Abstract:

Objective To study the influence of three different metal alloy surfaces treated with primer methacryloxy propyl trimethoxyl silane（γ-MPS） coupling agent on the bond strength of Filtek Z350 resin. Methods Total 36 specimens of nickel-chromium（Ni-Cr） alloy, pure titanium（Ti） and aurum-palladium（Au-Pd） alloy, each of 12 pieces produced by lost wax casting method, were divided into 6 groups. After treated with γ-MPS on the bonding surface, experimental group samples were adhered to Filtek Z350 resin, then compared with the surface without γ-MPS treatment. The tensile and shear strength of each group tested and the fracture sections were observed with scanning electron microscope（SEM）. Results Comparing the Ni-Cr alloy and pure Ti experimental group with them in control
group, the shearing strength of the experimental group was higher, and the differences were significant（P<0.001）. The shearing strength of the experimental group and control group of Au-Pd alloy were not significant（P>0.05）. Comparing the experimental groups, the shearing strength of pure Ti was higher than Ni-Cr alloy, both were higher than Au-Pd alloy（P<0.01）. These entire specimens were adhesive fracture. Comparing with the control group, Ni-Cr alloy and pure
Ti experimental group showed more resin juts in the fracture surface, while the Au-Pd alloy in experimental group showed less resin juts. Conclusion γ-MPS can enhance the adhesion between metal and resin, but it is also related to the metal composition. γ-MPS can significantly increase the bond strength of resin and Ti or Ni-Cr alloy, but not the case of Au-Pd alloy and resin.

Key words: primer coupling agent, nickel-chromium alloy, titanium, aurum-palladium alloy, resin, adhesion, shear bond resistance