1 July 2011 Red-shifted fluorescence of sound dental hard tissue
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J. of Biomedical Optics, 16(7), 071411 (2011). doi:10.1117/1.3606572
Abstract
Autofluorescence spectra were recorded in vitro from dentin, enamel, and whole teeth. The spectra exhibited a broad peak shifted by about 50 to 75 nm from the excitation wavelength and the shape of the spectra remained similar regardless of the excitation wavelength. The maximum of the autofluorescence spectra also exhibited a red-shift that depended upon the laser excitation wavelength. The amplitude of the red-shifted fluorescence spectra produced by 444 and 532 nm excitation lasers were compared to that produced by a 405 nm excitation laser. It was determined that the autofluorescence amplitude was not proportional to the inverse fourth power of the excitation laser wavelength. Therefore, the red-shifted fluorescence is not compatible with the previously proposed mechanism of Raman scattering. Instead, the mechanism giving rise to the laser-induced dental autofluorescence is explained by the red-edge-excitation effect.
Liang Zhang, Leonard Y. Nelson, Eric J. Seibel, "Red-shifted fluorescence of sound dental hard tissue," Journal of Biomedical Optics 16(7), 071411 (1 July 2011). http://dx.doi.org/10.1117/1.3606572
Submission: Received ; Accepted
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KEYWORDS
Luminescence

Teeth

Spectroscopy

Raman scattering

Absorption

Optical filters

Fiber lasers

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