Partial Knee Replacement

What is a partial knee replacement?

Partial knee replacement (also called unicompartmental knee replacement) is a bone-conserving surgical procedure which is an alternative to total knee replacement  where only the damaged part of the knee joint is replaced with an implant, rather than the entire knee

Who is a candidate for partial knee replacement?

It is typically recommended for patients with damage limited to one compartment of the knee (usually the medial, lateral, or patellofemoral compartment) and who have:

• Intact ligaments
• Good knee stability
• No significant knee deformity or stiffness

How is partial knee replacement different from total knee replacement?

In partial knee replacement:

• Only one part of the knee is replaced
• The incision is smaller
• More of the natural bone and ligaments are preserved
• Recovery is often quicker with less pain
• More likely to provide better range of movement
• Lower complication risk

What are the benefits of partial knee replacement?

• Smaller incision and less invasive
• Shorter hospital stay and faster recovery
• Less blood loss and pain after surgery
• More natural feeling knee movement
• Lower risk of complications in some patients
• Easier to convert to a total knee replacement if needed in future than changing a worn total replacement

How long does a partial knee replacement last?

90% of partial knee replacements can last 10–15 years or more, especially when patients avoid high-impact activities and maintain a healthy lifestyle.

Will I still be able to have a total knee replacement in the future if needed?

Yes. If arthritis develops in the rest of the knee, a conversion to a total knee replacement can be done in the future. As partial knee replacement is a bone preserving surgery, future surgery usually is less complicated.

What is recovery like after partial knee replacement?

Most patients walk with assistance the same day or next day. Recovery is typically faster than with total knee replacement, with many patients resuming light activities in 4–6 weeks.

Is physical therapy required after surgery?

Yes, physical therapy is key to restoring strength, range of motion, and joint function. A tailored rehab plan begins soon after surgery.

How long will I be in the hospital?

Many patients go home the same day or within 24 hours, depending on overall health and mobility after surgery.

Can I return to sports or exercise after partial knee replacement?

Yes, low-impact activities such as walking, swimming, biking, and golf are encouraged. High-impact sports may be discouraged to protect the implant.

What kind of anaesthesia is used?

Partial knee replacement can be done under general or spinal anaesthesia, depending on patient preference and surgeon recommendation.

Are there any movement restrictions after surgery?

There are fewer movement restrictions than with total knee replacement. Most patients regain near-normal motion within a few weeks, but individual recovery varies.

What is the success rate of partial knee replacement?

Partial knee replacement has a high success rate, with more than 90% of patients experiencing significant pain relief and improved function for many years.

What are the risks of partial knee replacement surgery?

Potential risks include:

• Infection
• Blood clots
• Implant loosening or wear/dislocation
• Fracture
• Stiffness or limited motion
• Nerve or blood vessel injury
• Continued pain or instability

Why Choose Mr Tumia to Do My Surgery?

Mr Tumia is a senior orthopaedic surgeon with over 30 years of experience in partial and total knee replacement surgery. Mr Tumia has performed a high volume of partial and total knee replacements, consistently achieving excellent outcomes and patient satisfaction. He is dedicated to helping his patients return to their preferred level of activity and enjoy an improved quality of life.

Want to Learn More?

If you’re struggling with knee pain or limited mobility, speak to your GP about your options—including the potential for total or partial knee replacement surgery.

To book an appointment with Mr Tumia:

Contact the Nuffield hospital at Newcastle upon Tyne