1. A knee prosthesis comprising: a tibial component for replacing at least a portion of a proximal end of a tibia, the tibial component having a tibial articular surface extending in an anteroposterior direction, the tibial articular surface having a central point and a posterior end, the tibial articular surface further including an articulation feature forming a posterior portion of the tibial articular surface between the central point and the posterior end, the articulation feature forming a projection that projects from a proximal face of the tibial articulation surface and that is contained within a portion of the tibial articulation surface selected from at least one of a lateral articular surface and a medial articular surface of an object selected from the tibial component and the tibia.