Selective removal of demineralization using near infrared cross polarization reflectance and a carbon dioxide laser

Kenneth H. Chan; Daniel Fried

doi:10.1117/12.914632

7 February 2012 Selective removal of demineralization using near infrared cross polarization reflectance and a carbon dioxide laser

Kenneth H. Chan, Daniel Fried

Author Affiliations +

Proceedings Volume 8208, Lasers in Dentistry XVIII; 82080U (2012) https://doi.org/10.1117/12.914632
Event: SPIE BiOS, 2012, San Francisco, California, United States

Abstract

Lasers can ablate/remove tissue in a non-contact mode of operation and a pulsed laser beam does not interfere with the ability to image the tooth surface, therefore lasers are ideally suited for integration with imaging devices for image-guided ablation. Laser energy can be rapidly and efficiently delivered to tooth surfaces using a digitally controlled laser beam scanning system for precise and selective laser ablation with minimal loss of healthy tissues. Under the appropriate irradiation conditions such laser energy can induce beneficial chemical and morphological changes in the walls of the drilled cavity that can increase resistance to further dental decay and produce surfaces with enhanced adhesive properties to restorative materials. Previous studies have shown that images acquired using near-IR transillumination, optical coherence tomography and fluorescence can be used to guide the laser for selective removal of demineralized enamel. Recent studies have shown that NIR reflectance measurements at 1470-nm can be used to obtain images of enamel demineralization with very high contrast. The purpose of this study was to demonstrate that image guided ablation of occlusal lesions can be successfully carried out using a NIR reflectance imaging system coupled with a carbon dioxide laser operating at 9.3-μm with high pulse repetition rates.

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Kenneth H. Chan and Daniel Fried "Selective removal of demineralization using near infrared cross polarization reflectance and a carbon dioxide laser", Proc. SPIE 8208, Lasers in Dentistry XVIII, 82080U (7 February 2012); https://doi.org/10.1117/12.914632

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