The relationship of dehydration rate and transparent surface layer thickness for coronal lesions on extracted teeth

Nai-Yuan N. Chang; Marwa Abdelaziz; Daniel Fried

doi:10.1117/12.2512921

28 February 2019 The relationship of dehydration rate and transparent surface layer thickness for coronal lesions on extracted teeth

Nai-Yuan N. Chang, Marwa Abdelaziz, Daniel Fried

Author Affiliations +

Proceedings Volume 10857, Lasers in Dentistry XXV; 108570D (2019) https://doi.org/10.1117/12.2512921
Event: SPIE BiOS, 2019, San Francisco, California, United States

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).

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Nai-Yuan N. Chang, Marwa Abdelaziz, and Daniel Fried "The relationship of dehydration rate and transparent surface layer thickness for coronal lesions on extracted teeth ", Proc. SPIE 10857, Lasers in Dentistry XXV, 108570D (28 February 2019); https://doi.org/10.1117/12.2512921

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