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Proceedings Paper

Ex-vivo evaluation of an early caries detector based on integrated OCT and polarized Raman spectroscopy (Conference Presentation)
Author(s): Guy Lamouche; Christian Padioleau; Mark Hewko; Michael S. D. Smith; Bernie J. Schattka; Crystal Fulton; Bruno Gauthier; André Beauchesne; Alex C. Ko; Lin-P'ing Choo-Smith; Michael G. Sowa

Paper Abstract

Early detection of incipient caries would allow dentists to provide more effective measures to delay or to reverse caries’ progression at earlier stage. Such earlier intervention could lead to improved oral health for the patients and reduced burden to the health system. Previously, we have demonstrated that the combination of morphological and biochemical information furnished by optical coherence tomography (OCT) and polarized Raman spectroscopy (PRS), respectively, provided a unique tool for dental caries management. In this study we will report the first pre-clinical caries detection system that includes a hand-held probe with a size slightly larger than a tooth brush. This probe presents a novel platform combining both OCT and PRS optics in a very tight space ideal for clinical practice. OCT cross-sectional images of near-surface enamel morphology are obtained with miniaturized MEMS scanning device and are processed in real-time to identify culprit regions. These regions are sequentially analyzed with polarized Raman spectroscopy for further confirmation. PRS is performed using 830nm laser line and four detection channels in order to obtain polarized Raman spectroscopic data, i.e. depolarization ratio of the hydroxyapatite Raman band at ~960 cm-1. A detailed description of this hand-held caries detector and ex-vivo/in-vivo test results will be presented.

Paper Details

Date Published: 19 April 2017
PDF: 1 pages
Proc. SPIE 10044, Lasers in Dentistry XXIII, 1004405 (19 April 2017); doi: 10.1117/12.2253224
Show Author Affiliations
Guy Lamouche, National Research Council Canada (Canada)
Christian Padioleau, National Research Council Canada (Canada)
Mark Hewko, National Research Council Canada (Canada)
Michael S. D. Smith, National Research Council Canada (Canada)
Bernie J. Schattka, National Research Council Canada (Canada)
Crystal Fulton, National Research Council Canada (Canada)
Bruno Gauthier, National Research Council Canada (Canada)
André Beauchesne, National Research Council Canada (Canada)
Alex C. Ko, National Research Council Canada (Canada)
Lin-P'ing Choo-Smith, Product Innovation and FibreCITY, Composites Innovation Ctr. (Canada)
Michael G. Sowa, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 10044:
Lasers in Dentistry XXIII
Peter Rechmann; Daniel Fried, Editor(s)

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