Crown restorations are similar to veneers because they, too, are attached to individual teeth. Crowns completely cover the tooth on all sides, helping to correct any problems with alignment. Crowns are used to repair teeth that have undergone root canals or have severe erosion or malposition. The use of crowns is essential in any situation that requires greater strength and aesthetics. Crowns are fabricated from ceramic or ceramic and metal and are indistinguishable from adjacent teeth.