Crowns are full coverage restorations used to cover a tooth that is either likely to break or too broken down to be restored with a filling. They are most commonly placed after a root canal treatment or when a large filling has worn out.
Even after a filling has been placed in a large cavity, a tooth is still likely to break. A broken, chipped or cracked tooth is a serious matter and much more difficult to treat. A crown will prevent this, while also improving your smile. Crowns are a great option to prevent further damage to a weakened tooth as well.