title: Bony ankylosis of hydroxyapatite prostheses in the middle ear.
abstract: BACKGROUND
  Ossiculoplasty is a commonly performed middle ear procedure. Ossicular chain reconstruction (OCR) prostheses should be made of a biocompatible material; one such common material is hydroxyapatite (HA).
  
  
  METHODS
  2 patients were identified who had HA OCR prostheses which had fused to the middle ear bony structures. One HA OCR had fused to the fallopian canal in the tympanic segment and represented a management dilemma. The other fused to the scutum.
  
  
  CONCLUSIONS
  Bony ankylosis of a HA containing OCR prosthesis should be considered in the differential diagnosis of a failed ossiculoplasty. Depending on the location of the fusion, special measures may be needed to free the prosthesis from the underlying middle ear structures.
authors.affiliation: Georgia Regents University Department of Otolaryngology, Augusta, GA, USA; University of Miami Department of Otolaryngology, Miami, FL, USA.
authors.forename: Opeoluwa
authors.initials: O
authors.lastname: Fawole
authors.affiliation: Georgia Regents University Department of Otolaryngology, Augusta, GA, USA. Electronic address: smowry@gru.edu.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Mowry
mesh_terms: D000844:Ankylosis / Q000175:diagnosis / Q000209:etiology*; D002648:Child; D018424:Cholesteatoma, Middle Ear / Q000175:diagnosis / Q000601:surgery*; D017886:Durapatite; D004429:Ear Ossicles / Q000473:pathology* / Q000601:surgery; D004432:Ear, Middle; D006801:Humans; D008297:Male; D009998:Ossicular Prosthesis / Q000009:adverse effects*; D011475:Prosthesis Failure; D016896:Treatment Outcome
chemical_list: D017886:Durapatite