Knee Fusion

What is Knee Arthrodesis (Knee Fusion)?

Knee arthrodesis is a surgical procedure that permanently fuses the knee joint so that the femur and tibia heal together as one solid bone.

The goal of the surgery is to:

• Eliminate severe knee pain
• Stabilise the knee joint
• Preserve leg function
• Prevent infection or further joint damage

Although the knee can no longer bend after the procedure, the fused joint provides a stable and pain-free limb, allowing patients to walk and perform daily activities.

This procedure is usually considered when other surgical options such as total knee replacement are not suitable or have failed.

Causes

Knee fusion surgery may be recommended for several serious knee conditions.

Common reasons include:

• Severe knee infection (septic arthritis or infection after knee replacement)
• Failed total knee replacement surgery
• Severe trauma or fractures around the knee
• Extensive bone loss or joint deformity
• Chronic knee pain that does not respond to treatment
• Paralysis or severe muscle weakness around the knee
• Bone tumours around the knee joint
• Severe degenerative conditions such as rheumatoid or inflammatory arthritis

Knee arthrodesis is often considered a salvage procedure when other treatments cannot restore knee function.

Symptoms

Patients requiring knee fusion surgery usually experience severe knee symptoms such as:

• Persistent knee pain
• Severe joint instability
• Difficulty walking or bearing weight
• Significant joint deformity
• Recurrent infections in the knee joint
• Reduced mobility and function

These symptoms often occur when the knee joint is irreversibly damaged.

What Should I Do?

If you are experiencing severe knee pain or complications following knee surgery, it is important to seek medical assessment.

You should:

• Consult an orthopaedic specialist for evaluation
• Follow medical recommendations for treatment
• Begin physiotherapy rehabilitation after surgery
• Follow post-surgical care instructions carefully

Early physiotherapy involvement helps support recovery and improve functional outcomes.

Physiotherapy Treatment

Physiotherapy plays a critical role in recovery after knee arthrodesis surgery.

At ACE Physio Sports, physiotherapy programs focus on improving strength, mobility, and adapting to a fused knee.

Treatment goals include:

• Reducing pain and swelling
• Maintaining strength in surrounding muscles
• Improving walking ability
• Preventing post-surgical complications
• Helping patients adapt to daily activities

Rehabilitation typically progresses in stages.

Early Stage Physiotherapy

During the early recovery period, the knee is immobilised in a long leg cast to allow the bones to fuse properly.

Physiotherapy during this stage focuses on:

• Gentle ankle pumps to improve circulation
• Isometric strengthening exercises for the thigh and hip
• Static quadriceps and gluteal exercises
• Mobility training using elbow crutches
• Breathing and circulation exercises to reduce the risk of complications such as deep vein thrombosis (DVT)

These exercises help maintain muscle strength and promote healthy circulation.

Intermediate Stage Physiotherapy

Once the fusion begins to stabilise and the cast is removed, physiotherapy focuses on gradually increasing activity levels.

Treatment may include:

• Progressive weight-bearing exercises
• Gait re-education to improve walking pattern
• Balance and proprioception training
• Strengthening exercises for the hip, quadriceps, hamstrings, and calf muscles
• Mobility exercises for surrounding joints such as the hip and ankle

This stage helps patients adapt to walking with a fused knee.

Advanced Rehabilitation Stage

After several months of rehabilitation, physiotherapy focuses on improving overall function and mobility.

Exercises may include:

• Advanced balance and coordination training
• Functional movement exercises for daily activities
• Progressive resistance strength training
• Low-impact cardiovascular exercises such as cycling or swimming
• Core strengthening and posture training

This stage helps patients regain confidence and independence in daily movement.

What Shouldn’t I Do?

After knee fusion surgery, avoid:

• Bearing weight too early before medical clearance
• Ignoring swelling or persistent pain
• Skipping physiotherapy sessions
• Performing high-impact activities too soon
• Attempting to bend the fused knee joint

Following rehabilitation guidelines is essential for successful recovery.

Long-Term Effects or Recovery

After knee arthrodesis, the knee joint will remain permanently straight and immobile.

However, many patients experience:

• Significant pain relief
• Improved stability of the leg
• Better ability to walk and perform daily activities

Recovery success depends on:

• Bone healing and fusion stability
• Strength of surrounding muscles
• Commitment to physiotherapy rehabilitation

Most patients gradually adapt to walking with a fused knee and regain functional mobility.

Why Choose ACE Physio Sports

At ACE Physio Sports, we provide specialised post-surgical physiotherapy rehabilitation for complex joint conditions.

Our physiotherapists offer:

• Evidence-based rehabilitation programs
• Personalised recovery plans
• Strength and mobility training
• Gait re-education and balance training
• Long-term mobility and function support

Our goal is to help patients adapt confidently to their fused knee and regain independence in daily activities.

Book an Appointment

If you are recovering from knee fusion surgery or need expert post-surgical rehabilitation, physiotherapy can help support your recovery.

ACE Physio Sports

Website: acephysiosport.com Phone: +65 81535374 Email: admin@acephysiosport.com

Contact us today to arrange your physiotherapy consultation.