Root canal treatment doesn’t cause pain — it relieves it !
Some background will be helpful. As you will note from the illustrations, a space inside the tooth called the pulp chamber houses the root canal system and pulp — the living tissue that keeps the tooth vital (alive). The pulp includes blood vessels, nerves and connective tissues, and, during childhood, creates the surrounding hard tissues of the tooth.
Endodontic treatment (“endo” – inside; “dont” – tooth), commonly known as root canal treatment, is needed when the pulp becomes inflamed or infected. The causes could be deep tooth decay, repeated dental procedures on one tooth (replacing a large filling, for example), or traumatic damage such as a crack, chip or even a root fracture. Gum disease can also give rise to root canal problems necessitating root canal treatment.
Any of these issues can result in acute inflammation of the pulp, which causes swelling and pressure inside the tooth (that has nowhere to go), leading to tooth pain and, eventually, irreversible damage to the pulp. Once the pulp dies, the pain may subside initially, sometimes to return as an acute (painful) infection spreading into the periapical tissues (“peri” – around; “apex” – end), particularly the bone. It could also become a chronic (long-standing) infection with symptoms ranging from mild to severe.
Generally speaking, whatever the cause of root canal or pulpal disease, root canal or endodontic treatment will be necessary to save the tooth. All dentists receive training in endodontic treatment and can perform root canal procedures, but often a general dentist will refer individuals who need endodontic treatment to an endodontist, a root canal specialist.
Endodontists are dentists who have completed an additional two or more years of advanced residency training in the diagnosis and management of diseases and disorders of the dental pulp, and in the diagnosis of dental pain; their focus is therefore on saving teeth. In order to make a proper assessment and accurate diagnosis of which tooth is affected and exactly what is causing the pain, a thorough history and examination is necessary, together with a radiographic picture (x-ray) of the tooth or area.
Your dentist or endodontist will check your medical history and current medications to ensure your health and treatment safety. If you are very nervous, an oral sedative or anti-anxiety medication may be helpful — discuss the options with your dentist or endodontist ahead of time.