title: American Board of Orthodontics to celebrate golden anniversary at AAO Washington meeting.
mesh_terms: D000846:Anniversaries and Special Events; D002568:Certification / Q000266:history*; D004219:District of Columbia; D049673:History, 20th Century; D009970:Orthodontics / Q000266:history*; D012953:Societies, Dental; D013044:Specialty Boards / Q000266:history*; D014481:United States