Given these requirements, removal of good tooth structure still remains much more conservative when compared to the requirements for PFM restorations, which must allow for multiple layers of porcelain in addition to a metal substructure. Aesthetic Concerns When zirconia crowns were first introduced in 2...
adhere well to your tooth. One of the reasons why PFM crowns were the preferred choice earlier is that the metal surface bonds well with the tooth and holds the crown in place.Zirconia also has this property. These crowns require less tooth removal than many other types of dental crowns. ...