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Your search keyword '"Yuichi Kitasako"' showing total 2 results
Start Over Author "Yuichi Kitasako" Journal journal of biomedical optics
2 results on '"Yuichi Kitasako"'

1. Monitoring remineralization of enamel subsurface lesions by optical coherence tomography

Author

Mona M. Mandurah, Junji Tagami, Yasunori Sumi, Alireza Sadr, Turki A. Bakhsh, Yuichi Kitasako, Yasushi Shimada, and Syozi Nakashima

Subjects
Materials science, Biomedical Engineering, Dentistry, Biomaterials, Fluorides, stomatognathic system, Optical coherence tomography, Hardness, medicine, Animals, Dental Enamel, Tooth Demineralization, Remineralisation, Analysis of Variance, Enamel paint, medicine.diagnostic_test, business.industry, Attenuation, Tooth Remineralization, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Demineralization, visual_art, Attenuation coefficient, visual_art.visual_art_medium, Linear Models, Calcium, Cattle, Tomography, business, Tomography, Optical Coherence, Biomedical engineering
Abstract

Optical coherence tomography (OCT) is a potential clinical tool for enamel lesion monitoring. Swept-source OCT findings were compared with cross-sectional nanohardness findings of enamel. Subsurface bovine enamel lesions in three groups were subjected to (1) deionized water (control), (2) phosphoryl oligosaccharide of calcium (POs-Ca) or (3) POs-Ca with 1 ppm fluoride for 14 days. B-scans images were obtained at 1310-nm center wavelength on sound, demineralized and remineralized areas after 4, 7, and 14 days. The specimens were processed for cross-sectional nanoindentation. Reflectivity from enamel that had increased with demineralization decreased with remineralization. An OCT attenuation coefficient parameter (μt), derived based on the Beer-Lambert law as a function of backscatter signal slope, showed a strong linear regression with integrated nanohardness of all regions (p

Published
2013

2. Monitoring remineralization of enamel subsurface lesions by optical coherence tomography.

Author

Mandurah, Mona M., Sadr, Alireza, Yasushi Shimada, Yuichi Kitasako, Syozi Nakashima, Bakhsh, Turki A., Junji Tagami, and Yasunori Sumi

Subjects
OPTICAL coherence tomography, OPTICAL biological sensors, REMINERALIZATION (Teeth), BEER-Lambert law, LIGHT absorption
Abstract

Optical coherence tomography (OCT) is a potential clinical tool for enamel lesion monitoring. Swept-source OCT findings were compared with cross-sectional nanohardness findings of enamel. Subsurface bovine enamel lesions in three groups were subjected to (1) deionized water (control), (2) phosphoryl oligosaccharide of calcium (POs-Ca) or (3) POs-Ca with 1 ppm fluoride for 14 days. B-scans images were obtained at 1310-nm center wavelength on sound, demineralized and remineralized areas after 4, 7, and 14 days. The specimens were processed for cross-sectional nanoindentation. Reflectivity from enamel that had increased with demineralization decreased with remineralization. An OCT attenuation coefficient parameter (μt), derived based on the Beer-Lambert law as a function of backscatter signal slope, showed a strong linear regression with integrated nanohardness of all regions (p<0.001, r=-0.97). Sound enamel showed the smallest, while demineralized enamel showed the highest μt. In group three, μt was significantly lower at four days than baseline, but remained constant afterwards. In group two, the changes were rather gradual. There was no significant difference between groups two and three at 14 days in nanohardness or μt POs-Ca with fluoride-enhanced nanohardness of the superficial zone. OCT signal attenuation demonstrated a capability for monitoring changes of enamel lesions during remineralization. [ABSTRACT FROM AUTHOR]

Published
2013
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