11 February 2008 Inhibition of caries in vital teeth by CO2 laser treatment
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Proceedings Volume 6843, Lasers in Dentistry XIV; 684307 (2008) https://doi.org/10.1117/12.778797
Event: SPIE BiOS, 2008, San Jose, California, United States
In multiple well-controlled laboratory studies enhancing caries resistance of enamel has been successfully reported using short-pulsed 9.6 µm CO2 laser irradiation. The aim of this study was to prove in a short term clinical pilot trial that the use of the CO2 laser will significantly inhibit the formation of carious lesions around orthodontic brackets in vivo in comparison to a non-irradiated control area. Twelve subjects scheduled for extraction of premolars for orthodontic treatment reasons with an average age of 14.6 years were recruited for the 4-week study. Orthodontic brackets were placed on those premolars with a conventional composite resin (Transbond XT, 3M Unitek, REF 712-035) and a defined area next to the bracket was irradiated with a CO2 laser, Pulse System, Inc (PSI) (Model #LPS-500, Los Alamos, New Mexico), wavelength 9.6 &mgr;m, pulse duration 20 &mgr;s, pulse repetition rate 20 Hz, beam diameter 1,100 &mgr;m, average fluence 4.31 +/- 0.11 J/cm2, 20 laser pulses per spot. Premolars were extracted after four weeks for a quantitative assessment of demineralization by cross sectional microhardness testing. The relative mineral loss &Dgr;Z (vol% x µm) for the laser treated enamel was 402 +/- 85 (SE) while the control area showed a significantly higher mineral loss (mean &Dgr;Z 738 +/- 131; P=0.04, unpaired t-test). The laser treatment produced a 46% demineralization inhibition around the orthodontic brackets in comparison to the non-laser treated areas. This study showed, for the first time that a pulsed 9.6 µm CO2 laser works for the prevention of dental caries in the enamel in vital teeth in human mouths.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Rechmann, Peter Rechmann, Daniel Fried, Daniel Fried, Charles Q. Le, Charles Q. Le, Gerald Nelson, Gerald Nelson, Marcia Rapozo-Hilo, Marcia Rapozo-Hilo, Beate M. T. Rechmann, Beate M. T. Rechmann, John D. B. Featherstone, John D. B. Featherstone, } "Inhibition of caries in vital teeth by CO2 laser treatment", Proc. SPIE 6843, Lasers in Dentistry XIV, 684307 (11 February 2008); doi: 10.1117/12.778797; https://doi.org/10.1117/12.778797

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