Evaluation of Shear Bond Strength of Zirconia, E-max, and 3D-Printed Composite Resins with Various Resin Cements

Objective: This study aimed to evaluate the shear bond strength of zirconia, E-max, and 3D-printed composite resin when bonded with Panavia V5 and ResiCem EX cements. Materials and Methods: Shear bond strength was tested on six material-cement combinations: zirconia, E-max, and 3D-printed composite resin, each bonded with Panavia V5 and ResiCem EX. A total of 24 discs were prepared from each material, with 10 specimens in each group. The bonding interface was examined using a digital optical microscope. Shear bond strength was measured with an Instron universal testing machine, and statistical analysis was performed using two-way and one-way ANOVA. Shear bond strength was tested on six material-cement combinations: zirconia, E-max, and 3D-printed composite resin, each bonded with Panavia V5 and ResiCem EX. Results: The highest shear bond strength was observed in 3D-printed composite resin bonded with Panavia V5 (20.74 MPa), significantly higher than Zirconia bonded with ResiCem EX (13.9 MPa, p = 0.010). No significant differences were noted between the remaining material-cement combinations. Conclusion: 3D-printed composite resin demonstrated superior bond strength compared to zirconia and E-max, with Panavia V5 showing potential as a reliable cement for clinical applications. These findings underscore the potential of 3D-printed composites in restorative dentistry.