Image of Ancient Egypt­ian Den­tistry, via Wiki­me­dia Com­mons When we assume that mod­ern improve­ments are far supe­ri­or to the prac­tices of the ancients, we might do well to actu­al­ly learn how peo­ple in the dis­tant past lived before indulging in “chrono­log­i­cal snob­bery.” Take, for exam­ple, the area of den­tal hygiene. We might imag­ine the ancient Greeks or Egyp­tians as prone to ram­pant tooth decay, lack­ing the ben­e­fits of pack­aged, brand­ed tooth­paste, silken rib­bons of floss, astrin­gent mouth­wash, and ergonom­ic tooth­brush­es. But in fact, as tooth­paste man­u­fac­tur­er Col­gate points out, “the basic fun­da­men­tals” of tooth­brush design “have not changed since the times of the Egyp­tians and Babylonians—a han­dle to grip, and a bris­tle-like fea­ture with which to clean the teeth.” And not only did ancient peo­ple use tooth­brush­es, but it is believed that “Egyp­tians… start­ed using a paste to clean their teeth around 5000 BC,” even before tooth­brush­es were invent­ed. In 2003, cura­tors at a Vien­nese muse­um dis­cov­ered “the world’s old­est-known for­mu­la for tooth­paste,” writes Irene Zoech in The Tele­graph, “used more than 1,500 years before …