Table 1. Composition of primers and universal adhesive.

Trade name (abbreviation)	Composition	Manufacturer
Metal/Zirconia Primer (MZ)	Tertiary butyl alcohol, methyl isobutyl ketone, phosphonic acid acrylate, benzoylperoxide	Ivoclar Vivadent, Schaan, Liechtenstein
Z-PRIME Plus (ZP)	Carboxylic acid monomer (BPDM), HEMA, ethanol, organophosphate monomer (10-MDP)	Bisco, Schaumburg, IL, USA
Zirconia Liner (ZL)	MMA, 10-MDP, 4-methoxyphenol (HQME)	Sun Medical, Shiga, Japan
Scotchbond Universal adhesive (SU)	Organophosphate monomer (10-MDP), dimethacrylate resins (BisGMA, etc.), HEMA, Vitrebond copolymer, filler, ethanol, water, initiators, silane	3M ESPE, St. Paul, MN, USA

BPDM, biphenyl dimethacrylate; HEMA, hydroxyethyl methacrylate; BPDM, biphenyl dimethacrylate; 10-MDP, 10-methacryloyloxydecyl dihydrogen phosphate; MMA, methyl methacrylate; HQME, hydroquinone monomethyl ether.