Does gum health affect the heart? What the evidence says

What could inflammation in your mouth have to do with your heart? The question may seem unrelated at first, but research over the past 30 years has shown a consistent relationship between gum disease and cardiovascular disease. The existence of this relationship is now widely accepted. The debate concerns something else: is this a cause-and-effect relationship, or do the two conditions occur together because they share the same underlying risk factors?

What is the relationship based on?

Periodontitis is long-term inflammation of the gums and the bone surrounding the teeth. Although it may appear to involve a small area in the mouth, in advanced stages the total area of the inflamed surface can reach the size of a palm. This surface behaves like a continuously open wound: bacteria and molecules that signal inflammation can enter the bloodstream.

Long-term follow-up studies show that cardiovascular events are more common in people with periodontitis. This difference persists even after known risk factors such as smoking, age, blood pressure and cholesterol are taken into account. A scientific statement from the American Heart Association, updated at the end of 2025, brings together this body of evidence.

Proposed mechanisms

• Direct pathway: Bacteria from gum pockets can enter the bloodstream. Some studies have found traces of oral bacteria inside arterial plaques.
• Indirect pathway: Long-term inflammation creates a general inflammatory burden in the body. This burden may accelerate plaque formation in the artery wall.
• Shared underlying factors: Smoking, diabetes, physical inactivity and dietary patterns increase the risk of both diseases. Part of the relationship may result from these shared factors.

Where the evidence ends

Caution is needed here. Showing that a relationship exists is not the same as showing that one condition causes the other. At present, we do not have a large-scale study that definitively demonstrates that gum treatment reduces the risk of heart attack or stroke. Some studies report improvements in vascular function and inflammatory markers after gum treatment, but it has not yet been shown whether these intermediate findings translate into actual cardiac events.

Practical notes for people with heart disease

• If you take blood thinners, be sure to tell your dentist. The decision about whether the medication should be stopped is made through a joint assessment by your doctors.
• If you have a prosthetic heart valve, a history of infective endocarditis or certain congenital heart conditions, antibiotic prophylaxis may be needed before certain procedures. This decision is made together with your cardiologist.
• If you have recently had a heart attack, it may be recommended that you wait before undergoing non-urgent dental procedures.
• If you have bleeding or receding gums, bad breath or loose teeth, do not consider these temporary problems.

The basics of protecting oral health have not changed

While the heart connection continues to be debated, the way to prevent gum disease remains the same: brush your teeth twice a day, clean between your teeth, stop smoking and have regular checkups. These are not new or special recommendations. However, given that gum disease can progress without symptoms in its early stages, the importance of checkups increases.

This content is for general information and does not replace a personal examination. Treatment decisions should only follow a clinical assessment.