Understanding the concern
Questions about root canal safety often trace back to the “focal infection” theory promoted in the early twentieth century. The theory suggested that bacteria trapped in a treated tooth could cause disease elsewhere in the body. The research used to support that idea was later found to be unreliable, and the theory was abandoned by mainstream medicine and dentistry.
What current evidence shows
There is no valid scientific evidence that a properly performed root canal causes cancer or other systemic disease. Modern endodontic treatment is designed to remove inflamed or infected tissue, disinfect the internal canal system, and seal the space to help prevent reinfection.
The American Association of Endodontists describes root canal treatment as an evidence-based, safe, and effective way to address infection and save natural teeth. You can review its current root canal safety resources for additional detail.
Your treatment decision
Every dental procedure has considerations that depend on the tooth, your health, and the diagnosis. Dr. Moore will explain the findings, recommended treatment, reasonable alternatives, and expected follow-up so you can make an informed decision.
Reliable clinical guidance should be based on current evidence—not claims built on research that cannot be reproduced.