BONEBRIDGE Bone Conduction Implant in Adults

Inclusion Criteria: * Adults, 18 years of age or older at the time of implantation * Conductive or mixed hearing loss, defined as: * Conductive hearing loss with pure-tone average (PTA) for bone conduction thresholds better than or equal to 25 dB at 500, 1000, 2000 and 3000 Hz * Mixed hearing loss with PTA for bone conduction thresholds better than or equal to 45dB at 500, 1000, 2000, and 3000 Hz * Air-bone gap greater than or equal to 30 dB at 500, 1000, 2000, and 3000 Hz * Ability to benefit from amplification as defined by a monosyllabic (CNC) word score of 30% correct or better * Bilateral BONEBRIDGE can be considered if the difference in PTA for bone conduction thresholds is 10 dB or less between the right and left ears * Prior experience with acoustic or bone conduction hearing aids, unless candidate is unable to wear amplification for medical reasons * Able to complete testing materials in English * CT scan indicating the patient's anatomy is adequate to enable placement of the implant * Ability to undergo general anesthesia * Appropriate motivation and expectation levels * Stated willingness to comply with all study procedures for the duration of the study Exclusion Criteria: * Evidence that hearing loss is retrocochlear in origin * Skin or scalp condition precluding use of external audio processor * Suspected cognitive impairment or organic brain dysfunction