Experts urge adding oral health as a significant dementia risk factor
NEW YORK: A team from New York University’s Rory Meyers College of Nursing is calling for oral health to be recognized as a major modifiable risk factor for dementia, citing a growing body of evidence linking poor dental hygiene to cognitive decline.
Last year’s influential Lancet report added high cholesterol and vision loss to dementia risk lists, but Dean’s Professor Bei Wu, alongside collaborator Dr. Xiang Qi, argues that oral health was overlooked. In a Lancet letter published on February 20, Wu emphasized that only two studies were cited when hundreds support the link between oral disease and dementia.
Oral health may triple dementia risk
According to Dr. Xiang Qi, their NIH-funded research shows poor oral health nearly triples the risk of dementia, outperforming diabetes and hypertension as predictors. Their work includes:
- A 2021 JAMDA study linking tooth loss to elevated risk of cognitive impairment
- A 2023 study demonstrating how tooth loss plus diabetes accelerates cognitive decline
- A 2024 report showing gum treatment reduced dementia risk by 38% in older adults
- A 2023 Aging Medicine study suggesting dentures may protect cognition
Why oral health matters in dementia prevention
The team highlights that many oral issues are preventable through regular dental visits and improved hygiene. Positioning these measures as modifiable risk factors could influence public health policies, dental guidelines, and empower communities.
“Researchers shouldn’t work in silos. We need integrated approaches to health and well‑being,” said Wu, recalling her early 2007 research on dental care and cognitive health.
Dementia’s global rise
As the WHO projects dementia cases will triple to 152 million by 2050, recognizing oral hygiene’s role could have profound public health impacts. National projections, such as Canada’s rise to 1.7 million cases and U.S. estimates doubling by 2060, underscore the urgency.
Wu concludes that fully acknowledging oral health’s link to dementia would help dentists play a more proactive role in cognitive decline prevention, shape health policy, and support early intervention — benefiting millions worldwide.
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