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Caries Detection by Diode Laser Raman Spectroscopy

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Abstract:

Carious lesions can be distinguished from sound hard tooth tissues because their near-infrared Raman spectra exhibit an increased luminescence. A comparison of the ratio between luminescence and Raman band intensities for diseased and healthy areas of the tooth gives a measure for the stage of the disease. Intraoral analyses can be made in a reasonable time with the use of a diode laser, a fiber-optic Raman probe, and a compact spectrograph without moving optics. An excitation wavelength of 785 nm gives sufficient contrast between sound and carious tissue and allows a sensitive detection of the weak Raman scattering by silicon detectors.

Keywords: CARIES DETECTION; DIODE LASER; FIBER OPTICS; INTRAORAL ANALYSIS; LUMINESCENCE; RAMAN SPECTROSCOPY

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702001950409

Affiliations: 1: Institut für Spektrochemie und Angewandte Spektroskopie (ISAS), P.O. Box 101352, 44013 Dortmund, Germany 2: Poliklink fü Zahnerhaltung und Parodontologie, Universität Erlangen-Nürnberg, Glückstraße 11, 91054 Germany

Publication date: June 1, 2000

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