Hybrid Knee Prosthesis and Methods of Use

A method for revision total knee arthroplasty, comprising:

• removing a previously implanted tibial prosthesis from a proximal end of a tibia;
• resecting the proximal tibia so as to form a resected surface;
• inserting a cement plug into an intramedullary canal of the tibia;
• implanting a tibial void filling prosthesis into the intramedullary canal in a press-fit manner, the tibial void filling prosthesis having a channel extending entirely therethrough;
• injecting bone cement into the intramedullary canal between the cement plug and the resected surface while keeping the resected surface substantially free of the bone cement and so that the channel of the tibial void filling prosthesis is substantially filled with bone cement;
• pressurizing the bone cement while keeping the resected surface substantially free of bone cement;
• and
• implanting a tibial baseplate onto the proximal end of the tibia such that a porous bone facing surface thereof directly contacts the resected surface and a stem extending from the tibial baseplate is positioned within the pressurized bone cement and the channel of the tibial void filling prosthesis.

A total knee arthroplasty system, comprising:

• a joint prosthesis having a joint component and a stem extending from the joint component, the joint component having an articular side and a bone contact side, the articular side having first and second condyles, the bone contact side having a porous bone contact surface;
• a void filling prosthesis having a porous outer surface and a channel extending entirely through the void filling prosthesis and configured to receive the stem of the joint prosthesis;
• a cement plug;
• and
• a cement shield having a first member and a second member, the first member and the second member defining a channel extending through the cement shield and having a planar surface configured to abut a resected surface of a bone so that the channel aligns with an intramedullary canal of the bone.