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Proceedings Paper

Secondary caries detection with a novel fluorescence-based camera system in vitro
Author(s): Olivier Brede; Claudia Wilde; Felix Krause; Matthias Frentzen; Andreas Braun
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Paper Abstract

The aim of the study was to assess the ability of a fluorescence based optical system to detect secondary caries. The optical detecting system (VistaProof) illuminates the tooth surfaces with blue light emitted by high power GaN-LEDs at 405 nm. Employing this almost monochromatic excitation, fluorescence is analyzed using a RGB camera chip and encoded in color graduations (blue - red - orange - yellow) by a software (DBSWIN), indicating the degree of caries destruction. 31 freshly extracted teeth with existing fillings and secondary caries were cleaned, excavated and refilled with the same kind of restorative material. 19 of them were refilled with amalgam, 12 were refilled with a composite resin. Each step was analyzed with the respective software and analyzed statistically. Differences were considered as statistically significant at p<0.05. There was no difference between measurements at baseline and after cleaning (Mann Whitney, p>0.05). There was a significant difference between baseline measurements of the teeth primarily filled with composite resins and the refilled situation (p=0.014). There was also a significant difference between the non-excavated and the excavated group (Composite p=0.006, Amalgam p=0.018). The in vitro study showed, that the fluorescence based system allows detecting secondary caries next to composite resin fillings but not next to amalgam restorations. Cleaning of the teeth is not necessary, if there is no visible plaque. Further studies have to show, whether the system shows the same promising results in vivo.

Paper Details

Date Published: 6 March 2010
PDF: 5 pages
Proc. SPIE 7549, Lasers in Dentistry XVI, 75490H (6 March 2010); doi: 10.1117/12.841776
Show Author Affiliations
Olivier Brede, Univ. Dental Clinic Bonn (Germany)
Claudia Wilde, Univ. Dental Clinic Bonn (Germany)
Felix Krause, Univ. Dental Clinic Bonn (Germany)
Matthias Frentzen, Univ. Dental Clinic Bonn (Germany)
Andreas Braun, Univ. Dental Clinic Bonn (Germany)


Published in SPIE Proceedings Vol. 7549:
Lasers in Dentistry XVI
Peter Rechmann; Daniel Fried, Editor(s)

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