Dentists who wish to provide patients with excellent dental restorations will often choose or recommend Zirconia crowns.
These crowns are preferred over conventional PFM's (Porcelain fused to metal) or full-gold crowns due to their superior strength, durability, and excellent aesthetics.
Many dentists exclusively use zirconia over all-ceramic restorations, particularly when restoring a single tooth. Zirconia crowns require shoulder or chamfer margins for best results.
They may be fabricated from solid full-contour zirconia, high translucent zirconia or layered zirconia. High translucent zirconia and layered zirconia can be either screw-retained or cemented.
Most dental practices are switching from the conventional PFM crowns and moving towards the use of zirconia for creating fixed dental restorations. Because zirconia crowns and bridges possess excellent esthetics and are virtually indestructible, zirconia is becoming the most popular material for making dental crowns and other restorations.
The advantages of Zirconia crowns are they are highly biocompatible, as the smooth surface helps to reduce plaque accumulation. Layered zirconia crowns are extremely durable. Even though the porcelain used for layering does not have the strength of solid zirconia, they are designed to bond with the zirconium substructure, making chipping or fracturing extremely rare. The material also promotes a healthy tissue response.
Due to a wide variety of factors including chemical composition and processing requirements, there are many ways zirconia can be manufactured to suit the needs of the patient. This customization minimizes the margin for error and ensures excellent fit for each individual.
Zirconia is suitable for patients with metal allergies or who would prefer to have metal-free restorations.
Zirconia advantages over PFM is that it is metal-free, which prevents darkening around the gingival area. This eliminates the possibility of metal margins becoming exposed due to gum recession.
The translucent nature of this material can transmit the color of adjacent teeth and it is manufactured in a wide variety of shades, making it easy to accurately match the color of the patient’s natural teeth.
Zirconia crowns do not transmit hot and cold in the same way as conventional PFMs.