A new study published today in *Neurology Open Access* reveals a critically important link between common dental issues and increased risk of stroke and heart disease, adding to a growing body of research on the oral-systemic connection. Researchers followed nearly 6,000 participants over several years, finding those with both gum disease and tooth decay faced an 86% higher stroke risk. The findings underscore the importance of preventative dental care and could have implications for stroke prevention strategies [[1]].
Published December 8, 2025 – 1:00 PM GMT+1
Common dental problems, such as gum disease and tooth decay, may significantly increase the risk of both stroke and heart problems, according to a new study. Researchers found that individuals with both gum disease and tooth decay had an 86% higher risk of stroke compared to those with healthy mouths, and a 36% increased risk of heart issues. This research highlights the interconnectedness of oral health and overall cardiovascular and neurological well-being.
The study, conducted by a team from the American Academy of Neurology and published in the journal Neurology Open Access, followed 5,986 participants with an average age of 63 who had not previously experienced a stroke. Participants were categorized into three groups based on their oral health: healthy mouth, gum disease only, and gum disease with tooth decay.
Results showed that 4% of individuals with healthy mouths experienced a stroke, compared to 7% of those with gum disease alone, and 10% of those with both gum disease and tooth decay.
“The findings suggest that improving oral health could be an important part of stroke prevention efforts,” said researcher Souvik Sen, from the University of South Carolina. “Taking care of your teeth and gums isn’t just about keeping your smile – it may also help protect your brain.”
Regular dental visits appear to have a substantial impact, reducing the likelihood of having both gum disease and tooth decay by 81%, and decreasing the risk of gum disease alone by 29%, the research indicated.
Tooth decay is defined as the breakdown of tooth enamel caused by bacteria, often due to sugary or starchy foods, or poor hygiene. Gum disease, meanwhile, arises from inflammation or infection in the gums and the bone that supports the teeth, and can lead to tooth loss if left untreated.
Ischemic stroke, caused by a blockage or clot that interrupts blood flow to the brain, is the most common type of stroke.
The study’s results demonstrate that neglecting oral health can lead to significant neurological and cardiac complications over time. These findings reinforce the importance of preventative dental care as a component of broader health maintenance.
