Patent ID: 8628579

Claim:
A knee replacement system comprising: a femoral knee implant comprising a pair of condyles and a bone facing side shaped to lie against a resected surface of a femur; and a tibial baseplate comprising a tibia facing surface and a superior surface, wherein the tibia facing surface is shaped to lie against a resected surface of a tibia; a tibial bearing having a baseplate facing side, a condylar articulation side, and a channel which passes through the tibial bearing along a direction generally perpendicular to the baseplate facing side; a support post assembly comprising a post which projects superiorly relative to the superior surface of the tibial baseplate and extends through the channel of the tibial bearing; a sleeve mounted over the post and rotatable about the post; a first rotation axis extending through the tibial baseplate and the tibial bearing substantially perpendicular to the superior surface of the tibial baseplate and the baseplate facing side of the tibial bearing, the first rotation axis medially displaced relative to the geometric centers of the tibial baseplate and the tibial bearing, wherein the tibial bearing rotates relative to the tibial baseplate about the medial first rotation axis during articulation of the knee replacement system; and a second rotation axis separate from and not co-axial with the first rotation axis, wherein the sleeve rotates about the second rotation axis.