24 February 2015 Assessment of the remineralization in simulated enamel lesions via dehydration with near-IR reflectance imaging
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Proceedings Volume 9306, Lasers in Dentistry XXI; 93060H (2015) https://doi.org/10.1117/12.2083655
Event: SPIE BiOS, 2015, San Francisco, California, United States
Previous studies have demonstrated that near-IR imaging can be used to nondestructively monitor the severity of enamel lesions. Arrested lesions typically have a highly mineralized surface layer that reduces permeability and limits diffusion into the lesion. The purpose of this study was to investigate whether the rate of water loss correlates with the degree of remineralization using near-IR reflectance imaging. Artificial bovine (n=15) enamel lesions were prepared by immersion in a demineralization solution for 24 hours and they were subsequently placed in an acidic remineralization solution for different periods. The samples were dehydrated using an air spray for 30 seconds and surfaces were imaged using an InGaAs camera at 1300-1700 nm wavelengths. Near-IR reflectance intensity differences before and after dehydration decreased with longer periods of remineralization. This study demonstrated that near-IR reflectance imaging was suitable for the detection of remineralization in simulated caries lesions and near-IR wavelengths longer than 1400 nm are well suited for the assessment of remineralization.
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Robert C. Lee, Robert C. Lee, Cynthia L. Darling, Cynthia L. Darling, Daniel Fried, Daniel Fried, "Assessment of the remineralization in simulated enamel lesions via dehydration with near-IR reflectance imaging", Proc. SPIE 9306, Lasers in Dentistry XXI, 93060H (24 February 2015); doi: 10.1117/12.2083655; https://doi.org/10.1117/12.2083655

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