title: Poststapedectomy hearing gain: comparison of a Teflon (fluoroplastic ASTM F 754) prosthesis with a Schuknecht-type wire/Teflon prosthesis.
abstract: We conducted a retrospective study to compare poststapedectomy hearing gain in study-eligible patients who had received a Teflon (fluoroplastic ASTM F 754) prosthesis (study group; n = 76) with hearing gain achieved in a matched group (by age, sex, and degree of hypoacusis) of patients who had received a Schuknecht-type wire/Teflon prosthesis (control group; n = 70). All procedures had been performed by the authors at our institution between Jan. 2, 1994, and Dec. 31, 1997. Airway averages at low, medium, and high frequencies were estimated on the basis ofpre- and postoperative audiologic evaluations, as were total air-bone gaps at 7 frequencies between 125 and 8, 000 Hz. We found that the study group achieved a significantly greater degree of hearing gain at 125 and 250 Hz and significantly better closure of the air-bone gap at 250, 500, 1,000, 2,000, and 4,000 Hz. The hearing outcomes among patients in the study group were excellent.
authors.affiliation: Otorhinolaryngology-Head and Neck Surgery Service, Dr. Gaudencio González Garza General Hospital, La Raza National Medical Center, Mexico City. emiliazepeda@yahoo.com.mx
authors.forename: Emilia Guadalupe
authors.initials: EG
authors.lastname: Zepeda-López
authors.forename: Antonio
authors.initials: A
authors.lastname: Bello-Mora
authors.forename: Manuel Martín
authors.initials: MM
authors.lastname: Félix-Trujillo
mesh_terms: D000293:Adolescent; D000328:Adult; D001864:Bone Wires; D005260:Female; D006309:Hearing; D006801:Humans; D008297:Male; D008875:Middle Aged; D010040:Otosclerosis / Q000601:surgery*; D011138:Polytetrafluoroethylene; D011474:Prosthesis Design; D019919:Prosthesis Implantation; D012189:Retrospective Studies; D013201:Stapes Surgery / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D011138:Polytetrafluoroethylene