title: Implant failures associated with asymptomatic endodontically treated teeth.
abstract: BACKGROUND
  Endosseous root-formed implants occasionally fail to osseointegrate. Causes of failure include infection, overheating of the bone, habitual smoking, systemic disease, transmucosal overloading, excessive surgical trauma and implant placement adjacent to teeth demonstrating periapical pathology.
  
  
  METHODS
  In this article, the authors present another possible cause of implant failure. The cases of four patients who received endosseous root-formed implants are discussed. Each patient demonstrated signs of infection after initial implant placement. The common factor in each failing implant was its placement adjacent to an asymptomatic endodontically treated tooth with no clinical or radiographic evidence of pathology.
  
  
  CONCLUSIONS
  These patients demonstrate the importance of evaluating and possibly retreating or extracting adjacent endodontically treated teeth before placing implants.
authors.affiliation: Adult Dental Department, Bellevue Hospital Medical Center, New York City, USA.
authors.forename: D L
authors.initials: DL
authors.lastname: Brisman
authors.forename: A S
authors.initials: AS
authors.lastname: Brisman
authors.forename: M S
authors.initials: MS
authors.lastname: Moses
mesh_terms: D000368:Aged; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D019232:Dental Restoration Failure; D006801:Humans; D008297:Male; D008334:Mandible; D008875:Middle Aged; D010485:Periapical Periodontitis / Q000150:complications* / Q000209:etiology*; D019553:Tooth, Nonvital / Q000150:complications*
chemical_list: D015921:Dental Implants