The purpose of this study was to evaluate the effect of five primers [Super-Bond CH Monomer (SB), Clearfil Ceramic Primer, Alloy Primer, M.L. Primer, and AZ Primer] and two undercoating opaque resins [Super-Bond CH (S-opaque) and Ceramage Pre-opaque (C-opaque)] on the bonding of a resin composite veneering material to a ceria-stabilized tetragonal zirconia polycrystals/alumina nanocomposite (Ce-TZP/Al2O3). Disk-shaped specimens of Ce-TZP/Al2O3 were sandblasted with alumina and primed. The undercoating opaque resins and resin composites were subsequently applied to the specimen, and then light cured. After 5000 thermocycles at 4 degrees C and 60 degrees C, shear bond strengths were determined. Data were analyzed using analysis of variance, Tukey Kramer honest significant difference test, and Student t test (n = 10, alpha = 0.05). With the exception of SB/S-opaque, all S-opaque groups exhibited significantly higher bond strengths than C-opaque groups. The use of S-opaque resin is recommended when veneering frameworks made of Ce-TZP/Al2O3. (C) 2017 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V.