Brushing your teeth twice a day can play a significant role in protecting against dementia, particularly by reducing the risk factors linked to cognitive decline. Good oral hygiene helps prevent gum disease, which has been increasingly associated with higher chances of developing dementia, including Alzheimer’s disease. This connection is thought to arise because poor oral health can lead to chronic inflammation and the spread of harmful bacteria, both of which may affect brain health over time.
The mouth is a gateway to the body, and when oral hygiene is neglected, bacteria accumulate and cause periodontal disease—a chronic infection of the gums. This infection triggers systemic inflammation, releasing inflammatory molecules into the bloodstream that can reach the brain. Chronic inflammation is a known contributor to neurodegenerative diseases like dementia. Moreover, some oral bacteria have been found in the brains of people with Alzheimer’s, suggesting that these microbes might directly influence brain pathology.
Brushing twice daily with fluoride toothpaste helps remove plaque—the sticky film of bacteria on teeth—and reduces gum inflammation. Along with flossing or interdental cleaning, this routine limits the bacterial load in the mouth, lowering the risk of periodontal disease. Regular professional dental cleanings further help by removing tartar that brushing alone cannot eliminate. Together, these practices maintain healthier gums and teeth, reducing systemic inflammation and potentially lowering dementia risk.
Maintaining oral health is especially important in midlife and later years, as this is when the risk of cognitive decline increases. Integrating oral health checks into routine medical care can help identify early signs of gum disease or tooth loss, which are markers linked to dementia risk. For people already living with dementia, simplified oral care routines—such as using electric toothbrushes and caregiver assistance—are crucial to prevent oral infections that can worsen overall health.
Beyond brushing, lifestyle factors like quitting smoking, eating a balanced diet rich in anti-inflammatory foods, and managing stress also support oral and brain health. Preventing gum disease is a practical, low-cost strategy that may have high benefits for cognitive function.
In summary, brushing teeth twice a day is more than just a cosmetic habit; it is a foundational practice that helps control oral bacteria and inflammation, both of which are implicated in the development and progression of dementia. While research continues to explore the exact mechanisms and strength of this link, maintaining excellent oral hygiene remains a wise and accessible step toward protecting brain health over a lifetime.
