There are different types of permanent dental crowns that are made with porcelain with metal, ceramic, resin, all porcelain and metal. Dental crowns can be made out of metals such as chromium or nickel which are base-metal alloys, palladium or gold alloy. As a less stronger material, resin dental crowns are not as expensive or durable as its counterparts while the dental crowns made from porcelain fused to metal look more natural and can be chosen for the back or the front teeth. Durable and long lasting, metal dental crowns are strong and are equipped to withstand wear and tear. Dental crowns that are made completely with porcelain or ceramic match the natural colour of the teeth and are suitable for people who have an allergy to metals. Ceramic dental crowns can be chosen for the upper and lower front teeth. While being fitted for a dental crown, a temporary crown made of stainless steel or acrylic would be created in a dentist's office, while a permanent dental crown is made at a dental lab.