Objective: To measure and compare shear bond strength of three dual-cure composite resin cements; EXP (experimental cement), PAF (Panavia F 2.0, Kuraray), and MAM (Multilink Automix, Ivoclar Vivadent) to leucite reinforced feldspathic ceramic (Ivoclar Vivadent) with (WLI) and without light irradiation (W/OLI).
Method: Forty square blocks (10 x 10 x 3 mm) were prepared
for each cement group from the ceramic material (total n=120).The top surfaces
of blocks were acid
etched with hydrofluoric acid (4.8%) for 60 seconds. Cylindrical composite
samples (2.1 mm in diameter, 3 mm in height) were prepared and bonded to the ceramic
surfaces with one of the study cements in a special alignment apparatus, where
a load of 1000 g
was applied for 10 minutes. Half of the specimens were light cured, while the
other half was prepared and kept in a darkroom without light exposure. The
light-cure specimens were irradiated for 40 s from three sides for a total of
120 s. The
specimens were stored in deionized water at 370 C for 24 h and thermocycled for 10,000
cycles between 5 to 600C with 60 s dwell time. Shear bond strengths were
determined at a cross-head speed of 0.5 mm/minute. Shear forces were converted to
MPa by dividing the failure load by the bonding area. Data were analyzed with
ANOVA and Tukey's HSD test.
CEMENTS Bond strength [Mpa]±SD WLI W/OLI PAF 13.9±4.5a 9.6±4.0be MAM 10.4±4.1b 10.8±4.1bd EXP 17.9±4.5c 6.4±2.9e Conclusion: Self-curing capacity of dual-cure resin cements significantly
affects their bonding performance to ceramic surface.
Bond strength [Mpa]±SD
Conclusion: Self-curing capacity of dual-cure resin cements significantly affects their bonding performance to ceramic surface.
Keywords: Adhesion, Cements, Ceramics, Curing lights and Dental materials
See more of: Dental Materials 3: Ceramic-based Materials and Cements