Optical coherence tomography for evaluation of enamel and protective coatings.
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.
Tokyo Medical and Dental University, Cariology and Operative Dentistry Department and Global Center of Excellence (GCOE) Program, 1-5-45 Yushima, Bunkyo-ku, Japan; Yanbu Dental Center, Saudi Ministry of Health, Al-Madina Health Region, Saudi Arabia.
Ehab Z
EZ
Alsayed
Ilnaz
I
Hariri
Alireza
A
Sadr
Syozi
S
Nakashima
Turki A
TA
Bakhsh
Yasushi
Y
Shimada
Yasunori
Y
Sumi
Junji
J
Tagami
D003188:Composite Resins / Q000737:chemistry*; D003743:Dental Enamel / Q000187:drug effects*; D066298:In Vitro Techniques; D010895:Pit and Fissure Sealants / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D041623:Tomography, Optical Coherence / Q000379:methods*; D017001:Tooth Demineralization / Q000517:prevention & control*
C438313:Clearfil SE Bond; C500418:Clinpro Sealant; D003188:Composite Resins; C000612974:PRG Barrier Coat; D010895:Pit and Fissure Sealants; D019279:Resin Cements; C000612975:Tokuyama Shield Force Plus