Otosclerosis is a condition where there is an overgrowth of bone in the space behind the eardrum and the inner ear. Symptoms include tinnitus, dizziness, and some hearing loss, with severe hearing loss developing as the middle and inner ear become less functional.


  • When the overgrowth develops at the edge of the stapes footplate, the stapes bone cannot move like it should and sound is not passed properly from the middle ear to the inner ear. This causes conductive hearing loss and can often be repaired.
  • When the overgrowth replaces bone in other parts of the otic capsule, a sensorineural hearing loss results. The nerve hearing loss can’t be repaired.


  • Hearing aids are usually very effective early in the course of the diseases.
  • A surgery called a stapedectomy may be required for a more definitive treatment. A stapedectomy consists of removing a portion of the sclerotic stapes footplate and replacing it with an implant that is secured to the incus. It restores continuity of ossicular movement and allows passage of sound waves from the eardrum to the inner ear.