Brush your teeth with a twig?  Or a brush made of hog bristles?  The history of dental hygiene is fascinating and often gruesome.  In fact, even as late as the 1920s, many Americans only brushed their teeth occasionally, if at all.  One reason is that those early toothbrushes could tear up your mouth.

Interested in learning more about the history of toothbrushing?  Check out this recent article from the New York Times Magazine, where Dr. Ben Swanson, former president of the American Academy of the History of Dentistry, shares some surprising facts: