Phosphate Monomers on Bonding of Resin

The purpose of the present study was to evaluate the effects of four experimental primers on bond strength between a self-curing luting agent and silver-palladium-geld alloy. The experimental primers were in mixed solutions of a thiouracil primer (Metaltite) and a phosphate primer (Eprieord, PM, PE, or PP), which were designated as Meta]tite/Eprieord, Metaltite/PM, Metaltite/PE, and MetaltitelPP respectively. Three primers (Metal Primer II, V-Primer, and Al]oy Primer) were also prepared as controls. Alumina-blasted metal alloys were bonded with acrylie rods. After 5,000 thermoeycles, the maximum shear bond strength was obtained with MetaltitelPE (27.8 ± 2.4 MPa) and MetaltitefEpricord (27,6 ± 5.9 MPa), followed by MetaltitelPP, Alloy Primer, Metaltite, Metaltite/PM, Metal Primer II, V-Primer, and Epricord, PE, PM, and PP showed the lowest bond strength, Results of this study revealed that the combined use ofa thiouracil monomer anda phosphate monomer improved adhesive bonding. In this light, clinieians should pay attention to the types of functional menomers dissolved in a primer when fabricating resin-bonded prostheses,