Can flossing prevent the development ofdementia?

Studies suggest there exists a link between oral health and dementia.

Causes of gum disease

The mouth houses hundreds of species of bacteria, and this bacteria regularly builds up in plaque, a slimy film that forms along your gums. Neglecting to remove plaque on a daily basis can cause gum disease, the infection of the oral tissues holding teeth in place. This results in symptoms such as bleeding gums and loose or missing teeth. Through these mouth infections, bacteria can find their way into the bloodstream and reach the brain. There is now increasing evidence that poor oral hygiene may be related to the onset of dementia.

Evidence for link between oral health and dementia

One study conducted in 2020 used data from the National Health and Nutritional Examination Survey and linked them with data from the National Death Index and Medicare, tracking over 6,000 participants for up to 26 years. The researchers found that older adults showing signs of 3 gum disease or mouth infections at the start of the study were more likely to develop Alzheimer’s as the study progressed. Specifically, there was a positive association between bacterium P. gingivalis and Alzheimer’s diagnoses and deaths in adults over the age of 65.

Another study compared over 4,000 participants diagnosed with cognitive impairment or dementia with medical examinations or self-reported records of teeth loss. The study found that older adults with missing teeth were at a higher risk for cognitive impairment and dementia, and that with each lost tooth, this risk would increase.

Importance of maintaining good oral hygiene

Though compelling, it is important to note that these studies show correlation between oral hygiene and dementia or cognitive decline, not causation. More research is needed to definitively state that this link exists and the mechanisms behind it. For now, it is still important to continue to remove plaque buildup on your teeth to prevent gum disease and potential tooth loss. You can do this by brushing your teeth thoroughly with fluoride toothpaste twice daily and flossing between the teeth once a day. If you have access to dental care, make sure to visit your provider regularly for checkups and cleaning.