ACIS allograft designs

Patent metadata

Field	Value
Publication number	US-9566169-B2
Application number	US-201414208910-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Mar 13, 2014
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

Structural allograft fusion devices containing a single integral piece of cortical bone in combination with one or more pieces of cancellous bone, wherein the cortical and cancellous pieces are pinned together.

First claim

We claim:

1. An allograft composite spacer, comprising:
a) an integral cortical component comprising:
i. first and second opposing walls, each wall having an upper surface, a lower surface, a first end portion and a second end portion and
ii. a strut extending from the first end portion of the first cortical wall to the first end portion of the second cortical wall, wherein the strut does not extend to either the upper surface or the lower surface, and

b) a cancellous component having first and second lateral surfaces, an upper surface, a lower surface, a first end have a first end surface, a second end, and a recess in the first end surface extending from the first lateral surface to the second lateral surface,

wherein the strut of the cortical components is received in the recess of the cancellous component.

2. The spacer of claim 1 wherein the second end portions of the first and second opposing walls of the cortical component each include a throughhole, wherein the through holes are aligned.

3. The spacer of claim 2 further comprising:
c) an allograft pin inserted into both of the aligned throughholes.

4. The spacer of claim 1 wherein the second end portion of the first and second opposing walls of the cortical component has a second end face, and the second end portion of each opposing sidewall of the cortical component narrows towards the second endface.

5. The spacer of claim 1 wherein the upper and lower surfaces of the opposing walls of the cortical component each has gripping features thereon.

6. The spacer of claim 1 wherein the upper and lower surfaces of the cancellous component each has gripping features thereon.

7. The spacer of claim 1 wherein the upper and lower surfaces of the cortical component define a height therebetween, the upper and lower surfaces of the cancellous component define a height therebetween, and the height of cortical component is substantially equal to the height of the cancellous component.

8. An allograft composite spacer, comprising:
a) an integral cortical component comprising:
i. first and second opposing walls, each wall having an upper surface and a lower surface defining a height therebetween, a first end portion and a second end portion and
ii. a strut extending from the first end portion of the first cortical wall to the first end portion of the second cortical wall, wherein the strut does not extend to either the upper surface or the lower surface, wherein the strut runs substantially from the first end portion to the second end portion of each opposing wall,

b) upper and lower cancellous components, each having first and second lateral surfaces, an upper surface, a lower surface, a first end have a first end surface, a second end,
wherein the upper cancellous component is received above the strut and between the opposing walls, and
wherein the lower cancellous component is received below the strut and between the opposing walls.

9. The spacer of claim 8 wherein the second end portions of the first and second opposing walls of the cortical component each include a throughhole, wherein the through holes are aligned.

10. The spacer of claim 9 further comprising:
c) an allograft pin inserted into both of the aligned throughholes.

11. The spacer of claim 8 wherein the second end portion of the first and second opposing walls of the cortical component has a second end face, and the second end portion of each opposing sidewall of the cortical component narrows towards the second endface.

12. The spacer of claim 8 wherein the upper and lower surfaces of the opposing walls of the cortical component each has gripping features thereon.

13. The spacer of claim 8 wherein the upper and lower surfaces of the cancellous component each has gripping features thereon.

14. The spacer of claim 8 wherein the upper and lower surfaces of the cortical component define a height therebetween, the upper and lower surfaces of the cancellous component define a height therebetween, and the height of cortical component is less than the height of the combined cancellous components.

15. The spacer of claim 11 wherein the strut is located in a middle third of the height between the upper and lower surfaces of each opposing wall.

16. An allograft composite spacer, comprising:
a) an integral cortical component comprising:
i. first and second opposing walls, each wall having an upper surface and a lower surface defining a height therebetween, a first end portion and a second end portion and
ii. a strut extending from the first end portion of the first cortical wall to the first end portion of the second cortical wall, wherein the strut does not extend to either the upper surface or the lower surface, wherein the strut runs substantially from the first end portion to the second end portion of each opposing wall, the strut having a vertical throughhole therethrough

b) upper and lower cancellous components, each having first and second lateral surfaces, an upper surface, a lower surface, a first end have a first end surface, a second end, the upper cancellous component having an extension extending from its lower surface, the lower cancellous component having an extension extending from its upper surface

wherein the upper cancellous component is received substantially above the strut and between the opposing walls, and
wherein the lower cancellous component is received substantially below the strut and between the opposing walls, and
wherein each extension is received in the vertical throughhole.

17. The spacer of claim 16 wherein the second end portions of the first and second opposing walls of the cortical component each include a throughhole, wherein the through holes are aligned.

18. The spacer of claim 17 further comprising:
c) an allograft pin inserted into both of the aligned throughholes.

19. The spacer of claim 16 wherein the second end portion of the first and second opposing walls of the cortical component has a second end face, and the second end portion of each opposing sidewall of the cortical component narrows towards the second endface.

20. The spacer of claim 16 wherein the upper and lower surfaces of the opposing walls of the cortical component each has gripping features thereon.

21. The spacer of claim 16 wherein the upper and lower surfaces of the cancellous component each has gripping features thereon.

22. The spacer of claim 16 wherein the upper and lower surfaces of the cortical component define a height therebetween, the upper and lower surfaces of the cancellous component define a height therebetween, and the height of cortical component is substantially equal to the height of the combined cancellous components.

23. The spacer of claim 16 wherein the strut is located in a middle third of the height between the upper and lower surfaces of each opposing wall.

24. The spacer of claim 16 wherein the extension of the upper cancellous component contacts the extension of the lower cancellous component.

25. An allograft composite spacer, comprising:
a) an integral cortical component comprising:
i. first and second opposing walls, each wall having an upper surface, a lower surface, a first end portion and a second end portion and
ii. a strut extending from the first end portion of the first cortical wall to the first end portion of the second cortical wall, wherein the strut does not extend to either the upper surface or

Assignees

• Depuy Synthes Products Inc

Inventors

• Mazzuca Michael
• Gamache Thomas

Classifications

• A61F2002/30057

  made from both cortical and cancellous adjacent parts · CPC title

• A61F2250/006

  modular · CPC title

• A61F2250/0062

  Kits of prosthetic parts to be assembled in various combinations for forming different prostheses · CPC title

• A61F2002/30383

  made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove · CPC title

• A61F2250/0063

  Nested prosthetic parts · CPC title