Partial Knee Replacement
Also known as: unicompartmental knee replacement (UKR)
This name reflects the fact that the procedure targets only one of the three compartments of the knee—either the medial (inner), lateral (outer), or patellofemoral (under the kneecap) compartment—while preserving the healthy parts of the knee joint.
What is partial knee replacement surgery?
Partial knee replacement, also known as unicompartmental knee replacement, is a surgical procedure to replace only the damaged portion of the knee joint with a prosthesis, leaving the healthy areas intact. This joint replacement surgery is often recommended for individuals whose knee damage is localised to a specific compartment of the knee, such as the medial (inner) or lateral (outer) side, or the patellofemoral compartment (under the kneecap).
The primary goal of partial knee replacement is to relieve pain, improve mobility, and enhance overall quality of life while preserving as much of the natural knee as possible. Compared to a total knee replacement, this procedure involves a smaller incision, less bone removal, and a quicker recovery time, making it an appealing option for suitable candidates.
Benefits of partial knee replacement
Partial knee replacement surgery offers numerous benefits that make it an attractive option for many patients. One of the most significant advantages is the reduced recovery time. Partial knee replacement patients typically experience less postoperative pain and swelling, which leads to easier and faster rehabilitation compared to those undergoing total knee replacement.
The procedure is also less invasive, involving a smaller incision and causing less tissue damage. This minimally invasive approach helps preserve more of the natural knee joint, contributing to improved mobility and a more natural range of motion post-surgery.
Another key benefit is the reduced risk of complications. By only replacing the damaged portion of the knee joint, the likelihood of issues such as infection, blood clots, and nerve damage is minimized. Additionally, partial knee replacement surgery is often more cost-effective than total knee replacement, making it a financially viable option for many patients.
Overall, partial knee replacement can significantly improve pain and function for individuals with osteoarthritis affecting a single compartment of the knee, offering a similar level of relief as total knee replacement but with added benefits.
Anatomy of the knee and candidates for surgery
The knee is a complex joint formed by the femur (thigh bone), tibia (shin bone), and patella (kneecap). Healthy cartilage covers these bones, enabling smooth motion and reducing friction during movement. Ligaments, tendons, and muscles provide stability and support to the knee joint.
Partial knee replacement is generally suitable for individuals with osteoarthritis or localised knee damage that affects only one compartment of the knee. Arthritis often affects the medial compartment of the knee. Candidates often include those who:
- Experience knee pain confined to one area of the knee.
- Have good overall knee stability with intact ligaments.
- Maintain a satisfactory range of motion in the knee.
- Have not responded to other treatments, such as physical therapy, medications, or injections.
Partial knee replacement is often recommended when other treatments fail to provide relief from symptoms caused by conditions such as:
- Osteoarthritis localized to one compartment, including the medial or lateral compartment.
- Avascular necrosis (bone tissue death) affecting a specific area.
- Post-traumatic arthritis resulting from injury to part of the knee joint.
Accurate diagnosis and targeted interventions can help manage or alleviate knee pain.
At OSD Healthcare, we offer partial knee replacement as a day case procedure, allowing you to recover comfortably at home soon after surgery.
Hospital fee guide price: £9,405
*Additional consultant fee not included
Before surgery
Before surgery, you will meet with one of our orthopaedic surgeons to discuss your symptoms and medical history. A thorough examination will be conducted, which may include X-rays, MRI, or other imaging studies to confirm that only one compartment of the knee is affected. This evaluation ensures that you are a good candidate for partial knee replacement.
Pre-surgical preparation may include:
- Stopping certain medications, such as blood thinners, before surgery.
- Completing blood tests, imaging studies, and other pre-operative evaluations to ensure your fitness for surgery.
- Discussing anaesthesia options and any questions or concerns you may have with your care team.
Our team will provide you with detailed instructions on how to prepare for your surgery and recovery.
During surgery
During partial knee replacement surgery, you will typically receive general anaesthesia or a regional block to ensure you are comfortable and pain-free. The surgeon will make a smaller incision compared to total knee replacement, providing access to the affected compartment of the knee.
A specific type of knee surgery, patellofemoral knee replacement, targets the patellofemoral joint, focusing on the damaged patella and trochlea.
The procedure involves:
- Preparing the Joint: Damaged cartilage and bone in the affected compartment are removed while preserving the healthy cartilage, bone, and surrounding structures.
- Inserting the Prosthesis: A metal implant replaces the damaged bone on the femur and tibia, and a plastic spacer is inserted between them to ensure smooth movement.
- Alignment Check: The surgeon ensures the prosthesis fits properly, restoring alignment and function to the joint.
- Closing the Incision: The wound is closed with stitches or staples, and a sterile dressing is applied.
The entire procedure usually takes 1-2 hours, depending on the complexity.
