FEL Ablation Effects on Human Dental Enamel and Dentin
Objectives: It was shown that Er:YAG laser (2.94 µm) is the best fit for etching of dental hard tissues. However, the wavelength was derived from the absorption effect of water, and not included the effects of the other constituents. To verify the optimum wavelength for human dental enamel and dentin ablation by lasers, wavelength tunable free-electron laser (FEL) was applied. Methods: FEL covering the wide range of wavelength, 1.0 - 6.0 µm, was generated at LEBRA, Nihon University. Human tooth sections were irradiated by the LEBRA-FEL with a variety of wavelength. Results: Pit formation was maximized at around 3.0 µm, and minimized to both ends. However, there was a slight but appreciable difference between the optimum wavelength for enamel and dentin. Conclusions: The optimum wavelengths for ablation of dental enamel and dentin were around 3.0 µm. The slight difference between the two may be attributed to their constitutions. This study was defrayed by a Grant-in-Aid for Scientific Research from JSPS (No. 17591927).
Division: Japanese Division Meeting
Meeting:2005 Japanese Division Meeting (Okayama, Japan) Location: Okayama, Japan
Year: 2005 Final Presentation ID:116 Abstract Category|Abstract Category(s):Scientific Groups
Authors
Sakae, Toshiro
( Nihon University, Matsudo Chiba, N/A, Japan
)
Sato, Yukie
( Nihon University, Matsudo Chiba, N/A, Japan
)
Okada, Hiroyuki
( Nihon University, Matsudo Chiba, N/A, Japan
)
Yamamoto, Hirotsugu
( Nihon University, Matsudo Chiba, N/A, Japan
)
Suzuki, Kunihiro
( Nihon University, Matsudo Chiba, N/A, Japan
)
Yamamoto, Hitoshi
( Nihon University, Matsudo Chiba, N/A, Japan
)
Kozawa, Yukishige
( Nihon University, Matsudo Chiba, N/A, Japan
)
Sato, Isamu
( Nihon University, Chiba, N/A, Japan
)