Rate of complications and short-term Functional Results of Revision Total Knee Arthroplasty for Tibio-femoral Instability: do stability and range of motion are restored in 62 revisions.

Background: Tibio-femoral instability (TFI) due to ligament imbalance is a growing cause of revision total knee arthroplasty (TKA). The results are heterogeneous in the event of revision and literature is scarce regarding this issue particularly when use of hinge prostheses is not exclusive to manage this complication. Therefore, a retrospective investigation was conducted aiming to (1) analyze the one-year functional results, (2) determine the rate of complications after revision for TFI using posterior-stabilized or condylar constrained knees (CCK), 3) identify the factors that could influence the function outcome.