title: Gingival health in relation to clinical crown length: a case report.
abstract: BACKGROUND
  Gingival margin position in relation to synthetic crowns and crown length could be etiological factors in gingival health.
  
  
  METHODS
  A 27-year-old male presented with necrotizing ulcerative gingivitis with short clinical crowns suggestive of altered passive eruption. Three years after the initial diagnosis, he presented with crowns on the maxillary incisors. There were short clinical crowns and marked gingival inflammation.
  
  
  CONCLUSIONS
  Placement of the crown margin could be an etiological factor in gingival inflammation. Therefore, should the margin be subgingival, equigingival or supragingival?
authors.affiliation: Department of Experimental Odontology and Orthodontics, School of Oral Health Sciences, University of the Witwatersrand,Johannesburg, 2050 Wits, South Africa. volchans@iafrica.com
authors.forename: Alf
authors.initials: A
authors.lastname: Volchansky
authors.forename: Peter
authors.initials: P
authors.lastname: Cleaton-Jones