Brushing teeth not only prevents cavities, it cuts stroke risk too

Sumit Jha

Oct 29, 2025

Health

Health

People brush their teeth for better oral hygiene, prevent cavities, and to keep their breath fresh. Few realise they might also be protecting themselves from a stroke.

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A US study said people suffering from both gum disease and tooth decay face nearly double the risk of ischemic stroke compared to those who maintain healthy teeth and gums.

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The revelation emerged from tracking nearly 6,000 Americans for over two decades, revealing patterns that connect the mouth to the brain in ways previously underestimated.

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Researchers tracked hospital and medical records through 2019, watching for ischemic strokes, heart attacks, and fatal coronary heart disease.

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Periodontal disease exposes the body to chronic Gram-negative bacteria, driving systemic inflammation higher. 

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Integrating dental care into routine medical risk assessment and promoting preventive oral hygiene practices may offer a novel strategy to reduce vascular risk at the population level.