Removal torque of screw and cement retained cantilever fixed prosthesis on angled abutment after cyclic loading

Materials and methods: Forty Simple Line II fixtures (Dentium, Seoul, Korea) were divided into 4 groups, I.) Cement-retained, straight abutment, I I .) Cement-retained, angled abutment, I I I .) Screw-retained, straight abutment, and IV.) Screw-retained, angled abutment. An anterior cantilever fixed prostheses was casted with non-precious alloy and assembled for all implant components. The removal torque values of the abutment screws were measured using a digital torqued gauge before and after cyclic loading. A cyclic force between 30-300 N was applied at 30 to the long axis of the prosthesis at 14.0 Hz for 5×10 cycles. Two-way ANOVA was used to examine the effect of abutment types and restoration designs on the RTV after cyclic loading (α = 0.05).