Bonding
This stage was divided into three phases.
Tooth‐related phase was commonly shared for the two groups. It included removing the provisional restoration and cleaning the surfaces of the teeth, after isolating the area by a rubber dam. The veneer parts were tried in the patient's mouth to ensure an appropriate fit. The final step was cleaning and etching the teeth surfaces by using 37% phosphoric acid, drying them thoroughly, and applying the bonding agent.E.max‐related phase comprised treating the e.max's internal surface by etching it with 9% hydrofluoric acid, after which a silane layer was applied and yet another one to achieve shiny surfaces.High‐translucent zirconia‐related phase encompassed sandblasting with particles of aluminum oxide coated with silica of the internal surfaces for the zirconia for 20 s (2.8 bar, 10 mm standoff distance). After drying, the application of a double bonding agent containing MDP for both types of restoration was done.Finally, we put light‐cured resin cement for both types. A light cure was selected because it possesses more color stability than dual cure cement. The suggestion of utilizing light curing was introduced by Wassell et al. (