In the early 1800s, a pioneering dentist, Levi Spear Parmly, urged patients to clean between their teeth with silk thread — a revolutionary technique that could protect the gum line and prevent tooth decay. But “people just didn’t get it,” says Dr. Scott Swank, curator of the National Museum of Dentistry. In an era during which rotting molars were the norm, he says, “people expected their teeth to fall out.
In the 1870s, Asahel Shurtleff helped to civilize floss when he patented the first dispenser: a bobbin of thread with a U-shaped prong sticking out of its side. The prong worked like a tiny metal hand, guiding floss between the teeth. His invention anticipated the portable floss holders you can now buy in drugstores.
Designers have since given us bubble-gum-flavored floss, Gore-Tex strands and tooth-shaped dispensers — all in an attempt to make flossing seem fun or at least not too difficult. Recent studies, meanwhile, have revealed that flossing might be one of the simplest ways to ward off tooth decay.