title: [Cochlear implantation in patients with cochlear ossification].
abstract: OBJECTIVE
  To investigate cochlear implantation surgical techniques and postoperative results in patients with cochlear ossification.
  
  
  METHODS
  Twenty-nine cochlear ossification patients with cochlear implantation in our department were retrospectively studied during 1997-2011. Preoperative imaging and electrophysiological assessment were done to classify the cochlear ossification of all the patients. Categories of auditory performance and speech intelligibility rating were detected to assess the outcome of cochlear implant postoperatively.
  
  
  RESULTS
  Among 29 cases with cochlear ossification, 19 cases were grade II, 4 cases were grade I, 4 cases were grade III, and 2 cases were apical turn ossification. Among 23 patients with cochlear ossification grade I and II, 17 cases were totally cochlear array insertion, and 6 cases were partial cochlear array insertion. Patients with cochlear ossification grade III were all partial cochlear array insertion. Most patients achieved good hearing and language ability after cochlear implantation.
  
  
  CONCLUSIONS
  Cochlear implantation can be successfully performed on the basis of systematic preoperative assessment and some patients can achieve good postoperative results in patients with cochlear ossification. Intraoperative electrical stimulation of the auditory evoked response provides a good method to assess the residual spiral nerve function.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lu
authors.forename: Keli
authors.initials: K
authors.lastname: Cao
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000473:pathology; D019929:Cochlear Implantation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006319:Hearing Loss, Sensorineural / Q000209:etiology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000150:complications*; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult