title: Inverted impaction of a mandibular premolar associated with a dentigerous cyst: report of a case.
abstract: Inverted impaction of mandibular premolars is reported to be rare; its prevalence has not been quantified. Here we report a case in which a 12-year-old female presented with an inverted impacted manibular premolar associated with a dentigerous cyst. The likely aetiology and management of this condition is discussed.
  
  
  CONCLUSIONS
  This case highlights the need for clinicians to be aware of the rarer causes of apparent absence of teeth from the arch and the importance of taking radiographs prior to treatment planning.
authors.affiliation: Cardiff University, School of Dentistry, Heath Park, Cardiff, UK.
authors.forename: Shannu Kohli
authors.initials: SK
authors.lastname: Bhatia
authors.forename: Mechelle
authors.initials: M
authors.lastname: Collard
authors.forename: Danijela
authors.initials: D
authors.lastname: Divcic
authors.forename: Lindsay
authors.initials: L
authors.lastname: Hunter
mesh_terms: D001641:Bicuspid / Q000473:pathology / Q000503:physiopathology*; D002648:Child; D003803:Dentigerous Cyst / Q000150:complications* / Q000601:surgery; D005260:Female; D006801:Humans; D008334:Mandible; D014081:Tooth Extraction; D014095:Tooth, Impacted / Q000209:etiology* / Q000601:surgery