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A crown is a cap that is placed over a tooth and held in place by dental adhesive or cement.
Crowns are used for several reasons:
as a protective cover for badly decayed teeth or fractured teeth as a permanent restoration for teeth with large fillings to correct minor problems in natural teeth like spacing and irregular shape or severe discolouration.
Crowns can be made from a variety of materials. They can be made from plastic, ceramic or metal alloys. A combination of metal and ceramic is also possible to maximise strength and simulate the appearance of natural teeth.