The purpose of this study was to evaluate the efficiency of different functional monomers in three self-adhesive resin cements on bond strength to base metal alloy. Three self-adhesive resin cements [Maxcem elite (MC), Panavia SA luting plus (SA), G-Cem (GC)] and one primer [Clearfil ceramic primer plus (P)] were used in this study. Sixty base metal alloy discs (10 mm diameter, 4 mm thick) were prepared and embedded in dental gypsum. All specimens were sandblasted with 50 μm of alumina for 10 seconds under 3 bar pressure and 10 mm distance. The samples
were randomly divided into six groups (N=10 each) according to different resin cements and either with or without primer application: Group1 (MC), Group2 (SA), Group3 (GC), Group4 (P+MC), Group5 (P+SA) and Group6 (P+GC). A silicone template (2 mm diameter, 4 mm high) was placed on the top of base metal alloy surface. The resin cement was filled into the mold and then light-cured for 40 seconds. All bonded specimens were kept in distilled water at 37oC for 24 hours and subjected to shear bond strength measurement using a universal testing machine at a crosshead speed of 0.5 mm/min. The data were statistically analyzed using two-way ANOVA and Tukey’s test (α=0.05). The
shear bond strengths of Group 1 to Group 6 were 8.15±1.26, 14.74±2.51, 15.08±1.47, 20.83±1.63, 21.57±1.93 and 20.69±2.41 MPa, respectively. The bond strengths of Group 4-6 were significantly higher than those of Group 1-3 (p<0.05). However, Group 1 showed the lowest bond strength (p<0.05) and significantly different from Group 2 and 3. In conclusion, MDP/4MET-containing self-adhesive resin cement showed increased bonding values in base metal alloy interface. The shear bond strength of self-adhesive resin cement was also positively affected by prior application of primer.