Prosthetic implant support structure

Patent metadata

Field	Value
Publication number	US-10646346-B2
Application number	US-201213619190-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Aug 27, 2001
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A prosthetic system that includes a prosthetic implant and a support structure secured to an inner surface of a cavity of a bone is disclosed. The support structure defines a channel that extends through the length of the support structure. The prosthetic implant is received in the channel, and a portion of the prosthetic implant is secured to an inner surface of the support structure by an adhesive. The support structure may comprise a pair of partially hemispherical components arranged in spaced apart relationship thereby defining the channel between the pair of components.

First claim

What is claimed is:

1. A prosthetic system implantable in a cavity in an end of a bone, the prosthetic system comprising:
a prosthetic implant including a stem component;
a hollow sleeve for occupying an area in a cavity in an end of a bone, the hollow sleeve securable to an inner surface of the cavity, said hollow sleeve including an axial channel that extends through the length of the hollow sleeve for accommodating said stem component, wherein said hollow sleeve is formed separately from said stem component for subsequent connection to said stem component, said hollow sleeve capable of being positioned, by itself, in the cavity in the end of the bone and capable of being impacted and wedged, by itself, into the cavity in the end of the bone for obtaining a press fit of the hollow sleeve in the cavity prior to connecting the hollow sleeve to the stem component, wherein said hollow sleeve consists 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 hollow sleeve for restoring lost bone stock in the cavity in the end of the bone in the area occupied by the hollow sleeve when the hollow sleeve is implanted in the cavity in the end of the bone; and
an adhesive deliverable to said axial channel for interdigitation into said porous structure for securing said stem component in said channel.

2. The prosthetic system of claim 1 , wherein the hollow sleeve has a sloped outer surface with a first end of the hollow sleeve having a comparatively larger perimeter than an opposite second end of the hollow sleeve.

3. The prosthetic system of claim 1 , wherein said hollow sleeve is cylindrical.

4. The prosthetic system of claim 1 , wherein an interior surface of said axial channel has a corrugated texture.

5. The prosthetic system of claim 1 , wherein said hollow sleeve is formed with a porous metal alloy.

6. An orthopedic device implantable in a cavity in an end of a bone, the orthopedic device comprising:
a hollow sleeve for occupying an area in a cavity in an end of a bone, the hollow sleeve including an exterior surface securable to an inner surface of the cavity and an interior surface situated along an axial channel that extends through the length of the hollow sleeve for accommodating a stem component of a prosthetic implant, said hollow sleeve 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 hollow sleeve for restoring lost bone stock in the cavity in the end of the bone in the area occupied by the hollow sleeve when the hollow sleeve is implanted in the cavity in the end of the bone, wherein the hollow sleeve is capable of being positioned, by itself, in the cavity in the end of the bone, and wherein the hollow sleeve, despite consisting essentially of said porous metal material, is capable of being impacted and wedged, by itself, into the cavity in the end of the bone for obtaining a press fit of the hollow sleeve in the cavity, with said bone ingrowth-receptive material providing both said exterior surface and said interior surface of said hollow sleeve.

7. The orthopedic device of claim 6 , further comprising a prosthetic implant including a stem component positionable in said axial channel.

8. The orthopedic device of claim 7 , further comprising an adhesive deliverable to said channel for securing said stem component in said axial channel.

9. The orthopedic device of claim 6 , wherein the hollow sleeve has a sloped outer surface with a first end of the hollow sleeve having a comparatively larger perimeter than an opposite second end of the hollow sleeve.

10. The orthopedic device of claim 9 , wherein said axial channel is sloped.

11. The orthopedic device of claim 6 , wherein said hollow sleeve is cylindrical.

12. The orthopedic device of claim 11 , wherein said hollow sleeve includes a first longitudinal section with a comparatively smaller diameter than a second longitudinal section of the hollow sleeve.

13. The orthopedic device of claim 6 , wherein said axial channel includes a textured interior surface.

14. The orthopedic device of claim 6 , wherein an interior surface of said axial channel is textured or corrugated.

15. The orthopedic device of claim 6 , wherein said hollow sleeve is formed with a porous metal alloy.

16. The orthopedic device of claim 15 , wherein said hollow sleeve is formed with a porous titanium alloy.

17. An orthopedic device implantable in a cavity in an end of a bone, the orthopedic device comprising:
a hollow sleeve for occupying an area in a cavity in an end of a bone, the hollow sleeve securable to an inner surface of the cavity, wherein said hollow sleeve consists 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 structure for restoring lost bone stock in the cavity in the end of the bone in the area occupied by the hollow sleeve when the hollow sleeve is implanted in the cavity in the end of the bone, said hollow sleeve including an exterior surface and an interior surface with said porous structure extending between said exterior surface and said interior surface, said interior surface situated along an axial channel that extends through the length of the hollow sleeve for accommodating a stem component of a prosthetic implant, wherein the hollow sleeve is capable of being positioned, by itself, in the cavity in the end of the bone, and wherein the hollow sleeve, despite consisting essentially of said porous metal material, is capable of being impacted and wedged, by itself, into the cavity in the end of the bone for obtaining a press fit of the hollow sleeve in the cavity.

18. The orthopedic device of claim 17 , further comprising a prosthetic implant with a stem component positionable in said axial channel.

19. The orthopedic device of claim 18 , further comprising an adhesive deliverable to said channel for securing said stem component in said axial channel.

20. The orthopedic device of claim 17 , wherein the hollow sleeve has a sloped outer surface with a first end of the hollow sleeve having a comparatively larger perimeter than a second end of the hollow sleeve.

21. The orthopedic device of claim 20 , wherein said axial channel is sloped.

22. The orthopedic device of claim 17 , wherein said hollow sleeve is cylindrical.

23. The prosthetic system of claim 22 , wherein said hollow sleeve includes a first longitudinal section with a comparatively smaller diameter than a second longitudinal section of the hollow sleeve.

24. The prosthetic system of claim 17 , wherein an interior surface of said axial channel is textured or corrugated.

25. The prosthetic system of claim 17 , wherein said hollow sleeve is formed with a porous metal alloy.

26. The prosthetic system of claim 1 , wherein the prosthetic implant is a prosthetic knee implant.

27. The prosthetic system of claim 26 , wherein the prosthetic knee implant is a proximal tibia implant.

28. The prosthetic system of claim 26 , wherein the prosthetic knee implant is a distal femoral implant.

29. The orthopedic device of claim 7 , wherein the prosthetic implant is a prosthetic knee implant.

Assignees

• Hanssen Arlen D
• Lewallen David
• Zimmer Inc

Inventors

• Hanssen Arlen D
• Lewallen David

Classifications

• A61F2002/30606

  Sets comprising both cemented and non-cemented endoprostheses · CPC title

• A61F2/3662

  Femoral shafts · CPC title

• A61F2002/3611

  Heads or epiphyseal parts of femur · CPC title

• A61F2002/30235

  tubular, e.g. sleeves · CPC title

• A61F2002/30736

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