title: An analysis of the air-bone gap closure obtained by a crimping and a non-crimping titanium stapes prosthesis in otosclerosis.
abstract: OBJECTIVE
  To evaluate the hearing results of stapes surgery with two different titanium stapes prostheses. A crimping and a non-crimping prosthesis.
  
  
  METHODS
  Retrospective analyses were carried out on the pre- and postoperative hearing results obtained after 126 primary stapedotomies with two different prostheses in patients with otosclerosis. Sixty-three patients had a stapedotomy with a K-piston Titanium (No. 1006107) type and 63 patients received a CliP-piston àWengen Titanium (No. 1006807) type after stapedotomy. The results were compared according to mean audiometrical parameters. A Chi-square Test analysis (a contingency table) was performed with odds ratio to analyze this retrospective case-control study.
  
  
  RESULTS
  The hearing results of both titanium stapes prostheses were comparable. There was no difference in the final hearing results between the two pistons studied. No statistically significant difference between the postoperative air-bone gap closures by the two titanium stapes prostheses studied could be demonstrated.
  
  
  CONCLUSIONS
  Because of the different properties of the two titanium piston studied (CliP-piston àWengen Titanium type, no crimping and K-piston Titanium crimping necessary) a difference in the closure of the air-bone gap could be suspected. This comparative study could not demonstrate a statistical better air-bone gap closure for one of the titanium pistons. Both stapes prostheses showed good results in reconstruction of the hearing loss due to otosclerosis.
authors.affiliation: Department of Otolaryngology, Head and Neck Surgery Division Otology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands. R.A.Tange@ear-surgeon.com
authors.forename: Rinze A
authors.initials: RA
authors.lastname: Tange
authors.forename: Wilko
authors.initials: W
authors.lastname: Grolman
mesh_terms: D000328:Adult; D001299:Audiometry; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D009998:Ossicular Prosthesis; D010040:Otosclerosis / Q000601:surgery*; D011474:Prosthesis Design; D012189:Retrospective Studies; D013199:Stapes; D013201:Stapes Surgery / Q000295:instrumentation*; D014025:Titanium
chemical_list: D014025:Titanium