Imagine beginning your morning by rubbing powdered glass and burned hare’s head onto your teeth, then thoroughly rinsing with child’s urine. At various points in history, this might have counted as a meticulous dental routine. People have tried to keep their teeth clean for thousands of years, but the familiar combination of a nylon toothbrush and minty paste is relatively recent. In fact, some of the dental cleaning tips earlier medical authorities recommended now sound misguided, disgusting, or downright dangerous. If you weren’t already thankful for modern dentistry, the methods below might change your mind. ...Read More