Dental cavities

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Tooth anatomy

Caries; Tooth decay; Cavities - tooth

Destroyed tooth structure does not regenerate. However, the progression of cavities can be stopped by treatment. The goal is to preserve the tooth and prevent complications.

In filling teeth, the decayed material is removed (by drilling) and replaced with a restorative material such as silver alloy, gold, porcelain, or composite resin. Porcelain and composite resin more closely match the natural tooth appearance, and may be preferred for front teeth. Many dentists consider silver amalgam (alloy) and gold as stronger, and these materials are often used on back teeth. There is a trend to use high strength composite resin in the back teeth as well.

Crowns are used if decay is extensive and there is limited tooth structure, which may cause weakened teeth. Large fillings and weak teeth increase the risk of the tooth breaking. The decayed or weakened area is removed and repaired. A covering jacket or "cap" (crown) is fitted over the remainder of the tooth. Crowns are often made of gold, porcelain or porcelain fused to metal.

A root canal is recommended if the nerve in a tooth dies from decay or from a traumatic blow. The center of the tooth, including the nerve and blood vessel tissue (pulp), is removed along with decayed portions of the tooth. The roots are filled with a sealing material. The tooth is filled and a crown may be placed over the tooth if needed.

Treatment often preserves the tooth. Early treatment is less painful and less expensive than treatment of extensive decay. Anesthetics -- local (novacaine), nitrous oxide (laughing gas), or other prescription medications -- may be required in some cases to relieve pain during or following drilling or other treatment of decayed teeth. For those who fear dental treatment, nitrous oxide in combination with anesthesia may be preferred.

• tooth abscess
• fractured tooth
• discomfort or pain
• tooth sensitivity
• inability to bite down on tooth

• Call your dentist if you have a toothache.
• Call your dentist for a routine cleaning and examination if you have not had one in the last 6 months to 1 year.

Review Date: 08/12/2005
Reviewed By: Johanna Jacobs, D.D.S., General and Cosmetic Dentistry, New York, NY. Review provided by VeriMed Healthcare Network.