Stabilized knee prosthesis
First Claim
1. A knee prosthesis for implanting in a knee joint, comprising:
- a femoral component including a housing, the housing having a wall;
a tibial component; and
a coupling component movably interconnecting the femoral component to the tibial component, the coupling component including a first post and a second post at least partially positioned within the first post, the first post having an outer surface with a protrusion extending outwards from the outer surface, the protrusion being configured to engage the wall of the housing during hyperextension of a knee, wherein the housing includes an enclosed internal cavity adapted to receive a portion of the first post, wherein the first post includes a rounded end positioned within the housing of the femoral component.
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Accused Products
Abstract
A knee prosthesis includes a femoral component, a tibial component, and a coupling component interconnecting the femoral component and the tibial component. The tibial component includes ball. The femoral component is configured to move relative to the tibial component. The coupling component defines an internal cavity including a first spherical end portion and a second spherical end portion. The internal cavity is dimensioned to receive the ball of the tibial component. The ball is repositioned between the first spherical end portion and the second spherical end portion of the internal cavity upon movement of the femoral component relative to the tibial component.
92 Citations
20 Claims
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1. A knee prosthesis for implanting in a knee joint, comprising:
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a femoral component including a housing, the housing having a wall; a tibial component; and a coupling component movably interconnecting the femoral component to the tibial component, the coupling component including a first post and a second post at least partially positioned within the first post, the first post having an outer surface with a protrusion extending outwards from the outer surface, the protrusion being configured to engage the wall of the housing during hyperextension of a knee, wherein the housing includes an enclosed internal cavity adapted to receive a portion of the first post, wherein the first post includes a rounded end positioned within the housing of the femoral component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A knee prosthesis for implanting in a knee joint, comprising:
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a femoral component including a housing, the housing having a wall; a tibial component; and a coupling component movably interconnecting the femoral component to the tibial component, the coupling component including a post having an outer surface with a protrusion extending outwards from the outer surface, the protrusion configured to engage the wall of the housing during hyperextension of a knee, wherein the housing includes an enclosed internal cavity adapted to receive a portion of the post, wherein the post has a substantially spherical or hemispherical section and the housing includes a cavity adapted to receive the substantially spherical or hemispherical section and allow motion of the section within the cavity. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification