Knee prosthesis
AssigneeBiomet Manufacturing, LLC
InventorsRobert Metzger, James G. Lancaster
Life of this patent
Estimating the term…
Abstract
A knee joint prosthesis assembly can include a femoral component that has a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. A tibial component can have a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure. A medial bearing can have a third engagement structure formed thereon that selectively engages the first engagement structure. A lateral bearing separately formed and independent from the medial bearing can have a fourth engagement structure formed thereon that selectively engages the second engagement structure.
Claims17
A knee joint prosthesis assembly comprising:
- a femoral component having a medial and a lateral condyle portion connected by a patellar track portion, the femoral component forming an opening between the medial and lateral condyles;
- a unitary tibial component having a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure;
- a medial bearing having a third engagement structure formed thereon that selectively engages the first engagement structure;
- and
- a lateral bearing separately formed and independent from the medial bearing and having a fourth engagement structure formed thereon that selectively engages the second engagement structure;
- wherein one of the medial and lateral bearings is fixed relative to the tibial component and the other of the medial and lateral bearings is a mobile bearing component, wherein the mobile bearing component includes a fixed portion having the third or fourth engagement structure that is configured to statically engage the tibial component and a mobile bearing portion that is configured to slidably advance along the opposing surface of the tibial component.
A knee joint prosthesis assembly comprising:
- a femoral component having a medial and a lateral condyle portion connected by a patellar track portion, the femoral component forming an opening between the medial and lateral condyles;
- a unitary tibial component having a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure;
- a medial bearing having a third engagement structure formed thereon that selectively engages the first engagement structure;
- and
- a lateral bearing separately formed and independent from the medial bearing and having a fourth engagement structure formed thereon that selectively engages the second engagement structure;
- wherein one of the medial and lateral bearings is a mobile bearing component having a fixed bearing portion that defines a closed pocket and a mobile bearing portion disposed and confined for movement within the closed pocket, wherein the mobile bearing portion is configured to slidably advance along an opposing surface of the tibial component.
Dependencies are inferred from the claim text.