02/25/2026
Myth 2: Root canal treatment causes illness.
Information you may find on the Internet or elsewhere, claiming that if you receive a root canal treatment that you’re more likely to become ill or contract a systemic disease in the future simply isn’t true. This false claim was based on long-debunked and poorly designed research conducted nearly a century ago, long before modern medicine understood the actual causes of many diseases. There is no valid, scientific evidence linking root canal treatment to cancer or disease elsewhere in the body. In fact, modern research has shown that patients with multiple endodontic treatments had a 45 percent reduced risk of cancer. (Tezal M, et al. Dental Caries and Head and Neck Cancers. JAMA Otolaryngol Head Neck Surg 139(10):1054-60, Oct. 2013.). aae.org