Get the Facts on Root Canals

In this article

• What is a Root Canal?
• Why Does Tooth Pulp Need to Be Removed?
• What Damages a Tooth's Nerve and Pulp in the First Place?
• What Are the Signs That a Root Canal Is Needed?
• What Happens During a Root Canal?
• How Painful Is a Root Canal?
• What Should One Expect After the Root Canal?
• How Successful Are Root Canals?
• Complications of a Root Canal
• Cost of a Root Canal
• Alternatives to a Root Canal
• Root Canal Prevention

What Are the Signs That a Root Canal Is Needed?

Sometimes no symptoms are present; however, signs you may need a root canal include:

• Severe toothache pain upon chewing or application of pressure
• Prolonged sensitivity/pain to heat or cold temperatures (after the hot or cold has been removed)
• Discoloration (a darkening) of the tooth
• Swelling and tenderness in the nearby gums
• A persistent or recurring pimple on the gums

What Happens During a Root Canal?

A root canal requires one or more office visits and can be performed by a dentist or endodontist. An endodontist is a dentist who specializes in the causes, diagnosis, prevention, and treatment of diseases and injuries of the human dental pulp or the nerve of the tooth. The choice of which type of dentist to use depends to some degree on the difficulty of the root canal procedure needed in your particular tooth and the general dentist's comfort level in working on your tooth. Your dentist will discuss who might be best suited to perform the work in your particular case.

The first step in the procedure is to take an X-ray to see the shape of the root canals and determine if there are any signs of infection in a surrounding bone. Your dentist or endodontist will then use local anesthesia to numb the area near the tooth. Anesthesia may not be necessary, since the nerve is dead, but most dentists still anesthetize the area to make the patient more relaxed and at ease.

Next, to keep the area dry and free of saliva during treatment, your dentist will place a rubber dam (a sheet of rubber) around the tooth.

An access hole will then be drilled into the tooth. The pulp along with bacteria, the decayed nerve tissue and related debris is removed from the tooth. The cleaning out process is accomplished using root canal files. A series of these files of increasing diameter are each subsequently placed into the access hole and worked down the full length of the tooth to scrape and scrub the sides of the root canals. Water or sodium hypochlorite is used periodically to flush away the debris.