Ceramic acetabular shell liners with augments

Patent metadata

Field	Value
Publication number	US-11291549-B2
Application number	US-201916710641-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Dec 11, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

An acetabular prosthesis for use in a hip arthroplasty surgical procedure is disclosed. The acetabular prosthesis includes a ceramic acetabular shell liner component configured to be secured to an acetabular shell component. The acetabular prosthesis also includes a metal ring affixed to and encircling the ceramic acetabular shell liner component. The acetabular prosthesis also includes an augment molded to and distally extending from the metal ring. The augment is shaped to modify a range of motion of a femoral prosthetic component when the femoral prosthetic component is fitted into the ceramic acetabular shell liner component. Other embodiments are also disclosed.

First claim

The invention claimed is:

1. An acetabular prosthesis for use in a hip arthroplasty surgical procedure, the acetabular prosthesis comprising:
a ceramic acetabular shell liner component configured to be secured to an acetabular shell component;
a metal ring affixed to and encircling the ceramic acetabular shell liner component, wherein the metal ring includes a distal rim and a set of keys and wherein each key of the set of keys extends distally away from the distal rim and curves outwardly from the distal rim; and
an augment molded over the set of keys and distally extending from the metal ring, wherein the augment is shaped to modify a range of motion of a femoral prosthetic component when the femoral prosthetic component is fitted into the ceramic acetabular shell liner component.

2. The acetabular prosthesis of claim 1 , wherein the ceramic acetabular shell liner component is semi-hemispherical in shape and the augment causes the acetabular prosthesis to be over-hemispherical in shape.

3. The acetabular prosthesis of claim 1 , wherein the ceramic acetabular shell liner component comprises an outer wall that is shaped to define a channel around a perimeter of the outer wall and the metal ring is secured within the channel.

4. The acetabular prosthesis of claim 3 , wherein the metal ring comprises titanium.

5. The acetabular prosthesis of claim 3 , wherein the metal ring is at least partially coated with a polymeric material.

6. The acetabular prosthesis of claim 3 , wherein each key of the set of keys is formed from a polymeric material.

7. The acetabular prosthesis of claim 1 , wherein the augment comprises a polymeric material.

8. An acetabular prosthesis for use in a hip arthroplasty surgical procedure, the acetabular prosthesis comprising:
a ceramic acetabular shell liner component configured to be secured to an acetabular shell component;
a metal ring affixed to and encircling the ceramic acetabular shell liner component, wherein the metal ring includes a distal rim and a set of keys that extend from the distal rim; and
an augment molded over the set of keys and distally extending from the metal ring, wherein the augment is shaped to modify a range of motion of a femoral prosthetic component when the femoral prosthetic component is fitted into the ceramic acetabular shell liner component.

9. The acetabular prosthesis of claim 8 , wherein the ceramic acetabular shell liner component is semi-hemispherical in shape and the augment causes the acetabular prosthesis to be over-hemispherical in shape.

10. The acetabular prosthesis of claim 8 , wherein the ceramic acetabular shell liner component comprises an outer wall that is shaped to define a channel around a perimeter of the outer wall and the metal ring is secured within the channel.

11. The acetabular prosthesis of claim 8 , wherein the metal ring comprises titanium.

12. The acetabular prosthesis of claim 8 , wherein the metal ring is at least partially coated with a polymeric material.

13. The acetabular prosthesis of claim 8 , wherein the augment comprises a polymeric material.

14. An acetabular prosthesis for use in a hip arthroplasty surgical procedure, the acetabular prosthesis comprising:
a ceramic acetabular shell liner component configured to be secured to an acetabular shell component;
a metal ring affixed to and encircling the ceramic acetabular shell liner component, wherein the metal ring includes a distal rim and a set of keys that extend away from the distal rim; and
an augment molded over the set of keys of the metal ring, wherein the augment extends radially from a distal rim of the metal ring and is shaped to modify a range of motion of a femoral prosthetic component when the femoral prosthetic component is fitted into the ceramic acetabular shell liner component.

15. The acetabular prosthesis of claim 14 , wherein the ceramic acetabular shell liner component is semi-hemispherical in shape and the augment causes the acetabular prosthesis to be over-hemispherical in shape.

16. The acetabular prosthesis of claim 14 , wherein the ceramic acetabular shell liner component comprises an outer wall that is shaped to define a channel around a perimeter of the outer wall and the metal ring is secured within the channel.

17. The acetabular prosthesis of claim 14 , wherein the metal ring comprises titanium.

18. The acetabular prosthesis of claim 14 , wherein the metal ring is at least partially coated with a polymeric material.

19. The acetabular prosthesis of claim 14 , wherein each key of the set of keys is formed from a polymeric material.

20. The acetabular prosthesis of claim 14 , wherein the augment comprises a polymeric material.

Assignees

• Depuy Ireland Ultd Co

Inventors

• Butler Lewis
• Flatters Ian J
• Donn Andrew W
• Brandewie Alena M

Classifications

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2002/30494

  Cooperating protrusions and recesses, e.g. radial serrations, located on abutting end surfaces of a longitudinal connection · CPC title

• A61F2002/30736

  Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect · CPC title

• A61F2/34 Primary

  Acetabular cups · CPC title

• A61F2310/00179

  Ceramics or ceramic-like structures · CPC title