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Proceedings Paper

Near-IR imaging of cracks in teeth
Author(s): William A. Fried; Jacob C. Simon; Seth Lucas; Kenneth H. Chan; Cynthia L. Darling; Michal Staninec; Daniel Fried
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Paper Abstract

Dental enamel is highly transparent at near-IR wavelengths and several studies have shown that these wavelengths are well suited for optical transillumination for the detection and imaging of tooth decay. We hypothesize that these wavelengths are also well suited for imaging cracks in teeth. Extracted teeth with suspected cracks were imaged at several wavelengths in the near-IR from 1300-1700-nm. Extracted teeth were also examined with optical coherence tomography to confirm the existence of suspected cracks. Several teeth of volunteers were also imaged in vivo at 1300-nm to demonstrate clinical potential. In addition we induced cracks in teeth using a carbon dioxide laser and imaged crack formation and propagation in real time using near-IR transillumination. Cracks were clearly visible using near-IR imaging at 1300-nm in both in vitro and in vivo images. Cracks and fractures also interfered with light propagation in the tooth aiding in crack identification and assessment of depth and severity.

Paper Details

Date Published: 18 February 2014
PDF: 6 pages
Proc. SPIE 8929, Lasers in Dentistry XX, 89290Q (18 February 2014); doi: 10.1117/12.2045686
Show Author Affiliations
William A. Fried, Univ. of California, San Francisco (United States)
Jacob C. Simon, Univ. of California, San Francisco (United States)
Seth Lucas, Univ. of California, San Francisco (United States)
Kenneth H. Chan, Univ. of California, San Francisco (United States)
Cynthia L. Darling, Univ. of California, San Francisco (United States)
Michal Staninec, Univ. of California, San Francisco (United States)
Daniel Fried, Univ. of California, San Francisco (United States)


Published in SPIE Proceedings Vol. 8929:
Lasers in Dentistry XX
Peter Rechmann; Daniel Fried, Editor(s)

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