title: The modified two-by-one fixed orthodontic appliance for bodily movement of canine: a case report.
abstract: BACKGROUND
  Orthodontic management of an ectopically erupted canine requires substantial amount of bodily movement which is difficult to perform and often results in root resorption.
  
  
  METHODS
  A 9 year old girl presented with Class I malocclusion with crowding and ectopically positioned upper left canine (23). Treatment involved extraction of all first premolars. The alignment of the upper left canine was achieved by the modified 2 by 1 appliance.
  
  
  CONCLUSIONS
  The design of this modified 2 by 1 appliance allows individualized bodily tooth movement of canine, it provides light and continuous force for physiological orthodontic movement with minimal root resorption.
authors: Faculty of Dentistry, University of Hong Kong, 2/F, 34 Hospital Road, Sai Ying Pun, Hong Kong SAR, PR China. drvickytsui@gmail.com
authors: Vicky W K
authors: VW
authors: Tsui
authors: Hessa A
authors: HA
authors: Alkhal
authors: Huie M
authors: HM
authors: Hou
authors: Ricky W K
authors: RW
authors: Wong
authors: A Bakr M
authors: AB
authors: Rabie