Stapedectomy is a surgical procedure that replaces the stapes, the smallest bone in the human body, with a tiny prosthesis to restore hearing lost to otosclerosis. The operation has been performed since 1956 and remains one of the most reliably successful surgeries in all of medicine, with the majority of patients achieving a hearing gap closure to within 10 decibels of normal. But the details matter: the type of procedure, the prosthesis used, the surgeon’s experience, and the individual anatomy all influence how well someone hears afterward and what risks they face.
Why the Stapes Needs Replacing
Sound reaches the inner ear through a chain of three tiny bones in the middle ear. The stapes, the last link in that chain, sits against the oval window of the cochlea and vibrates to transmit sound energy into the fluid-filled inner ear. In otosclerosis, abnormal bone growth gradually locks the stapes in place. The bone remodeling starts at a spot called the fissula ante fenestram, just in front of the oval window, and can spread to immobilize the footplate entirely. A high-resolution CT scan can detect this lucency at the fissula ante fenestram, and when cochlear involvement is also visible, diagnosis becomes more confident.1PubMed. Diagnostic Protocol for Detecting Otosclerosis on High-Resolution Temporal Bone CT As the stapes freezes, sound conduction drops and hearing fades, typically starting with low frequencies and worsening over years.
The cause of otosclerosis is not entirely settled. Genetics play a clear role, as the condition runs in families. But persistent measles virus infection in the bone of the ear capsule has long been suspected as a trigger. Measles virus RNA has been found in the footplates of a majority of surgically confirmed otosclerotic patients, and the virus appears to increase expression of its own cellular receptor in the affected bone.2PubMed. Expression of measles virus receptors in otosclerotic, non-otosclerotic and in normal stapes footplates The current thinking is that measles virus infection may kick off the abnormal bone remodeling process, but only in people who also carry the right genetic susceptibility and possibly an autoimmune component.3PubMed Central. Otosclerosis and Measles: Do Measles Have a Role in Otosclerosis? A Review Article This is one reason some researchers have speculated that widespread measles vaccination could eventually reduce the incidence of otosclerosis, though that remains unproven.
Stapedectomy Versus Stapedotomy
The original operation, developed by John Shea in 1956, involved removing the entire stapes footplate and replacing it with a prosthesis.4PubMed. Evolution of stapedectomy prostheses over time That is a stapedectomy in the strict sense. Over the decades, surgeons moved toward a less invasive version called stapedotomy, in which only a small hole is drilled or lasered into the footplate and a piston-type prosthesis is threaded through it. In everyday conversation and medical coding, “stapedectomy” is often used loosely to refer to both procedures, but the distinction matters for outcomes.
Stapedotomy consistently outperforms full stapedectomy where it matters most. Hearing improvement at middle and high frequencies is better with the smaller-fenestra technique, and vertigo after surgery is shorter.5ORL. Differences in Postoperative Hearing Outcomes and Vertigo in Patients with Otosclerosis Treated with Laser-Assisted Stapedotomy versus Stapedectomy – Section: Abstract Complication rates are also lower with stapedotomy.6PubMed. Stapedectomy Versus Stapedotomy The reason is straightforward: a smaller opening in the footplate means less disruption to the delicate inner ear fluid. Today, stapedotomy is the dominant technique worldwide, and full footplate removal is reserved for unusual cases where the anatomy demands it.
Laser or Drill for the Fenestration
Once surgeons settled on the small-hole approach, the next question became how best to make that hole. The two main options are a CO2 laser and a microdrill. This has been studied extensively, and the consensus from systematic reviews is that hearing outcomes are essentially identical between the two methods.7European Archives of Oto-Rhino-Laryngology. Laser vs drill for footplate fenestration during stapedotomy: a systematic review and meta-analysis of hearing results – Section: Conclusion The one area where a difference emerges is postoperative vertigo: a meta-analysis found that microdrill patients experienced dizziness at a higher rate than laser patients.8PubMed Central. Systematic Review Comparing CO2 Laser and Microdrill in Primary Stapedotomy – Section: Results The likely explanation is that the drill transmits mechanical vibration directly into the inner ear fluid during the fenestration, whereas the laser works without physical contact. Rates of nerve-related hearing loss and taste disturbance did not differ between the two tools.
The practical takeaway from these reviews is that surgeon familiarity with the instrument matters more than the instrument itself. The best results come from an experienced surgeon using whichever tool they have the most comfort and practice with.
