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Porcelain

Types of crowns

Several materials can be used to make a dental crown. There is no universally ideal material. The choice depends on many factors including the location of the tooth and the aesthetics that are required.

Gold

orA crown made of gold alloy is the one that lasts the longest. It resists very well to chewing forces, it rarely breaks, and it causes very little wear to opposing teeth. The gold's metallic colour is the main disadvantage of this type of crown and this factor reduces its popularity. However, gold would be a good choice for a molar that does not appear when a person smiles. Gold crowns are made in a laboratory with an impression that the dentist takes of the tooth; it is therefore necessary to protect the tooth with a temporary crown during this period of a few weeks.

 

 Gold and Porcelain

or-porcelaineA crown made of porcelain fused to gold is a more aesthetic crown than the one made of gold alloy. Porcelain can make a crown look very similar to a natural tooth. The gold part, which is located below the porcelain, helps give strength to the tooth. Porcelain is very strong, but is less strong than gold and can fracture. Sometimes the gold under the porcelain may show, especially at the gum level. This type of crown is also fabricated in the laboratory with an impression of the tooth, and a temporary crown is needed during that period of fabrication.

 

 Porcelain

porcelaineAn all ceramic crown is the most aesthetic crown because it is made of porcelain only. Its shape and colour can match the qualities of natural teeth very closely. This crown is however less solid than gold crowns or porcelain fused to gold, although new varieties of porcelain which are more and more resistant are coming out on the market. Porcelain only crowns are recommended for anterior (front) teeth to favour beauty and offer a better looking smile. Porcelain crowns are generally fabricated in a dental laboratory.

 

 

Cerec

A CEREC crown is also made of porcelain only. This technology allows the dentist to engineer himself the crown following an electronic impression. The design and preparation are assisted by computer. The great advantage of CEREC is that a second appointment is not required to install the crown after its making in a dental laboratory since CEREC technology ensures the production of the crown in a few minutes by the dentist himself. But even though CEREC's porcelain is becoming more and more beautiful, dental laboratory's porcelains are still more aesthetic and resemble more the natural appearance of teeth.

A temporary or provisional crown is made by the dentist himself and has a lifespan of a few weeks. It is made of acrylic or stainless steel, and serves as a temporary restoration until the permanent crown is made by a dental laboratory. A temporary crown is not strong and can break easily.