Tympanosclerosis causes conductive hearing loss because calcification and new bone formation appear in fibrotic tissue as an aftereffect of chronic infection of the middle ear. However, the clinical course of tympanosclerosis is currently unclear. This survey shows the hearing results after surgery for tympanosclerosis in our hospital, and the effect of each factor (surgical procedure, reconstruction material, use of stapes fixation and the stiffness curve) on the hearing result. We have had a 55.6% success rate at 6 months after surgery. The surgery-specific success rates were 50.0% for tympanoplasty types I and IIIc, 66.7% for type IIIi, 0% of type IVc and 60.0% for stapes surgery. The success rate according to the reconstruction material was 66.7% for the incus, 50.0% for cortical bone and TORP (total ossicular replacement prosthesis) and 44.4% for the malleus head. Stapes fixation was performed in 35.5% of the patients, and 30.0% of these procedures were successful. All of the successful cases of stapes fixation were treated with stapes surgery, indicating the importance of stapes surgery. A stiffness curve in the PTA (pure-tone audiometry) was present in 74.2% of the total patients, and 50.0% of these cases were successes. Twenty-eight point six percent of the others (without a stiffness curve) were successfully treated.
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