Crowns are also known as ‘caps’.
When a tooth is damaged extensively by decay or trauma, a filling may not be suitable to restore the tooth and a crown is then the choice of treatment.
Also for aesthetic reasons, a crown can cover a discoloured tooth.
A crown is designed to cover the part of the tooth that shows above the gum. If that part of the tooth is not sufficient to carry a crown, the root of the tooth can be used.
After the tooth is prepared and shaped, an impression is taken. The impression is sent to the dental technician who then designs amd makes a crown to fit the tooth and sends it back to the dentist.
The crown is then cemented onto the tooth.
Between the visits a temporary crown covers the prepared tooth.
Inlays or onlays are crowns that do not cover the whole surface of the tooth but are designed to replace a big part of it.
There are many types of crowns. The most common are listed below:
- Porcelain bonded crowns: Consists of a metal core with porcelain fused on top. They are used to restore front and back teeth.
- Ceramic crowns: are crowns with no metal core for better aesthetics. They can be used for back and front teeth and nowadays are very strong.
- Porcelain crowns: these crown is made of porcelain and is used for front teeth.
- Gold crowns: are made from a mixture of gold and other metal alloys. These crowns are ideal for patients who grind their teeth or where there is very little tooth remaining.