Selective excavation of decalcified dentin using a mid-infrared tunable nanosecond pulsed laser: wavelength dependency in the 6 &#956;m wavelength range

Katsunori Ishii; Masayuki Saiki; Kazushi Yoshikawa; Kenzo Yasuo; Kazuyo Yamamoto; Kunio Awazu

doi:10.1117/12.889634

2 June 2011 Selective excavation of decalcified dentin using a mid-infrared tunable nanosecond pulsed laser: wavelength dependency in the 6 μm wavelength range

Katsunori Ishii, Masayuki Saiki, Kazushi Yoshikawa, Kenzo Yasuo, Kazuyo Yamamoto, Kunio Awazu

Author Affiliations +

Proceedings Volume 8092, Medical Laser Applications and Laser-Tissue Interactions V; 809206 (2011) https://doi.org/10.1117/12.889634
Event: European Conferences on Biomedical Optics, 2011, Munich, Germany

Abstract

Selective caries treatment has been anticipated as an essential application of dentistry. In clinic, some lasers have already realized the optical drilling of dental hard tissue. However, conventional lasers lack the selectivity, and still depend on the dentist's ability. Based on the absorption property of carious dentin, 6 μm wavelength range shows specific absorptions and promising characteristics for excavation. The objective of this study is to develop a selective excavation of carious dentin by using the laser ablation with 6 μm wavelength range. A mid-infrared tunable pulsed laser was obtained by difference-frequency generation technique. The wavelength was tuned around the absorption bands called amide 1 and amide 2. In the wavelength range from 5.75 to 6.60 μm, the difference of ablation depth between demineralized and normal dentin was observed. The wavelength at 6.02 μm and the average power density of 15 W/cm², demineralized dentin was removed selectively with less-invasive effect on normal dentin. The wavelength at 6.42 μm required the increase of average power density, but also showed the possibility of selective ablation. This study provided a valuable insight into a wavelength choice for a novel dental laser device under development for minimal intervention dentistry.

Citation Download Citation

Katsunori Ishii, Masayuki Saiki, Kazushi Yoshikawa, Kenzo Yasuo, Kazuyo Yamamoto, and Kunio Awazu "Selective excavation of decalcified dentin using a mid-infrared tunable nanosecond pulsed laser: wavelength dependency in the 6 μm wavelength range", Proc. SPIE 8092, Medical Laser Applications and Laser-Tissue Interactions V, 809206 (2 June 2011); https://doi.org/10.1117/12.889634

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available