Do Root Canals Cause Health Problems?
June 28, 2026
If you’ve searched this question, you’ve probably come across claims online that root canals can lead to heart disease, arthritis, or other chronic illness. It’s an understandably scary idea, especially if you’re facing a root canal yourself. The good news: this claim isn’t supported by modern science. Here’s where it came from, why it persists, and what the actual research says about root canals and your overall health.
How Concerns About Root Canals Began
This myth traces back to something called the focal infection theory, which gained popularity in dentistry in the early 20th century, roughly the 1910s through 1940s. The theory proposed that bacteria trapped inside a root canal-treated tooth could leak toxins into the bloodstream and trigger disease elsewhere in the body, everything from arthritis to heart problems was blamed on treated teeth at the time.
This idea led to a troubling era in dentistry where healthy, treatable teeth were pulled unnecessarily in an attempt to “cure” unrelated health conditions. However, the studies behind the theory were poorly designed by today’s scientific standards, and as dental and medical research advanced, the theory was thoroughly discredited. Despite being debunked decades ago, it resurfaced more recently through internet articles and a popular documentary, which is largely why the question still comes up today.
What the American Dental Association and Endodontists Say
Major dental organizations, including the American Association of Endodontists, have reviewed decades of research on this topic and consistently reached the same conclusion: there is no valid scientific evidence linking root canal-treated teeth to systemic disease. Root canal therapy remains one of the most predictable and well-researched procedures in modern dentistry because its purpose is to remove infection, relieve pain, and preserve your natural tooth.
At First Hill Dental Center, Dr. Kevin Suzuki and Dr. Sukhdev Singh follow evidence-based treatment protocols and use modern diagnostic technology to provide safe, effective root canal therapy. By treating the source of the infection and sealing the tooth, the goal is to protect your long-term oral health while helping you avoid unnecessary tooth loss. Learn more about our Endodontic Treatment services to see how we help Seattle patients save infected teeth with comfortable, personalized care.
Leaving an infected tooth untreated is what poses the greater health risk. A dental infection can spread to the surrounding bone and soft tissues and, in rare cases, lead to more serious complications. Prompt treatment removes the infected pulp, seals the tooth, and helps prevent the infection from progressing, making root canal therapy an important step toward restoring both your oral health and peace of mind.
What Current Research Actually Shows
It’s worth being precise here, because there is a related but distinct area of legitimate research: the connection between untreated, chronic oral infections (like an abscessed tooth) and broader inflammatory health. Some studies have explored possible associations between long-standing, untreated apical periodontitis (infection at the root tip) and conditions such as cardiovascular disease or complications in pregnancy, largely due to low-grade systemic inflammation and bacteria temporarily entering the bloodstream.
This research is about the danger of leaving an infection untreated, not about the root canal procedure itself causing harm. In fact, some of this same research indicates that successfully completing root canal treatment reduces the inflammatory burden in the body, which supports overall health rather than undermining it. In other words, treating the infection is protective; ignoring it is the actual risk factor.
Why the Myth Persists
A few things keep this misconception alive:
- It plays into legitimate and healthy interest in whole-body wellness, since oral health genuinely is connected to overall health in some ways
- Old, disproven claims are easy to find and share online, and they tend to spread faster than the nuanced science that corrects them
- Anxiety about dental procedures makes people more receptive to alternative explanations for avoiding treatment
It’s a reasonable instinct to want to understand how a dental procedure might affect your whole body. The honest answer is that a properly performed root canal is a safe, well-established way to treat infection and preserve your natural tooth.
What This Means for Your Treatment Decision
If your endodontist has recommended a root canal, avoiding the procedure out of concern for systemic health risk isn’t supported by current evidence, and delaying treatment allows the actual infection in the tooth to continue, which carries its own risks to your oral and general health. If you have specific health conditions or concerns, the right move is to talk with your dentist directly. They can walk through your individual case, medical history, and any precautions that make sense for you.
Root Canal Care at First Hill Dental Center
At First Hill Dental Center, Dr. Kevin Suzuki and Dr. Sukhdev Singh take patient questions about treatment safety seriously and are happy to walk through exactly what a root canal involves, what the evidence says, and what to expect during recovery. Our First Hill, Seattle practice uses modern techniques and imaging designed to treat infection thoroughly and help your natural tooth last for years to come.
FAQs
1. Can a root canal cause health problems like heart disease or arthritis?
No. Current scientific evidence does not support a link between root canal treatment and chronic diseases such as heart disease, arthritis, or other systemic illnesses. Major dental organizations consider root canals a safe and effective treatment.
2. Why do some people believe root canals are harmful?
The belief comes from the early 20th-century focal infection theory, which claimed treated teeth could cause disease elsewhere in the body. Modern research has disproven this theory, but the misconception continues to circulate online.
3. Is it safer to remove a tooth instead of getting a root canal?
Not necessarily. When a tooth can be saved, a root canal is often the preferred option because it removes the infection while preserving your natural tooth. Extraction may be recommended only when the tooth cannot be restored.
4. What happens if an infected tooth is left untreated?
An untreated tooth infection can spread to nearby tissues and bone and may contribute to broader health complications. Prompt treatment helps eliminate the infection and reduce these risks.
5. Can a root canal improve overall oral health?
Yes. By removing infection and sealing the tooth, a root canal helps stop the spread of bacteria, preserves your natural tooth, and supports better long-term oral health.