Dentists frequently require impressions of the teeth for dental methods like inserting crowns. Moulds are smaller frames filled with liquid that hardens with time, forming the ideal contour of your teeth. Ancient Greek and Roman dentists extracted teeth with guide pliers. In 1840, Sir John Tomes and his Pal Evrard https://rubyhannah372.godaddysites.com/d%E1%BB%A5ng-c%E1%BB%A5-nha-khoa