If you’ve heard that root canal treatment can cause cancer, you’re certainly not alone. This claim has circulated for years, particularly online, and it can understandably make people nervous about a procedure that is often recommended to save a damaged or infected tooth. Fortunately, there is no credible scientific evidence that root canals cause cancer. The idea is a persistent myth rather than a medical fact.
Where Did the Root Canal and Cancer Myth Come From?
The rumor can be traced back to research from nearly a century ago. In the early 1900s, a physician named Weston Price proposed that bacteria trapped inside root canal-treated teeth could release toxins and contribute to diseases elsewhere in the body.
While these claims attracted attention, the research did not meet modern scientific standards. Subsequent research has not established a connection between root canal treatment and cancer.
Modern dentistry also looks very different from dentistry a century ago. Today, dentists use advanced diagnostic tools, sterilization procedures, and evidence-based techniques to clean and seal the inside of an infected tooth.
Are Root Canals Safe?
Root canal treatment is considered a safe and effective dental procedure. In fact, its purpose is to remove infected or damaged pulp from inside a tooth, clean the root canals, and seal the tooth to prevent bacteria from getting back inside.
When a tooth’s pulp becomes infected because of deep decay, a crack, trauma, or another problem, leaving it untreated can allow the infection to spread. Root canal treatment addresses the source of the infection while allowing you to keep your natural tooth.
Like any medical or dental procedure, a root canal can have potential complications, but cancer is not considered a complication of root canal treatment.
What Does the Research Say About Root Canals and Cancer?
Large-scale scientific evidence has not shown that people who receive root canals have an increased risk of developing cancer. Claims that root canals cause cancer often rely on outdated research, misunderstandings about bacteria, or anecdotes rather than evidence from modern medical studies.
It’s also important to distinguish between an infection that originates in a tooth and cancer. A dental infection can cause pain, swelling, and other potentially serious complications if left untreated, but that does not mean it causes cancer.
Why Treating an Infected Tooth Matters
If your dentist recommends a root canal, it’s usually because the pulp inside your tooth has become infected or irreversibly damaged. Without treatment, the infection may worsen and potentially develop into an abscess or spread to surrounding tissues.
Root canal therapy can remove the infected tissue, clean the inside of the tooth, and help preserve your natural smile. In many cases, it can also prevent the need for extraction.
If you’ve been avoiding a recommended root canal because of concerns about cancer, talk with your dentist about where those concerns came from and what the procedure involves. Having accurate information can make it much easier to feel comfortable with your treatment plan.
Root canals have a long history of helping patients save natural teeth, and there is no scientific basis for the claim that they cause cancer.
About the Practice
Snow Dental in Austin is led by Dr. Zahara Munis, who takes a calm, compassionate approach to dentistry and focuses on making patients feel heard, respected, and comfortable. Dr. Munis earned her dental doctorate from the University of Kentucky College of Dentistry after studying at the University of Houston. She has continued her education in areas including sedation dentistry, dental implants, and cosmetic dentistry, while remaining especially passionate about helping patients feel at ease during their dental care.
Call us at (512) 371-7239 or schedule your appointment online.