title: TORPs and PORPs: causes of failure--a report on 446 operations.
abstract: This is a review of the causes of failure in 5 1/2 years of personal experience with TORPs and PORPs. Prosthesis extrusion, the cause of failure in less than 5% of 446 TORP and PORP operations, usually was the result of a mucous membrane or eustachian tube problem. Severe sensori-neural hearing impairment occurred in less than 1%, and these were operations in which the oval window was opened. Unsatisfactory hearing was the cause of failure in 18%.
mesh_terms: D003054:Cochlear Implants; D004429:Ear Ossicles / Q000601:surgery*; D004868:Equipment Failure; D006314:Hearing Loss, Conductive / Q000209:etiology; D006319:Hearing Loss, Sensorineural / Q000209:etiology; D006801:Humans; D010033:Otitis Media / Q000601:surgery; D011183:Postoperative Complications; D012086:Reoperation; D013997:Time Factors; D014433:Tympanoplasty / Q000379:methods*