Does a zirconia primer help in improving the bond of resin cement to the zirconia-based restoration?

Yes, zirconia primer (Clearfil Ceramic Primer, Kuraray America; Monobond Plus, Ivoclar Vivadent; Z-Prime Plus, Bisco Dental Products) applied to the sandblasted intaglio surface of a zirconia-based restoration provides better bond strength. Use a zirconia primer in cases with short crown preparations.