Key Takeaways
- People with both cavities and gum disease face 86% higher stroke risk
- Regular dental care reduces risk of combined oral conditions by 81%
- Ischemic stroke risk increases significantly with poor oral health
A groundbreaking study reveals that poor dental health significantly increases stroke risk, with individuals suffering from both cavities and gum inflammation facing an 86% higher chance of experiencing a stroke.
The research published in Neurology journal found that the combination of periodontal disease and dental caries independently associates with increased ischemic stroke risk.
Study Details and Methodology
University of South Carolina researchers analyzed approximately 6,000 middle-aged adults initially free from stroke. Participants underwent dental examinations and were categorized into three groups: healthy oral status, gum disease alone, or both periodontal disease and dental cavities.

Striking Risk Percentages Revealed
Stroke frequency showed dramatic differences across groups: only 4% for individuals with sound oral health, 7% for those with gum disease alone, and 10% when dental decay accompanied gum disease.
Statistical analysis confirmed an 86% amplified stroke risk with combined dental conditions, while gum disease alone correlated with 44% increased risk.
Professional Dental Care Makes a Difference
The researchers emphasized that regular dental care dramatically reduces risk. Those receiving professional dental care exhibited an 81% lower chance of developing both gum disease and cavities.
“Co-occurring periodontal disease and dental caries were independently associated with increased risk of ischemic stroke. Regular dental care may reduce this risk by improving oral health.”
Possible Biological Mechanisms
Scientists suspect oral bacteria and their toxins entering the bloodstream may trigger stroke events by causing chronic inflammation throughout the body.
However, researchers caution that unmeasured factors like socioeconomic status, healthcare access, diet, and genetics might also influence outcomes.
The study concludes that both doctors and patients need greater awareness about the serious health ramifications of dental neglect, particularly its connection to stroke risk.



