Most people recognize high blood pressure, smoking, diabetes, and high cholesterol as major stroke risk factors. However, growing research suggests another potential contributor may be hiding in plain sight, gum disease.

A study published in the Journal of Dental Research investigated whether periodontitis and recent invasive dental procedures might be associated with cryptogenic ischemic stroke (CIS) in younger adults. While the research does not prove that gum disease causes stroke, it adds to an expanding body of evidence linking chronic oral inflammation to cardiovascular and neurological health.

For patients in Henderson, Las Vegas, and throughout Southern Nevada, this research reinforces an important message: maintaining healthy gums may benefit far more than your smile.

What Is an Ischemic Stroke?

An ischemic stroke occurs when blood flow to part of the brain is blocked, depriving brain tissue of oxygen.

It is the most common type of stroke, accounting for approximately 87% of all strokes.

Symptoms may include:

• Sudden weakness or numbness
• Facial drooping
• Difficulty speaking
• Vision changes
• Loss of balance
• Severe dizziness
• Confusion

A stroke is a medical emergency requiring immediate treatment.

What Is Cryptogenic Stroke?

A cryptogenic stroke is a stroke with no clearly identifiable cause, even after extensive medical evaluation.

These strokes are particularly concerning because they frequently occur in younger adults, making prevention especially important.

Researchers continue searching for previously overlooked risk factors—including chronic inflammatory diseases such as periodontitis.

Dr. Perrone’s Perspective

“Oral health is increasingly recognized as part of whole-body health. While brushing and flossing alone won’t prevent a stroke, treating periodontal disease may help reduce chronic inflammation that has been associated with numerous systemic conditions.”

— Marielaina Perrone, DDS

What Is Periodontitis?

Periodontitis is an advanced form of gum disease caused by bacterial infection and chronic inflammation.

Without treatment, it can lead to:

• Bone loss
• Gum recession
• Loose teeth
• Tooth loss

Early warning signs include:

• Bleeding gums
• Persistent bad breath
• Red or swollen gums
• Gum recession
• Loose teeth
• Pain while chewing

Unfortunately, periodontitis often progresses with very little discomfort.

Why Researchers Investigated the Link

Scientists have long recognized that chronic inflammation contributes to cardiovascular disease.

Because periodontitis creates persistent inflammation throughout the body, researchers questioned whether it might also influence stroke risk.

The study was conducted through the SECRETO (Searching for Explanations for Cryptogenic Stroke in the Young) research program.

The SECRETO Study

Researchers evaluated:

• 146 adults who experienced a first cryptogenic ischemic stroke
• 146 age- and sex-matched control participants

Each participant received:

• Comprehensive periodontal examination
• Dental radiographs
• Blood testing
• Evaluation for inflammatory bacterial markers

Researchers also measured serum levels of:

• Lipopolysaccharide (LPS)
• Lipoteichoic acid (LTA)

These bacterial toxins may help explain how oral bacteria influence systemic inflammation.

What Did the Study Find?

Several important findings emerged.

Periodontitis Was More Common in Stroke Patients

Researchers found that individuals experiencing cryptogenic ischemic stroke had significantly higher rates of periodontitis than healthy controls.

Even more importantly, the severity of periodontal disease appeared to correlate with stroke risk.

The worse the periodontal disease, the greater the association.

Recent Invasive Dental Procedures

Researchers also observed that invasive dental procedures performed within three months before stroke onset were associated with increased stroke risk in certain patients.

This finding was strongest among individuals with patent foramen ovale (PFO), a common congenital opening between the heart’s upper chambers.

It’s important to understand that this finding does not mean dental treatment causes stroke.

Rather, the researchers suggest that specific high-risk patients may require individualized medical consideration.

Bacterial Toxins May Play a Role

Although overall blood levels of LPS and LTA were not significantly different between groups, researchers observed that the LPS/LTA ratio increased with worsening periodontal disease.

This supports the theory that oral bacteria and inflammatory toxins may contribute to systemic inflammation.

Additional research is ongoing.

Why Might Gum Disease Affect Stroke Risk?

Scientists believe several mechanisms may be involved.

Chronic Inflammation

Periodontal disease produces ongoing inflammation that can affect blood vessels throughout the body.

Oral Bacteria Entering the Bloodstream

Everyday activities such as:

• Brushing
• Flossing
• Chewing

may allow oral bacteria to temporarily enter the bloodstream when gums are inflamed.

Researchers continue studying whether these bacteria contribute to vascular disease.

Shared Risk Factors

Stroke and periodontal disease share many common risk factors, including:

• Smoking
• Diabetes
• High blood pressure
• Aging
• Obesity
• Poor nutrition

These overlapping conditions likely contribute to the observed relationship.

Does This Mean Gum Disease Causes Stroke?

No.

This study found an association, not proof of direct causation.

Researchers emphasize that stroke is a complex condition influenced by multiple factors.

However, the growing body of evidence suggests that maintaining healthy gums may be one component of reducing overall cardiovascular risk.

Protecting Your Oral and Overall Health

Whether or not gum disease directly contributes to stroke, preventing periodontal disease benefits your overall health.

Healthy habits include:

• Brushing twice daily
• Daily flossing
• Regular professional cleanings
• Periodontal evaluations
• Managing diabetes
• Controlling blood pressure
• Avoiding tobacco products
• Eating a balanced diet
• Exercising regularly

Good oral health should be viewed as part of comprehensive preventive healthcare.

Frequently Asked Questions

Can gum disease cause a stroke?

Current research shows an association but has not established a direct cause-and-effect relationship.

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Why would oral health affect the brain?

Researchers believe chronic inflammation and oral bacteria entering the bloodstream may contribute to vascular disease.

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Should stroke patients receive periodontal treatment?

Maintaining excellent oral health is beneficial for everyone, including individuals with cardiovascular disease. Treatment recommendations should always be individualized.

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Is it safe to have dental treatment after a stroke?

Yes, in most cases. Your dentist and physician can work together to determine the safest treatment plan based on your medical history.

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Can professional cleanings reduce inflammation?

Professional periodontal care helps reduce bacterial accumulation and chronic gum inflammation, improving oral health.

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Healthy Gums Support Whole-Body Wellness

The connection between oral health and systemic disease continues to become clearer as research advances.

The SECRETO study adds important evidence suggesting that periodontitis may be associated with cryptogenic ischemic stroke in younger adults. While additional research is still needed, maintaining healthy gums remains one of the simplest steps you can take to support both your oral and overall health.

If you have bleeding gums, persistent bad breath, or signs of periodontal disease, schedule an evaluation with Marielaina Perrone, DDS. Early diagnosis and treatment may protect not only your smile but also your long-term health.

About the Author

Marielaina Perrone, DDS is an award-winning cosmetic, restorative, and implant dentist serving Henderson, Green Valley, Anthem, Seven Hills, Inspirada, Las Vegas, and surrounding Southern Nevada communities. A graduate of Stony Brook University School of Dental Medicine, she has practiced dentistry since 1999 and has extensive experience in preventive dentistry, periodontal therapy, dental implants, and oral-systemic health. She is passionate about helping patients understand the important connection between healthy gums and overall wellness.

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Medically Reviewed By

Marielaina Perrone, DDS
Doctor of Dental Surgery
Dentist – Henderson, Nevada

Dr. Perrone regularly completes advanced continuing education in periodontal disease, oral-systemic health, implant dentistry, preventive dentistry, and evidence-based patient care. All educational content is clinically reviewed to reflect current scientific research and accepted standards of care.

Updated: July 2026