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Oral hygiene reduces the risk of developing dementia and Alzheimer's later in life

Amanprana mouth oil. My gums are in fantastic condition, and my dentist can't believe his eyes during my six-monthly check-up

Marijke Helwegen, TV personality, The Netherlands

Aug 21 (Reuters) - People who keep their teeth and gums healthy with regular brushing may have a lower risk of developing dementia later in life, according to a U.S. study.

Keep teeth and gums healthy and reduce the risk of dementia and Alzheimer later in life

Researchers at the University of California who followed nearly 5,500 elderly people over an 18-year-period found that those who reported brushing their teeth less than once a day were up to 65 percent more likely to develop dementia than those who brushed daily.

"Not only does the state of your mind predict what kind of oral health habits you practice, it may be that your oral health habits influence whether or not you get dementia," said Annlia Paganini-Hill, who led the study, published in the Journal of the American Geriatrics Society.

Inflammation stoked by gum disease-related bacteria is implicated in a host of conditions including heart disease, stroke and diabetes.

Some studies have also found that people with Alzheimer's disease, the most common form of dementia, have more gum disease-related bacteria in their brains than a person without Alzheimer's, Paganini-Hill said.

It's thought that gum disease bacteria might get into the brain, causing inflammation and brain damage, she said.

Paganini-Hill and her team followed 5,468 residents of a Californian retirement community from 1992 to 2010. Most people in the study were white, well-educated and relatively affluent. When the study began, participants ranged in age from 52 to 105, with an average age of 81.

All were free of dementia at the outset, when they answered questions about their dental health habits, the condition of their teeth and whether they wore dentures.

When the researchers followed up 18 years later, they used interviews, medical records and in some cases death certificates to determine that 1,145 of the original group had been diagnosed with dementia.

Of 78 women who said they brushed their teeth less than once a day in 1992, 21 had dementia by 2010, or about one case per 3.7 women.

In comparison, among those who brushed at least once a day, closer to one in every 4.5 women developed dementia which translates to a 65-percent greater chance of dementia among those who brushed less than daily.

Among the men, the effect was less pronounced with about one in six irregular brushers developing the disease, making them 22 percent more likely to have dementia than those who brushed daily. Statistically, however, the effect was so small it could have been due to chance, the researchers said. Paganini-Hill could only speculate on the reasons for the different outcomes among men and women. Perhaps women wear their dentures more often than men and visit the dentist more frequently.

"I would be reluctant to draw the conclusion that brushing your teeth would definitely prevent you from getting Alzheimer's disease," she said.

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