title: Repairing iatrogenic root perforations.
abstract: BACKGROUND
  Post preparation is an integral part of restoring endodontically treated teeth in indicated cases. Iatrogenic perforation of the root can result from preparing post space and can severely compromise the prognosis of the tooth.
  
  
  METHODS
  Two years after a patient's maxillary lateral incisor was restored with a post-retained composite resin, he went to a dental school emergency clinic with a chief complaint of soft-tissue swelling adjacent to the tooth. The authors took a periapical radiograph that revealed evidence of a circumscribed radiolucent lesion associated with the distal midroot area and a periapical radiolucency. Based on the radiograph, the authors suspected that the canal preparation for the post and the post placement had perforated the root at the base of the post.
  
  
  CONCLUSIONS
  The authors used a combined surgical and orthograde approach with a biocompatible restorative material and a clear, plastic light-transmitting post to repair the iatrogenic perforation.
authors.affiliation: Department of Endodontics, Dental School, University of Maryland at Baltimore 21201, USA.
authors.forename: A
authors.initials: A
authors.lastname: Behnia
authors.forename: H E
authors.initials: HE
authors.lastname: Strassler
authors.forename: R
authors.initials: R
authors.lastname: Campbell
mesh_terms: D000328:Adult; D001047:Apicoectomy; D001672:Biocompatible Materials; D002126:Calcium Hydroxide; D003188:Composite Resins; D005500:Follow-Up Studies; D005899:Glass Ionomer Cements; D006801:Humans; D007049:Iatrogenic Disease; D007180:Incisor / Q000293:injuries*; D008297:Male; D008437:Maxilla; D010485:Periapical Periodontitis / Q000209:etiology; D011176:Post and Core Technique / Q000009:adverse effects; D011379:Prognosis; D012117:Resins, Synthetic; D019233:Retreatment; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000009:adverse effects*; D014092:Tooth Root / Q000293:injuries*
chemical_list: D001672:Biocompatible Materials; D003188:Composite Resins; C074933:Geristore; D005899:Glass Ionomer Cements; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide