Oral Function Improves Interfacial Integrity and Sealing Ability Between Conventional Glass Ionomer Cements and Dentin.
The aim of this study was to investigate if load cycling affects interfacial integrity of glass ionomer cements bonded to sound- or caries-affected dentin. A conventional glass ionomer, Ketac Bond, and a resin-modified glass ionomer (Vitrebond Plus), were applied to dentin. Half of the specimens were load cycled. The interfaces were submitted to dye-assisted confocal microscopy evaluation. The unloaded specimens of sound and carious dentin were deficiently hybridized when Ketac Bond was used. Ketac Bond samples showed an absorption layer and an adhesive layer that were scarcely affected by fluorescein penetration (nanoleakage), in sound dentin. Nevertheless, a higher degree of micropermeability was found in carious dentin. In Ketac Bond specimens, load cycling improves the sealing capability and remineralization at the cement-dentin interface as porosity and nanoleakage was reduced. In contrast, samples treated with Vitrebond Plus exhibited a Rhodamine B-labeled absorption layer with scarce nanoleakage in both sound and carious unloaded dentin. The adhesive layer was affected by dye sorption throughout the porous cement-dentin interface. Samples treated with Vitrebond Plus had significant increases in nanoleakage and cement-dye sorption after load cycling. Within the limitations of an in vitro study, it is expected that conventional glass ionomers will provide major clinical efficacy when applied to carious-affected or sound dentin.
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Manuel
M
Toledano
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Raquel
R
Osorio
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Inmaculada
I
Cabello
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Estrella
E
Osorio
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Manuel
M
Toledano-Osorio
Faculty of Dentistry,Dental Materials Section,University of Granada,Colegio Máximo de Cartuja s/n,18071 Granada,Spain.
Fátima S
FS
Aguilera
D000328:Adult; D003188:Composite Resins; D001840:Dental Bonding; D003731:Dental Caries / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D003763:Dental Leakage / Q000000981:diagnostic imaging / Q000473:pathology; D003804:Dentin / Q000187:drug effects* / Q000473:pathology*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D018613:Microscopy, Confocal; D008964:Molar, Third; D010539:Permeability / Q000187:drug effects; D019279:Resin Cements / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012235:Rhodamines; D014089:Tooth Remineralization; D055815:Young Adult
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D019279:Resin Cements; D012117:Resins, Synthetic; D012235:Rhodamines; C061499:Ketac-Bond; C067790:Vitrabond; C029773:rhodamine B
confocal; dentin; ionomers; remineralization; sealing