Flossing your teeth may protect against cognitive decline, research shows By Lauren Kent, CNN enablePagination: false endIndex: (CNN) — Flossing your teeth isn't just important for keeping your dentist happy -- it may also protect against cognitive decline. Good oral health habits like brushing and flossing may prevent cognitive impairment and dementia, according to a new analysis led by researchers at NYU Rory Meyers College of Nursing. "Given the staggering number of people diagnosed with Alzheimer's disease and dementia each year, and the opportunity to improve oral health across the life span, it's important to gain a deeper understanding of the connection between poor oral health and cognitive decline," said Bei Wu, a professor in global health at NYU Rory Meyers College of Nursing and the senior study author, in a statement.