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Journal of Biomedical Optics

In vitro detection and quantification of enamel and root caries using infrared photothermal radiometry and modulated luminescence
Author(s): Raymond J. Jeon; Adam Hellen; Anna Matvienko; Andreas Mandelis; Stephen H. Abrams; Bennett T. Amaechi
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Paper Abstract

Artificially created demineralized and remineralized carious lesions on the root and enamel of human teeth were examined by photothermal radiometry (PTR) and modulated luminescence (LUM). Fourteen extracted human teeth were used and a lesion was created on a 1 mm×4 mm rectangular window, spanning root to enamel, using a lactic acid-based acidified gel to demineralize the tooth surface. The lesion was then exposed to a remineralization solution. Each sample was examined with PTR/LUM on the root and enamel before and after treatment at times from 1 to 10 (5 on root) days of demineralization and 2 to 10 days of remineralization. Ten-day (5 on root) demineralized samples were remineralized. After completing all the experiments, transverse microradiography (TMR) analysis was performed to compare and correlate the PTR/LUM signals to the depth of lesions and mineral losses. The PTR and LUM amplitudes and phases showed gradual and consistent changes with treatment time. In this study, TMR showed good correlation coefficients with PTR and LUM. It was also found that the length of the treatment time did not correlate very well to any technique, PTR/LUM or TMR, which implies a significant degree of inhomogeneity of the demireralization and remineralization rates in each and every tooth.

Paper Details

Date Published: 1 May 2008
PDF: 11 pages
J. Biomed. Opt. 13(3) 034025 doi: 10.1117/1.2942374
Published in: Journal of Biomedical Optics Volume 13, Issue 3
Show Author Affiliations
Raymond J. Jeon, Univ. of Toronto (Canada)
Adam Hellen, Univ. of Toronto (Canada)
Anna Matvienko, Univ. of Toronto (Canada)
Andreas Mandelis, Univ. of Toronto (Canada)
Stephen H. Abrams, Quantum Dental Technologies (Canada)
Bennett T. Amaechi, The Univ. of Texas Health Science Ctr. at San Antonio (United States)

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