The health of your mouth and your heart are not separate conversations.
The next time a dentist tells you to floss more, it might be worth listening — not just for the sake of your teeth, but for your heart. A new scientific statement from the American Heart Association, published in the journal Circulation on December 16, 2025, draws a clear and updated line between gum disease and a significantly elevated risk of heart attack, stroke, atrial fibrillation, and heart failure. The message, in plain terms: the health of your mouth and the health of your cardiovascular system are not separate conversations.
The statement, titled "Periodontal Disease and Atherosclerotic Cardiovascular Disease," updates a previous AHA position from 2012 and incorporates a growing body of research that has accumulated in the years since. Atherosclerotic cardiovascular disease — the umbrella term for conditions caused by arterial plaque buildup, including coronary heart disease, stroke, peripheral artery disease, and aortic aneurysms — is the leading cause of death worldwide. The new statement argues that periodontal disease deserves a seat at the table when clinicians and patients think about managing that risk.
Andrew H. Tran, a pediatric cardiologist and director of the preventive cardiology program at Nationwide Children's Hospital in Columbus, Ohio, chaired the writing group behind the statement. His framing was direct: your mouth and your heart are connected. Gum disease and poor oral hygiene can allow bacteria to slip into the bloodstream, setting off a chain of inflammation that can damage blood vessels over time. Brushing and flossing, he said, are not just cosmetic habits — they are part of protecting the heart.
Periodontal disease is more common than many people realize. It affects more than 40 percent of American adults over the age of 30. It begins as gingivitis — the familiar redness and swelling that comes from plaque buildup along the gumline — and can progress to periodontitis, where the gums pull away from the teeth and form pockets that harbor bacteria. In its most severe form, the disease destroys the bone supporting the teeth, causing them to loosen and fall out, often requiring surgery to address.
The condition is not evenly distributed. It is more prevalent among men, older adults, people with low physical activity, and those facing adverse social conditions — lower incomes, food insecurity, limited access to dental care. It also clusters with other cardiovascular risk factors: high blood pressure, obesity, diabetes, and smoking. That overlap raised an obvious question for researchers: are these two diseases simply running together because they share the same underlying risk profile, or is there something more direct going on?
The evidence now suggests both. While the shared risk factors are real, the statement points to an independent association between periodontal disease and cardiovascular outcomes — one that holds even after accounting for the usual suspects. The biological pathways are still being mapped, but two broad routes have emerged. The first is direct: bacteria from infected gum tissue can enter the bloodstream and cause vascular infections. The second is indirect: the chronic, low-grade inflammation that periodontal disease generates appears to accelerate the same arterial damage that drives heart disease.
Studies cited in the statement found a striking difference in cardiovascular risk based on something as simple as how often a person brushes their teeth. Adults who brushed once a day or less carried a 10-year ASCVD risk of about 13.7 percent. Those who brushed three or more times daily had a risk closer to 7.35 percent — roughly half. Inflammatory markers were also lower in the more frequent brushers. The numbers are observational, not causal proof, but they are hard to ignore.
What the statement does not claim is equally important. There is no confirmed cause-and-effect relationship between gum disease and heart disease. And there is no direct clinical evidence yet that treating periodontal disease will prevent cardiovascular events. The AHA is careful on this point: the association is real and independent, but the intervention trial data needed to close the loop has not yet been done. What the authors do say is that reducing lifetime exposure to inflammation — which periodontal treatment can accomplish — appears to be beneficial in the broader context of cardiovascular risk reduction.
For people who already carry one or more cardiovascular risk factors, the statement recommends regular dental screenings and targeted periodontal care as part of a comprehensive prevention strategy. The call for more research is explicit: long-term studies and randomized controlled trials are needed to determine whether treating gum disease can meaningfully alter the course of cardiovascular disease. Until those trials are completed, the picture remains compelling but incomplete — a strong association waiting on the evidence that would make it a clinical directive.
Notable Quotes
Your mouth and your heart are connected. Brushing, flossing and regular dental checkups aren't just about a healthy smile — they're an important part of protecting your heart.— Dr. Andrew H. Tran, pediatric cardiologist and director of preventive cardiology, Nationwide Children's Hospital, Columbus, Ohio
The Hearth Conversation Another angle on the story
What actually changed between the 2012 statement and this one?
The core association was already on the table in 2012, but the new data has made the independent link harder to dismiss. More studies have now controlled for the shared risk factors — diabetes, smoking, obesity — and the connection still holds.
What does "independent association" actually mean in practice?
It means the relationship between gum disease and heart disease isn't just because both tend to show up in people who smoke or have high blood pressure. Even when you strip those out statistically, the link persists. That's what makes it worth taking seriously.
Why would bacteria in the mouth affect the heart?
When gum tissue is infected and inflamed, it becomes a gateway. Bacteria can slip into the bloodstream through that compromised tissue. Once circulating, they can trigger inflammation in blood vessels — the same kind of inflammation that accelerates arterial plaque buildup.
The statement says there's no proof that treating gum disease prevents heart attacks. Doesn't that undercut the whole argument?
It's a real limitation, and the authors don't hide it. But absence of proof isn't proof of absence. The trials to test that question haven't been done yet. What we do know is that reducing chronic inflammation — which periodontal treatment does — seems to matter for cardiovascular health broadly.
The brushing frequency data is striking. Is that actually meaningful?
It's observational, so you can't say brushing more causes lower heart risk. But a near-doubling of 10-year ASCVD risk between people who brush once a day versus three times a day is a signal worth noting, especially when inflammatory markers track the same direction.
Who is most at risk here?
The overlap is significant — men, older adults, people with lower incomes or limited healthcare access, and anyone already managing diabetes, hypertension, or obesity. These are the same populations already carrying elevated cardiovascular risk, which makes the oral health piece even more consequential for them.
What should a cardiologist actually do with this information?
The statement suggests that patients with cardiovascular risk factors should be getting regular dental screenings as part of their care. It's a coordination problem — cardiology and dentistry don't usually talk to each other, and this is an argument that they should.