IADR Abstract Archives
Bonding of Glass Ionomers to Resin Composite Using Universal Adhesive
Objectives: The aim of this study was to evaluate the shear bond strength of glass ionomers to resin composite with the different application modes of universal adhesive system.
Methods: Two different glass ionomer cements were used: conventional glass ionomer and resin- modifed glass ionomer(N=20). Totally 40 cylinder-shaped glass ionomer specimens were fabricated (diameter:5 mm, height:2mm) using teflon molds and embedded in acrylic resins. Then, a universal adhesive system was applied with two different modes ( etch&rinse and self-etch) and cylinder-shaped composite resin specimens (diameter:3 mm, height:2 mm) were bonded (n=10). All specimens were stored in distilled water for 24 h and subjected to shear bond strength test at a crosshead speed of 1 mm/min using universal testing machine. Debonded surfaces were observed with a steremicroscope under 15x magnification to determine mode of failure. Data were statistically analyzed with two-way ANOVA and Bonferroni tests(p<0,05).
Results: Regarding the different application modes of universal adhesive system, no statistical differences were observed in shear bond strength for conventional glass ionomer cement. However, self-etch application of universal adhesive system showed statistically higher shear bond strength than etch&rinse application for resin-modified glass ionomer cement. Regarding the glass ionomer cements, resin-modified glass ionomer cement showed statistically higher shear bond strength than conventional glass ionomer cement with both modes of universal adhesive. Conventional glass ionomer showed predominantly adhesive failures while resin- modified glass inomer presented mixed failures.
Conclusions: The self-etch mode application of universal adhesive system might be preferred for the adhesion of resin-modified glass ionomer to composite resin.
Methods: Two different glass ionomer cements were used: conventional glass ionomer and resin- modifed glass ionomer(N=20). Totally 40 cylinder-shaped glass ionomer specimens were fabricated (diameter:5 mm, height:2mm) using teflon molds and embedded in acrylic resins. Then, a universal adhesive system was applied with two different modes ( etch&rinse and self-etch) and cylinder-shaped composite resin specimens (diameter:3 mm, height:2 mm) were bonded (n=10). All specimens were stored in distilled water for 24 h and subjected to shear bond strength test at a crosshead speed of 1 mm/min using universal testing machine. Debonded surfaces were observed with a steremicroscope under 15x magnification to determine mode of failure. Data were statistically analyzed with two-way ANOVA and Bonferroni tests(p<0,05).
Results: Regarding the different application modes of universal adhesive system, no statistical differences were observed in shear bond strength for conventional glass ionomer cement. However, self-etch application of universal adhesive system showed statistically higher shear bond strength than etch&rinse application for resin-modified glass ionomer cement. Regarding the glass ionomer cements, resin-modified glass ionomer cement showed statistically higher shear bond strength than conventional glass ionomer cement with both modes of universal adhesive. Conventional glass ionomer showed predominantly adhesive failures while resin- modified glass inomer presented mixed failures.
Conclusions: The self-etch mode application of universal adhesive system might be preferred for the adhesion of resin-modified glass ionomer to composite resin.