Crowns are normally needed in situations where the tooth has lost a large part of its normal function and appearance, mainly due to extensive dental caries, or following a root canal Therapy.

Several dental materials are used to fabricate crowns depending on the tooth location and condition. Crowns can be made out of metal, porcelain fused to metal, Zirconium, or all-ceramic (porcelain) material, depending on the tooth condition and location.