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DIAGNOdent: An Optical Method for Caries Detection

¹ Department of Operative, Preventive and Paediatric Dentistry, Klinik für Zahnerhaltung, University of Bern, Freiburgstrasse 7, CH-3010 Bern, Switzerland; and
² Institut für Lasertechnologien in der Medizin und Messtechnik (ILM), Ulm, Germany;

View larger version (40K): [in a new window]   Figure 1. Fluorescence spectra of sound and carious tooth area. (A) 655-nm excitation; (B) as in (A), but normalized to peak intensity.

View larger version (16K): [in a new window]   Figure 2. Scheme of the DIAGNOdent.

View larger version (105K): [in a new window]   Figure 3. Longitudinal section of a tooth with dentinal caries under a macroscopically intact surface and two positions of the DIAGNOdent tip A. Left: No increased fluorescence can be measured, because the excitation fiber is in the center of the tip. Right: Only after the tip is tilted can the maximum fluorescence be measured.