What are dental crowns?

Crowns are fixed prosthetic devices. Unlike removable devices such as dentures, which you can take out and clean daily, crowns are cemented onto existing teeth or implants, and can only be removed by a dentist.

How do crowns work?

A crown is used to entirely cover or “cap” a damaged tooth. Besides strengthening a damaged tooth, a crown can be used to improve its appearance, shape or alignment. A crown can also be placed on top of an implant to provide a tooth-like shape and structure for function. Porcelain or ceramic crowns can be matched to the color of your natural teeth.

Other materials include gold and metal alloys, acrylic and ceramic. These alloys are generally stronger than porcelain and may be recommended for back teeth. Porcelain bonded to a metal shell is often used because it is both strong and attractive.

Your dentist may recommend

a Crown to:

• Replace a large filling when there isn’t enough tooth remaining
• Protect a weak tooth from fracturing
• Restore a fractured tooth
• Attach a bridge
• Cover a dental implant
• Cover a discolored or poorly shaped tooth
• Cover a tooth that has had root canal treatment

How are Crowns made?

Before a crown can be made, the tooth must be reduced in size so that the crown will fit over it properly. After reducing the tooth, your dentist will take an impression to provide an exact mold for the crown. If porcelain is to be used, your dentist will determine the correct shade for the crown to match the color of your existing teeth.

Using this impression, a dental lab then makes your crown, in the material your dentist specifies. A temporary crown will be put in place to cover the prepared tooth while the permanent crown is being made.

When the permanent crown is ready, the temporary crown is removed, and the new crown is cemented over your prepared tooth or teeth.

How long do Crowns last?

While crowns can last for several years, they do sometimes come loose or fall out. The most important step you can take to ensure the longevity of your crown is to practice good oral hygiene.

Also, see your dentist and hygienist regularly for checkups and professional cleanings. To prevent damage to your new crown, avoid chewing hard foods, ice or other hard objects.