A crown is a type of dental restoration which completely caps or encircles a tooth or dental implant. Crowns can be made from many materials, which are usually fabricated using indirect methods. Permanent crowns can be made from all metal, porcelain-fused-to-metal, all resin, or all ceramic.


Types of Crowns

1.    Metal Crowns

Metals  used in crowns include gold alloy, other alloys (for example, palladium) or a base-metal alloy (for example, nickel or chromium). Compared with other crown types, less tooth structure needs to be removed with metal crowns, and tooth wear to opposing teeth is kept to a minimum. Metal crowns withstand biting and chewing forces well and probably last the longest in terms of wear down. Also, metal crowns rarely chip or break. The metallic color is the main drawback. Metal crowns are a good choice for out-of-sight back teeth.

2.    Porcelain-fused-to-metal dental crowns

These crowns can be color matched to your adjacent teeth (unlike the metallic crowns). However, more wearing to the opposing teeth occurs with this crown type compared with metal or resin crowns. The crown's porcelain portion can also chip or break off. Next to all-ceramic crowns, porcelain-fused-to-metal crowns look most like normal teeth. However, sometimes the metal underlying the crown's porcelain can show through as a dark line, especially at the gum line and even more so if your gums recede. These crowns can be a good choice for front or back teeth.

3.    All-resin dental crowns are less expensive than other crown types. However, they wear down over time and are more prone to fractures than porcelain-fused-to-metal crowns.

4.    All-ceramic or all-porcelain dental crowns

These crowns provide the best natural color match than any other crown type and may be more suitable for people with metal allergies. However, they are not as strong as porcelain-fused-to-metal crowns and they wear down opposing teeth a little more than metal or resin crowns. All-ceramic crowns are a good choice for front teeth.

5.    Temporary versus permanent.

Temporary crowns can be made in your dentist's office whereas permanent crowns are made in a dental laboratory. Temporary crowns are made of acrylic or stainless steel and can be used as a temporary restoration until a permanent crown is constructed by the dental laboratory.

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  • dr ritz

    dr ritz 17 - September - 2011, at 03:18 AM

  • Kamini, If the tooth is broken to quite an extend, then only capping will not serve the purpose. If the tooth structure of the broken tooth is less, then post and core procedure can be done. Post in the tooth will provide strength to the tooth. Dental bridge can also be given to the patient by taking support of the adjacent teeth but in this, the adjacent teeth will also be grinded. You can discuss with your dentist about post and core procedure. Root canal treatment is done before giving post and core to the tooth. Even if the damaged tooth is not hurting, then also you need to get root canal procedure done for it before post and core to avoid infection later on.

  • kamini shukla

    kamini shukla 17 - September - 2011, at 01:09 AM

  • my one tooth is missing when i fall down and seccond time fall down my cannine tooth is break half i was went to the doctor he give me a metal and ceramic crown on my teeth but before one week i again fall down on the road and my crown is not damage but my tooth between the front and canninen is half break she telling to me your tooth is not give full support your teeth and give the power full support i want to take a two sides of the tooth but my damage tooth are not hilling what i do

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