A knee revision (also called "revision total knee replacement") is a reoperation of a total knee replacement (TKR). This reoperation may involve a partial or a complete exchange of the prostheses that were implanted during the original TKR surgery. Some patients may only need to have their existing implants and underlying bone surfaces cleaned out and refixated, rather than replaced.
In about 85% to 90% of people who get a TKR, the artificial implants last for 15 to 20 years. This means that for elderly people, they may last for life. But in younger patients, especially those who maintain an active lifestyle, TKR prostheses may eventually fail, requiring another replacement later in life.
The most common reasons for knee revision are:
Video: A step-by-step animation of a knee revision procedure