Bonding Durability of Two Acrylic Resin Adhesives to Ti-6Al-7Nb alloy

Objectives: The current study was aimed to evaluate the bonding durability of two self curable resin adhesives to a titanium alloy primed with two metal conditioners. Methods: Cast disk specimens made of a titanium alloy (Ti-6Al-7Nb, T-Alloy Tough) were air-abraded with 70 µm alumina then bonded with four combinations of two self curable resin adhesives (Multi-bond, MB; Super-Bond C&B, SB) and two metal conditioners (Alloy Primer, AP; Metal Link, ML). Unprimed specimens were used as controls. Shear bond strength after thermocycling (4-60˚C, 20,000 cycles) was determined for evaluation of bonding durability and compared statistically. Results: The AP-SB and ML-SB groups recorded the greatest bond strength (21.8 MPa for AP-SB, 19.6 MPa for ML-SB, p<0.05). The bond strength of the MB groups was significantly (p<0.05) lower than that of the SB groups, irrespective of the type of conditioner. Conclusions: Within limitation in the current study, the combination of the SB resin and metal conditioner is recommended for bonding the Ti-6Al-7Nb alloy.