title: Correction of a severely rotated maxillary central incisor with the Whip device.
abstract: OBJECTIVE
  The aim of this case report was to introduce an appliance that can be used for correcting severe rotation of anterior teeth in pre-adolescent children.
  This is a case report of an 11-year-old Iranian boy with a mixed dentition Class I malocclusion defined by a severe rotation of upper left central incisor and a mesiodens between the centrals. The supernumerary tooth was first extracted, and then a Whip device including removable appliance, a cantilever spring and bonded tube on rotated tooth was inserted into his mouth. After 8 months, the upper left central incisor was orthodontically brought into proper alignment. Circumferential supracrestal fibrotomy was done next to overcorrection of the tooth and one week after surgery, the device was removed and the retention was started.
  
  
  CONCLUSIONS
  The whip device, a removable appliance can be very effective for correcting severe rotation of anterior teeth.
authors.affiliation: Department of Orthodontics, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Arezoo
authors.initials: A
authors.lastname: Jahanbin
authors.forename: Bahareh
authors.initials: B
authors.lastname: Baghaii
authors.forename: Iman
authors.initials: I
authors.lastname: Parisay
keywords: Mesiodens; Severe rotation; Whip device