SURG-55. NOVEL IQ-DOME APPROACH FOR SUPERIOR SEMICIRCULAR CANAL DEHISCENCE REPAIR REDUCES REVISIONAL SURGERY RATE

Abstract Superior Semicircular Canal Dehiscence (SSCD) is characterized by a thinning of the bony ceiling of the superior semicircular canal, manifesting in auditory and vestibular deficits. Surgical repair is the standard treatment modality of SSCD, with conventional methods including plugging or recapping the defective canal with bone wax, bone chips, muscle, and others. Previous research has shown multiple complications with these conventional materials, including a high rate of failure of the primary repair and the need for revisional surgeries. To address this challenge, we investigated a novel surgical sealing technique using IQ-Dome, a titanium mesh plate overlying the arcuate eminence. We aim to assess the efficacy of IQ-Dome in the repair of SSCD compared to conventional material while evaluating outcome measures including postoperative symptom resolution, complication, and revisional surgery rates. We performed a retrospective analysis of patients undergoing SSCD repair via the middle cranial fossa approach at UCLA between 2017 and 2021. We compared demographics and post-operative outcomes between the application of IQ-Dome and conventional materials. A total of 160 patients undergoing SSCD repair were included in our study, with 80 patients receiving IQ-Dome and 80 patients receiving non-IQ-Dome approaches. 60% of patients in the IQ-Dome cohort and 66.7% of patients in the non-IQ-Dome cohort were female. The mean ages of patients were 45.7 years (range 13-78) in the IQ-Dome cohort and 48.9 years (range 17-69) in the non-IQ-Dome cohort. The surgical revision rates for the IQ-Dome and non-IQ-Dome cohorts were 5.7% and 8.5%, respectively. There was no significant difference in postoperative complications between groups. Thus, IQ-Dome is a safe approach for the surgical management of SSCD, decreasing failure and revision rate by nearly 3% in our patient population and offering an alternative surgical sealing repair intervention. Future studies with larger sample sizes are warranted to further assess the efficacy of IQ-Dome.