الفهرس 
AcknowledgementsOnly 14 pages are availabe for public view
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Abstract
Since John Shea introduced stapedectomy into the treatment of otosclerosis in 1958, this operation has been considered to be the standard method for treatment of otosclerosis. Since then, surgical techniques have developed along two different lines and in general terms, stapes surgery can be divided into the large fenestra technique, stapedectomy and the small fenestra technique, stapedotomy. The majority of patients with conductive deafness, due to otosclerosis, can be treated by stapedectomy. Also patients with severe and profound hearing losses may still be suitable for surgery to enable them to use a hearing aid which was previously of no help. Many controversial points are still excisting such as the ideal age for surgery, bilateral stapedectomy, stapedectomy for unilateral otosclerosis and revision stapedectomy. The aim of this study is to perform detailed analysis of the different prognostic factors which may affect the outcome of stapes surgery. Also to spot light on these controversies. This study was conducted on 648 ears (583 patients) operated upon for otosclerosis at the ORL Department Mansoura University Hospital, Egypt and the ORL.