Abstract
Bond strength of a dental adhesive resin cement with 20 commercial dental casting alloys was evaluated by tensile and three-point flexture tests. The specimens were stored in water at 37℃ for 24 fours before the tests. The alloys were also subjected to the bending test to determine the modulus of elasticity, elastic limit and 0.2% proof stress, and the relationships between these mechanical properties and the bond strength were examined. The bending bond strength expressed by the peeling debond force by bending was significantly different among the alloys used while no significant differences were found in the tensile bond strength. The debonding occurred in a manner of cohesive fracture through the cement in all cases. Multiple regression analysis showed that the peeling debond force was dependent on the 0.2% proof stress and modulus of elasticity of the alloys used, but that the tensile bond strength was independent of them.
