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Proceedings Paper

A simple dental caries detection system using full spectrum of laser-induced fluorescence
Author(s): Renata Maciel Rocha-Cabral; Fausto Medeiros Mendes; Edison Puig Maldonado; Denise Maria Zezell
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Paper Abstract

Objectives: to develop an apparatus for the detection of early caries lesions in enamel using the full extent of the tooth fluorescence spectrum, through the integration of a laser diode, fiber optics, filters and one portable spectrometer connected to a computer, all commercially available; to evaluate the developed device in clinical and laboratory tests, and compare its performance with commercial equipment. Methods: clinical examinations were performed in patients with indication for exodontics of premolars. After examinations, the patients underwent surgery and the teeth were stored individually. The optical measurements were repeated approximately two months after extraction, on the same sites previously examined, then histological analysis was carried out. Results: the spectral detector has presented high specificity and moderate sensitivity when applied to differentiate between healthy and damaged tissues, with no significant differences from the performance of the commercial equipment. The developed device is able to detect initial damages in enamel, with depth of approximately 300 μm. Conclusions: we successfully demonstrated the development of a simple and portable system based in laser-induced fluorescence for caries detection, assembled from common commercial parts. As the spectral detector acquires a complete recording of the spectrum from each tissue, it is possible to use it for monitoring developments of caries lesions.

Paper Details

Date Published: 19 June 2015
PDF: 13 pages
Proc. SPIE 9531, Biophotonics South America, 95311A (19 June 2015); doi: 10.1117/12.2180777
Show Author Affiliations
Renata Maciel Rocha-Cabral, IPEN-CNEN/SP (Brazil)
Fausto Medeiros Mendes, Univ. de São Paulo (Brazil)
Edison Puig Maldonado, IPEN-CNEN/SP (Brazil)
Denise Maria Zezell, IPEN-CNEN/SP (Brazil)

Published in SPIE Proceedings Vol. 9531:
Biophotonics South America
Cristina Kurachi D.D.S.; Katarina Svanberg M.D.; Bruce J. Tromberg; Vanderlei Salvador Bagnato, Editor(s)

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