Crowns are restorations that cover the entire surface of a tooth. Crowns become necessary when there is insufficient tooth structure remaining to adequately restore a tooth using routine dental filling materials or when the tooth structure remaining is weakened and a crown is needed to prevent further breakdown or fracture.
Crowns can also be used to improve the appearance (aesthetics) and strength of a tooth in the anterior part of the mouth to improve the smile.
Crowns are also used to support missing teeth in a bridge (see Bridges).
There are a number of different materials that can be used in the construction of a crown. These may include gold, ceramic or porcelain fused to metal. Prefabricated crowns for primary teeth are made from stainless steel.
The procedure for a crown on an adult tooth, requires at least two visits. The first visit is an extended appointment in which the tooth is trimmed down to allow for the thickness of the final restoration. Impressions are taken at this appointment and a temporay crown is made and fitted. The impression is sent away to the laboratory on the Sunshine Coast. Once the finished crown has returned from the technicians, the crown is cemented at the second visit.
The laboratory we use is Australian owned. You can find out more about Ray Sharkey at http://www.oraldesign.net.au/ray-sharkey/
A crown may be advised following root canal treatment. Root treated teeth can be prone to fracture as often these teeth are quite broken down when needing root canal treatment. A crown will protect the root filled tooth from further breakdown and improve the longevity of the tooth.