| 0839 Effects of topical fluoride and laser irradiation on caries inhibition | ||
|
M. YOUSEF1, M. FONTANA1, C. GONZALEZ-CABEZAS2, A. MARTINEZ-MIER3, and G. ECKERT4, 1Indiana University - Indianapolis, USA, 2Indiana University, School of Dentistry, Indianapolis, USA, 3Indiana University, 4Indiana University, Indianapolis, USA Several studies have demonstrated the ability of lasers used alone or with fluoride to enhance enamel and dentin's resistance to dissolution in acid. However, little is known on which commercially available is best to accomplish this purpose. Objective: The purpose of this study was to compare the effectiveness of different commercial lasers (alone or with APF gel) in enhancing enamel resistance to demineralization. Methods: Three lasers were tested: Nd:YAG laser (dLase 300 plus), CO2 laser (Luxar laser LX-20, Luxarcare), and argon laser (Lasermed). 132 extracted human molars were divided in the following 11 treatment groups: each laser alone, each laser in combination with an APF gel (before or after irradiation), a positive control (APF alone), and a negative control (no treatment). After their respective treatment, specimens were demineralized for 96 hours in a lactic acid/carbopol solution (pH 5.0), at 37 ¢ªC. Specimens were then analyzed for firmly and loosely bound fluoride, and lesion size using confocal microscopy. Results: Combining APF (before or after) with the CO2 and argon lasers completely prevented development of lesions. Nd:YAG laser followed by APF also prevented development of lesions, however, APF followed by Nd:YAG laser produced lesions, which were significantly shallower than those produced in the Nd:YAG, CO2, argon, and negative control groups. All 3 laser-only treated groups developed significantly shallower lesions than the negative control. The APF group developed significantly shallower lesions than fluoride-Nd:YAG, Nd:YAG, CO2, argon, and the negative control. The uptake of loosely bound fluoride was significantly higher at 30m depth than at 90m for all treated groups. Fluoride uptake was significantly higher at 30m than at 90m depth for argon, argon-fluoride, CO2, Nd:YAG, and the positive control. Conclusion: All 3 commercial lasers tested, either alone or combined with APF, significantly enhanced enamel resistance to chemical dissolution. | ||
| Seq #108 - F Products and Measurements Posters 2:00 PM-4:00 PM, Thursday, 10 March 2005 Baltimore Convention Center Exhibit Hall E-F | ||
|
Back to the Cariology Research Program
| ||