Various assemblies for replacing at least a proximal portion of a tibia
are provided. One assembly includes a tibial tray including a superior
bearing engaging surface and an inferior bone engaging surface and having
a truncated posterior region; a bearing including an articulating
surface, a tray mating surface, and an overhang. The tray mating surface
of the bearing is in mating engagement with the inferior bone engaging
surface of the tibial tray such that the overhang of the bearing extend
beyond the tibial tray truncated posterior region. Related surgical
methods are also provided.