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Image guided laser ablation of demineralization from root surfaces
Author(s): Navitinder Dhillon; Kenneth H. Chan; Vincent B. Yang; Daniel Fried
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Paper Abstract

It is challenging to identify demineralized areas of root lesions due to cervical erosion, calculus formation, and heavy staining of dentin. We have found that root caries can be imaged with extremely high contrast at short wavelength IR (SWIR) wavelengths beyond 1500-nm. Lasers are well suited for the selective removal of caries lesions from tooth surfaces. A CO2 laser operating at a wavelength of 9.3-μm was combined with a thuliumdoped fiber laser operating at 1880-nm for the selective removal of root caries lesions from extracted teeth. Serial SWIR reflectance images at 1880-nm were used to guide the CO2 laser for image-guided laser ablation. Cross polarization optical coherence tomography (CP-OCT) was used to assess the initial depth of the lesions before removal and assess the volume of sound and demineralized tissue removed by the CO2 laser. With this image-guided approach, we believe we can achieve highly selective lesion removal and minimal damage to surrounding sound tissues.

Paper Details

Date Published: 28 February 2019
PDF: 5 pages
Proc. SPIE 10857, Lasers in Dentistry XXV, 108570N (28 February 2019); doi: 10.1117/12.2512938
Show Author Affiliations
Navitinder Dhillon, 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)

Published in SPIE Proceedings Vol. 10857:
Lasers in Dentistry XXV
Peter Rechmann; Daniel Fried, Editor(s)

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