--- title: "Research Suggests That Bad Dental Health May Increase Risk of Dementia" description: "A growing body of research shows that poor dental health is linked with cognitive decline and Alzheimer's disease." date: "2023-09-24" modified: "2023-09-24" authors: - name: "Frank Landymore" job_title: "Contributing Writer" link: "https://futurism.com/authors/flandymore" url: "https://futurism.com/neoscope/research-dental-health-dementia" categories: - "Brain" - "Health & Medicine" - "Neuroscience and Brain" tags: - "alzheimer's disease" - "dementia" - "dental health" - "oral health" --- # Research Suggests That Bad Dental Health May Increase Risk of Dementia ![A growing body of research shows that poor dental health is linked with cognitive decline and Alzheimer's disease.]() *Close up of dentist holding angled mirror and hook while examining patient. Young woman is with mouth open getting dental checkup in hospital. \Image: Luis Alvarez via Getty Images\* Keep your gums and chompers spick and span, folks, because there's a growing body of evidence that shows that your dental health may affect your risk of dementia, [*The Washington Post* reports](). "People should really be aware that oral health is really important," Anita Visser, a professor of geriatric dentistry at the University of Groningen in the Netherlands, told the newspaper. For example, one [2017 study]() cited by *WaPo* that involved nearly 28,000 people in Taiwan found that having periodontal disease, or gum disease, for ten years or more increased the risk for contracting Alzheimer's disease, the most common form of dementia, by a factor of 1.7. A [2022 metaanalysis]() of 47 studies on the matter also found that poor periodontal health and tooth loss was associated with cognitive decline and dementia. As to why, [further]() [research]() has drawn more tangible links between certain mouth bacteria and Alzheimer's. In particular, a [2019 study]() discovered that the *P. gingivalis* bacteria, which causes gum disease, was popping up in the autopsied brains of Alzheimer's patients. In testing in mice, that study found that the mouth bacteria's intrusion into the brain seems to cause amyloid β to appear, a peptide that has long been considered central to Alzheimer's, as well as worsening inflammation in the brain, also thought to be linked to the disease. Like Alzheimer's itself, though, the exact medical details of the apparent link remain hazy. As *WaPo* notes, dementia patients may find it harder to keep up with dental care, and so poor oral hygiene may be a symptom and not a cause. The relationship could even be bidirectional, or both a symptom *and* a cause. And so, the consensus is nuanced. Another [2022 analysis]() concurs that the evidence so far suggests a bidirectional relationship, but notes that a causal link between gum disease and Alzheimer's still hasn't been firmly established. "It's really complicated," Visser told the *WaPo*. "And this is why we cannot say, 'Oh, if you have periodontitis, you will get Alzheimer's disease.' But we know now that if you have severe periodontitis, the chance of getting Alzheimer's disease is bigger." Without a greater body of research, there’s no definitive conclusions to be made yet. But at the end of the day, there’s also no excuse to not floss and brush your teeth. Your brain may well thank you for it in addition to your teeth and gums — as well as those around you. **More on dental health:** *[Celebrities Are Permanently Damaging Their Teeth for a “Perfect Smile,” But It’s Coming Back to Haunt Them Later]()* ## Author At Futurism, my work has often centered on bringing a sense of clarity and insight to complex topics ranging from the regulation of emerging technologies to the esoteric ideologies of Silicon Valley executives, while striving not to lose the poetic sense of awe inspired by often-obscure fields like astrophysics and quantum computing. I broke the story of CNET using AI to produce articles that turned out to be riddled with factual errors and plagiarism — a dam-breaking inflection point, as I've reported, that's inspired copycats and endless discourse while beguiling stakeholders ranging from tech giants to purveyors of spam around the web. My work at Futurism has been cited by publications including CBS News, the Los Angeles Times, Vice, Gizmodo, Engadget, the Verge, and Vanity Fair. I grew up in locales ranging from India to China, and now live in the exotic suburbs of Virginia. In my free time, I'm an avid reader of weird sci-fi literature, an aficionado of East Asian cinema, and, regrettably, a relapsed gamer. Allegedly, I’m working on a debut novel, currently untitled. ### Author social links [Bluesky]()