title: Implant compression necrosis: current understanding and case report.
abstract: BACKGROUND
  Implants fail for a variety of reasons; it can be difficult to determine the exact cause of failure, especially if there are multiple contributing factors. Overcompression of the adjacent bone during implant placement is a potential contributing factor to implant failure that is not well documented in the literature.
  
  
  METHODS
  This case report reviews the concept of bone loss induced by overcompression and presents a case of implant failure with overcompression as a potential etiology. Histology, radiographs, and clinical data are presented that document the failure of four implants placed in the posterior mandible of a 48-year-old female patient.
  
  
  RESULTS
  After uneventful implant placement, one implant exfoliated 3 weeks postoperatively. The other three implants were removed because of severe bone loss up to 2 months later. Histology of the area revealed non-viable bony sequestra with bacterial colonization.
  
  
  CONCLUSIONS
  This case highlights unusual implant failures that likely occurred as a result of overcompression of the bone during placement. Areas involving dense bone seem to be at increased risk for compression necrosis.
authors.affiliation: Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
authors.forename: Jill D
authors.initials: JD
authors.lastname: Bashutski
authors.forename: Nisha J
authors.initials: NJ
authors.lastname: D'Silva
authors.forename: Hom-Lay
authors.initials: HL
authors.lastname: Wang