Health guide · Podiatry
Total ankle replacement vs ankle fusion, and rearfoot reconstruction
How total ankle replacement and ankle fusion compare for ankle arthritis, what rearfoot reconstruction fixes, who each suits and what recovery is like.
The short answer
For severe ankle arthritis, the two main operations are ankle fusion, which joins the ankle bones so the joint no longer moves, and total ankle replacement, which swaps the worn joint surfaces for metal and plastic parts so the ankle keeps moving. Both reliably relieve pain, and in a large trial people improved about equally after a year. Replacement keeps more motion but can wear out; fusion is permanent but adds strain to nearby joints over time.
Rearfoot reconstruction realigns a collapsed or tilted heel and arch. All of these are major operations with months of recovery, usually considered only after bracing, shoes and injections stop working.
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This guide is for general information and is not a diagnosis. Some services may not be offered at every office; your provider will go over your treatment options at your appointment.
When ankle surgery is considered
This guide explains three kinds of foot and ankle surgery: total ankle replacement and ankle fusion, the two main operations for severe ankle arthritis, and rearfoot reconstruction, which corrects a heel and arch that have collapsed or tilted out of line. They’re all major operations, usually considered only after non-surgical treatment has stopped working.
Ankle arthritis in brief
The ankle joint is where the shinbone (tibia) and the smaller outer leg bone (fibula) meet the ankle bone (talus). In arthritis, the smooth cartilage covering these bones wears away, so bone rubs on bone. That causes:
- deep aching pain in the ankle, worse with walking and standing
- stiffness, especially in the morning or after sitting
- swelling
- trouble on stairs, slopes and uneven ground
Unlike the knee and hip, ankle arthritis most often follows an old injury, such as a broken ankle or years of repeated sprains. It can also come from rheumatoid arthritis and other inflammatory conditions.
A podiatrist diagnoses it with an exam and X-rays taken while you stand, sometimes with a CT or MRI scan.
What to try before surgery
Most people start here, and many manage for years:
- Change the activities that hurt most. Swap running and jumping for cycling, swimming or walking on flat ground.
- Lose weight if you need to. Less body weight means less load on the ankle with every step.
- Wear a brace. A lace-up ankle brace, or a custom brace that holds the ankle steady, can ease pain.
- Choose the right shoes. A cushioned heel and a rocker-shaped sole help the foot roll forward without bending the ankle as much.
- Use a cane in the hand opposite the painful ankle.
- Try physical therapy for strength, balance and walking.
- Take pain relievers such as ibuprofen or naproxen, or use an anti-inflammatory gel, if they’re safe for you.
- Consider a steroid injection into the joint, which can relieve pain for weeks to months.
Other injections, such as hyaluronic acid or platelet-rich plasma (PRP), are sometimes offered. The evidence for them in the ankle is weak: a placebo-controlled trial found PRP worked no better than saltwater injections for ankle arthritis. See our PRP guide.
Learn more about how we treat arthritic conditions.
Surgical options for ankle arthritis
- Arthroscopic cleanup: for earlier arthritis with bone spurs at the front of the ankle, a surgeon can remove the spurs through small cuts using a camera.
- Realignment surgery: when arthritis affects only one side of the joint, cutting and repositioning a bone can shift weight onto healthier cartilage.
- Ankle fusion (arthrodesis): the worn joint surfaces are removed and the bones are held together with screws or a plate until they heal into one solid bone.
- Total ankle replacement (arthroplasty): the worn surfaces are replaced with metal parts on the shinbone and ankle bone, with a plastic insert between them that lets the joint move.
Ankle replacement vs ankle fusion
| Ankle fusion | Total ankle replacement | |
|---|---|---|
| What it does | Joins the bones into one, so the ankle joint no longer moves | Replaces the worn surfaces with metal and plastic parts |
| Pain relief | Reliable | Reliable |
| Ankle movement | Up-and-down ankle motion is lost; joints in the foot make up for some of it | Some motion is kept |
| Walking | Usually good on flat ground; hills and uneven ground are harder | Often a little smoother, especially on slopes and stairs |
| How long it lasts | Permanent once the bone has healed | Parts can loosen or wear out; a revision may be needed years later |
| Long-term effects | Extra strain on nearby foot joints can lead to arthritis in them over many years | Less strain on nearby joints |
| Early recovery | Often 6 to 12 weeks with little or no weight on the foot, until the bone fuses | Often weight on the foot sooner, in a boot |
| Often suits | Younger, very active people or heavy manual workers; severe deformity; poor bone; past infection | People with good bone and alignment and a lower-impact lifestyle |
A large UK trial that compared the two operations in people with severe ankle arthritis found they improved about equally after a year. So the choice often comes down to your age, activity, bone quality, ankle alignment and other health conditions, and your own priorities.
