title: Unilateral cross bite treated by corticotomy-assisted expansion: two case reports.
abstract: BACKGROUND
  True unilateral posterior crossbite in adults is a challenging malocclusion to treat. Conventional expansion methods are expected to have some shortcomings. The aim of this paper is to introduce a new technique for treating unilateral posterior crossbite in adults, namely, corticotomy-assisted expansion (CAE) applied on two adult patients: one with a true unilateral crossbite and the other with an asymmetrical bilateral crossbite, both treated via modified corticotomy techniques and fixed orthodontic appliances.
  
  
  METHODS
  Two cases with asymmetric maxillary constriction were treated using CAE.
  
  
  RESULTS
  In both cases, effective asymmetrical expansion was achieved using CAE, and functional occlusion was established as well.
  
  
  CONCLUSIONS
  Unilateral CAE presents an effective and reliable technique to treat true unilateral crossbite.
authors.affiliation: Preventive Dental Sciences Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia. alihabib169@hotmail.com
authors.forename: Ali H
authors.initials: AH
authors.lastname: Hassan
authors.forename: Ali T
authors.initials: AT
authors.lastname: AlGhamdi
authors.forename: Ahmad A
authors.initials: AA
authors.lastname: Al-Fraidi
authors.forename: Aziza
authors.initials: A
authors.lastname: Al-Hubail
authors.forename: Manar K
authors.initials: MK
authors.lastname: Hajrassy
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D009967:Orthodontic Appliances; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D016896:Treatment Outcome