CAD/CAM System Porcelain Fused to Zirconia (PFZ)
Nowadays, the best choice in order to obtain dental crowns which look as natural as possible is the porcelain fused to zirconium crown.
The zirconium oxide is a very resistant white material. It can be used for dental work on the posterior teeth but it requires support on more post teeth.
The phenomenon specific for porcelain fused to metal crowns is never encountered in the case of zirconium crowns because zirconium allows light to pass through.
They are recommended especially for dental work on the frontal side where the teeth are much more visible than in any other parts of the dentition.