When did forensic dentistry begin?

Not recently by any means. In 66 A.D., Nero's mother, Agrippina, told soldiers to kill Lolia Paulina and bring back her head as proof. Agrippina could not fully identify the head, and therefore identified her by her teeth discoloration. During the US Revolutionary War, a young dentist by the name of Paul Revere; who was a young dentist, helped identify corpses by their bridge work.