Stapedectomy and stapedotomy are delicate microsurgical operations designed to correct conductive hearing loss resulting from otosclerosis, a metabolic bone disease affecting the middle ear ossicles. In a healthy middle ear, three small bones—the malleus, incus, and stapes—vibrate in sequence to transfer sound energy from the eardrum to the fluid-filled cochlea. Otosclerosis causes abnormal bone remodeling that immobilizes the stapes footplate within the oval window, preventing mechanical energy transmission.

During a stapedotomy, a surgeon creates a microscopic hole in the stapes footplate and inserts a slender piston-like prosthesis attached to the incus. In a stapedectomy, the entire stapes superstructure and footplate are removed, and a tissue graft is placed over the oval window before inserting the prosthetic link. Both procedures bypass the ankylosed bone, re-establishing mechanical continuity and restoring fluid wave motion inside the cochlea.

Under surgical operating microscope or endoscope visualization, a transcanal tympanomeatal flap is elevated to expose the middle ear cavity. The incudostapedial joint is gently divided using a joint knife. The stapedius tendon is severed with micro-scissors or a laser beam. In a stapedotomy, the stapes arches are micro-fractured or vaporized, leaving the footplate intact. A precise micro-fenestration is created in the posterior half of the stapes footplate using a hand micro-drill, micro-pick, or laser pulses. A piston prosthesis of measured length (typically 4.25 mm to 4.5 mm) and diameter (0.4 mm to 0.6 mm) is placed into the fenestration and crimped around the long process of the incus. In a stapedectomy, the footplate is partially or completely removed, covered with a vein or fascia graft, and a wire-loop prosthesis is positioned against the graft. The flap is repositioned, and gelfoam canal packing is applied.

Evidence-based clinical advantages of stapedectomy and stapedotomy include:

• Restoration of Hearing: Closure of the air-bone gap to within 10 decibels in 85% to 95% of appropriately selected patients (American Academy of Otolaryngology-Head and Neck Surgery criteria).
• Reduced Dependence on Amplification: Allows many patients to discontinue or significantly reduce their use of electronic hearing aids.
• Improved Speech Recognition: Enhanced clarity of high-frequency speech sound processing in noisy environments.
• High Long-Term Stability: Prosthetic coupling durability maintained over decades following complete healing.
• Minimally Invasive Access: Performed primarily through the natural ear canal without external facial incisions.

Initial post-operative recovery occurs over 7 to 14 days, during which patients must maintain strict ear dryness and avoid activities that elevate middle ear pressure, such as heavy lifting, straining, or flying. Mild unsteadiness or transient dizziness is expected during the first 48 to 72 hours due to micro-manipulation near the vestibular labyrinth.

Absorbable packing inside the external auditory canal gradually dissolves or is removed at the 1 to 2 week follow-up visit. Soft tissue healing of the tympanomeatal flap stabilizes by 4 to 6 weeks. Audiometric assessment is performed at 6 weeks to quantify initial hearing gains, with final healing and maximum audiometric benefit typically confirmed at 3 to 6 months post-operatively.

Stapedectomy and stapedotomy are primary surgical interventions for specific otologic conditions affecting middle ear sound conduction:

• Primary Otosclerosis: Abnormal spongy bone growth causing fixation of the stapes footplate.
• Congenital Stapes Fixation: Developmental ankylosis of the stapes bone present from birth.
• Tympanosclerosis: Hyalinization and calcification involving the stapes superstructure and annular ligament secondary to prior chronic otitis media.
• Post-Traumatic Ossicular Fixation: Fibrous or bony fixation following middle ear trauma or skull base fracture.

Pre-operative workup requires comprehensive audiometric evaluation including pure-tone audiometry, speech reception thresholds, word recognition scores, and acoustic reflex testing. A temporal bone high-resolution CT scan is performed to evaluate the facial nerve canal trajectory, rule out inner ear malformations (such as a wide vestibular aqueduct), and quantify the extent of otosclerotic foci. Patients are counseled to avoid aspirin, NSAIDs, and anticoagulants for 7 to 14 days prior to surgery to minimize middle ear bleeding. Baseline vestibular function is documented.

Common and transient side effects include temporary alteration in taste (dysgeusia) due to manipulation of the chorda tympani nerve, mild transient vertigo, and localized ear canal discomfort. Rare but serious complications include sensorineural hearing loss or total deafness (profound hearing loss occurring in 0.5% to 1% of cases), persistent vertigo, facial nerve weakness or paralysis from anatomical variation or laser thermal injury, perilymph fistula, prosthesis displacement, and tympanic membrane perforation.

The clinical journey for middle ear reconstruction begins with a specialized otolaryngology assessment, including comprehensive audiometry and high-resolution computed tomography (HRCT) of the temporal bone to confirm conductive hearing loss and evaluate the middle ear anatomy. Patients undergo pre-operative planning to select the optimal approach and prosthesis size.

On the day of surgery, the procedure is performed under general or local anesthesia with sedation via an endoscopic or transcanal microscopic approach. Most procedures are completed within 60 to 90 minutes as an outpatient service. Patients spend several hours in the post-anesthesia recovery unit before discharge. The post-operative phase involves strict ear precautions, including avoiding pressure changes, blowing the nose forcefully, or getting water in the ear canal. Follow-up audiograms are typically conducted at six weeks, three months, and one year post-surgery to quantify hearing gain and confirm long-term ossicular stability.