Choosing the Prosthesis
The prosthesis is a tiny device, typically a wire or clip that hooks onto the incus (the second bone in the chain) with a piston shaft that extends through the hole in the footplate into the vestibule. Choices include the material and the diameter of the piston, both of which affect hearing results in measurable ways.
The two most common materials are Teflon-platinum and titanium. In one comparative study, closure of the hearing gap to less than 10 decibels was achieved in about 86% of patients receiving a Teflon prosthesis compared with roughly 71% of those receiving titanium, with similar low rates of nerve-related hearing loss for both.9PubMed. Stapedectomy outcomes: titanium versus teflon wire prosthesis A randomized trial, however, found that titanium had a modest advantage in bone conduction at very low frequencies, suggesting better acoustic coupling through the chain in some settings.10Journal of Otolaryngology Studies. Functional Outcomes of Stapes Surgery with Titanium and Teflon Prosthesis: Randomized Controlled Trial – Section: Results Neither material is clearly superior overall, and surgeon preference and the patient’s anatomy usually determine the choice. A newer option is a self-crimping nitinol (nickel-titanium alloy) prosthesis, which uses shape-memory metal to automatically tighten around the incus when it warms to body temperature. Long-term follow-up has shown that the hearing gap closure achieved early after surgery with these prostheses remains remarkably stable for at least 12 years.11Otology & Neurotology. Long-Term Audiometric and Clinical Outcomes Following Stapedectomy With the Shape Memory Nitinol Stapes Prosthesis – Section: Conclusions
Piston diameter also influences results. The two standard sizes are 0.4 mm and 0.6 mm. A study comparing the two found that the wider piston produced better hearing outcomes across the board: greater improvement in air conduction, a smaller postoperative hearing gap, and a higher rate of gap closure to 10 decibels or less (about 75% versus 59%).12PubMed Central. The effect of piston diameter in primary stapes surgery on surgical success – Section: Results Dizziness and complication rates were no different between the two sizes. A meta-analysis confirmed that smaller pistons did not offer any compensating advantage at higher frequencies.13Otology & Neurotology. The Influence of Prosthesis Diameter in Stapes Surgery: A Meta-Analysis and Systematic Review of the Literature The wider piston likely works better because it more closely approximates the natural motion of the stapes footplate. The intact stapes moves in a complex piston-like and rocking motion, and a broader contact area can engage more of the cochlea’s input surface.14PubMed. Contribution of complex stapes motion to cochlea activation
How Well It Works and How Long It Lasts
Short-term hearing results are excellent. Early studies comparing the two surgical approaches found that even with the older full stapedectomy technique, air conduction improved substantially at speech frequencies, and the newer stapedotomy technique did even better, extending improvements to higher frequencies as well.15PubMed. Hearing recovery following large and small fenestra stapes surgery for otosclerosis Most large surgical series report that roughly three out of four patients achieve a hearing gap of 10 decibels or less, which is close to normal.
The question everyone wants answered is whether those results hold up over time. The longest follow-up study in the literature tracked patients for an average of 22 years after surgery. It found no statistically significant decline in the main hearing thresholds at speech frequencies over that period. There was some drop-off at the highest frequencies (8 kHz for air conduction, 2 and 4 kHz for bone conduction), consistent with the natural aging of the inner ear rather than prosthesis failure. Patients reported that their subjective hearing and overall sound perception remained satisfactory.16Audiology and Neurotology. How Long Is Otosclerosis Surgery Effective? Hearing Results after a 22-Year Follow-Up In other words, the surgery works for decades, but the inner ear itself continues to age normally beneath the prosthesis, so gradual high-frequency loss is expected over the very long term.
Complications and What Can Go Wrong
Stapes surgery is low-risk as surgeries go, but it operates millimeters from the inner ear and the brain, so the stakes of any complication are high. The risks worth understanding fall into a few categories.
