A dental crown looks like a tooth-shaped cap that is designed specifically to fit perfectly onto the weakened tooth. Crowns may be advised when there is limited tooth tissue available or following Root Canal Treatment. They are recommended to cover a tooth to restore its shape and size as well as improving its appearance. Crowns can be made from a range of materials including metal, porcelain, ceramic, zirconia and resin. Two appointments are necessary, first to prepare the tooth and the second to fit the crown.