An artificial knee joint can be fixated in a variety of ways. In essence, there are two main types of fixation: cemented and cementless:
If the bone structure lacks stability, the knee joint replacement is fixated using bone cement. This creates a strong bond between the knee endoprosthesis and the bone immediately after the surgery.
If the bone quality is good, the artificial knee joint can be fixated without using cement. In this case, the bone slowly grows into the knee endoprosthesis and it takes some time to create a strong connection.
The correct choice of procedure not only depends on the age and physical activity of the patient, but also on the condition of the bone. The surgeon decides on the appropriate method with the patient during a preoperative consultation.
With this method, the artificial femoral and tibial components are bonded to the bone using bone cement. Bone cement is always used when the back of the kneecap is replaced.
In contrast to cemented fixation, with cementless fixation the artificial femoral and tibial components are wedged into the bone. This means that the rough metallic surfaces of the prosthetic components come into direct contact with the bone, which then gradually grows in.
Hybrid prosthesis combines cemented with cementless fixation: the femoral component is placed without cement and the tibial component is cemented.
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