Effect of conditioning and 1 year aging on the bond strength and interfacial morphology of glass-ionomer cement bonded to dentin

Abstract Objective The purpose of this study was to determine the bond stability and change in interfacial ultra-structure a conventional glass-ionomer cement bonded dentin, with without pre-treatment using polyalkenoic acid conditioner. Methods occlusal dentin surfaces six teeth were ground flat. Glass-ionomer either or conditioning. sectioned into 1-mm2 stick-shaped specimens. specimens obtained randomly assigned two groups different periods storage water: 1 week year. micro-tensile strength (?TBS) determined for each time. Additional prepared Transmission Electron Microscopy (TEM); they produced prior conditioning same way as ?TBS test. Results There no significant difference conditioned non-conditioned (p?>?0.05). failures appeared be mixed nature, although aging caused more areas cohesive than adhesive failure both groups. TEM observation showed an intermediate layer, matrix-rich layer partially demineralized group. Significance Aging did not reduce use