Prosthetic implant support structure

Patent metadata

Field	Value
Publication number	US-10806587-B2
Application number	US-201815978686-A
Country	US
Kind code	B2
Filing date	May 14, 2018
Priority date	Aug 27, 2001
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A prosthetic system that includes a prosthetic implant acrd a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining a channel between the pair of components.

First claim

What is claimed is:

1. An acetabular system implantable in an acetabular cavity in a patient, the acetabular system comprising:
an acetabular cup implant including an outer surface; and
a support component for occupying an area in the acetabular cavity, the support component formed separately from said acetabular cup implant for subsequent connection to said acetabular cup implant, said support component capable of being impacted, by itself, into the acetabular cavity for obtaining a press fit of the support component in the acetabular cavity prior to the support component being connected to the acetabular cup implant, said support component consisting essentially of a porous metal material that is a bone ingrowth-receptive material with a porous structure for encouraging bone ingrowth and attachment throughout the support component for restoring lost bone stock in the acetabular cavity in the area occupied by the support component when the support component is implanted in the acetabular cavity, said support component including a convex outer surface for facing an inner surface of the acetabular cavity and through which bone of the patient can grow into said support component when the support component is implanted in the acetabular cavity and including an inner surface for accommodating the outer surface of the acetabular cup implant.

2. The acetabular system of claim 1 , wherein the support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the support component being formed to have a shape approximating a quarter of a sphere.

3. The acetabular system of claim 1 , wherein the support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the support component being formed to have a partially-hemispherical shape.

4. The acetabular system of claim 1 , wherein the support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the support component being formed to have an established size and shape for implantation in the acetabular cavity, the established size and shape of the support component including an external geometry of the support component, and wherein the support component, despite consisting essentially of said porous metal material, is capable of being impacted, by itself, into the acetabular cavity for obtaining a press fit of said external geometry in the acetabular cavity.

5. The acetabular system of claim 1 , wherein the support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the support component being formed to have an external geometry that includes said convex outer surface, and wherein the support component, despite consisting essentially of the porous metal material, is capable of being impacted, by itself, into the acetabular cavity for obtaining a press fit of said convex outer surface in the acetabular cavity.

6. The acetabular system of claim 1 , wherein the support component is connected to the acetabular cup implant, the support component having an established size and shape after formation and prior to being connected to the acetabular cup implant, the established size and shape of the support component including the convex outer surface of the support component.

7. The acetabular system of claim 1 , further comprising an adhesive located between the inner surface of the support component and the outer surface of the acetabular cup implant for securing the support component to the acetabular cup implant.

8. The acetabular system of claim 1 , wherein the support component includes a fenestration that can be filled with a bone graft material and which extends fully through the support component from said convex outer surface to said inner surface.

9. The acetabular system of claim 1 , wherein the support component is formed with a metal alloy.

10. The acetabular system of claim 1 , wherein said support component s formed entirely with said porous metal material.

11. An acetabular system implantable in an acetabular cavity in a patient, the acetabular system comprising:
an acetabular cup implant including a convex outer surface; and
a porous support component for occupying an area in the acetabular cavity, the porous support component formed separately from said acetabular cup implant for subsequent connection to said acetabular cup implant, said porous support component capable of being impacted, by itself, into the acetabular cavity for obtaining a press fit of the porous support component in the acetabular cavity prior to the porous support component being connected to the acetabular cup implant, said porous support component consisting essentially of a porous metal material that is a bone ingrowth-receptive material with a porous structure for encouraging bone ingrowth and attachment throughout the porous support component for restoring lost bone stock in the acetabular cavity in the area occupied by the porous support component when the porous support component is implanted in the acetabular cavity, said porous support component including a convex outer surface for facing an inner surface of the acetabular cavity and through which bone of the patient can grow into said porous support component when the porous support component is implanted in the acetabular cavity and including a concave inner surface for accommodating the convex outer surface of the acetabular cup implant.

12. The acetabular system of claim 11 , wherein the porous support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the porous support component being formed to have an established size and shape for implantation in the acetabular cavity.

13. The acetabular system of claim 12 , wherein the established size and shape of the porous support component includes an external geometry of the porous support component that is implantable in the acetabular cavity, and wherein the porous support component, despite consisting essentially of said porous metal material, is capable of being impacted, by itself, into the acetabular cavity for obtaining a press fit of said external geometry in the acetabular cavity.

14. The acetabular system of claim 11 , wherein the porous support component is connected to the acetabular cup implant, the porous support component having an established size and shape after formation and prior to being connected to the acetabular cup implant, the established size and shape of the porous support component including the convex outer surface and the concave inner surface of the porous support component.

15. The acetabular system of claim 14 , wherein the porous support component is formed having a shape approximating a quarter of a sphere.

16. The acetabular system of claim 14 , wherein the porous support component is formed having a partially-hemispherical shape.

17. The acetabular system of claim 11 , wherein the porous support component being formed separately from the acetabular cup implant for subsequent connection to the acetabular cup implant includes the porous support component being formed to have an external geometry that includes said convex outer surface and said concave inner surface of the porous support component, and wherein the porous support component, despite consisting essentially of the porous metal material, is capable of being impacted, by itself, into the acetabular cavi

Assignees

• Zimmer Inc

Inventors

• Hanssen Arlen D
• Lewallen David

Classifications

• A61F2/30734 Primary

  Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect · CPC title

• A61F2002/2835

  Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material · CPC title

• A61F2310/00239

  containing zirconia or zirconium oxide ZrO2 · CPC title

• A61F2002/30354

  Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis · CPC title

• A61F2310/00017

  Iron- or Fe-based alloys, e.g. stainless steel · CPC title