What is the knee joint?
The knee consists of three separate parts, the patella-femoral joint (knee cap joint), the medial (inner) and the lateral tibio-femoral (outer) joint. There are also several ligaments, which help stabilise the knee, including the medial and lateral collateral ligaments and the cruciate ligaments.
What happens in knee arthritis?
In knee arthritis the bearing surfaces (articular cartilage) between the parts of the knee wear out. This results in friction within the joint, with a loss of the normal gliding action between the parts of the knee. This can cause stiffness in the joint and pain. When the arthritis becomes severe the two ends of the bone rub against each other and can cause a ‘grating’ sensation.
What is a knee replacement?
A partial knee replacement is an artificial joint, which is made from a combination of metals and plastic. It is used to replace just the worn part of the joint, keeping the rest of your knee. It often allows a quicker recovery from surgery. As only part of the knee is artificial, it can mean the knee replacement feels more ‘normal’.
What conditions can it treat?
A partial knee replacement is predominantly used to treat moderate to severe arthritis affecting only one chamber of the knee.
What types of knee replacement are there?
There are different types of knee replacement depending on which part of the knee is affected. This includes medial compartment, lateral compartment and patella-femoral replacement joints.
What are the possible risks or complications?
Partial knee replacement surgery is a major procedure so it is important to discuss the risks as well as the benefits when you come to your appointment.
What happens before the operation?
Before you are scheduled for surgery you will be seen in the pre-operative assessment clinic. Here you will be seen by a nurse, who will ensure you are medically fit for the operation and arrange any necessary blood tests / investigations.
How is the surgery performed?
What happens after the operation?
Immediately after your surgery the aim is to reduce swelling, control pain and restore the movement back to the knee. Ice and strong painkillers are used to help achieve this. The physiotherapy team and nursing staff will look after you on the ward to help get you back up and mobile.