Composite inlay/luting resin bond strength — surface treatment effects

Purpose: To investigate the effect of surface treatments on the bond strength between two resinʹ composite inlay materials and their luting materials. Materials and methods: A notched disc specimen design was used to evaluate the torque to fracture: test specimens consisting of two half notched disc specimens bonded together, controls consisting of complete resin composite material specimens. Results: Both surface treatment and bond resin application had a significant influence on interfacial bond strength — the torque required to initiate failure being expressed as a percentage of the value required to fracture the control specimens. Conclusion: The results allow conclusions to be drawn regarding the attainment of optimal bonding between the resin composite inlays and luting materials investigated.