Ceramic acetabular shell liner with a metal ring having a lead-in surface
AssigneeDepuy Ireland Unlimited Company
InventorsLewis Butler, Andrew W. Donn
Life of this patent
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Abstract
An acetabular prosthesis for use in a hip arthroplasty surgical procedure is disclosed. The acetabular prosthesis includes an acetabular liner assembly to be secured to an acetabular shell component. The acetabular liner assembly includes a ceramic acetabular shell liner component. The acetabular liner assembly also includes a metal ring affixed to and encircling the ceramic acetabular shell liner component. The metal ring includes a proximal rim shaped to define a lead-in surface.
Claims15
An acetabular prosthesis for use in a hip arthroplasty surgical procedure, the acetabular prosthesis comprising:
- an acetabular liner assembly to be secured to an acetabular shell component, the acetabular liner assembly comprising:
- a ceramic acetabular shell liner component including an outer surface having a curvature;
- and
- a metal ring affixed to and encircling the ceramic acetabular shell liner component, wherein the metal ring comprises a distal rim, a proximal rim, and an outer wall that extends from the distal rim to the proximal rim, wherein the outer wall defines a diameter of the metal ring that increases as a function of a distance from the proximal rim, and wherein the proximal rim is shaped to define a lead-in surface that is rounded inwardly toward a longitudinal axis of the metal ring, wherein a curvature of the lead-in surface is non-congruent with the curvature of the outer surface of the ceramic acetabular shell liner component.
A modular acetabular prosthesis comprising:
- an acetabular shell component shaped to fit in a surgically prepared acetabulum of a patient;
- and
- an acetabular shell liner assembly comprising:
- a ceramic acetabular shell liner component including an outer surface having a curvature;
- and
- a metal ring affixed to the ceramic acetabular shell liner component, wherein the metal ring encircles an outer wall of the ceramic acetabular shell liner component and comprises a distal rim, a proximal rim, and an outer wall that extends from the distal rim to the proximal rim, wherein the outer wall defines a diameter of the metal ring that increases as a function of a distance from the proximal rim, and wherein the proximal rim includes a lead-in surface that is rounded inwardly toward a longitudinal axis of the metal ring, wherein a curvature of the lead-in surface is non-congruent with the curvature of the outer surface of the ceramic acetabular shell liner component.
A method for using a modular acetabular prosthesis in a hip arthroplasty surgical procedure, the method comprising:
- inserting an acetabular shell component into a surgically prepared acetabulum of a patient;
- and
- inserting, into the acetabular shell component, an acetabular shell liner assembly that includes a ceramic acetabular shell liner component having a metal ring affixed to an outer wall of the acetabular shell liner component, wherein the metal ring comprises a distal rim, a proximal rim, and an outer wall that extends from the distal rim to the proximal rim, wherein the outer wall defines a diameter of the metal ring that increases as a function of a distance from the proximal rim, and wherein the proximal rim is shaped to define a lead-in proximal surface that (i) is rounded inwardly toward a longitudinal axis of the metal ring and (ii) aligns the acetabular shell liner assembly with the acetabular shell as the acetabular shell liner assembly is inserted into the acetabular shell, and wherein a curvature of the lead-in proximal surface is non-congruent with a curvature of the outer surface of the ceramic acetabular shell liner component.
Dependencies are inferred from the claim text.