Knee replacement procedures are performed most successfully, and they last about 20 years in 85% – 90% of well-selected patients. While knee replacement surgery has a very high success rate, there are a small percentage of cases in which it fails. At that point a second procedure, known as a revision knee, will be recommended. Occasionally, an implanted prosthesis does not function as well as it was intended to. In this case, a revision knee with tibial tubercle osteotomy may be performed.
Revision knee with tibial tubercle osteotomy replaces worn artificial knee parts and damaged bone with new, specially-made metal and plastic components.
Depending on the reason for the failure of the first knee replacement and the length of time that has elapsed since, the surgical incision may be made at the same site or at a different location. Specialized tools are used to remove the existing implants. In some cases, the revision procedure replacing the components will be almost identical to the first. Others, however, require some reconstruction of the bone in the form of a bone graft or use of metal plates and screws to secure the implant. Once the materials are fixed and attached, the surgeon will suture up the incision.
After a revision knee surgery, the patient is restricted from performing certain activities for six to 12 weeks. The patient may require a brace for stability, or an assistive device such as crutches or a walker to limit weight bearing and promote mobility. Physical therapy is essential for two to three months to improve knee strength.