Root Canal Therapy

What is root canal therapy? It’s a procedure used to treat problems of the tooth’s dental pulp, or soft core. This core contains nerves, blood vessels, and connective tissue. At one time, teeth with abscessed, or infected, nerves were removed.¹ Now, in 95 percent of cases of pulpal infection, the natural tooth can be saved with root canal therapy. Therapy usually requires one to three appointments.¹ Without treatment, the infection of the dental pulp can spread to the bone around the tooth, making it unable to hold the tooth in place.²

What Causes Pulpal Nerve Damage?

The most common causes of pulpal nerve damage are:

• Physical irritation generally brought on by aggressive tooth decay (a cavity) that reaches down to the nerve or through deep fillings. This allows harmful bacteria to reach the nerve, resulting in infection and decay.¹

• Trauma, such as a blow to a tooth or the jaw, that damages sensitive nerve tissue within the tooth²

What Are the Symptoms of Pulpal Nerve Damage?

The symptoms of pulpal nerve damage can vary from person to person. The most common ones include:

• Pain in the tooth when biting down

• Tooth pain while chewing

• Oversensitivity of the teeth with hot or cold drinks²

• Facial swelling¹

These symptoms may resemble other oral health conditions. Consult your dentist for an accurate diagnosis.³

What Does the Root Canal Procedure Involve?

Treatment begins with an injection of local anesthetic to numb the affected area.² The tooth crown, or top, is opened to expose the pulpal tissue so that it can be removed. The area surrounding and containing the pulpal tissue is carefully cleaned, enlarged, and shaped¹ so that a permanent filler can be used to prevent any further infection and discomfort. After filling, a crown is made to complete the restoration of the natural tooth.²

The procedure is generally spread over more than one visit to ensure that the infected pulp and any bacteria have been adequately drained.²   Soft-tissue inflammation around the tooth may cause some discomfort in the days following surgery. An over-the-counter analgesic may help.¹

If you continue to care for your teeth and gums and get regular checkups, your treated tooth could last a lifetime.¹ To further protect it, avoid using it to chew hard foods.²

¹ “Root Canal (Endodontic) Treatment: Frequently Asked Questions.” American Dental Association. http://ada.org/public/topics/root_canal_faq.asp Accessed 2008.

² “What Is a Root Canal?” Academy of General Dentistry, February 2007. www.agd.org/public/oralhealth/Default.asp?IssID=326&Topic=R&ArtID=1310 Accessed 2008.

³ “What Causes a Toothache?” Academy of General Dentistry, February 2007. www.agd.org/public/oralhealth/Default.asp?IssID=337&Topic=T&ArtID=1362#body Accessed 2008.