Early days, major problems, and gradual acceptance of the American Board of Orthodontics.
D002568:Certification / Q000266:history*; D049673:History, 20th Century; D009970:Orthodontics / Q000193:education / Q000266:history*; D012953:Societies, Dental / Q000266:history; D013044:Specialty Boards / Q000266:history*; D014481:United States