The crown, dental - An artificial replacement for the crown of a decayed, discoloured, or broken tooth. A crown made from porcelain is usually used on front teeth, but back teeth need the greater strength of a crown made from gold or porcelain fused to metal.
A crown may be fitted by filing the tooth to form a peg and cementing the crown over the top of it. For a badly decayed or weakened tooth, it may be necessary to remove the natural crown, perform root-canal treatment, then fit the artificial crown on to a post that is cemented in the root canal. For details on how crowns are fitted, see the illustrated box below.
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