1. Accidental swallowing of orthodontic expansion appliance key
André da Costa Monini, Luiz Guilherme Martins Maia, Helder Baldi Jacob, Luiz Gonzaga Gandini 
American Journal of Orthodontics and Dentofacial Orthopedics 
Volume 140, Issue 2, Pages (August 2011)
DOI: /j.ajodo
Copyright © 2011 American Association of Orthodontists Terms and Conditions

2. Fig 1 Radiograph showing the swallowed object in the stomach.
American Journal of Orthodontics and Dentofacial Orthopedics  , DOI: ( /j.ajodo )
Copyright © 2011 American Association of Orthodontists Terms and Conditions

3. Fig 2
Two days later, the swallowed object had moved into the sigmoid colon.
American Journal of Orthodontics and Dentofacial Orthopedics  , DOI: ( /j.ajodo )
Copyright © 2011 American Association of Orthodontists Terms and Conditions

4. Fig 3
Safety model of a rapid maxillary expansion key with a plastic spatula.
American Journal of Orthodontics and Dentofacial Orthopedics  , DOI: ( /j.ajodo )
Copyright © 2011 American Association of Orthodontists Terms and Conditions