Endodontics, or root canal therapy, is employed when the nerve supply to a tooth has been irreversibly affected by damage or decay. It is a way to prevent or help resolve a dental infection and save a natural tooth from extraction. A root canal is performed when there is enough sound root and crown structure remaining to eventually restore form and function to the involved tooth.

Root canal therapy involves cleaning and shaping each canal, and then filling them with a special inert material. Following this they are sealed to prevent any subsequent infection. Once root canal therapy has been completed, the tooth should be fully restored as recommended.