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Proceedings Paper

Light diffuse reflectance for detection and differentiation of teeth caries lesions
Author(s): E. Borisova; Tz. Uzunov; S. Valkanov; L. Avramov
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Paper Abstract

One of the goals of the contemporary dentistry is differentiation between carious stages that must be fast, non-invasive procedure, which will allow to the dentists to make reliable judgments. One suitable candidate for such method is reflectance spectroscopy. The objectives of current study are to determine the feasibility of applying the light reflectance spectroscopy technique for detection of different carious stages; therefore reflectance spectra of teeth illuminated at 450- 900 nm light were recorded. There are obtained reflectance signals from the healthy enamel, dentine and different lesion stages of the investigated teeth. These spectra are compared to that, obtained by non-carious tooth lesions - fluorosa and odontolithiasis, resembling on initial carious stages. There is observed a significant decrease of the intensity of the reflected light in blue region in the case of caries. Reflectance signals, obtained from non-carious lesions also have significantly different character and could be used for differentiation between them and initial carious stages. An algorithm for differentiation between carious stages is proposed with diagnostic accuracy achieved up to 86,1% between precarious stage and sound tooth and 100% for determination of deep cavitation. Some comments about role of teeth enamel structure and anisotropy factor of dental layers on the results obtained are also made.

Paper Details

Date Published: 26 April 2007
PDF: 11 pages
Proc. SPIE 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII, 65350A (26 April 2007); doi: 10.1117/12.740619
Show Author Affiliations
E. Borisova, Institute of Electronics (Bulgaria)
Tz. Uzunov, Medical Univ. Sofia (Bulgaria)
S. Valkanov, Institute of Metal Science (Bulgaria)
L. Avramov, Institute of Electronics (Bulgaria)


Published in SPIE Proceedings Vol. 6535:
Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII

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