Oral Function Improves Interfacial Integrity and Sealing Ability Between Conventional Glass Ionomer Cements and Dentin
Metadatos
Afficher la notice complèteAuteur
Toledano Pérez, Manuel; Osorio Ruiz, Raquel; Cabello Malagón, Inmaculada; Osorio Ruiz, María Estrella; Toledano Osorio, Manuel; Sánchez Aguilera, FátimaEditorial
Microscopy Society of America
Materia
Confocal Ionomers Dentin Remineralization Sealing
Date
2017-02Referencia bibliográfica
Toledano Pérez, M.; et al. Oral Function Improves Interfacial Integrity and Sealing Ability Between Conventional Glass Ionomer Cements and Dentin. Microscopy and Microanalysis, 23(1): 131-144 (2017). [http://hdl.handle.net/10481/46739]
Patrocinador
Project MAT2014-52036-P was supported by the Ministry of Economy and Competitiveness (MINECO) and the European Regional Development Fund (FEDER).Résumé
The aim 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. Load cycling improves sealing
capability and remineralization at the cement-dentin interface, as porosity and
nanoleakage diminished, in Ketac Bond specimens. In contrast, samples treated with
Vitrebond Plus attained 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. With 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.