influence of 10mdp adhesive system on shear bond strength of zirconia-composite interfaces

Introduction: this in-vitro study investigated the initial 24h bond strength between different composites and zirconia after application of four different adhesive systems. methods: a total of 120 specimens of zirconia (incoris, sirona, germany, bernsheim) were ground with a 165 μm grit rotating diamond disc. thirty specimens were each additionally treated with cimara zircon “cz” (voco gmbh, germany, cuxhaven), futurabond u “fbu” (voco gmbh), futurabond m+ “fbm” (voco gmbh) or futurabond m+ in combination with the dca activator “fbmd” (voco gmbh). one of three different types of composites – bifixse (“bs”), bifixqm (“bq”) or grandioso (“g”) (voco gmbh) – was bonded to ten specimens each in every group. shear bond strength (sbs) was determined in a universal testing machine. statistical analysis was performed with anova and the tukey test. results: fbm and fbmd gave higher sbs than cz and fbu in combination with all tested composites. in comparison to fbu, fbm gave statistically significant increases in sbs with bifixse (19.4±5.7 mpa) (p<0.013) and with grandioso (19.1±4.4 mpa) (p<0.021). none of the other comparisons was statistically significant. conclusion: the new 10-mdp-containing adhesive systems fbm and fbmd increases initial sbs between composites and zirconia in comparison to cz and fbu.