Anniversary of Goerge Green's Dental Drill 1875

The practice of dentisty goes back to ancient times. There is evidence of it as far back as 7000 years ago, Cavities of 3.5 mm depth with concentric groovings indicate use of a drill quite slow, with speeds up to 15 rpm. In 1864 a british dentist invented a clockwork drill called the Erado. It was very loud. Mr Green came up with his drill in 1861 and had it patented in 1875. This invention revolutionized the industry.