Selective excavation of human carious dentin using the nanosecond pulsed laser in 5.8 μm wavelength range

Tetsuya Kita; Katsunori Ishii; Kazushi Yoshikawa; Kenzo Yasuo; Kazuyo Yamamoto; Kunio Awazu

doi:10.1117/12.2003922

25 March 2013 Selective excavation of human carious dentin using the nanosecond pulsed laser in 5.8-μm wavelength range

Tetsuya Kita, Katsunori Ishii, Kazushi Yoshikawa, Kenzo Yasuo, Kazuyo Yamamoto, Kunio Awazu

Proceedings Volume 8566, Lasers in Dentistry XIX; 85660B (2013) https://doi.org/10.1117/12.2003922
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Less-invasive treatment of caries has been needed in laser dentistry. Based on the absorption property of dentin substrates, 6 μm wavelength range shows specific absorptions and promising characteristics for the excavation. In our previous study, 5.8 μm wavelength range was found to be effective for selective excavation of carious dentin and restoration treatment using composite resin from the irradiation experiment with bovine sound and demineralized dentin. In this study, the availability of 5.8 μm wavelength range for selective excavation of human carious dentin was investigated for clinical application. A mid-infrared tunable nanosecond pulsed laser by difference-frequency generation was used for revealing the ablation property of human carious dentin. Irradiation experiments indicated that the wavelength of 5.85 μm and the average power density of 30 W/cm² realized the selective excavation of human carious dentin, but ablation property was different with respect to each sample because of the different caries progression. In conclusion, 5.8 μm wavelength range was found to be effective for selective excavation of human carious dentin.

Citation Download Citation

Tetsuya Kita, Katsunori Ishii, Kazushi Yoshikawa, Kenzo Yasuo, Kazuyo Yamamoto, and Kunio Awazu "Selective excavation of human carious dentin using the nanosecond pulsed laser in 5.8-μm wavelength range", Proc. SPIE 8566, Lasers in Dentistry XIX, 85660B (25 March 2013); https://doi.org/10.1117/12.2003922

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