Abstract
This study evaluated the mechanical properties and bond strengths of four commercially available adhesive resin cements, Bistite Resin Cement(BR), Imperva Dual(ID), Panavia 21(PT)and Super-Bond C & B(SB), to bovine tooth substrates and two types of precious dental alloys.The effect of adhesive primer for metal on the shear bond strengths of resin cements to silver-palladium-copper-gold and type IV gold alloys was investigated.Three resin cements except for SB showed almost the same compressive and transverse strengths after one day's immersion in 37℃ water.The transverse strength of BR immersed in water for six months decreased to one-third compared with that immersed for one day.The transverse strength and modulus of elasticity of SB were about a half of those of other resin cements.The tensile bond strengths of four resin cements to bovine enamel were approximately 13MPa.For dentin, SB, PT, BR and ID showed a bond strength of approximately 14, 11, 6 and 5MPa, respectively.Adhesive luting agents showed excellent shear bond strength of approximately 30〜40MPa to both precious alloys after 50, 000 thermocycles consisting of alternately immersing the specimen in 4℃ and 60℃ water for one minute each.The application of adhesive primer for metal on sandblasted precious dental alloys was effective in greatly improving the bond strengths of resin cements compared with unprimed alloys.
