Do Root Canals Cause Cancer? What Current Evidence Says
Current scientific evidence does not support a causal link between properly performed root canal treatment and cancer. This article explains the evidence, where the concern came from and what root canal treatment involves.
Where did the concern come from?
The concern can be traced to an early 20th-century idea known as focal infection theory. It suggested that bacteria associated with teeth could cause disease elsewhere in the body. The American Association of Endodontists explains that the studies behind this idea were flawed and could not be reproduced reliably. The claim later reappeared in online health information.
What does current evidence say?
Available scientific evidence has not established root canal treatment as a cause of cancer. This conclusion should not be turned into an absolute guarantee that dental treatment is free from risk. A dentist must assess the tooth, explain the relevant options and limitations, and confirm whether treatment is suitable.
What does root canal treatment involve?
Root canal treatment, also called endodontic treatment, is used when the pulp inside a tooth is inflamed or infected. The affected tissue is removed, and the root canals are cleaned, shaped, filled and sealed. A filling or crown may also be needed. The exact treatment plan and number of appointments depend on the tooth and clinical findings.
For information about assessment and treatment at our private Worthing practice, see our root canal treatment service page.
When should I speak to a dentist?
Tooth pain, swelling, prolonged sensitivity or a damaged tooth can have different causes. These signs do not by themselves confirm that root canal treatment is needed. A dentist should explain whether the tooth may be retained, the alternatives, likely appointments, possible restoration such as a filling or crown, and costs after examination.
If you have concerns about your individual cancer risk, speak to an appropriate medical professional.
This article provides general information and does not replace personal dental or medical advice.
