Prosthesis system including tibial bearing component
First Claim
1. A tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure, the tibial bearing component comprising:
- a distal surface; and
an articular surface opposing the distal surface, the articular surface including a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively;
the lateral compartment having a lateral articular track with a lateral anterior-posterior extent, the lateral articular track comprising a plurality of distal-most points along a proximal surface of the lateral compartment that are contacted by the lateral condyle during rollback of the femoral component;
the medial compartment differing in configuration from the lateral compartment and having an anterior lip height as measured from a distal-most point of the articular surface to a proximal-most point of the medial compartment of between 9 mm and 13 mm, wherein the medial compartment is configured relative to the medial condyle to have between 31% and 63% of an overall surface area thereof contacted by the medial condyle of the femoral component with the femoral component in 0°
flexion.
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Accused Products
Abstract
According to one example, a tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure is disclosed. The tibial bearing component can include a distal surface and an articular surface opposing the distal surface. The articular surface can include a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively. The lateral compartment can have a lateral articular track with a lateral anterior-posterior extent. The lateral articular track can comprise a plurality of distal-most points along a proximal surface of the lateral compartment that are contacted by the lateral condyle during rollback of the femoral component. The medial compartment can differ in configuration from the lateral compartment and can have an anterior lip height of between about 9 mm and about 13 mm.
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Citations
18 Claims
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1. A tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure, the tibial bearing component comprising:
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a distal surface; and an articular surface opposing the distal surface, the articular surface including a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively; the lateral compartment having a lateral articular track with a lateral anterior-posterior extent, the lateral articular track comprising a plurality of distal-most points along a proximal surface of the lateral compartment that are contacted by the lateral condyle during rollback of the femoral component; the medial compartment differing in configuration from the lateral compartment and having an anterior lip height as measured from a distal-most point of the articular surface to a proximal-most point of the medial compartment of between 9 mm and 13 mm, wherein the medial compartment is configured relative to the medial condyle to have between 31% and 63% of an overall surface area thereof contacted by the medial condyle of the femoral component with the femoral component in 0°
flexion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure, the tibial bearing component comprising:
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a distal surface; and an articular surface opposing the distal surface, the articular surface including a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively; the lateral compartment configured to have a lateral dwell point a distance between 65% and 69% of a total anterior-posterior extent of the tibial bearing component as measured from an anterior most point to a posterior most point of the tibial bearing component; wherein the medial femoral condyle undergoes 3 mm of anterior-posterior translation relative to 11 mm of anterior-posterior translation of the lateral femoral condyle from 0°
to 120°
degrees of flexion. - View Dependent Claims (9, 10, 11)
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12. A tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure, the tibial bearing component comprising:
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a distal surface; and an articular surface opposing the distal surface, the articular surface including a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively; wherein the medial compartment is configured relative to the medial condyle to have between 31% and 63% of an overall surface area thereof contacted by the medial condyle of the femoral component with the femoral component in 0°
flexion. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification