A knee prosthesis is an artificial joint that is intended to take over the function of the knee joint. This is done in the event that functionality is no longer possible due to knee osteoarthritis or injuries and the associated pain and restrictions. A distinction is made between total and partial prostheses. The partial prosthesis is used if the corresponding gliding surfaces are still intact.

In order to ensure the functionality and durability of the knee prosthesis and thus increase the quality of life, rehabilitation should begin immediately after the operation and to maintain an active lifestyle that is gentle on the joints.