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Ankle Fusion (Arthrodesis)

Ankle fusion permanently joins the tibia and talus by removing the remaining cartilage and fixing the bones together with screws until they grow into one solid unit. All ankle motion is gone afterward, but so is the pain. Arthroscopic ankle fusion uses smaller incisions and generally has a shorter recovery than open surgery.

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Ankle Fusion (Arthrodesis) surgery - orthopaedic procedure overview and what to expect

Who Needs Ankle Fusion (Arthrodesis)?

Ankle fusion is for end-stage ankle arthritis — osteoarthritis, post-traumatic, or rheumatoid — that hasn't responded to conservative management. Compared to ankle replacement, fusion is the better option for younger and more active patients, those with significant deformity or bone loss, prior joint infection, or poor bone quality.

What to Expect

1
Weight-bearing X-rays and CT scan to assess bone and joint anatomy
2
Arthroscopic technique: 2-3 small incisions; 1-2 hours under anesthesia
3
Open technique: larger incision with more bone preparation; used for complex cases
4
Cartilage removed from both joint surfaces; bone graft placed between them
5
Screws hold the bones in compression while fusion occurs (3-4 months)
6
Non-weight-bearing cast for 6-8 weeks

Recovery Timeline

Weeks 1-6

Non-weight-bearing in a cast or boot. Leg elevated. No walking on the foot.

Weeks 6-12

Weight bearing starts gradually once X-ray confirms fusion is progressing. Walking boot and physical therapy.

Months 3-4

Most patients transitioning into regular supportive shoes. Walking continues to improve.

Months 4-6

Full weight bearing. Return to most daily activities. Fusion is solid.

Months 6-12

Back to hiking, light sport, most physical activity. Gait patterns adapt over time.

Risks & Complications

  • Non-union (failure to fuse, 5-10%)
  • Hardware irritation requiring screw removal
  • Adjacent joint arthritis (subtalar, midfoot) accelerated after fusion
  • Infection
  • Wound healing complications
  • Nerve injury

Frequently Asked Questions

Will I walk normally after ankle fusion?

Walking works differently after fusion, but most people function well. With no ankle motion, the knee, hip, and midfoot compensate. Most patients walk without a limp and handle most daily activities without issue. High-impact running and jumping aren't realistic, but hiking, cycling, and swimming are fine.

What happens to the joints above and below after ankle fusion?

The subtalar joint and other adjacent joints take on more stress after ankle fusion. Over years, that can speed up arthritis there — sometimes requiring additional surgery later. This trade-off is part of why ankle replacement stays in the conversation for the right patients.

How long does ankle fusion take to heal?

Fusion typically takes 10-12 weeks, confirmed by CT scan. Non-union affects 5-10% of patients and may need a second surgery with bone grafting. Smoking is a major risk factor for non-union, and most surgeons ask patients to quit before operating.

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Estimated Cost

$20,000 - $50,000 (before insurance). Covered by Medicare and most private plans for end-stage arthritis.

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Related Specialty

Foot & Ankle Specialists →

Other Procedures

Total Knee ReplacementTotal Hip ReplacementACL ReconstructionRotator Cuff RepairArthroscopic SurgerySpinal Fusion

This information is for educational purposes only. Costs are estimates and vary by location, surgeon, and insurance. Always consult a qualified healthcare provider.