Primary Outcome Measures:
- Function and knee score of the knee society scoring at every 2 years until 10 years. [ Time Frame: 1-10 years post operative of revision ]
Follow up data of 1,2,4,6,8,and 10 years to evaluate bearing complications and clinical results for the use of MB in revision TKA. Retrospective clinical and radiographic evaluation of 197 mobile bearing revision TKA's will be collected. We will also analyze patient demographics and reason for revisions as well as implants used in revision.
Secondary Outcome Measures:
- Radiographic analysis by our orthopedic clinician to determine component failure or loosening. [ Time Frame: Post op - 1-10 years or revision surgery ]
Failure modes of revision total knee arthroplasty (TKA) that include prosthetic loosening and damage to constraining mechanisms often require revision TKA. Mobile bearing revision TKA components have been developed in hopes of lessening these failure mechanisms. Our purpose is to evaluate the use of mobile bearings in revision TKA.
Retrospective clinical and radiographic evaluation of 340 revision mobile bearing TKAs using the PFC Sigma and LCS posterior stabilized rotating platform implants (Depuy, Warsaw, IN) will be performed. Indications for revision include instability, loosening, arthrofibrosis, chronic hemarthrosis, failed patellofemoral replacement, failed unicompartmental knee replacement, infection reimplantation, and supracondylar fracture nonunion.