Crowns come in different shapes and colours.
A crown is a covering for a tooth that needs some structural support or that needs to look more like a tooth again.
If a tooth has discoloured, it may be necessary to cover it with a tooth-coloured crown to disguise the discolouration.
If a tooth is weak either because it has broken down, because it has a large filling in it or it has needed root canal treatment, a crown may be required for structural support to give it a chance of lasting for longer.
Crowns can be tooth-coloured or made from a cast metal; appearing silver or gold in colour.
The options for a tooth will be discussed with you prior to preparing the tooth.