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Proceedings Paper

Selective ablation of pit and fissure caries from occlusal surfaces using λ=355-nm laser pulses and air-abrasion demonstrated using PS-OCT and near-IR imaging
Author(s): Steven T. Ross; Kenneth Fan; Daniel Fried
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Paper Abstract

Several past studies have suggested that lasers with and without added chromophores can be used for the selective removal of dental caries from stained pit and fissures in preparation for composite sealant placement with minimal damage to sound, unstained tooth structure. Polarization sensitive optical coherence tomography (PS-OCT) is a new nondestructive imaging technology that can be used to acquire images of caries lesions in occlusal surfaces. PSOCT is ideally suited to measure the caries depth and severity before and after selective removal from occlusal surfaces. In this study, λ=355-nm laser pulses of 5-ns duration at irradiation intensities ranging from 0.5-1.3 J/cm2 were scanned across tooth surfaces to selectively remove decayed enamel with and without the addition of India ink. PS-OCT images were acquired before and after removal. The laser removal was also compared to air abrasion in order to compare selectivity of these two conservative caries removal technologies.

Paper Details

Date Published: 15 February 2006
PDF: 9 pages
Proc. SPIE 6137, Lasers in Dentistry XII, 61370S (15 February 2006); doi: 10.1117/12.661791
Show Author Affiliations
Steven T. Ross, Univ. of California/San Francisco (United States)
Kenneth Fan, Univ. of California/San Francisco (United States)
Daniel Fried, Univ. of California/San Francisco (United States)

Published in SPIE Proceedings Vol. 6137:
Lasers in Dentistry XII
Peter Rechmann; Daniel Fried, Editor(s)

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