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Journal of Biomedical Optics • Open Access

Selective removal of carious human dentin using a nanosecond pulsed laser operating at a wavelength of 5.85  μm
Author(s): Katsunori Ishii; Tetsuya Kita; Kazushi Yoshikawa; Kenzo Yasuo; Kazuyo Yamamoto; Kunio Awazu

Paper Abstract

Less invasive methods for treating dental caries are strongly desired. However, conventional dental lasers do not always selectively remove caries or ensure good bonding to the composite resin. According to our previous study, demineralized dentin might be removed by a nanosecond pulsed laser operating at wavelengths of around 5.8  μm. The present study investigated the irradiation effect of the light on carious human dentin classified into “remove,” “not remove,” and “unclear” categories. Under 5.85-μm laser pulses, at average power densities of 30  W/cm2 and irradiation time of 2 s, the ablation depth of “remove” and “not remove,” and also the ablation depth of “unclear” and “not remove,” were significantly different (p<0.01). The ablation depth was correlated with both Vickers hardness and Ca content. Thus, a nanosecond pulsed laser operating at 5.85  μm proved an effective less-invasive caries treatment.

Paper Details

Date Published: 16 January 2015
PDF: 7 pages
J. Biomed. Opt. 20(5) 051023 doi: 10.1117/1.JBO.20.5.051023
Published in: Journal of Biomedical Optics Volume 20, Issue 5
Show Author Affiliations
Katsunori Ishii, Osaka Univ. (Japan)
Tetsuya Kita, Osaka Univ. (Japan)
Kazushi Yoshikawa, Osaka Dental Univ. Hospital (Japan)
Kenzo Yasuo, Osaka Dental Univ. Hospital (Japan)
Kazuyo Yamamoto, Osaka Dental Univ. Hospital (Japan)
Kunio Awazu, Osaka Univ. (Japan)

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