SHEAR BOND STRENGTHS OF 6 BONDING SYSTEMS USING THE PUSHOUT METHOD OFIN-VITRO TESTING

The newest generation of bonding systems consolidates multiple compone nts into fewer containers in order to simplify clinical procedures and save clinicians time. Six newer adhesive systems (Scotchbond Multi-Pu rpose Plus, PROBOND, OptiBond FL, Prime & Bond, One Step, and Tenure Q uik) were tested for in vitro shear bond strength (SBS) of a hybrid co mposite to both superficial and deep dentin at 24 hours and 6 months e mploying a pushout test method. Results showed significant differences in SBS between superficial and deep dentin for both 1-day and 6-month values for all adhesive systems except Tenure Quik. The SBS of OptiBo nd FL increased significantly for both superficial and deep dentin aft er 6 months' storage in 37 degrees C water. None of the other adhesive systems showed a significant change in SBS at 6 months. There appear to be several advantages to the testing method.