Teeth have two main parts: the crown (the part you can see) and the roots (the part that is under the gums). Inside the root of each tooth is a hollow space filled with pulp. The pulp contains blood vessels, nerves, and connective tissue that are responsible for forming the surrounding dentin and enamel during tooth development. Although the pulp is important during development of the tooth, it is not necessary after the tooth has developed.
Root canal treatment is necessary when the pulp becomes inflamed or infected. This happens when a tooth has decay, deep fillings, or cracks. By removing the inflamed and infected pulp and replacing it with a special filling, the tooth can usually last a lifetime. The alternative is to have the tooth extracted. Endodontic treatment can usually be performed in one or two visits and involves the following steps:
1. Local anesthetic is administered to ensure that the tooth is completely numb. A protective sheet called a dental dam is then placed over the area to isolate the tooth and keep excess water out of the mouth.
2. An opening is made in the crown of the tooth and the canals are found with the aid of the operating microscope. Instruments called files are used to clean the pulp from the pulp chamber and canals.
3. After the canals are cleaned and shaped, the canals are filled with a biocompatible material called gutta-percha, along with an antibacterial sealer.
4. The procedure is finished by placing either a temporary or permanent filling to seal the opening. You may then need to return to your dentist within a few weeks to have a crown or other restoration placed on the tooth to protect it and restore it to full function.