiation of dental enamel by specific carbon dioxide laser conditions can inhibit subsequent acid dissolution of the dental enamel surface. The purpose of this study was to determine whether irradiation of dentin by a continuous wave 10.6 µm carbon dioxide laser would inhibit acid dissolution. Blocks of human dentin roots (3x3 mm2) were irradiated at 10.6 µm wavelength with power settings of 0.5, 0.75, 1.0, 1.5 and 2.0 watts. A motion controller system was used to ensure uniform irradiation of the entire dentin surface. Surface acid dissolution profiles following irradiation were acquired for the irradiated groups and a non-irradiated control group. Dissolution rates for 0.5 and 0.75 watts were not statistically significant (p>0.05) from the control group, whereas irradiation at 1.0 watts and higher significantly (p<0.05) increased the acid dissolution rate. Considerable surface damage occurred at these higher powers. This study demonstrated that irradiation of dentin by a continuous wave 10.6 µm carbon dioxide but did not decrease the acid dissolution rate, and was detrimental at powers of 1.0 watts and above.
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John D. B. Featherstone, Charles Q. Le, Dennis Hsu, Saman Manesh, Daniel Fried, "Changes in acid resistance of dentin irradiated by a CW 10.6 &mgr;m CO2 laser", Proc. SPIE 6843, Lasers in Dentistry XIV, 684305 (18 February 2008); doi: 10.1117/12.778795; https://doi.org/10.1117/12.778795
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