Who is a good candidate for total ankle replacement?
Ankle replacement generally suits people who:
- have severe ankle arthritis that limits daily life despite non-surgical care
- have good bone quality and an ankle that’s reasonably straight, or can be straightened during surgery
- have healthy skin, good blood flow and normal feeling in the foot
- want to keep some ankle movement and are happy to avoid running and jumping sports afterward
It usually isn’t advised if you have:
- an ankle infection now or in the past
- severe nerve damage (neuropathy) or Charcot foot
- poor circulation in the leg
- collapse or loss of blood supply to the ankle bone (avascular necrosis)
- a deformity too severe to correct, or loose ligaments that can’t be stabilized
- heavy physical work or plans for high-impact sport
Smoking and poorly controlled diabetes raise the risk of wound and healing problems after either operation.
How long does an ankle replacement last?
Studies suggest most modern ankle replacements are still working 10 years after surgery, but results vary with the implant, the surgeon’s experience and how hard the ankle is used. If the parts loosen or wear out, a revision operation may be needed, or the ankle may be converted to a fusion. Ask your surgeon how many ankle replacements they do and which implant they use.
Risks of ankle surgery
Both operations carry risks of:
- infection and slow wound healing, because the skin around the ankle is thin
- blood clots in the leg
- injury to nerves, causing numbness, or to blood vessels or tendons
- ongoing pain, stiffness or swelling
After a fusion, the bones may fail to heal together (a nonunion), which is much more likely if you smoke, and nearby joints can wear faster over the years.
After a replacement, the parts can loosen or wear, a bone near the implant can crack during or after surgery, and more surgery is sometimes needed.
Recovery after ankle replacement or fusion
These are typical ranges. Your surgeon’s plan comes first.
| Time after surgery | Ankle replacement | Ankle fusion |
|---|---|---|
| 0 to 2 weeks | Splint, no weight on the foot, foot raised most of the time | Splint or cast, no weight on the foot, foot raised most of the time |
| 2 to 6 weeks | Boot; gentle ankle movement exercises; weight gradually added as your surgeon allows | Cast or boot; usually still little or no weight on the foot |
| 6 to 12 weeks | Walking in the boot, then moving into a supportive shoe; physical therapy | X-rays or a CT scan check healing; weight added gradually in a boot once the bone is fusing |
| 3 to 6 months | Most daily activities; strength and balance work | Into a supportive shoe, often with a rocker sole; physical therapy |
| 6 to 12 months | Swelling settles; continued improvement | Swelling settles; continued improvement |
Plan for help at home in the first weeks, a knee scooter, crutches or walker, and a chair in the shower. If the surgery is on your right ankle, you won’t be able to drive until you’re out of the boot and can brake safely, often 2 to 3 months or more. Physical therapy helps restore strength, balance and a normal walking pattern; see post-surgical rehabilitation.
Rearfoot reconstructive surgery
The rearfoot is the back part of the foot: the heel bone (calcaneus), the ankle bone (talus) and the joints between them and the middle of the foot. These joints let the foot tilt in and out on uneven ground. When they collapse, tilt or wear out, rearfoot reconstruction can realign and stabilize the foot.
What it treats
- Progressive collapsing foot deformity, also called adult-acquired flatfoot, usually caused by a failing posterior tibial tendon, the tendon that holds up the arch. See flat feet: when to worry.
- A high arch with the heel tilted inward (cavovarus foot), which often causes repeated ankle sprains and pain on the outside of the foot. See torn ligament in the ankle.
- Arthritis in the heel joints, often after an old heel fracture.
- Tarsal coalition, where two foot bones are joined together from birth, causing a stiff, painful flat foot.
- Charcot foot, a collapse of the foot’s bones that can happen with diabetic nerve damage. See our guide to diabetic foot care.
What the surgery involves
Reconstruction is tailored to each foot and often combines several procedures:
- cutting and shifting the heel bone (calcaneal osteotomy) to bring the heel back under the leg
- tendon transfers, using a healthy tendon to do the job of a failed one
- lengthening a tight calf muscle or Achilles tendon
- repairing or rebuilding ligaments
- fusing one or more rearfoot joints when they’re arthritic or the deformity is severe
Before surgery, most people try a supportive brace, custom orthotics, physical therapy and a walking boot during flare-ups.
