Off-center liner for acetabular cup
AssigneeArthrology Consulting, LLC
InventorDerek Amanatullah
Life of this patent
Estimating the term…
Abstract
Off-center liners can be used with an acetabular cup in hip replacement or revision surgical procedures. The liners (of metal or plastic) can be laterally spaced from the acetabular cup, angled relative to the acetabular cup and/or have an opening that is offset relative to the axis of the acetabular cup. The liners have an orientation indicator that identifies where the liner should be impacted (e.g., impaction location or point) by the impactor to ensure the liner is impacted in a square manner relative to the acetabular cup.
Claims20
-20. (canceled)
A liner for an acetabular cup, comprising:
- a proximal surface, at least a portion of the proximal surface is configured to extend along a plane at an angle relative to an outer rim of the acetabular cup when the liner is seated in the acetabular cup;
- an outer convex surface configured to at least partially extend into an acetabular cup when the liner is seated in the acetabular cup;
- a concave bearing surface recessed relative to the proximal surface and configured to receive a head of a femoral stem;
- and
- one or more visual indicators on the liner that identify a location for applying an impaction force on the liner.
A liner and impactor system for an acetabular cup, comprising:
- a liner comprising:
- a proximal surface configured to extend along a plane at an angle relative to an outer rim of the acetabular cup when the liner is seated in the acetabular cup;
- an outer convex surface configured to at least partially extend into an acetabular cup when the liner is seated in the acetabular cup;
- a concave bearing surface recessed relative to the proximal surface and configured to receive a head of a femoral stem;
- and
- one or more visual indicators on the liner that identify a location for applying an impaction force on the liner;
- and
- an impactor having an impaction surface corresponding to one or both of the proximal surface and the concave bearing surface of the liner.
A method for implanting a liner in an acetabular cup, comprising:
- identifying a size of an acetabular cup for an acetabular hole;
- identifying a liner for use with the acetabular cup;
- inserting the acetabular cup in the acetabular hole;
- inserting the liner in the acetabular cup, the liner having a concave bearing surface and a proximal surface that extends along a plane at an angle relative to an outer rim of the acetabular cup when the liner is seated in the acetabular cup;
- and
- impacting the liner into place in the acetabular cup with an impactor square with the acetabular cup to seat the liner in the acetabular cup, the impactor having an impaction surface corresponding to one or both of the proximal surface and the concave bearing surface of the liner.
Dependencies are inferred from the claim text.