title: Bone formation in hydroxyapatite orbital implants.
abstract: OBJECTIVE
  We examined the histopathologic features of two hydroxyapatite orbital implants that were removed from two patients.
  
  
  METHODS
  Two surgically removed hydroxyapatite orbital implants were decalcified and processed for routine light microscopic examination.
  
  
  RESULTS
  Both implants demonstrated fibrovascular ingrowth and foci of bone formation.
  
  
  CONCLUSIONS
  Bone may form in hydroxyapatite orbital implants.
mesh_terms: D000328:Adult; D000368:Aged; D001846:Bone Development; D001842:Bone and Bones / Q000473:pathology; D002113:Calcification, Physiologic; D017886:Durapatite; D015353:Eye Enucleation; D005131:Eye Injuries / Q000209:etiology / Q000601:surgery; D005260:Female; D006801:Humans; D009915:Orbit / Q000601:surgery*; D016348:Osseointegration; D019736:Prostheses and Implants; D012086:Reoperation
chemical_list: D017886:Durapatite