Dental crowns can be used in a number of different situations. They can repair a tooth that has been broken or worn down, is cracked or suffering from decay. They can treat minor tooth alignment problems and they can be made to match surrounding teeth exactly for that better smile.

Dental crowns can be made of a number of different materials. The crowns that give the best appearance are ones made of full ceramic or full porcelain. They are not as strong as some other types of crown and so are not normally used for rear teeth which are subjected to considerable wear from chewing. These crowns are also suitable for patients who may suffer from allergy to some metals.

The most common type of crown used by dentists is what is known as a PFM (Porcelain Fused to Metal) crown. These are recommended for rear teeth because the metal base is very strong and can withstand the pressure that comes from chewing. Different types of metal base may be used, and these include chromium and nickel. In addition, the porcelain can be fused to silver, gold, or platinum and these sorts of crown are naturally more expensive.

The most expensive Metal Crowns Dental are those made from the metal zirconia. These are immensely strong and can be used for front or back teeth, and they have an excellent appearance which is as good as full ceramic or full porcelain crowns. They can be made from solid zirconia or they can be used as a base for a porcelain veneer. Because zirconia is so strong the crown can be thinner than other types and they won't need so much of the tooth to be removed as other crowns.

Temporary Resin Dental Crowns can also be used and these are usually made from acrylic. These can be fitted while the permanent crown is being crafted in the dental laboratory.

In some patients, crowns will last for their whole life, but in most cases the lifespan is from 10 - 15 years, after which they will need to be replaced. Most problems with crowns are the result of gum disease or decay of the supporting tooth, but crowns can also become chipped or cracked.

Maryland Bonded Bridges popularly known as resin-bonded bridgeare made of plastic teeth and gums supported by a metal system. Metal wings on each side of the bridge are bonded to your existing teeth.
For more details, check http://crownandbridges.com/