A crown, also known as a cap, is a hollow, artificial tooth. It is used to cover a damaged or broken-down tooth. If your tooth is salvageable; a crown can be used to restore its shape, appearance and function. You may need a crown if you have a root canal treated tooth, broken or cracked tooth or a large filling.
A crown can be placed over a weakened tooth to hold it in place and prevent crumbling or breaking. Dental crowns can benefit teeth with large fillings by covering them and supporting your tooth.