Taste disturbance is more common than most patients expect. The chorda tympani nerve, which carries taste sensation from the front two-thirds of the tongue, runs directly through the middle ear and is routinely stretched or moved during surgery. A systematic review found that nearly half of patients reported some change in taste in the weeks after surgery, though the long-term rate of persistent problems dropped to about 15%.17Otology & Neurotology. Subjective and Objective Taste Change After Stapes Surgery Systematic Review and Meta-Analysis More severe nerve handling during surgery led to more severe disturbance, underscoring why gentle technique matters.18PubMed. Taste disturbance after stapes surgery: an evaluation of frequency, severity, duration, and quality-of-life Endoscopic stapes surgery, which uses a camera rather than a microscope, has shown a lower rate of chorda tympani injury in a randomized trial, likely because the wide-angle view reduces the need to push the nerve out of the way.19PubMed Central. Chorda tympani injury during endoscopic versus microscopic stapes surgery: a randomized controlled clinical trial
Perilymph fistula is a rarer but more serious risk. If the seal around the prosthesis fails, inner ear fluid can leak into the middle ear, causing fluctuating hearing loss, tinnitus, and vertigo.20JAMA Otolaryngology–Head & Neck Surgery. Perilymph Fistula This can happen in the weeks after surgery or sometimes years later, and it typically requires a return to the operating room to repair the leak.
Sensorineural hearing loss, meaning damage to the inner ear itself rather than just the conductive mechanism, is the most feared complication. Complete deafness on the operated side is exceedingly rare (well under 1% in experienced hands), but some degree of inner ear damage can occur, particularly at high frequencies. This risk is one reason surgeons typically operate on the worse-hearing ear first when both sides are affected.
When Revision Surgery Is Needed
Primary stapes surgery has a high success rate, but when it fails, the second operation is a different story. Revision stapes surgery carries significantly lower success rates, in the range of 45% to 71% even among highly experienced surgeons.21PubMed Central. Revision Stapes Surgery The anatomy is altered by scar tissue and the first prosthesis, making everything more difficult.
The most common reason for revision is prosthesis dislocation, accounting for over half of cases in a large multicenter study, followed by an eroded incus and use of a prosthesis that was too short during the initial procedure.22Acta Otorhinolaryngologica Italica. Stapes revision surgery: intraoperative findings and audiological results. A multicentric study Another series of over 200 revision operations found similar patterns: prosthesis displacement was the most frequent finding, followed by incus erosion and regrowth of bone over the footplate fenestration.23Otology & Neurotology. Revision Stapedectomy: An Analysis of 201 Operations The reduced success rate makes the quality of the first surgery especially important. Choosing an experienced surgeon for the initial procedure is arguably the single most impactful decision a patient can make.
Surgery Versus Hearing Aids
Hearing aids are the main non-surgical alternative for otosclerosis. They work by amplifying sound to overcome the conductive block without touching the underlying problem. For patients who are not candidates for surgery or who prefer to avoid it, modern hearing aids can be effective. But head-to-head comparisons consistently favor stapedotomy on most measures.
A prospective study found that stapedotomy outperformed hearing aids in pure-tone hearing thresholds, quality of life scores, speech recognition in noisy environments, and sound localization accuracy. Stapedotomy also improved tinnitus, something hearing aids did not accomplish.24PubMed. Stapedotomy Versus Hearing Aids in the Management of Conductive Hearing Loss Caused by Otosclerosis: A Prospective Comparative Study Another comparative study confirmed better speech-in-noise recognition, greater low-frequency hearing gain, and higher patient satisfaction with surgery, though both treatments were effective in their own right.25PubMed Central. Comparative hearing outcomes of Stapedotomy and hearing aid rehabilitation in otosclerosis
Cost is worth considering. A cost-effectiveness analysis modeled for a 30-year-old patient found that the lifetime cost of managing otosclerosis with stapedectomy was about $19,400, compared to roughly $16,400 for hearing aids. The surgery cost a bit more but delivered better quality-adjusted life years, working out to under $4,000 per additional quality year gained, a figure that falls well within what health economists consider a good value.26JAMA Otolaryngology–Head & Neck Surgery. Cost-effectiveness of Stapedectomy vs Hearing Aids in the Treatment of Otosclerosis The younger the patient, the more the cost-effectiveness tips in surgery’s favor, since the hearing improvement lasts for decades while hearing aids require ongoing replacement and maintenance.
Far-Advanced Otosclerosis
When otosclerosis progresses to a severe stage, with air conduction thresholds in the 90-plus decibel range and profoundly poor speech understanding, the condition is called far-advanced otosclerosis. At that stage, the decision becomes whether stapes surgery can still help or whether a cochlear implant is the better path.
