Constrained knee joint prosthesis system and assembly
AssigneeZimmer, Inc.
InventorsCora Ruth M. Northrop, David L Glass, Tim Yoko
Life of this patent
Estimating the term…
Abstract
A prosthesis system for a constrained knee optionally including: a tibial bearing component configured to articulate with a femoral component; and a hinge post configured to couple with the femoral component and configured to be at least partially received by a well of the tibial bearing component. The hinge post includes one or more ramps and the tibial bearing component includes a riding feature configured to interact with the one or more ramps to rotate the hinge post during distraction of the hinge post from the tibial bearing component.
Claims20
A prosthesis system for a constrained knee comprising:
- a tibial bearing component configured to articulate with a femoral component;
- and
- a hinge post configured to couple with the femoral component and configured to be at least partially received by a well of the tibial bearing component;
- wherein the hinge post includes one or more ramps and the tibial bearing component includes a riding feature configured to interact with the one or more ramps to rotate the hinge post during distraction of the hinge post from the tibial bearing component.
A prosthesis assembly for a constrained knee comprising:
- a tibial bearing component configured to articulate with a femoral component;
- and
- a hinge post configured to couple with the femoral component and at least partially received by a well of the tibial bearing component when the hinge post is in a non-distracted position, wherein the hinge post includes one or more ramps formed by a distal side of a yoke portion of the hinge post, wherein the one or more ramps is configured to interact with the tibial bearing component to return the hinge post into the well from a distracted and rotated position.
A hinge post for a constrained knee comprising:
- a post;
- a yoke coupled to the post at a distal side thereof, the yoke having an aperture therethrough for receiving a pin that couples the hinge post to a femoral component;
- and
- at least a first ramp and a second ramp positioned at the distal side of the yoke adjacent the post, wherein the first ramp and the second ramp are angulated relative to the post and the aperture.
Dependencies are inferred from the claim text.