Stapedectomy: Restoring Hearing Lost to Otosclerosis
Otosclerosis causes the tiniest bone in the human body — the stapes — to fuse in place, gradually muffling sound. Stapedectomy replaces that stuck bone with a microscopic prosthesis, and for most patients, it brings hearing back.
What Is Stapedectomy?
The stapes is the smallest bone in the human body, shaped like a tiny stirrup, and it's one of three connected bones (ossicles) in the middle ear that transmit sound vibrations to the inner ear. Stapedectomy is a surgical procedure in which all or part of a stapes bone that has become fixed and immobile is removed and replaced with a micro-prosthesis, restoring the bone's ability to vibrate and pass sound along.
What Causes the Stapes to Get Stuck?
- Otosclerosis — the leading cause, an abnormal bone growth process in the temporal bone that gradually fixes the stapes footplate in place
- Genetics — otosclerosis often runs in families and is more common in middle-aged women
- Congenital stapes fixation — a birth abnormality of the stapes, less common than otosclerosis
The stapes is the smallest of the three middle ear bones
Signs and Symptoms
- Gradual, progressive hearing loss, usually starting in one ear and often affecting both over time
- Difficulty hearing low-pitched sounds or soft speech
- Tinnitus (ringing or buzzing in the ear)
- Occasional dizziness or balance disturbance
- A sensation of hearing your own voice differently (autophony)
The hearing loss caused by otosclerosis is typically conductive, meaning sound isn't transmitting properly through the middle ear, as opposed to nerve-related hearing loss.
When Is Surgery Recommended?
Stapedectomy is generally considered once hearing loss is confirmed to be caused by stapes fixation and has progressed enough to affect daily communication — particularly if hearing aids aren't providing adequate benefit or the person prefers a more permanent solution. It should only be performed after other causes of hearing loss have been ruled out through a hearing test and examination.
How the Surgery Works
- Anesthesia. Stapedectomy can be done under local anesthesia with sedation or general anesthesia, often through the ear canal without any external incision.
- Accessing the middle ear. The eardrum is lifted from one side to expose the middle ear space and the fixed stapes bone.
- Removing the fixed bone. The top part of the stapes is removed, and a tiny opening (or complete removal of the footplate, depending on technique) is made in the remaining base.
- Placing the prosthesis. A microscopic piston-like prosthesis is placed connecting the incus (the neighboring bone) to the newly created opening, recreating a working sound pathway to the inner ear.
- Repositioning the eardrum. The eardrum is laid back down over the middle ear, and the ear canal may be lightly packed to support healing.
Recovery
- First few days: Some dizziness, a feeling of fullness, and temporarily muffled hearing (from packing and swelling) are common.
- 1–2 weeks: Packing is removed, and most people can return to non-strenuous activities.
- 4–6 weeks: Hearing gradually improves as swelling resolves; a formal hearing test is usually done at this point to confirm the result.
- Precautions: Avoiding loud noise exposure, heavy straining, air travel, and water in the ear is typically advised for several weeks.
The stapes footplate connects to the oval window of the inner ear
Risks and Considerations
- Temporary or persistent dizziness
- Taste disturbance from irritation of a nearby nerve
- Failure to improve hearing, or, uncommonly, worsening of hearing
- Persistent tinnitus
- Very rare risk of complete hearing loss in the operated ear
Despite these risks, about nine in ten patients experience significantly improved hearing after stapedectomy.
The Takeaway
For hearing loss caused by otosclerosis, stapedectomy offers one of the highest success rates of any ear surgery, often restoring hearing that had been fading for years. If you've noticed gradually worsening hearing, especially if it runs in your family, an ENT evaluation with a hearing test can determine whether stapes fixation is the cause — and whether this procedure could help.