초록 ▼

An allogenic intervertebral implant for fusing vertebrae is disclosed. The implant is a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra. The implant has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and

An allogenic intervertebral implant for fusing vertebrae is disclosed. The implant is a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra. The implant has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and bottom surfaces of the implant have a plurality of teeth to resist expulsion and provide initial stability. The implant according to the present invention provides initial stability need for fusion without stress shielding.

대표청구항 ▼

What is claimed is: 1. An intervertebral implant comprising at least one piece of allogenic bone provided with a hollow interior space, the implant having top and bottom surfaces configured and adapted in use to face endplates of adjacent vertebrae; wherein at least a portion of the top and bottom

What is claimed is: 1. An intervertebral implant comprising at least one piece of allogenic bone provided with a hollow interior space, the implant having top and bottom surfaces configured and adapted in use to face endplates of adjacent vertebrae; wherein at least a portion of the top and bottom surfaces is textured to resist migration of the implant, the implant further comprising a mid-plane, and wherein the top surface is inclined in a range between about 4.2째 and about 15째 with respect to the mid-plane; and wherein the implant has a length between about 8 mm and about 30 mm. 2. The implant of claim 1, wherein the length is between about 8 mm and about 18 mm. 3. The implant of claim 1, wherein the length is between about 22 mm and about 30 mm. 4. The implant of claim 1, wherein the length is between about 15 mm and about 30 mm. 5. The implant of claim 1, wherein at least one textured portion comprises a plurality of teeth. 6. The implant of claim 5, wherein the teeth are arranged in a plurality of adjacent rows. 7. The implant of claim 5, wherein the teeth have a pyramidal shape profile. 8. The implant of claim 5, wherein the teeth have a saw tooth shape. 9. The implant of claim 1, wherein the implant is made entirely of allogenic bone. 10. The implant of claim 1, wherein the implant has a height between about 4 mm and about 30 mm. 11. The implant of claim 1, wherein the implant has a width between about 6 mm and about 15 mm. 12. The implant of claim 1, wherein the implant further includes a first lateral side and a second lateral side, the first and second lateral sides having a channel formed therein, the channel being sized and configured to receive a surgical instrument. 13. The implant of claim 1, wherein the implant further comprises a threaded hole for engaging a threaded pin of a surgical instrument. 14. The implant of claim 1, wherein the implant further comprises an anterior side and a posterior side, the incline being sized and configured so that a height of the implant gradually decreases from the anterior side to the posterior side. 15. The implant of claim 14, wherein the anterior side of the implant includes a transition forming a rounded edge between the anterior side and the top surface and between the anterior side and the bottom surface to facilitate insertion of the implant. 16. The implant of claim 1, wherein the top and bottom surfaces are curved surfaces. 17. The implant of claim 16, wherein the curved top and bottom surfaces conform to the contours of the end plates. 18. The implant of claim 1, wherein the implant is formed from at least two pieces of allogenic bone joined together. 19. The implant of claim 18, wherein the implant comprises a first lateral piece joined to a second lateral piece. 20. The implant of claim 19, wherein the first and second lateral pieces are substantially C-shaped so that when joined side by side they define the hollow interior space. 21. The implant of claim 19, further comprising at least one pin for joining the first and second lateral pieces. 22. The implant of claim 18, wherein the at least two pieces of allogenic are joined together by at least one pin. 23. The implant of claim 1, wherein the hollow interior space extends from the top surface to the bottom surface. 24. An intervertebral implant comprising at least one piece of allogenic bone provided with a hollow interior space, the implant having top and bottom surfaces configured and adapted in use to face endplates of adjacent vertebrae; wherein at least a portion of the top and bottom surfaces is textured to resist migration of the implant, the implant further comprising a mid-plane, and wherein the top surface is inclined in a range between about 4.2째 and about 15째 with respect to the mid-plane; the implant further comprising an anterior side and a posterior side; wherein the implant has a height between about 4 mm and about 100 mm. 25. The implant of claim 24, wherein the height is between about 10 mm and about 100 mm. 26. The implant of claim 24, wherein the height is between about 4 mm and about 30 mm. 27. The implant of claim 24, wherein the height is between about 4 mm and about 20 mm. 28. The implant of claim 24, wherein the height of the anterior side is larger than the height of the posterior side. 29. The implant of claim 24, wherein the height of the anterior side is substantially equal to the height of the posterior side. 30. The implant of claim 24, wherein at least one textured portion comprises a plurality of teeth. 31. The implant of claim 30, wherein the teeth are arranged in a plurality of adjacent rows. 32. The implant of claim 30, wherein the teeth have a pyramidal shape profile. 33. An intervertebral implant comprising at least one piece of allogenic bone provided with a hollow interior space, the implant having top and bottom surfaces configured and adapted in use to face endplates of adjacent vertebrae; wherein at least a portion of the top and bottom surfaces is textured to resist migration of the implant, the implant further comprising a mid-plane, and wherein the top surface and bottom surface are substantially parallel to the mid-plane; the implant further comprising an anterior side and a posterior side; wherein the implant has a height between about 4 mm and about 100 mm and wherein the height of the anterior side is larger than the height of the posterior side. 34. The implant of claim 33, wherein the height is between about 10 mm and about 100 mm. 35. The implant of claim 33, wherein the height is between about 4 mm and about 30 mm. 36. The implant of claim 33, wherein the height is between about 4 mm and about 20 mm. 37. The implant of claim 33, wherein at least one textured portion comprises a plurality of teeth. 38. The implant of claim 37, wherein the teeth are arranged in a plurality of adjacent rows. 39. The implant of claim 37, wherein the teeth have a pyramidal shape profile. 40. An intervertebral implant comprising at least one piece of allogenic bone provided with a hollow interior space, the implant having top and bottom surfaces configured and adapted in use to face endplates of adjacent vertebrae; wherein at least a portion of the top and bottom surfaces is textured to resist migration of the implant, the implant further comprising a mid-plane, and wherein the top surface is inclined in a range between about 4.2째 and about 15째 with respect to the mid-plane; the implant further comprising an anterior side and a posterior side; wherein the implant has a width between about 6 mm and about 15 mm.