What Is a Total Ankle Replacement?

When an ankle has been worn down by arthritis, surgeons essentially offer two opposite answers to the same problem. One operation removes the joint's movement altogether. The other — a total ankle replacement — rebuilds the joint so it can keep moving. If you're weighing up ankle surgery, understanding that contrast is the most useful place to start, because almost every difference in recovery and long-term feel flows from it. The video at the top of this page, "Total Ankle Replacement" (about three and a half minutes), walks through the replacement operation itself, from the anaesthetic to the splint that goes on at the end.

Two operations, one worn-out joint

Ankle arthritis means the smooth cartilage covering the ends of the shin bone (tibia) and the ankle bone (talus) has worn away, so the joint becomes painful and stiff — our overview of osteoarthritis covers how that wearing-away process happens in joints generally. A replacement tackles it by removing the damaged bone and cartilage ends and fitting new artificial surfaces, so the joint can still hinge. A fusion tackles the same pain from the other direction: the bones are joined together permanently, so the painful surfaces can no longer rub — at the cost of the joint's up-and-down movement. You can see the fusion approach in this ankle fusion surgery video, which explains how the tibia and talus are joined, with the smaller fibula occasionally involved depending on the technique. Neither answer is automatically "better" — they trade movement against simplicity, and the rest of this article follows that trade-off.

Inside a replacement, step by step

The anchor video lays the operation out plainly. It's done under a general anaesthetic or a nerve block, with a tourniquet around the leg to control bleeding and give the surgeon a clearer view. The ankle is approached from the front or the side, depending on the type of implant being used. The worn ends of bone are then cut and shaped so that the new components — metal pieces with a plastic insert between them — can be placed to re-create the ankle joint. Sometimes the calf muscle or Achilles tendon is tight enough to limit movement, and the surgeon lengthens it as part of the same operation to improve the ankle's range of motion. Finally, the wound is closed with stitches or staples and a splint is applied. It's the same broad idea used in other joint replacements — our knee replacement hub walks through the knee version, and our guide to hip replacement covers the hip — but the ankle is a smaller, more tightly balanced joint, which is part of why the details matter so much.

Recovery: where the two paths meet, and where they split

Whichever operation you have, the early weeks look surprisingly similar. After a replacement, the video is explicit that a period of non-weightbearing in a cast or cast boot is necessary, so the implants can heal in place; fusion patients likewise protect the leg while the bones knit. Swelling that takes months to fully settle, and physiotherapy to rebuild strength and gait, are part of both roads. The paths split later. A successful replacement preserves a working hinge, so walking tends to feel more natural, particularly on uneven ground. A fused ankle stays stiff by design, and the movement it no longer provides has to come from the joints around it, which can ache over time. In exchange, fusion asks nothing of an implant: there is no artificial bearing to wear out or loosen.

The honest limits of an implant

That last point deserves its own moment, because it's the question patients usually ask second — how long will it last? Like any artificial joint, an ankle replacement can wear or loosen over the years, and a replacement that fails may need further surgery, which can mean converting it to a fusion. A replacement also isn't a return to a teenage ankle: high-impact activity is generally discouraged, because it loads the implant harder. None of that makes the operation a poor choice — it makes the choice a genuine one, between keeping movement with a device that needs looking after, and giving movement up for a joint that simply stays put. Your surgeon should talk through your age, activity, ankle alignment, and bone quality before recommending either, because those details — not the diagnosis alone — usually decide it.

References & further reading

• MedlinePlus — Ankle Replacement (Medical Encyclopedia): https://medlineplus.gov/ency/article/007254.htm
• MedlinePlus — Ankle Injuries and Disorders: https://medlineplus.gov/ankleinjuriesanddisorders.html
• MedlinePlus — Osteoarthritis: https://medlineplus.gov/osteoarthritis.html
• National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) — Osteoarthritis: https://www.niams.nih.gov/health-topics/osteoarthritis

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.

Frequently Asked Questions

What is the difference between an ankle replacement and an ankle fusion?

A replacement fits metal and plastic components where the worn joint surfaces were, so the ankle can still move. A fusion joins the tibia and talus together permanently, removing the pain from the worn surfaces but also removing the joint's movement. The videos on this page show one of each.

Will I be able to walk normally afterwards?

Most people walk much more comfortably once the arthritis pain eases, and a replacement usually gives a more natural stride because the joint still hinges. There is a protected period first — non-weightbearing in a cast or boot while things heal — followed by physiotherapy, and swelling can take months to fully settle.

How long does an ankle replacement last?

No artificial joint lasts forever, and an ankle implant can wear or loosen over time. If that happens, further surgery may be needed, and a failed replacement is sometimes converted to a fusion. Your surgeon can explain what follow-up and activity guidance apply to the implant you receive — this article deliberately gives no single lifespan figure, because it varies by implant, patient, and use.

Is the operation done while I'm awake?

The video on this page explains that the surgery is performed either under a general anaesthetic or under a nerve block, with a tourniquet used during the operation. Your anaesthetic team will discuss which approach fits you.

Can anything else be done at the same time?

Sometimes, yes. If a tight calf muscle or Achilles tendon is limiting the ankle's movement, the surgeon may lengthen it during the same operation to improve range of motion, as the video at the top of this page describes.

This article is for general education only and is not medical advice. It does not replace consultation with a qualified clinician. Whether an ankle replacement, a fusion, or non-surgical care is appropriate for you can only be decided by your own care team after examination and imaging.

Dr. Mohamed Ibrahim, MD, PhD

Physician-scientist · Founder, MedicalVideos.com

Dr. Ibrahim founded MedicalVideos.com in 2007 to make medical and surgical education freely accessible to students, clinicians, and patients.

Last reviewed: 11/10/26