Statement of the problem: Debonding is a common cause of failure in zirconia-based
restorations. Despite the use of resin cements and surface treatments, the rate of success remains
to be questioned.
Purpose: The purpose of this study was to evaluate the effect of surface treatment using a
silica coating (Co-Jet) method with different luting cements on the shear bond strength to zirconia
samples. The hypothesis was that surface treatment with different luting cements will influence the
bond strength at the ceramic-cement interface.
Materials and Methods: In this study 30 zirconia samples were constructed and underwent
surface treatment using a silica coating method (Co-Jet system). Zirconia samples were then bonded
to composite samples using different luting agents (Bifix QM, Panavia 2.0 and Multilink Automix).
Samples underwent a thermocycling aging process before shear bond strength was tested.
Results: The highest shear bond strength was recorded with the Panavia 2.0 group while the
lowest was with the Bifix QM group.
Conclusions: Within the limitations of this study, the use of a Co-Jet sand silica coating system
with Panavia 2.0 showed superior bond strength than the other luting cements.