A root canal treatment saves a damaged or infected tooth. It targets the inner pulp, which contains nerves and blood vessels. When inflamed or infected, this pulp causes pain. A dentist numbs the area, makes a small opening, and removes the pulp. Then, they clean, disinfect, and seal the canals within the tooth's root. Often, a crown or filling is placed on the tooth afterward for reinforcement. Root canals are usually painless thanks to modern anesthetics, and they can preserve your natural tooth for years to come.