It’s August Third, and one of the fathers of modern dentistry was born on this day in 1836 in Scott County Illinois. Greene Vardiman Black, also known as G.V. Black, began his dental career in Jacksonville after the Civil War, and later became dean of the dental school at Northwestern. Black wrote books on dental science and invented a foot-driven dental drill. His classifications for five types of cavities are still in use today, although a sixth category was added later.