Optical coherence tomography for evaluation of enamel and protective coatings
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- ALSAYED Ehab Z.
- Tokyo Medical and Dental University, Cariology and Operative Dentistry Department and Global Center of Excellence (GCOE) Program Yanbu Dental Center, Saudi Ministry of Health, Al-Madina Health Region
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- HARIRI Ilnaz
- Tokyo Medical and Dental University, Cariology and Operative Dentistry Department
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- SADR Alireza
- Tokyo Medical and Dental University, International Exchange Center and Cariology and Operative Dentistry Department University of Washington, School of Dentistry, Department of Restorative Dentistry
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- NAKASHIMA Syozi
- Tokyo Medical and Dental University, Cariology and Operative Dentistry Department
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- BAKHSH Turki A.
- King Abdulaziz University, Conservative Dental Sciences
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- SHIMADA Yasushi
- Tokyo Medical and Dental University, Cariology and Operative Dentistry Department
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- SUMI Yasunori
- National Center for Geriatrics and Gerontology, Department for Advanced Dental Research, Center of Advanced Medicine for Dental and Oral Diseases
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- TAGAMI Junji
- Tokyo Medical and Dental University, Cariology and Operative Dentistry Department
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Abstract
Optical coherence tomography (OCT) is an interferometric imaging technique. This study aimed to employ OCT to evaluate four different resin-based materials including a coating containing glass-ionomer filler and calcium, a giomer, and two fluoride-releasing self-etch resins. The coating and its underlying and adjacent enamel were monitored using swept-source OCT (center wavelength: 1330 nm) at baseline, after 5,000 thermal cycles, and after 1, 4 and 7 days of demineralization (pH 4.5). The coatings showed different thicknesses (60–250 micrometers) and various levels of structural and interfacial integrity. OCT could detect a demineralization inhibition zone adjacent to the edge of the fluoride- and calcium-releasing material. Localized demineralization was occasionally observed under thinner coatings. Protection of susceptible enamel surfaces by thin resin-based bioactive coatings provides protection from demineralization. OCT can be used to non-destructively monitor the integrity of such coatings, as well as enamel changes beneath and adjacent to them.
Journal
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- Dental Materials Journal
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Dental Materials Journal 34 (1), 98-107, 2015
The Japanese Society for Dental Materials and Devices
