Dental crowns refer to the restoration of teeth using materials that are fabricated by indirect methods which are cemented into place. A crown is used to cap or completely cover a tooth. They are tooth restorations that protect damaged, cracked or broken down teeth. A crown strengthens your existing damaged tooth so as to preserve its functionality. Dental crowns are also commonly known as caps because a crown sits over your existing tooth covering the entire outer surface analagous to how a baseball cap would cover your head.