Adhesion of various dental luting cements to the mirror-polished surface of metallic dental materials

The purpose of this study was to investigate the tensile bond strength of various commercially-available dental luting cements to the mirror-polished surface of pure titanium compared to those of the surface of Ag-Pd-Cu-Au alloy and gold alloy.Flat surfaces of the three different types of metallic dental materials(JIS Grade 2 Titanium,12％Ag-Pd-Cu-Au alloy and Type 3 gold alloy)were mirror-polished, surface treated and bonded the stainless steel rod using either of resin-based composite luting cement[Panavia® V5 (Kuraray Noritake Dental)],adhesive resin-based composite luting cement[RelyXTM Ultimate(3M ESPE)],4-META/MMA-TBB luting cement[Super Bond®(Sun Medical)], and conventional glass-ionomer based luting cement [HY-Bond GlasIonomer CX (Shofu)]. For Panavia V5, either of Clearfil®Ceramic Primer Plus (Kuraray Noritake Dental) or Alloy Primer (Kuraray Noritake Dental) was applied to the polished metal surface before cementing. ScotchbondTM Universal Adhesive and V-Primer was applied before using Rely-X Ultimate and Super Bond, respectively.The different application methods of Super Bond on tensile bond strength was also investigated. V-Primer/Super Bond indicated the greatest bond strength than the other adhesive for 12％Ag-PdCu-Au alloy.Although V-Primer/Super Bond showed the highest bond strength in both Type 3 gold alloy,the obtained strength was significantly lower than that for 12％AgPd-Cu-Au alloy.For pure titanium,application of the mixture of Quick Monomer(5％ 4-META +95％MMA) and Catalyst V (TBB-O) prior to adhering using Super Bond obtained the enhancement of bond strength. Within the limitation of this study, it can be concluded that the effect of metal priming agent/luting cement to the mirror-polished dental metallic material depends on the type of metallic material.2021博士（歯学）松本歯科大