In the past, crowns have been made of a gold alloy.This is very durable and provides a strong chewing surface. But a gold crown stands out among its natural, white neighbors and does not give an aesthetically pleasing appearance. Cosmetic dentistry has advanced in huge strides over recent years, so that now the material of choice for a crown is dental porcelain.
What is dental porcelain?
It’s a glass-like ceramic material that comes in many shades of white. A qualified cosmetic dentist can give you a porcelain crown that nobody will ever identify as a crown. He will match the exact shade of porcelain to your natural enamel, and will even have the crown made of several subtly different shades of porcelain, to mimic the subtle variations in natural tooth enamel.
Advantages of porcelain :-
It is translucent like natural tooth enamel.
Light can travel through it, but is also reflected back to the viewer from the dental cement holding the crown to the tooth. Similarly, light travels through enamel and is reflected back from the dentin layer beneath. So in both cases, the result is a characteristic white sheen.
It is strong and long-lasting and gives a good chewing surface
It is stain-resistant like glass. The pigmented substances we eat and drink, like cola drinks, blackberries and red wine, do not affect its color as they do our enamel color.Conversely, it is not affected by any teeth whitening procedure. It retains its original shade of white.
A porcelain crown can be:
1. All-porcelain, with porcelain on the outside and a porcelain lining; or
2. Porcelain-fused-to-metal, with porcelain on the outside and a metal lining.
Source Link:- http://bestsyndication.com/?q=node/20252
Friday, December 5, 2008
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