The connection between periodontal disease and cardiovascular disease is one of the most well-established oral-systemic links. People with severe gum disease have approximately 2-3 times higher risk of heart attack, stroke, and other cardiovascular events.
Oral bacteria — including Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans — have been found inside atherosclerotic plaques in artery walls. This means bacteria from the mouth physically travel through the bloodstream and lodge in arterial tissue.
The American Heart Association has acknowledged that periodontal disease is independently associated with atherosclerotic cardiovascular disease. While the exact causal relationship is still being studied, the inflammatory burden from chronic oral infection is believed to contribute to plaque formation and instability.
Periodontal bacteria enter the bloodstream through inflamed gum tissue (especially during brushing, flossing, or chewing). Once in circulation, they can adhere to and invade arterial wall cells, potentially contributing to plaque development.
Chronic oral infection produces a steady stream of inflammatory mediators (CRP, IL-6, TNF-alpha) that systemically promote endothelial dysfunction, plaque formation, and plaque instability — the precursors to heart attack and stroke.
Some oral bacteria produce enzymes that modify blood-clotting proteins, potentially contributing to thrombus formation. P. gingivalis has been shown to promote platelet aggregation in laboratory studies.
- 1Oral bacterial DNA found inside atherosclerotic plaques in coronary arteries.
- 2People with severe periodontitis have 2-3x higher risk of cardiovascular events.
- 3Weekly flossing associated with 22% lower stroke risk in observational studies.
- 4Treating periodontal disease may reduce systemic inflammatory markers (CRP, IL-6).
- 5Oral bacteria can promote platelet aggregation — a key step in blood clot formation.
Found in arterial plaque; promotes inflammation and platelet aggregation
Aggressive pathogen; linked to endocarditis and arterial damage
Motile spirochete; found in atherosclerotic lesions
Associated with infective endocarditis
- Inform your cardiologist about any history of gum disease or dental infections
- Get regular dental cleanings — at least every 6 months, or every 3-4 months if you have active gum disease
- Address bleeding gums promptly — bleeding is never "normal" and indicates active inflammation
- Coordinate care between your dentist and cardiologist, especially before cardiac procedures
- Consider salivary diagnostic testing to identify specific pathogen levels
- Maintain excellent daily oral hygiene: brush 2x/day, clean between teeth daily
Consider salivary testing if you have cardiovascular risk factors (family history, elevated cholesterol, hypertension) and any signs of gum disease. Also valuable before major cardiac procedures.
Amar S et al. Periodontal disease and atherosclerosis. — Evidence linking periodontal infection to cardiovascular disease.
Lockhart PB et al. Periodontal disease and atherosclerotic CVD. AHA Scientific Statement. — AHA review of the evidence.