Zirconia vs Porcelain Crowns
Because of their attractive appearance and durability, patients commonly request zirconia or porcelain crowns rather than a metal-based solution. Recently, zirconia has become a more popular alternative to restorations which use porcelain-fused-to-metal (PFM). Dentists sometimes opt to exclusively use an all-ceramic or zirconia restoration. When a single tooth is being restored, this is quite common. Dentists are beginning to use zirconia crowns rather than traditional PFM or all-ceramic options. Zirconia is becoming more popular in its use with crowns and bridges due to the durability and attractive appearance. The material is so strong it can withstand the daily forces associated with chewing.
As the name suggests, porcelain fused to metal (PFM) crowns use both porcelain and metal. The porcelain overlay provides the crown with a tooth-like appearance. The dentist can match the material to the natural teeth adjacent to the restoration. The dark metal color is unfortunately visible at the gum line in some cases. Patients who have receding gums most commonly see this. For patients who want a natural restoration which is also strong and durable, the dentist will typically recommended a PFM restoration.
Zirconia crowns are an exceptionally strong and durable solution for patients. It is reported that zirconia is least three times stronger compared to a porcelain or PFM restoration. Unlike porcelain, zirconia can withstand routine wear and tear without becoming damaged or chipping. Zirconia restorations are so strong they can withstand the extreme forces associated with bruxism or extreme chewing. Monolithic zirconia, which is a single, solid block of zirconia, allows the crowns to be used in the back of the mouth.
Because zirconia is highly biocompatible, it does not trigger an allergic reaction in the body. It is extremely rare, however, some patients report an allergic reaction to PFM crowns. In some cases, the patient is allergic to the alloys used in PFM crowns. Patients who have a known metal allergy should consider a zirconia crown restoration for their damaged tooth. Zirconia is an extremely safe material for dental restorations.
Zirconia is more durable than the ceramics which are used in PFM crowns. Solid zirconia contains more stabilizers than PFM ceramics, meaning it is more durable. In addition, zirconia can endure the forces of chewing and grinding. Zirconia crowns can last a lifetime when they are well maintained and the patient practices good oral hygiene.
Zirconia crowns do not contain a metal lining at the gum line. Porcelain fused to metal (PFM) crowns contain a thin layer of metal under the porcelain at the top of the crown. This metal lining can be especially visible when patients smile an expose the gum line. This is avoided with zirconia crowns as they do not contain any metal. The dentist can easily adjust the color of zirconia crowns to ensure they closely match the natural teeth.
Zirconia has been successfully used in dental restorations for years. Zirconia offers patients a material which has excellent strength, durability, and a natural appearance. Zirconia restorations are quickly becoming more popular than PFM restorations. Patients should schedule an appointment with their dentist to determine if they may be a good candidate for a zirconia crown.