Stapes surgery can still work in some of these patients. A study of far-advanced cases who underwent stapedotomy achieved an average hearing gap of about 6 decibels with 86% speech discrimination, a genuinely useful recovery for people who had been essentially deaf in that ear.27PubMed Central. Management of Far-Advanced Otosclerosis: Stapes Surgery or Cochlear Implant Another approach combines stapedotomy with high-power hearing aids fitted shortly after surgery. In a case series using this strategy, the average air conduction threshold improved from about 94 decibels before treatment to roughly 64 decibels after surgery and hearing aid fitting, and the average word recognition score jumped from 25% to 62%.28PubMed Central. Treatment of Far-Advanced Otosclerosis: Stapedotomy Plus Hearing Aids to Maximize the Recovery of Auditory Function—A Retrospective Case Series That combination can delay or eliminate the need for cochlear implantation, which is a much bigger surgical undertaking. Still, some far-advanced patients have too much inner ear involvement for stapes surgery to be meaningful, and a cochlear implant becomes the only route to useful hearing.
Stapes Surgery in Children
Otosclerosis usually presents in young adults, but children can also develop a fixed stapes, either through juvenile otosclerosis or congenital stapes fixation (where the bone simply never developed normal mobility). Pediatric stapedectomy is less commonly performed, and the surgical landscape is a bit different from adults.
Overall results are comparable to adult outcomes. In one series of 24 pediatric ears, the average hearing gap dropped from about 35 decibels before surgery to 9 decibels afterward, and results were similar regardless of whether the cause was otosclerosis or congenital fixation.29PubMed. Pediatric stapedectomy: does cause of fixation affect outcomes? However, children with congenital fixation tend to present with worse hearing, undergo surgery younger, and more often have additional abnormalities of the other middle ear bones. A separate study found that juvenile otosclerosis patients achieved a slightly smaller postoperative hearing gap than those with congenital fixation, though both groups improved significantly.30Otology & Neurotology. Outcomes Comparing Primary Pediatric Stapedectomy for Congenital Stapes Footplate Fixation and Juvenile Otosclerosis One concern specific to children is that the rate of delayed inner ear hearing loss may be higher than in adults, so long-term follow-up after pediatric stapes surgery is especially important.
Life After Surgery
Recovery from stapes surgery is relatively quick. Most patients go home the same day and return to desk work within a week or so. Vertigo and unsteadiness are common in the first few days but usually resolve within a week for stapedotomy patients. Hearing improvement can be noticeable as soon as the packing in the ear canal is removed, though full results take several weeks as swelling settles.
One question that comes up regularly is whether activities involving pressure changes are safe after surgery. Scuba diving and skydiving are the main concerns, since rapid pressure shifts could theoretically stress the seal around the prosthesis. A study of patients who returned to scuba diving after stapedectomy found that about 18% experienced some ear symptom while diving, mostly mild pain during descent. One patient developed a perilymph fistula months after diving, though the connection to the dive was uncertain. Among skydivers, about 22% reported symptoms. No significant long-term inner ear damage was found in any of the participants.31PubMed. Diving after stapedectomy: clinical experience and recommendations Most surgeons still advise caution with these activities and recommend discussing the risks individually, but an outright lifetime ban is not universally imposed.
Flying in commercial aircraft is generally considered safe a few weeks after surgery, since cabin pressure changes are relatively mild. Heavy lifting, straining, and nose-blowing are typically restricted for the first few weeks to avoid pressure spikes in the middle ear. Patients are also advised to protect the operated ear from loud noise exposure and to avoid getting water in the ear canal until healing is complete.
Local Anesthesia and Intraoperative Hearing Tests
Stapes surgery can be performed under local or general anesthesia. Many experienced otologists prefer local anesthesia because it allows the patient to be awake and report hearing changes during the procedure. This is not just tradition: intraoperative audiometry under local anesthesia has been shown to predict postoperative hearing outcomes with strong accuracy.32Otology & Neurotology. Intraoperative Audiometry in Primary Stapes Surgery If the prosthesis is well placed, the surgeon can verify a hearing gain on the table and adjust if needed. Under general anesthesia, auditory brainstem response monitoring can serve a similar purpose, though with less nuance. The choice between local and general anesthesia often comes down to the patient’s comfort level and the surgeon’s preference, but the ability to test hearing during the operation is a real advantage of staying awake.