Abstract
This study aimed to evaluate the Shear Bond Strength (SBS) and durability of different resin cements used for cement-retained restorations between zirconia crowns and titanium abutments. A total of 36 zirconia cubes and 324 titanium cylinders were employed in this study. Accordingly, 6 groups were assigned according to the used resin cement: three self-etching types (RU, AI, GMP), two self-adhesive types (IS, GM) and one unfilled type (SB). Each group was further divided into 3 sub-group based on storage condition (n = 10): 24-hour water storage at 37 °C, 5,000 thermocycles, and 10,000 thermocycles respectively. SBS testing employed a universal testing machine to quantify the force required for material fracture at the interface, followed by failure mode analysis. Two-way ANOVA showed significant influences of storage conditions and bonding agents on SBS values (p < 0.05), except for IS and GMP (p > 0.05). The SBS values of AI and RU showed a downward trend, while SB and GM showed an upward trend after 10,000 thermocycles. The SBS values of GM and GMP were significantly different in the 24-hour water storage but not after thermocycles. Within the limitations of the current study and based on the findings, the following can be concluded: (1) SBS was significantly influenced by both bonding agent type and storage condition; (2) Bonding systems containing HEMA and 10-MDP exhibited high initial strength but declined significantly after thermocycling; (3) IS, GM, and GMP demonstrated stable bond durability.