A Answers (3)
American Dental Association answeredMany people opt for metal dental crowns. That's because metal dental crowns are considered by many to be very durable and can last for many years. If you are in need of a dental crown, your dentist will inform you that crowns are made from several types of materials, including metal alloys, ceramics, porcelain, composite resin, or a combination of these materials.
Metal dental crowns have been around for a long time and are still quite common, though tooth-colored dental crowns have gained popularity in recent decades.
Metal crowns have a gold or silver look depending on what type of metal they contain. The ones containing gold are usually gentle on nearby teeth and well tolerated but also cost more. Both types of metal crowns resist corrosion, tarnishing and breakage over time.
Some people shy away from metal crowns because they don’t look like natural teeth and the metal may show when you smile. Also the base metals used in these types of dental crowns cause allergic reactions in some, as well as possible discomfort when the crown is exposed to hot or cold food and liquids.
Saul Miller, Dentistry, answered
Metal crowns are commonly advised for the second molar areas of the mouth. There use minimizes the chance of fracture of a porcelain covering on the crown, and can be kinder to the involved tooth, supporting periodontal tissues, the bite and opposing tooth. They are usually placed in areas that are not seen by the outside world and therefore do not pose an esthetic compromise. In fact, a metal crown (full cast) is better than a porcelain fused to metal crown on which the porcelain has fractured. The benefits far outweigh the supposed esthetic compromise of not having a porcelain tooth where nobody sees it.