Primers for Bonding Zirconia to Titanium With Resin Cements

Objectives: The purpose of this study was to examine the effects of different primers on the bond strength of resin cements between zirconia (Aadva Zirconia NT, GC) and pure titanium (JIS type2, Furuuchi Chemical).
Methods: Zirconia disk and pure titanium rod specimens (n=10/gr) were air-abraded with 50-µm alumina at 0.2 MPa or 0.4 MPa, respectively, and then treated with one of five primers {Scotchbond Universal Plus Adhesive (SUPA, 3M ESPE), G-Multi Primer (GMP, GC), Clearfil Ceramic Primer Plus (CCPP, Kuraray Noritake Dental), Monobond Plus (MBP, Ivoclar Vivadent), or Metal Primer Z (MPZ, GC)}. Within each primer group, one of four resin cements, namely, {RelyX Universal Resin Cement (RURC, 3M ESPE), G-CEM LinkForce (GCLF, GC), Panavia V5 (PV5, Kuraray Noritake Dental), or Multilink Automix (MLAM, Ivoclar Vivadent)} was used to bond a zirconia disk to a titanium rod. Tensile bond strengths were measured after 24h-storage at 37°C (TC0) or after 10,000 thermal cycles at 4–60°C (TC10,000). Means±SDs of tensile bond strengths are listed in the table. Data were statistically analyzed using two-way ANOVA, and the same superscript letters at each TC were not significantly different by Tukey-Kramer tests (p>0.05).
Results: The bonding strength of resin cements between zirconia and titanium were generally higher at TC0 than at TC10,000. Bonding strengths also varied among combinations of primers and resin cements. Regardless of resin cement, the MPZ primer yielded significantly higher bond strengths at TC10,000 than did the same manufacturer’s multipurpose primer or universal bond (p<0.05).
Conclusions: Among tested primers, MPZ generally provided more durable bonding of resin cements between zirconia and titanium across testing conditions.