Author/Authors :
Daneshpooy, Mehdi Tabriz University of Medical Sciences, Tabriz , Ajami, Amir Ahmad Tabriz University of Medical Sciences, Tabriz , Jafari Navimipour, Elmira Tabriz University of Medical Sciences, Tabriz , Savadi Oskoee, Siavash Tabriz University of Medical Sciences, Tabriz , Abed Kahnamoui, Mehdi Tabriz University of Medical Sciences, Tabriz , Lotfi, Mehrdad Tabriz University of Medical Sciences, Tabriz
Abstract :
Background and aims. Present study was designed to compare the bonding strength of resin-modified glass ionomer (RMGI) and composite resin to mineral trioxide aggregate (MTA), MTA mixed with Na2HPO4 (NAMTA), and calcium-enriched mixture (CEM).
Materials and methods. Thirty specimens of each CEM, NAMTA, and MTA were prepared. Composite and RMGI restorations were then placed on the samples (15 samples in six subgroups). Shear bond strength was assessed using univer-sal testing machine. Data were analyzed with two-way ANOVA and post-hoc Tukey test. To compare the bond strength in subgroups, one-away ANOVA was applied. Significance level was set at P < 0.05.
Results. Bond strength was significantly higher to composite samples compared to RMGI samples (p<0.001). The differ-ence in bond strength of composite samples between MTA and CEM subgroups (P=0.026) as well as MTA and NAMTA subgroups (P= 0.019) was significant, but the difference between NAMTA and CEM subgroups (P=0.56) was not signifi-cant. The differences in bond strength in subgroups of RMGI group were not significant (P>0.05).
Conclusion. Regarding shear bond strength to the tested substrates, composite was shown to be superior to RMGI. The bond of resin composite to MTA was weaker than that to CEM and NAMTA.
Keywords :
shear bond strength , MTA , resin-modified glass ionomer , Resin composite
