Ankle replacement surgery can relieve persistent pain, improve mobility, and preserve movement in the ankle joint when severe arthritis has damaged the joint.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
However, like any major surgery, it carries potential risks and complications. Understanding these risks can help you have a more informed discussion about whether ankle replacement is appropriate for you and what recovery may involve.
If you are considering ankle replacement surgery, your individual risk depends on factors such as your overall health, bone quality, ankle alignment, activity level, and the condition of the soft tissues around the joint.
Is Ankle Replacement Surgery Safe?
Total ankle replacement is generally considered a well-established treatment for selected patients with advanced ankle arthritis. Modern implants and improvements in surgical techniques have made the procedure more predictable than earlier generations of ankle replacement.
Nevertheless, ankle replacement is a complex procedure. Complications can occur during surgery, shortly afterward, or months or years later. Some complications may be treated without another operation, while others may require additional surgery.
Common Risks After Ankle Replacement Surgery
Some problems are relatively common during the early recovery period and may improve as healing progresses.
Pain and swelling
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Swelling, discomfort, and stiffness are expected after ankle replacement surgery. Swelling can sometimes persist for several months, particularly after prolonged standing or activity.
Following the prescribed rehabilitation plan, elevating the leg, and gradually increasing activity can help manage these symptoms.
Stiffness and limited movement
One of the main goals of ankle replacement is to preserve joint movement. However, the ankle may remain stiff after surgery. Scar tissue, swelling, muscle weakness, or inadequate rehabilitation can contribute to restricted movement.
Physical therapy is often an important part of recovery and may help restore strength, flexibility, balance, and functional movement.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
Wound-healing problems
The skin around the ankle has relatively limited soft-tissue coverage. As a result, problems with incision healing can occur. These may include delayed healing, wound breakdown, or irritation around the surgical incision.
People who smoke or have conditions that affect blood circulation or wound healing may have a higher risk of these problems.
Infection After Ankle Replacement
Infection is an important complication because an ankle replacement involves placing artificial components inside the joint. Infection can occur soon after surgery or, less commonly, develop later.
A superficial infection may sometimes be treated with medication and wound care. A deeper infection involving the implant may require more extensive treatment and, in some cases, additional surgery.
Warning signs can include increasing redness, warmth, drainage from the incision, fever, worsening pain, or swelling that is becoming more severe rather than gradually improving.
Blood Clots
Reduced mobility after surgery can increase the risk of developing a blood clot in a deep vein, known as deep vein thrombosis (DVT). A clot can cause pain, swelling, warmth, or tenderness in the leg.
In rare cases, part of a clot can travel to the lungs and cause a pulmonary embolism. Sudden shortness of breath, chest pain, coughing up blood, or unexplained rapid breathing requires urgent medical attention.
Nerve or Blood Vessel Injury
Nerves and blood vessels are located around the ankle. Although uncommon, they can be injured during surgery. Nerve irritation or injury may cause numbness, tingling, altered sensation, weakness, or persistent discomfort. Blood vessel injury is uncommon but can affect circulation and may require prompt treatment.
Implant Loosening or Failure
Ankle replacement components are designed to remain securely positioned and function together during movement. Over time, however, an implant may loosen or become damaged.
Loosening may cause increasing pain, instability, or difficulty walking. Sometimes the problem can be monitored, while significant implant failure may require revision surgery.
Bone Fracture Around the Implant
A fracture can occur around an ankle replacement, either during surgery or later as a result of an injury or weakened bone. The treatment depends on the location and severity of the fracture and the stability of the implant.
Changes in Ankle Alignment or Stability
Correct alignment and stability are important for the long-term function of an ankle replacement. If the ankle remains significantly misaligned or becomes unstable, the implant may experience abnormal forces.
Some patients may require additional procedures at the time of ankle replacement to address deformity, ligament instability, or problems involving nearby structures.
Wear of the Implant
The moving surfaces of an ankle replacement can gradually wear over time. Wear particles may contribute to inflammation around the implant and, in some cases, bone loss or loosening.
Implant wear is generally a longer-term concern rather than an immediate postoperative complication. Regular follow-up can help identify changes before they become more serious.
What Is Implant Subsidence?
Subsidence occurs when an implant component gradually settles or sinks into the surrounding bone. It can affect the position and function of the ankle replacement.
Small changes may sometimes be monitored, but significant subsidence can lead to pain, instability, or loss of proper alignment and may require further treatment.
Could an Ankle Replacement Need Revision Surgery?
Yes. Although ankle replacements are designed to provide long-term pain relief and function, some eventually require additional surgery.
Revision surgery may be considered because of infection, implant loosening, wear, subsidence, instability, fracture, or other mechanical problems. The type of revision depends on the underlying cause and the condition of the bone and surrounding tissues.
A failed ankle replacement does not automatically mean that the only option is to remove the implant and fuse the ankle. Treatment depends on the individual circumstances.
How Can You Reduce the Risk of Complications?
Not every complication can be prevented, but several measures can support safer recovery:
- Follow your surgeon's weight-bearing instructions carefully.
- Keep the surgical wound clean and follow wound-care instructions.
- Attend recommended follow-up appointments.
- Complete physical therapy as advised.
- Avoid smoking because nicotine can interfere with healing.
- Control conditions such as diabetes and vascular disease as advised by your doctor.
- Do not return to high-impact activities before your ankle has adequately healed.
- Report unusual pain, swelling, wound changes, fever, or other concerning symptoms promptly.
*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.
The Bottom Line
Ankle replacement surgery can provide meaningful pain relief and preserve ankle movement for appropriately selected patients with severe arthritis. However, it is not free from risk. Infection, wound-healing problems, blood clots, nerve or blood vessel injury, implant loosening, instability, fracture, wear, and the need for revision surgery are among the possible complications.
The decision to undergo ankle replacement should consider both the potential benefits and the individual risks. Careful preoperative assessment, appropriate implant positioning, adherence to weight-bearing restrictions, rehabilitation, and long-term follow-up all play an important role in achieving the best possible outcome.
