Ceramics-Silikáty 65, (4) 401 - 409 (2021)

This study evaluated the surface roughness and shear bond strength (SBS) of highly/ultra-translucent monolithic zirconia ceramics subjected to different mechanical surface pre-treatments. A total of 225 square samples of three zirconia materials (KATANA Zirconia UTML (ML), DD Bio ZX2 (DB), and DD cube X2 (DC)) were used. The surface roughness and SBS values of the materials with respect to a resin cement (Panavia V5) were investigated after subjecting the samples to surface treatments using air abrasion particles of two types (aluminium oxide or glass microbeads) and sizes (50 or 110 μm). The data were analysed using a two-way analysis of variance, followed by Tukeys post-hoc test for multiple comparisons. The highest mean surface roughness of the DC and ML ceramics were obtained after abrasion with the 110-μm Al₂O₃ particles (2.954 ± 0.266 μm and 2.850 ± 0.296 μm, respectively). The mean SBS values of the DB, DC, and ML ceramics could be arranged in the following order based on the treatments: 110-μm Al₂O₃ particles, 50-μm Al₂O₃ particles, 110-μm glass microbeads, 50-μm glass microbeads, and the control. The combination of air abrasion with the 50-μm Al₂O₃ particles and treatment with a 10-MDP primer resulted in the most durable bonding of the zirconia ceramics.