1. AAO Special bulletins on extraoral appliance care;Am J Orthod,1975
2. Why do we have orthodontic failures?;Baker;Am J Orthod Oral Surg,1939
3. Iatrogenic problems associated with the clinical practice of orthodontics;Behrents,1996
4. Penetrating eye injury from orthodontic headgear—a case report;Booth-Mason;Eur J Orthod,1988
5. Why do we have orthodontic failures?;Burrill;Am J Orthod Oral Surg,1939