First, let’s go over the basics of this common procedure. A root canal may be recommended by the dentist if the pulp and nerves of one of your teeth become infected or injured. Such an infection usually comes with tooth pain and sensitivity, and if left untreated would lead to the spread of infection and the loss of the tooth. Root canal therapy is a way for the dentist to save the tooth, by going in and removing the affected tooth root, filling the area with medical material, and capping the tooth, leaving the patient with a natural looking, and feeling, of restoration.