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Addressing the Rumor: Are Root Canals Safe or Can They Cause Cancer?

June 9, 2025

a digital image of a root canal

The number of myths that continually circulate about root canals is unbelievable. One of the most common yet dangerous rumors is that this restorative procedure can cause cancer. The lack of evidence associated with this claim proves that it’s untrue, but unfortunately, many people are too fearful to pursue treatment – a problem that only causes further oral health decline. Before falling victim to this myth, learn the truth about root canals and why you do not need to worry if your dentist tells you that you need one.

How Did the Rumor About Root Canals Causing Cancer Get Started?

Nearly a century ago, a doctor named Weston A. Price stated that, according to his research, root canals were known to cause “body-wide conditions.”

After studying patients who received this type of treatment and who possessed other health issues, he removed their affected teeth, only to implant them into rabbits. Recognizing these furry creatures developed the same health problems as humans, he went on to state that various pathways allow bacteria from a person’s teeth to travel to areas throughout the body.

This led to the declaration that root canals cause cancer – a myth countless dentists and scientists continue to debunk.

Unfortunately, even some modern-day dentists still try to claim that Price’s discovery and conclusion are true.

While it is likely that some individuals with cancer received root canal treatment at some point in their life, there is no evidence proving there is a connection between the two.

Should You Worry if You Need a Root Canal?

No, there is no reason to be fearful about your overall health when learning that you need a root canal. This procedure is commonly performed by countless dental professionals and endodontists whose goal is to save natural teeth and help patients out of pain.

Although there is a common misconception that a root canal causes extreme pain, it does not. Local anesthesia is administered before treatment begins, and the source of the discomfort – the infection – is removed.

Throughout the procedure, your dentist will make sure that you are completely comfortable as they remove the pulp of the tooth – the central area housing the infection – and stabilize it for continued use.

It’s easy to assume the information you find on the internet is true, especially if it appears to come from a reliable source. The best way to ensure greater peace of mind before any kind of dental procedure is to talk to your dentist. The questions you ask can provide the clarity you need to feel confident about treatment.

About the Author
Dr. Barry Miller takes a patient-centered approach to dentistry. When treating a patient with severe dental decay, a root canal may be the only way to save their tooth from extraction. While debunking the many myths associated with this type of invasive procedure, Dr. Miller and our team at Northwest Family Dental in Marysville reassure each patient that treating the inside of a tooth is completely safe and one of the most effective ways to help them keep their natural smile. Unsure about some of the information you’ve heard regarding root canals, contact us at (937) 642-3434 to learn the truth.