Most crowns made today are made from a porcelain called zirconia. They can also be made from other types of porcelain and metal, if needed. The shade and type of porcelain are selected to provide the patient’s tooth with as much strength, function, and aesthetics as possible. A patient chooses to restore their tooth with a crown restoration when a filling restoration cannot properly restore the tooth back to function. Crowns can also be used to create or enhance the aesthetics of a smile.