Recovery from rearfoot reconstruction
Recovery is similar to or longer than an ankle fusion. Expect a splint, then a cast or boot, and usually 6 to 8 weeks or more with little or no weight on the foot, longer if joints were fused. Most people are in a supportive shoe by around 3 months and keep improving for 6 to 12 months or more.
Questions to ask your surgeon
- Which operation do you recommend for me, and why not the others?
- How many of these operations do you do each year?
- How long will I need to keep weight off my foot, and when can I drive and go back to work?
- What are the most likely complications for someone like me?
- What will I be able to do afterward, and what should I avoid?
- If this is an ankle replacement, which implant do you use, and what happens if it wears out?
When to see a podiatrist
Get seen the same day if:
- you can’t put weight on your foot after an injury
- your ankle is red, hot and swollen, or you have a fever
- you have diabetes or numb feet and your foot becomes warm, red and swollen without an obvious injury, which can be a sign of Charcot foot
Book a visit if:
- ankle pain, stiffness or swelling lasts more than a few weeks, or keeps coming back
- your ankle keeps giving way
- your arch seems to be collapsing, or one foot looks flatter than the other
- non-surgical treatment isn’t controlling your pain anymore
An Evolve Health podiatrist can examine your ankle, take X-rays, try non-surgical treatment and talk you through the surgical options, including reconstructive foot and ankle surgery. Ask at your visit which procedures are offered near you. If you’re not sure whether to see a podiatrist or an orthopedic surgeon, see podiatry vs orthopedics. You can find a podiatrist near you and book online.
Questions, answered
An ankle fusion joins the shinbone and the ankle bone with screws or a plate so they heal into one solid bone. The arthritic joint no longer moves, so it no longer hurts. A total ankle replacement removes the worn joint surfaces and replaces them with metal and plastic parts, so the ankle keeps some up-and-down movement. Both relieve pain well; they differ in motion, durability and who they suit.
Ankle replacement generally suits people with severe ankle arthritis who have good bone quality, a reasonably straight ankle or one that can be corrected, healthy skin and blood flow, and a lower-impact lifestyle. It usually isn’t advised for people with an ankle infection now or in the past, severe nerve damage or Charcot foot, poor circulation, collapse of the ankle bone, or heavy physical work.
Studies suggest most modern ankle replacements are still working 10 years after surgery, but results vary with the implant, the surgeon’s experience and how the ankle is used. The parts can loosen or wear out over time, and a second operation, called a revision, may be needed. Ask your surgeon about their experience and the implant they use.
Expect a splint and then a boot, with little or no weight on the foot for the first few weeks, then gradually more walking in the boot. Most people are in a regular shoe by about 2 to 3 months, back to most daily activities by 3 to 6 months, and still improving, with swelling settling, for up to a year.
The bones usually take about 3 months to fuse. You’ll typically keep weight off the foot, or walk only in a cast or boot, for 6 to 12 weeks, depending on your surgeon’s approach and how the bone is healing. Most people are in a regular shoe by around 3 to 4 months, and recovery continues for up to a year.
Most people walk well on flat ground after an ankle fusion, often with little or no limp, because the joints in the foot below the ankle take over some of the movement. Hills, stairs and uneven ground are harder. A shoe with a rocker-shaped sole can make walking smoother.
Running and jumping sports are usually not recommended after an ankle replacement, because high impact can wear out or loosen the parts faster. Walking, cycling, swimming, golf and hiking are usually fine once you’ve recovered. Your surgeon will tell you which activities suit your ankle.
Rearfoot reconstruction is surgery on the heel and the joints just below and in front of the ankle to correct a deformity or instability. It’s used for problems such as a collapsing flatfoot, a high arch with the heel tilted inward, arthritis in the heel joints and severe Charcot foot. It can combine bone cuts, tendon transfers, ligament repair and joint fusions.
Most people start with activity changes, weight loss if needed, a supportive ankle brace, shoes with a cushioned heel and rocker sole, anti-inflammatory pain relievers if they’re safe for you, physical therapy and steroid injections. A cane in the opposite hand also helps. Surgery is usually considered when pain limits daily life despite these.
This guide is for general education and doesn’t replace advice from your own doctor. Everyone’s situation is different, so talk to a healthcare provider about symptoms that are new, getting worse or worrying you. If you think you may have a medical emergency, call 911. Reading this guide doesn’t make you a patient of Evolve Health.
Want a specialist to take a look?
A guide can explain, but it can’t examine you. Evolve Health providers see patients across Florida and Texas, and you can book online any time.
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