Knee prosthesis
AssigneeBiomet Manufacturing, LLC
InventorsRobert Metzger, James G. Lancaster
Life of this patent
Estimating the term…
Abstract
A knee joint prosthesis assembly including a femoral component and a unitary tibial component. The femoral component includes a first condyle and a second condyle. The unitary tibial component includes an engaging structure configured to rigidly secure a stationary bearing thereto. The stationary bearing is configured to articulate with the first condyle. The unitary tibial component further includes a planar tibial bearing surface configured to slidably support a mobile bearing thereon. The mobile bearing includes an inferior planar surface configured to slide along the planar tibial bearing surface and a superior surface configured to articulate with the second condyle.
Claims20
A knee joint prosthesis assembly comprising:
- a femoral component including a first condyle and a second condyle;
- and
- a unitary tibial component including:
- an engaging structure configured to rigidly secure a stationary bearing thereto, the stationary bearing configured to articulate with the first condyle;
- and
- a planar tibial bearing surface configured to slidably support a mobile bearing thereon, the mobile bearing including an inferior planar surface configured to slide along the planar tibial bearing surface and a superior surface configured to articulate with the second condyle.
A knee joint prosthesis assembly comprising:
- a femoral component including a first condyle and a second condyle connected by a patellar track portion, the femoral component defining an opening between the first condyle and the second condyle;
- and
- a unitary tibial component including:
- an engaging structure configured to rigidly secure a stationary bearing thereto, the stationary bearing configured to articulate with the first condyle;
- a planar tibial bearing surface configured to slidably support a mobile bearing thereon, the mobile bearing including an inferior planar surface configured to slide along the planar tibial bearing surface and a superior surface configured to articulate with the second condyle;
- and
- a rail extending in an anterior-posterior direction and configured to restrict the mobile bearing to anterior-posterior movement.
A knee joint prosthesis assembly comprising:
- a femoral component including a first condyle and a second condyle connected by a patellar track portion, the femoral component defining an opening between the first condyle and the second condyle;
- and
- a unitary tibial component including:
- a medial portion, a lateral portion, and a slot defined between the medial portion and the lateral portion;
- an engaging structure extending superiorly from one of the medial portion or the lateral portion, the engaging structure configured to rigidly secure a stationary bearing thereto, the stationary bearing configured to articulate with the first condyle;
- a planar tibial bearing surface at the other of the medial portion or the lateral portion, the planar tibial bearing surface configured to slidably support a mobile bearing thereon, the mobile bearing including an inferior planar surface configured to slide along the planar tibial bearing surface and a superior surface configured to articulate with the second condyle;
- and
- a rail between the planar tibial bearing surface and the engaging structure, the rail extending in an anterior-posterior direction and configured to restrict the mobile bearing to anterior-posterior movement.
Dependencies are inferred from the claim text.