Methods and systems are provided for a hinge knee system. A hinge knee system may comprise a femoral component； an insert； a tibial tray configured to be coupled to the insert； a tibial bushing configured to be disposed between the tibial tray and the insert； a poly locking screw configured to secure the tibial tray to the insert； a hinge box configured to be disposed between the femoral component and the insert； one or more cross-pin bushings configured to be disposed within the hinge box； a cross-pin configured to secure the hinge box to the femoral component； a hinge post configured to couple the hinge box to the tibial tray； and a hinge post set screw configured to secure the hinge box to the hinge post.
