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Partial Knee Replacement in Birmingham

Partial knee replacement resurfaces only the worn compartment of the knee, preserving the healthy bone, cartilage, and ligaments in the rest of the joint. Also known as unicompartmental knee replacement or the Oxford knee, it typically offers a more natural feeling and faster recovery than a total knee replacement for carefully selected patients.

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The Procedure

What Is Partial Knee Replacement?

Partial knee replacement, also called unicompartmental knee arthroplasty (UKA), is a surgical procedure that resurfaces only the damaged compartment of the knee while leaving the healthy parts intact. It is most commonly performed on the medial (inner) compartment, which is the most frequently affected by isolated arthritis.

The Oxford knee, manufactured by Zimmer Biomet, is one of the most widely used medial partial knee systems in the world. Mr Hussain is trained in the Oxford knee and other unicompartmental systems.

Who is suitable for partial knee replacement?

Not every patient with knee arthritis is suitable for a partial replacement. The key criteria are:

  • Arthritis confined to one compartment (usually the inner side)
  • Intact anterior cruciate ligament (ACL)
  • Good range of movement, typically over 100 degrees of flexion
  • No significant fixed deformity (usually less than 15 degrees)
  • Absence of inflammatory arthritis such as rheumatoid arthritis

If arthritis is present in two or three compartments, total knee replacement is more appropriate.

Partial vs total knee replacement

Partial knee replacement preserves more native bone and soft tissue. Patients often describe the knee feeling more natural than a total replacement. Recovery is typically faster, with many patients going home the day after surgery and returning to driving in 4 to 6 weeks.

The trade-off is that partial replacement is only appropriate for a minority of patients (roughly 20 to 25 percent of those referred for knee replacement), and there is a small risk of conversion to total replacement if arthritis progresses in other compartments over time.

Implant Types

Oxford Knee and Other Partial Knee Systems

Several partial knee implant systems are available. The most commonly used in the UK is the Oxford knee, which uses a mobile-bearing design where the plastic spacer can glide slightly, mimicking the natural movement of the knee more closely than a fixed-bearing design.

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Oxford Knee (Zimmer Biomet)

The world's most implanted unicompartmental knee. Mobile-bearing design. Available in medial and lateral versions. Extensive 30-year follow-up data.

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Medial Partial Knee

The medial (inner) compartment is the most commonly affected by isolated osteoarthritis. Medial partial replacement is the most frequently performed unicompartmental procedure.

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Patellofemoral Replacement

When arthritis is isolated to the front of the knee (the kneecap joint), patellofemoral replacement resurfaced only that compartment. See the patellofemoral replacement page for more detail.

Recovery

How Quickly Do Patients Recover After Partial Knee Replacement?

Recovery from partial knee replacement is generally faster than from total knee replacement because less bone and soft tissue is disturbed. Typical milestones:

  • Day of surgery: walking with crutches, discharge often the same day or next morning
  • Week 1 to 2: wound healing, gentle exercises, walking around the house
  • Week 4 to 6: most patients stop using crutches, driving assessment
  • Week 6 to 8: return to desk work and light activities
  • 3 to 6 months: return to recreational activities and low-impact sport

Physiotherapy is still important after partial replacement. Mr Hussain provides a structured home exercise programme and outpatient follow-up to guide recovery.

Experience You Can Trust

Specialist Knee Replacement Care in Birmingham

Mr Hussain assesses every patient for partial knee replacement suitability at consultation. When the anatomy is right, partial replacement delivers excellent outcomes with a faster return to daily life.

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Your Questions Answered

Frequently Asked Questions

What is the Oxford knee replacement?+
The Oxford knee is a partial (unicompartmental) knee replacement manufactured by Zimmer Biomet. It is the world's most widely implanted unicompartmental knee system, with over 30 years of clinical follow-up data. It uses a mobile-bearing design, meaning the plastic spacer can move slightly within the implant to mimic the natural movement of the knee. It is suitable for patients with arthritis isolated to the medial (inner) compartment of the knee with an intact anterior cruciate ligament.
How do I know if I am suitable for a partial knee replacement?+
Suitability for partial knee replacement depends on several factors: the arthritis must be confined to one compartment, the cruciate ligaments must be intact, the range of movement should be good, and there must be no significant fixed deformity. The best way to determine suitability is a consultation with Mr Hussain, during which weight-bearing X-rays and a clinical examination will be reviewed. Roughly 20 to 25 percent of patients referred for knee replacement are suitable for a partial procedure.
Can a partial knee replacement be converted to a total knee replacement?+
Yes. If arthritis progresses to other compartments of the knee over time, a partial knee replacement can be revised to a total knee replacement. This conversion is a well-established operation and outcomes are generally good. However, it is a more complex procedure than a primary total knee replacement, so the goal is always to delay conversion as long as possible through good implant selection and activity management.
Is recovery from partial knee replacement really faster?+
For suitable patients, yes. Because only one compartment is resurfaced and the rest of the knee is undisturbed, soft-tissue healing is quicker. Many patients go home the day after surgery, stop using crutches in 4 to 6 weeks, and return to driving sooner than after total knee replacement. However, every patient is different, and recovery time depends on fitness, age, and how much rehabilitation is done.
Will my partial knee replacement feel natural?+
Most patients report that a partial knee replacement feels more natural than a total replacement. This is because the cruciate ligaments and the cartilage in the unaffected compartments are preserved, maintaining more of the normal proprioception and movement pattern of the knee. The Oxford knee's mobile-bearing design also allows a small amount of rotation that fixed-bearing implants do not.
Knee Replacement Guide

Explore more about knee replacement

Ready to Discuss Your Knee Replacement?

Book a private consultation with Mr Hussain at the Royal Orthopaedic Hospital, Priory Hospital Edgbaston, or Harborne Hospital.

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Practice Locations, Birmingham
Woodlands Suite Royal Orthopaedic Hospital Harborne Hospital HCA Healthcare Priory Hospital Edgbaston, Circle Health