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The relationship of dehydration rate and transparent surface layer thickness for coronal lesions on extracted teeth
Author(s): Nai-Yuan N. Chang; Marwa Abdelaziz; Daniel Fried
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Paper Abstract

Transparent remineralized surface zones found on natural caries lesions may reduce the permeability to water and plaque generated acids. Near-IR (NIR) reflectance imaging coupled with dehydration can be used to measure changes in the fluid permeability of lesions in enamel and dentin. Previous work demonstrated a negative association between the surface zone thickness and the rate of dehydration in simulated enamel lesions. In this study, the rates of dehydration and thickness of transparent surface layer of coronal lesions of extracted teeth were measured and correlated. Reflectance imaging at NIR wavelengths from 1695-1750 nm, which coincides with higher water absorption and manifests the greatest sensitivity to contrast changes during dehydration measurements, was used to image these enamel lesions. The remineralized surface layer thickness was determined using optical coherence tomography (OCT).

Paper Details

Date Published: 28 February 2019
PDF: 5 pages
Proc. SPIE 10857, Lasers in Dentistry XXV, 108570D (28 February 2019); doi: 10.1117/12.2512921
Show Author Affiliations
Nai-Yuan N. Chang, Univ. of California, San Francisco (United States)
Marwa Abdelaziz, Univ. de Genève (Switzerland)
Daniel Fried, Univ. of California, San Francisco (United States)

Published in SPIE Proceedings Vol. 10857:
Lasers in Dentistry XXV
Peter Rechmann; Daniel Fried, Editor(s)

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