Acetabular orthopaedic prosthesis and method
AssigneeDepuy Ireland Unlimited Company
InventorsAlena M. Brandewie, Paul P. Lewis, James A. Caywood, Thomas P. Schmalzried
Life of this patent
Estimating the term…
Abstract
An orthopaedic components, prostheses, and methods for a hip arthroplasty are disclosed. The acetabular prosthetic component includes an outer rim and a cavity defined by an inner wall. The cavity is sized to receive a femoral head of a femoral prosthetic component. The inner wall includes a curved surface extending inwardly from the outer rim to an inner end, and a semi-spherical surface connected to the inner end of the curved surfac. The inner wall is shaped to resist dislocation of the femoral head component from the cavity and permit the femoral head component to articulate over a range of motion.
Claims20
An orthopaedic prosthetic component, comprising:
- an acetabular prosthetic component configured to be received in a prosthetic shell, the acetabular prosthetic component including an outer rim, an inner wall extending inwardly from the outer rim, and a cavity defined by the inner wall, the cavity being sized to receive a femoral head of a femoral prosthetic component,
- wherein the inner wall includes a cylindrical surface extending inwardly from the outer rim to an inner end, and a semi-spherical surface connected to the inner end of the cylindrical surface,
- wherein, when the acetabular prosthetic component is viewed in cross-section, the cylindrical surface extends a first distance from the outer rim to the inner end on an inferior side of the acetabular prosthetic component and the cylindrical surface extends a second distance from the outer rim to the inner end on a superior side of the acetabular prosthetic component, the second distance being less than the first distance, and
- wherein the outer rim includes an inferior rim section that is positioned in an imaginary plane such that a portion of the semi-spherical surface on the superior side extends through the imaginary plane.
An orthopaedic prosthesis, comprising:
- an acetabular shell component having a distal rim and a concave curved surface extending from the distal rim to define an inner cavity, the distal rim being positioned in an imaginary plane, and
- an insert component configured to be received in the inner cavity, the insert component including an outer rim, an inner wall extending inwardly from the outer rim, and a cavity that is defined by the inner wall and is sized to receive a femoral head of a femoral prosthetic component,
- wherein the inner wall includes a cylindrical surface and a semi-spherical surface, and
- wherein the semi-spherical surface extends through the imaginary plane to a superior edge that is positioned lateral of the imaginary plane.
An orthopaedic prosthesis, comprising:
- a femoral prosthetic component including an elongated stem and a femoral head secured to the elongated stem,
- an acetabular shell component having a distal rim and a concave curved surface extending from the distal rim to define an inner cavity, the distal rim being positioned in an imaginary plane, and
- an insert component configured to be received in the inner cavity, the insert component including an outer rim, an inner wall extending inwardly from the outer rim, and a cavity defined by the inner wall, the cavity being sized to receive the femoral head of the femoral prosthetic component,
- wherein the femoral head includes a geometric center that is positioned lateral of the imaginary plane of the shell component,
- wherein the inner wall includes a cylindrical surface extending inwardly from the outer rim to an inner end, and a semi-spherical surface connected to the inner end of the cylindrical surface, and
- wherein the semi-spherical surface extends through the imaginary plane to define a region shaped to resist dislocation of the femoral head from the cavity.
Dependencies are inferred from the claim text.