Knee Replacement Surgery is a surgical procedure that involves replacing the worn articular surfaces of your knee with an artificial implant. The femoral surface is replaced by metal (an alloy with the predominance of Chromium and Cobalt). The tibial part and the patella are replaced by a type of plastic: polyethylene. 

An incision is made in the anterior part of the knee and a passage is made in the internal part of the knee most often to access the joint.


Who needs a Knee Replacement Surgery?

Knee Replacement Surgery (the fitting of a knee prosthesis) is offered to people who are often retired (the elderly) but sometimes to people in a professional activity whose mobility of the knee joint is limited in flexion and extension movements and who present permanent pain and a limitation of the walking perimeter. In rare cases in young people as well, a prosthesis is placed in the event of significant joint destruction or polyarthritis.

These joint pathologies are manifested by various symptoms, in particular:

¨      pain

¨      phenomena of instability

¨      swelling

¨      joint stiffness


Osteoarthritis and Knee Replacement Surgery

 The knee is a load-bearing joint subject to significant daily mechanical stresses, repeated micro-traumas, and sports trauma (sprains). These "events" promote damage to the menisci and wear and tear on the joints. Osteoarthritis or arthrosis is a common knee disease (wear of the cartilage) that can be easily cured by a knee replacement surgery.

Osteoarthritis may only involve one or all three compartments of the knee. If the condition is advanced, the excessively worn knee joint is replaced by a prosthesis. Depending on the location and the extent of knee arthritis, this prosthesis can replace:

·         a single compartment

·         or the three knee compartments


These are implants that aim to replace the joint surfaces of the knee damaged in osteoarthritis. When the prosthesis replaces all the articular surfaces of the knee, it is called "total". When the prosthesis only replaces the damaged area and leaves the cartilage of the other compartments in place, it is called “uni-compartmental”.


Knee Replacement Surgery Recovery

Rehabilitation begins the same day and continues with a physiotherapist’s work. Full support is authorized the very afternoon of the operation, under cover of a pair of canes. Rehabilitation will be continued at home by a physiotherapist or in a rehabilitation center by a rehabilitation doctor. It aims to maintain the mobility of the knee and the periarticular muscles. Usually, the recovery times for a correct function are around the 3rd month and will be acquired between the 6th and 12th postoperative months.


The patient can move about a week after the knee replacement surgery using assistive devices such as canes and walkers. After one week (the second week after surgery), special exercises and physiotherapy are needed to further strengthen the range of motion of the knee joint and facilitate its function.

The best type of artificial prosthesis that has a long life is American prostheses. The life of these prostheses, as stated by the manufacturers; It is about 25 to 30 years old.

There is no specific age range for this surgery. If the extent and severity of the knee joint injury is so severe that joint function is impaired and we see joint destruction, joint replacement surgery is performed for the individual, regardless of age. It should be noted that the choice of functional prostheses should be made according to the patient's age to have a longer life.

In knee replacement surgery, the surface of the damaged cartilage is removed and replaced with an artificial surface. It is generally believed that the knee is generally replaced, but in fact an artificial prosthesis is placed on the bone. The material of this prosthesis is special and creates a soft surface for joint movement.

Knee replacement has very few side effects. This surgery has a very high success rate. However, about 2% of patients may have a surgical infection or other complication. Blood clots in the legs are one of the most common problems that can be prevented with medication. Light exercise after surgery also helps prevent blood clots.