19 May 1999 Noninvasive diagnosis of early caries with polarization-sensitive optical coherence tomography (PS-OCT)
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Proceedings Volume 3593, Lasers in Dentistry V; (1999) https://doi.org/10.1117/12.348347
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States
Abstract
There is no diagnostic technology presently available utilizing non-ionizing radiation that can image the state of demineralization of dental enamel in vivo for the detection, characterization and monitoring of early, incipient caries lesions. In this study, a Polarization Sensitive Optical Coherence Tomography (PS-OCT) system was evaluated for its potential for the non-invasive diagnosis of early carious lesions. We demonstrated clear discrimination in PS-OCT imags between regions of normal and demineralized enamel in bovine enamel blocks containing well-characterized artificial lesions. Moreover, high-resolution, cross- sectional images were acquired that clearly discriminate between the normal and carious regions of extracted human teeth. Regions that appeared to be demineralized in the PS- OCT imags were verified using histological thin sections examined under polarized light. The PS-OCT system discriminates between normal and carious regions by measuring the state of polarization of the back-scattered 1310 nm light, which is affected by the state of demineralization of the enamel. The demineralized regions of enamel have a large scattering coefficient, thus depolarizing the incident light. This initial study shows that PS-OCT has great potential for the detection, characterization, and monitoring of incipient caries lesions.
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Matthew J. Everett, Matthew J. Everett, Bill W. Colston, Bill W. Colston, Ujwal S. Sathyam, Ujwal S. Sathyam, Luiz Barroca Da Silva, Luiz Barroca Da Silva, Daniel Fried, Daniel Fried, John D. B. Featherstone, John D. B. Featherstone, "Noninvasive diagnosis of early caries with polarization-sensitive optical coherence tomography (PS-OCT)", Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); doi: 10.1117/12.348347; https://doi.org/10.1117/12.348347
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