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High-contrast reflectance imaging of composite restorations color-matched to tooth structure at 1000-2300-nm
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Paper Abstract

A major advantage of composite restoration materials is that they can be color matched to the tooth. However, this presents a challenge when composites fail and they need to be replaced. Dentists typically spend more time repairing and replacing composites than placing new restorations. We have shown in previous studies that high-contrast images of composite can be acquired in occlusal transmission mode at near-IR wavelengths coincident with higher water absorption. The purpose of this study was to determine if similar high-contrast images can be acquired in reflectance mode at longer wavelengths where water absorption is even higher. Extracted human teeth with existing composite restoration (n=14) were imaged at wavelengths from 900-2300 using an extended range InGaAs camera. Our results indicate that NIR wavelengths longer than 1400-nm coincident with higher water absorption yield the highest contrast between dental composites and tooth structure in reflectance.

Paper Details

Date Published: 8 February 2017
PDF: 6 pages
Proc. SPIE 10044, Lasers in Dentistry XXIII, 100440J (8 February 2017); doi: 10.1117/12.2256733
Show Author Affiliations
William A. Fried, Univ. of California, San Francisco (United States)
Jacob C. Simon, Univ. of California, San Francisco (United States)
Cynthia L. Darling, Univ. of California, San Francisco (United States)
Oanh Le, Univ. of California, San Francisco (United States)
Daniel Fried, Univ. of California, San Francisco (United States)


Published in SPIE Proceedings Vol. 10044:
Lasers in Dentistry XXIII
Peter Rechmann; Daniel Fried, Editor(s)

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