title: Five-year hearing results with the shape memory nitinol stapes prosthesis.
abstract: OBJECTIVE
  To evaluate the long-term (5-year) results of the shape-memory nitinol stapes piston in the surgical treatment of otosclerosis.
  
  
  METHODS
  Retrospective case review in a tertiary referral center.
  
  
  METHODS
  The patients were adults with clinically proven otosclerosis undergoing stapedotomy. Stapedotomy and ossicular chain reconstruction using a shape-memory nitinol stapes piston were performed. The main outcome measure was masked air and bone conduction audiometry.
  
  
  RESULTS
  Forty-eight out of a potential 58 ears had complete audiometric data. The mean preoperative air-bone gap was 29.2 dB (standard deviation [SD] 9.4). The postoperative gap at 1 year was 4.6 dB (SD 3.1), and P at 5 years was 7.0 dB (SD 6.2).
  
  
  CONCLUSIONS
  These data suggest that the Smart piston provides a stable long-term hearing result in the surgical treatment of otosclerosis.
authors.affiliation: ENT Department, Royal National Throat, Nose and Ear Hospital, London, United Kingdom. jeremy.lavy@nhs.net
authors.forename: Jeremy
authors.initials: J
authors.lastname: Lavy
authors.forename: Sherif
authors.initials: S
authors.lastname: Khalil
mesh_terms: D000328:Adult; D000497:Alloys; D000704:Analysis of Variance; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009998:Ossicular Prosthesis; D010040:Otosclerosis / Q000175:diagnosis / Q000601:surgery*; D011475:Prosthesis Failure; D012189:Retrospective Studies; D012720:Severity of Illness Index; D013201:Stapes Surgery / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome; D006113:United Kingdom
chemical_list: D000497:Alloys; C013616:nitinol