Total ankle replacement with variable constraint articulating surfaces
AssigneeEnovis Corporation
InventorsSamuel Fang, Matthew David Schultz, Hannah Fatemi
Life of this patent
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Abstract
A total ankle replacement implant with a variable constraint bearing surface is provided. The variable constraint bearing surface may have regions of high constraint to provide the total ankle replacement with stability when stationary and regions of low constraint to improve the range of motion and internal-external rotation of the total ankle replacement implant to improve kinematics during flexion and extension.
Claims20
A talar component for a total ankle replacement implant comprising:
- a bearing surface comprising a high constraint region and a low constraint region,
- wherein the high constraint region and the low constraint region of the bearing surface define a range of motion for the total ankle replacement implant.
A total ankle replacement implant comprising:
- an articulation component comprising an articulation surface;
- and
- a talar component comprising a bearing surface;
- wherein the bearing surface comprises a high constraint region and a low constraint region defining a range of motion of the talar component relative to the articulation component.
A bearing surface of a talar component for a total ankle replacement implant, the bearing surface comprising a high constraint region defining a first radius and a low constraint region defining a second radius, wherein the first radius is a distance between the bearing surface and an opposed bottom surface of the talar component at a maximum height of the bearing surface, and wherein the second radius is a distance between the bearing surface and the opposed bottom surface of the talar component at a minimum height of the bearing surface.
The bearing surface of 18, wherein the first radius is greater than the second radius.
Dependencies are inferred from the claim text.