Time-dependent predictors of bone-anchored hearing implant extrusion after primary implantation: a longitudinal study
Ali Esseili, Tyler J. Gathman, Julio Roque, Lulia Kana, Joseph Norman, Izza Ali, Masanari Kato, Hyunseo Jung, Rachel Goffeney, Sandra Porps, Seilesh BabuAbstract
Objective
To identify clinical risk factors for spontaneous and traumatic extrusion of bone-anchored hearing implants in adults.
Methods
A retrospective cohort study was carried out from 2003 to 2025 at a tertiary-care neurotology centre in adults with primary bone-anchored implantation.
Results
Of 1090 total implanted ears, 73 cases (6.7 per cent) experienced device extrusion. The estimated 10-year incidence of extrusion was 10.2 per cent. Temporal bone radiation and obesity were independently associated with a 5- and 2-fold increased risk of extrusion, respectively, whereas early (<60 days) or frequent (>3 instances) wound complications were not.
Conclusion
Temporal bone radiation and obesity were independent predictors, whereas post-operative wound complications were not. Patients with these risk factors may benefit from close post-operative surveillance.