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The contrast of demineralization on tooth occlusal surfaces from 405 to 1950-nm with varying depth
Author(s): Niloufar Mohajerani; Kenneth H. Chan; Vincent B. Yang; Daniel Fried; Cynthia L. Darling
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Paper Abstract

Near Infrared Reflectance (NIR) is a new imaging technology that detects dental caries (decay) on tooth occlusal surfaces and in the interproximal contact sites between teeth. Conventional techniques, mostly dental x-rays, do not provide the high sensitivity and specificity at the vulnerable pits and fissure regions. The contrast of demineralization on tooth surfaces changes with increasing severity and the magnitude of that change with depth depends on the wavelength. The purpose of this study is to determine how the contrast changes with depth as a function of wavelength. Demineralization of varying depth was produced in 1.5 × 1.5 mm exposed windows after 1, 2, 3, 4, and 5 days of exposure to a demineralizing solution at pH 4.5. Lesions were imaged at 405, 630, 850, 1300, 1460, 1535, 1675, and 1950-nm with multiple imaging systems. The highest lesion contrast was measured at 1950-nm.

Paper Details

Date Published: 28 February 2019
PDF: 5 pages
Proc. SPIE 10857, Lasers in Dentistry XXV, 108570O (28 February 2019); doi: 10.1117/12.2512941
Show Author Affiliations
Niloufar Mohajerani, Univ. of California, San Francisco (United States)
Kenneth H. Chan, Univ. of California, San Francisco (United States)
Vincent B. Yang, Univ. of California, San Francisco (United States)
Daniel Fried, Univ. of California, San Francisco (United States)
Cynthia L. Darling, 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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