Ankle replacement surgery: who's suitable, what’s involved and recovery time

Ankle replacement surgery, or total ankle arthroplasty, is an advanced surgical procedure used to treat severe end-stage ankle arthritis. Leading ankle replacement surgeon and tertiary referral foot and ankle surgeon Mr Matthew Welck, who serves patients across London, north London and Hertfordshire, performs this highly specialised operation at the Royal National Orthopaedic Hospital (RNOH) Stanmore. He utilises modern implant designs and weight-bearing CT (WBCT) guided planning to relieve debilitating joint pain while preserving essential movement.

By replacing the worn-out joint surfaces with durable prosthetic components, this procedure allows patients to regain a natural walking pattern and escape the chronic discomfort of bone-on-bone friction. This article explains patient suitability, the surgical process, and the milestones of the recovery timeline.

Mr Welck's tertiary referral practice at RNOH focuses on total ankle replacement, complex foot and ankle reconstruction, and revision ankle surgery - including cases referred in after failed primary procedures. Surgical planning is supported by weight-bearing CT (WBCT) imaging, which captures the joint under load and enables more accurate alignment and implant positioning than standard CT or plain X-rays.

Who is suitable for an ankle replacement in London?

Ankle replacement surgery is primarily designed for individuals with severe, end-stage arthritis, whether that’s caused by osteoarthritis, rheumatoid arthritis, or previous trauma, like a fracture, who have failed to find relief through conservative measures such as physical therapy, bracing, or targeted injections.

Unlike knee or hip replacements, suitability for an ankle replacement depends heavily on the structural alignment of the foot and the quality of the surrounding soft tissues.

Ideal candidates are typically older or lower-demand individuals who wish to preserve their joint mobility. Conversely, patients with severe joint deformity, poor bone quality, active infection, or significant nerve disorders are generally not suited for a replacement.

A comprehensive evaluation - typically including weight-bearing CT (WBCT) imaging to assess alignment under load - is crucial to determine if a replacement is appropriate, or if an alternative procedure, such as an ankle fusion or complex hindfoot reconstruction, would provide a more stable long-term outcome.

What does the surgical procedure involve?

The surgery is a highly precise, meticulously planned procedure performed under general anaesthesia, often combined with a regional nerve block to ensure excellent post-operative pain relief. The surgical team uses weight-bearing CT (WBCT) guided planning and patient-specific instrumentation to ensure accurate placement of the new joint components.

• Surgical approach: A careful incision is made at the front or side of the ankle to access the arthritic joint while protecting the local nerves and blood vessels.
• Bone preparation: The worn, damaged cartilage and a minimal amount of underlying bone are precisely trimmed away from the lower end of the shin bone (tibia) and the top of the ankle bone (talus).
• Component fixation: Highly durable metal components are securely fixed to the prepared bone surfaces, often using a specialised coating that encourages the patient’s natural bone to grow into the implant over time.
• Bearing insertion: A medical-grade plastic (polyethylene) insert is placed between the metal components, mimicking natural cartilage to allow smooth, low-friction joint gliding.

What is the expected recovery timeline?

Recovery from a total ankle replacement is a gradual, structured process focused on protecting the new implant while slowly rebuilding lower limb strength and flexibility. Patients typically spend one or two nights recovering at the hospital before being safely discharged home with blood thinning tablets and pain relief.

During the initial two weeks, the leg is immobilised in a half cast at the back to allow for swelling, and the patient is at home with the leg strictly elevated to reduce swelling. The patient remains non-weight-bearing for the first two weeks. The patient is seen at two weeks, and once the wound is healed they are put into a fibreglass cast and can weight-bear with crutches between weeks 2 and 6. They then go into a removable boot and start physiotherapy.

Most patients are fully weight-bearing by week six. Desk-based workers can often return to their duties within four to six weeks, while driving is usually resumed around week eight (with right-sided ankle surgery; earlier with left-sided), provided the patient can perform an emergency stop safely.

Achieving full strength and experiencing the maximum benefits of the replacement typically takes six to 12 months of consistent physical rehabilitation. In the small number of cases where a primary replacement fails or wears over time, Mr Welck's RNOH practice also takes referrals for revision ankle replacement and complex salvage reconstruction.

About the author

Matthew Welck | Consultant Orthopaedic Foot and Ankle Surgeon, London

Mr Welck is a leading London ankle replacement surgeon and tertiary referral foot and ankle surgeon at the Royal National Orthopaedic Hospital (RNOH) Stanmore, with expertise in total ankle replacement, complex foot and ankle reconstruction, revision surgery and weight-bearing CT (WBCT) guided pre-operative planning. He sees patients from across London, North London and Hertfordshire.

References

• British Orthopaedic Foot and Ankle Society (BOFAS). (2025). Total Ankle Replacement: A Patient's Guide.
• Royal National Orthopaedic Hospital (RNOH). (2024). Clinical Rehabilitation Protocols for Total Ankle Arthroplasty.
• National Institute for Health and Care Excellence (NICE). (2023). Total ankle replacement for end-stage arthritis (IPG763).
• The Bone & Joint Journal. (2022). Long-term survivorship and patient-reported outcomes of modern total ankle replacements: a registry-based study.