Bone Cement Fixation of Stapedotomy Prostheses: Long-term Outcomes in Primary and Revision Stapes Surgery.

Abstract

To describe audiologic outcomes following hydroxyapatite bone cement fixation of stapedotomy prostheses. A retrospective case review at a tertiary neurotology referral center was performed of patients undergoing primary or revision stapedotomy between 2010 and 2017. Patients with hydroxyapatite bone cement fixation of stapes prostheses were assessed. Pre- and postoperative hearing was compared, consisting of air conduction (AC) and bone conduction (BC) pure-tone averages (PTA), air-bone gap (ABG), and word recognition scores (WRS). Short and long-term outcomes were assessed. Forty-six patients with otosclerosis underwent stapedotomy with bone cement fixation: 21 primary cases and 25 revision cases, with an average follow-up time of 17 months. Mean AC PTA was 56 dB preoperatively, and 34 dB postoperatively (P < .0001), while the ABG improved on average from 27 dB to 9 dB (P < .0001). There was no significant difference in postoperative ABG between primary and revision stapes surgery (6 dB vs 10 dB, P = .07). These results persisted through long-term follow-up in a subgroup of patients with significantly longer follow-up time (mean 44 months). There was no significant change in BC PTA or word recognition scores. Three patients underwent subsequent revisions, one patient developed sensorineural hearing loss. Stapedotomy with bone cement fixation of the prosthesis provides excellent hearing outcomes in both primary and revision treatment of otosclerosis. Results are consistent and stable through long-term follow-up. The use of bone cement should be incorporated into the surgical armamentarium of the otologist for the prevention and treatment of loose-wire syndrome and incus necrosis.