The use of all-ceramic restorations will increase the depth of translucency and light transmission across the entire restoration.53 However, some of the zirconiabased systems (Cercon, DCS-Precident) utilize a whitecolored
core, which may limit their indications from an esthetic standpoint. Another system (Lava) uses a Y-TZP core that is relatively translucent and, at the same time, may mask underlying discolored abutments. Moreover, it can be colored in 1 of 7 shades, corresponding to the Vita-Lumin shade guide.