Skeletal reconstruction cages
View Patent ↗Skeletal reconstruction cages include a central body having first and second ends, a first end cap coupled to one end of the central body, and a second end cap coupled to the other end of the central body. At least two of the central body, first end cap, and second end cap are formed from bone. Each of the central body, first end cap, and second end cap may be provided in different sizes so that cages with varying overall heights, and related angulations, may be created.
1. A skeletal reconstruction cage for implantation between an upper vertebra and a lower vertebra, the cage comprising:
a central body having a first end, a second end, and a hole extending therebetween, the hole having a first portion, a second portion proximate to the first end, and a shoulder positioned between the first and second portions, a recess defined in the second portion;
a first end cap including a ridge portion defining an upper face for contacting at least a portion of the upper vertebra and a base portion;
a second end cap including a ridge portion defining a lower face for contacting at least a portion of the lower vertebra and a base portion, wherein the base portion of the second end cap is receivable within the hole of the central body at the second end; and
a pre-formed cancellous bone insert configured to be inserted into the hole;
wherein the base portion of the first end cap is keyed with respect to the recess of the second portion so that the base portion of the first end cap is insertable into the recess in at least two different orientations such that the base portion of the first end cap abuts the shoulder; and
wherein at least one of the end caps is formed of cortical bone.
2. The cage of claim 1 , wherein the insert has a first end and a second end, and wherein the first end cap is coupled to the first end of the insert, and the second end cap is coupled to the second end of the insert.
3. The cage of claim 2 , wherein the first end cap is press-fit onto the first end of the insert.
4. The cage of claim 1 , wherein at least one of the insert and end caps is at least partially demineralized.
5. The cage of claim 1 , wherein the insert substantially fills the hole.
6. The cage of claim 1 , wherein the central body has a plurality of perforations so as to expose a portion of the insert.
7. The cage of claim 1 , wherein the central body is substantially mesh-like.
8. The cage of claim 7 , wherein the central body is comprised of titanium.
9. The cage of claim 1 , wherein the insert has a diameter between about 7 mm and about 31 mm.
10. The cage of claim 1 ,
wherein the hole has a first cross-sectional shape, and the insert has a second cross-sectional shape; and
wherein the first cross-sectional shape is substantially different than the second cross-sectional shape.
11. The cage of claim 10 , wherein the first cross-sectional shape is substantially oval.
12. The cage of claim 10 , wherein the second cross-sectional shape is substantially circular.
13. The cage of claim 1 ,
wherein the insert comprises at least a first through-hole extending therethrough, the first through-hole being sized and configured to receive an osteoinductive material.
14. The cage of claim 13 , wherein the insert has a first end face and a second end face, and wherein the first through-hole extends from the first end face through to the second end face.
15. The cage of claim 13 , wherein the insert has a first end face and a second end face, and wherein the first through-hole extends substantially transverse the first and second end faces.
16. The cage of claim 13 , wherein the insert has a first end face and a second end face, and wherein the first through-hole is substantially angulated with respect to the first and second end faces.
17. The cage of claim 1 ,
wherein the insert is formed from at least a first insert and a second insert, the first insert including a female portion and the second insert including a male portion, the male portion being sized and configured to engage the female portion.
18. The cage of claim 17 , wherein the first insert is secured to the second insert.
19. The cage of claim 17 , wherein the first and second inserts are mated in a groove and tongue arrangement.
20. The cage of claim 1 ,
wherein the length of the insert is greater than the length of the length of the central body.
21. The cage of claim 20 , wherein the insert has a first end and a second end, and wherein when the insert is inserted into the hole, the first end of the insert extends beyond the first end of the central body, and the second end of the insert extends beyond the second end of the central body.