Tibial augments for use with knee joint prostheses

A tibial augment system for a knee joint including a tibia, the system configured to articulate in conjunction with a condyle portion of a femoral component, the system comprising:

• a tibial implant comprising a tibial plate and a tibial stem component extending from said tibial plate;
• and
• a tibial augment implantable in the tibia and comprising an annular body formed with a porous metal material, said porous metal material providing a porous exterior surface to said tibial augment for facilitating bony ingrowth into said porous exterior surface when said tibial augment is implanted in the tibia, said annular body including an interior wall and an exterior wall with a thickness of the annular body extending between said interior wall and said exterior wall such that said porous metal material spans the entirety of said thickness, said annular body being tapered between a proximal end and a distal end of the annular body, said annular body having an anterior/posterior dimension and a medial/lateral dimension, the medial/lateral dimension ranging from about 40 mm to about 80 mm at a proximal end of the annular body, said interior wall of said annular body providing a passageway that extends entirely through the annular body for accepting said tibial stem component when said annular body is positioned about said tibial stem component.

A tibial augment system for a knee joint including a tibia, the system configured to articulate in conjunction with a condyle portion of a femoral component, the system comprising:

• a tibial implant comprising a tibial plate and a tibial stem component extending from said tibial plate;
• and
• a tibial augment implantable in the tibia and comprising an annular body formed with a porous metal material, said porous metal material providing a porous exterior surface to said tibial augment for facilitating bony ingrowth into said porous exterior surface when said tibial augment is implanted in the tibia, said annular body including an interior wall and an exterior wall with a thickness of the annular body extending between said interior wall and said exterior wall such that said porous metal material spans the entirety of said thickness, said annular body being tapered between a proximal end and a distal end of the annular body, said annular body having an anterior/posterior dimension and a medial/lateral dimension, the anterior/posterior dimension ranging from about 30 mm to about 40 mm at a proximal end of the annular body, said interior wall of said annular body providing a passageway that extends entirely through the annular body for accepting said tibial stem component when said annular body is positioned about said tibial stem component.

A tibial augment system for a knee joint including a tibia, the system configured to articulate in conjunction with a condyle portion of a femoral component, the system comprising:

• a tibial implant comprising a tibial plate and a tibial stem component extending from said tibial plate;
• and
• a tibial augment implantable in the tibia and comprising an annular body formed with a porous metal material, said porous metal material providing a porous exterior surface to said tibial augment for facilitating bony ingrowth into said porous exterior surface when said tibial augment is implanted in the tibia, said annular body including an interior wall and an exterior wall with a thickness of the annular body extending between said interior wall and said exterior wall such that said porous metal material spans the entirety of said thickness, said annular body having an anterior/posterior dimension and a media/lateral dimension, said interior wall of said annular body providing a passageway that extends entirely through the annular body for accepting said tibial stem component when said annular body is positioned about said tibial stem component, with an outer posterior surface of the exterior wall having a distal taper along at least a portion of a height between a proximal face and a distal face of the annular body, the distal taper being less than approximately 17 degrees.