title: Diagnosis and management of root resorption by erupting canines using cone-beam computed tomography and fixed palatal appliance: a case report.
abstract: BACKGROUND
  Resorption of the root of the maxillary incisors during ectopic eruption of the maxillary canines is not an uncommon phenomenon, and must be considered in all patients with seriously diverging eruption of the maxillary canines.
  
  
  METHODS
  We report on the diagnosis and treatment of a 10-year-old Chinese boy with severe crowding and risk of root resorptions caused by impacted canines in the upper arch and reverse overjet. With the aid of cone-beam computed tomography, the upper right canine crown of our patient was positioned in close proximity to the right lateral incisor while the left canine crown was hitting the root apex of the left lateral incisor. To avoid any progress of root resorption, use of an upper fixed palatal appliance with torquing spring to move the root of lateral incisors away from the canines, plus extraction of upper primary first molars, was selected as an interceptive treatment.
  
  
  CONCLUSIONS
  Careful planning is crucial to avoid any complication through orthodontic treatment and to reduce the treatment time and cost.
authors.affiliation: Orthodontics, Faculty of Dentistry, the University of Hong Kong, Hong Kong SAR, PR China. fyoung@hkucc.hku.hk.
authors.forename: Bodore K
authors.initials: BK
authors.lastname: Albaker
authors.forename: Ricky Wk
authors.initials: RW
authors.lastname: Wong