Conventional knee replacement surgery uses ready-made implants. The disadvantage of this is that surgeons have to compromise on the precise fit and sizing of the implant, choosing the one that most closely matches your bone structure. If an implant does not fit perfectly, it can lead to long-term pain and restricted mobility. One in five people who receive an off the shelf implant are not fully satisfied with the results of surgery.
Customised (iTotal Conformis) knee implants are individually designed for your knee, providing a perfect, customised fit that mimics the natural shape of your knee
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Benefits
An implant that is sized and shaped to your precise measurements allows more natural, pain-free movement of the joint. Patients experience less pain after surgery and there is less wear and tear on the implant, meaning that it may last longer. More of the patient’s own healthy bone and ligaments can be preserved and, over time, it is hoped that individuals who have a customised knee replacement experience more stability and more function in the knee.
How it works
A CT scan and x-rays are taken prior to surgery, which provides information about the tissues, bones and structure of the knee. A specialist computer programme then creates a personalised three-dimensional image of your knee and virtually corrects the damaged areas. From this, a customised implant is designed that is specific to the anatomy of the patient and precisely sized to sit perfectly within the joint.
Knee replacement is carried out under general anaesthetic. The surgeon makes an incision in the knee and cuts the bone in a highly specific location based on the computer-generated image. The exact placement of these cuts helps ensure that the knee is completely aligned and stabile, with an ability to rotate normally.
A trial implant may be placed within the joint to test the fit, placement and alignment of the device before the custom-fit implant is inserted and fixed in place with cement. The surgeon will then close the incision.
Risk factors
While custom knee implants generally provide an effective and long-lasting relief from pain, like any surgery there are risks. These include:
- Infection of the wound or joint replacement
- Ligament or nerve damage
- Blood clots or deep vein thrombosis
- Ongoing pain in the knee
- Bleeding in the knee joint
- Fracture of surrounding bones
- Risks from anaesthetic
What does a customised knee replacement treat?
Custom knee replacement surgery is suitable for people who have severe knee pain that limits their everyday activities. Custom implants are particularly suitable for patients who have a non-standard body shape or size, such as people who are very large or small or younger patients.
Who it helps
You are likely to offered knee replacement surgery only if other treatments such as physiotherapy or steroid injections have ceased to be effective. Although custom knee replacement generally produces more successful outcomes than conventional knee surgery both are major procedures that will normally only be offered if:
- you have severe pain and your mobility is significantly impacted
- your quality of life is being adversely affected and you are struggling with everyday tasks
- your work or home life is suffering as a result of your knee problems
- the pain is causing low mood or depression
FAQ’s
Why are custom implants better than normal implants?
They are individually designed for you based on your personal anatomy. Because they are custom fitted to you, the surgeon doesn’t have to compromise on fit. This means there is less likelihood of pain after surgery. More of your healthy bone and ligament can be preserved which means you have more treatment options in the future. Custom implants are designed to mimic the natural shape of your knee for improved movement and function.
How long will it be before I can get back to normal?
Recovery varies from one person to another. On average most people return to their normal day to day activities within six weeks. More physical activities like sport can take up to three months.
How long does the operation take?
Total knee replacement is a standard procedure. It takes between 60 and 90 minutes.
Personal outcomes – what to expect
Each year, knee replacements enable thousands of patients to enjoy an active life, free of chronic knee pain.
Our patient-care process
- Once all of your diagnostic procedures are completed, we will be able to explain whether surgery is recommended.
- We will go through the procedures with you, covering the operation itself, the recovery process and the future prospects.
- Your orthopaedic surgeon will also explain the risks: these are small, but it is important for you to understand them.
- You can feel reassured that you will receive expert care from the start of the process, including your after-care.
Other useful information
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If you are experiencing pain in your pelvis, hip, knee or ankle, or are suffering from a sports injury, seek specialist help to get you back to living your life. Contact can be made direct, or through your GP.
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