The knee prosthesis replaces the damaged cartilage with pieces of metal
(chrome, cobalt, titanium, etc.) of the same shape.
- One part is attached directly to the femur once the areas of damaged bone and cartilage are removed.
- One part is inserted in the tibia and reproduces the tibial plateau in its normal flat and horizontal shape.
- One polyethylene part is placed on top of the tibial implant in order to improve articular congruence (the state of two joint surfaces which slide over each other smoothly, without dislocating the joint), reduce friction and therefore wear and tear of the prosthesis.
- One polyethylene part is sealed onto the patella to ensure greater mobility.
Depending on the damage to the various parts of the knee, the surgeon may decide to conduct a total knee replacement or a partial replacement of the cartilage.