Risks and Complications
As with any surgical procedure, partial knee replacement surgery carries some risks and potential complications. One of the primary concerns is the risk of infection, which can occur at the surgical site. While rare, infections can be serious and may require additional treatment.
Over time, the implant used in the partial knee replacement can loosen, necessitating additional surgery. Additionally, the progression of arthritis in the unreplaced parts of the knee can lead to further degeneration, potentially requiring future surgical intervention.
While these risks are relatively uncommon, it is important for patients to be aware of them and discuss any concerns with their orthopaedic surgeon before undergoing partial knee replacement surgery.
After surgery
Recovery from partial knee replacement is generally faster than total knee replacement. You will be encouraged to start moving the joint on the same day as surgery. Physical therapy begins immediately to restore range of motion and strengthen the muscles supporting the knee. In comparison, recovery from total knee arthroplasty can be more extensive, often requiring a longer rehabilitation period and more intensive physical therapy.
Key aspects of recovery include:
- Pain Management: Medications and icing will help manage pain and reduce swelling.
- Physical Therapy: Rehabilitation focuses on exercises to regain flexibility, improve strength, and restore normal knee function.
- Walking and Weight Bearing: Most patients can bear weight on the knee sooner than with a total knee replacement, using crutches or a walker as needed.
You’ll be discharged the same day in most cases, with instructions on wound care, activity restrictions, and follow-up appointments.
Long-Term Recovery and Lifestyle
Most patients experience significant pain relief and improved mobility within weeks. Activities like walking, climbing stairs, and driving are typically resumed in 4-6 weeks, but full recovery may take several months. Follow-up appointments will monitor your progress and ensure the prosthesis is functioning well.
Knee replacements, including partial knee replacements, offer several advantages, such as quicker recovery, more natural knee movement, and less post-surgical discomfort. However, some patients may require additional surgery in the future if arthritis progresses to other compartments of the knee.
Maintaining a healthy weight, staying active with low-impact exercises, and following your orthopaedic surgeon’s advice are essential for long-term success and preserving the life of your partial knee replacement.
Appointment and Treatment Plan
Appointment
Based on your previous consultation with a doctor, an appointment will be arranged between you and your surgeon.
Treatment plan
During this appointment, you’ll go through your medical history, the surgery, the recovery, and together, you’ll decide whether this is a viable option for you.
Pre-op assessment
If surgery is an option, then the surgeon and their team will thoroughly assess whether you’re right for the surgery. They’ll consider your current health, any previous issues, and other external matters.
Surgery
Prior to going through the surgery, our team will ensure that you’re prepped once again. If everything is confirmed, you’ll undergo the surgery and then we’ll explain the aftercare instructions.
Aftercare
If necessary, you’ll stay in a ward for a few hours to ensure that you’re ready to go home after the surgery. However, this may depend on the surgery outcome and whether you need moderate or light assistance.
Follow-Up
You’ll come in a few weeks later and we’ll give you one final check-over to ensure that you’re on track for recovery.
Experts
We are proud to provide patients with access to a wide range of clinicians, chosen specifically for their knowledge and reputation in their area of expertise. Our experts align with our values: putting you at the centre of your care and educating you on your options at each step of the journey. We encourage you to learn more about our clinicians and how they can help you below. As always, please contact our patient services team if you require any additional information.
We offer 3 ways to pay for your treatment
We exist to take the stress out of private healthcare.
Our payment options are designed to offer you easy access to our treatments and services. You can choose to pay on the day, spread the cost, or use your private medical insurance.
Our patient services team will guide you through the process, providing clear costs and support throughout your course of treatment so you can focus on the thing that matters most – your health.
Whether you pay in advance, spread the cost, or use your private medical insurance, rest assured you will be receiving exceptional care 365 days a year.
Pay in Advance
Even if you do not have medical insurance, you can still get quick and comprehensive access to private medical care.
We provide transparent pricing from your initial consultation to the completion of your treatment so you know where your stand, every step of the way.
We accept all major debit and credit cards, as well as Apple Pay for UK residents. Please note that we do not accept cash or cheques.
Pay monthly
Paying for your treatment at OSD Healthcare doesn’t need to mean settling the full cost in one go.
Many of our treatments have a pay monthly option that allows you to spread the cost of your treatment over 12 months with no credit checks required.
A minimum spend of £300 does apply. We’ll take your first payment upfront and then arrange a direct debit for your monthly payments thereafter. It’s that simple.
Pay using PMI
We are recognised by all major health insurance companies and with our extensive range of services, there are lots of benefits to using your insurance with us. Our patient services team is here to answer any questions you may have about using your private health insurance with us.
Please bring along your policy details including your scheme details, membership or policy number, expiry date and confirmation of eligibility to claim (i.e. your authorisation number). If you do not have these details with you, we will require payment from you on the day. Patients are liable for any amounts not settled by their insurer.
Hospital fee guide price: £9,405
*Additional consultant fee not included