Hip & Knee Revision
During hip or knee replacement surgery, the joint is replaced with a prosthesis (implant) made of metal, plastic, and/or ceramic components. While the majority of total hip or knee replacements are successful, they may not be permanent, as problems can develop over the long-term.
Although a prosthesis is either cemented into position during the initial joint replacement surgery or implanted in such a way that the bone is expected to grow into the surface of the prosthesis, it may loosen from the underlying bone and cause pain due to any number of factors.
Reasons for Hip or Knee Revision
- High-impact activity
- Excessive body weight
- Wear of the plastic spacer between the two metal components of the implant
- Osteolysis, a condition in which the bone surrounding the prosthesis deteriorates, making the implant lose or unstable
In addition to an implant becoming loose, other circumstances that may warrant a hip or knee revision include infection within the artificial joint, recurrent dislocation within the hip or ligament instability within the knee, or a fractured bone around the implant.