IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0089087
(2005-03-24)
|
등록번호 |
US-8105383
(2012-01-31)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
38 인용 특허 :
80 |
초록
▼
The present invention is directed to a major long bone ring implant for insertion into an implantation space formed across a spinal disc between two adjacent vertebral bodies of the spine. The implantation space has a wall portion, lip, or ridge with a flat portion for abutting the leading end of th
The present invention is directed to a major long bone ring implant for insertion into an implantation space formed across a spinal disc between two adjacent vertebral bodies of the spine. The implantation space has a wall portion, lip, or ridge with a flat portion for abutting the leading end of the bone ring implant. The bone ring implant has a leading end and a trailing end connected by opposed sides. The leading end has a straight cut portion. The opposed sides have portions that are preferably straight and at a 90° angle to the straight cut portion of the leading end to produce straight portions that are outwardly facing. The bone ring implant may be machined from a single bone or manufactured from a composite of cortical fibers, filaments, or particles. The bone ring implant may be used in combination with lockable screws, and preferably screw locks each preferably made of cortical bone or of a bioresorbable material.
대표청구항
▼
1. An interbody spinal implant made of a bone composite material for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine and into at least a portion of the endplates of the vertebral bodies, the implantatio
1. An interbody spinal implant made of a bone composite material for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine and into at least a portion of the endplates of the vertebral bodies, the implantation space having a front wall, said implant comprising: a body manufactured from a bone composite material, said body having a perimeter with a leading end, a trailing end opposite said leading end, and opposite exterior sides, said body having a mid-longitudinal axis passing through said leading and trailing ends, said leading end having a straight portion in a direction from one of said opposite exterior sides to another of said opposite exterior sides along a portion of the perimeter of said body adapted to abut the front wall of the implantation space when said implant is installed into the implantation space;opposite upper and lower surfaces adapted to be placed in contact with and to support the adjacent vertebral bodies, said upper and lower surfaces being non-arcuate;said opposite exterior sides connecting said upper and lower surfaces and said leading and trailing ends, said opposite exterior sides of said implant having straight portions that are parallel to each other; andan opening passing through said upper and lower surfaces for permitting for the growth of bone from adjacent vertebral body to adjacent vertebral body through said implant, said opening being between said straight portions of said opposite exterior sides and having a maximum width transverse to the mid-longitudinal axis of said body, said trailing end having a non-linear portion between two lines parallel to the mid-longitudinal axis, the parallel lines being spaced apart from one another on opposite sides of the mid-longitudinal axis and intersecting the maximum width of said opening; andwherein said implant is in combination with at least one bone screw adapted to engage at least one vertebral body when inserted through said implant, said implant comprising a lock for locking said at least one bone screw to said implant, said lock being made of one of cortical bone and a bioresorbable material. 2. The implant of claim 1, wherein said straight portion of said leading end is generally oriented at 90 degrees to the mid-longitudinal axis of the implant. 3. The implant of claim 1, wherein said straight portion of said at least one side is generally oriented 90 degrees to said straight portion of said leading end. 4. The implant of claim 1, wherein said straight portion of said at least one side is oriented generally parallel to the mid-longitudinal axis of said implant. 5. The implant of claim 1, further comprising at least one protrusion extending from at least one of said upper and lower surfaces for engaging at least one of the adjacent vertebral bodies to maintain said implant within the implantation space. 6. The implant of claim 5, wherein said protrusion comprises at least one of a ridge, ratcheting, spline, and knurling. 7. The implant of claim 1, wherein said upper and lower surfaces are porous. 8. The implant of claim 1, wherein said upper and lower surfaces include a bone ingrowth surface. 9. The implant of claim 1, wherein the perimeter of said body forms at least a portion of a ring. 10. The implant of claim 1, wherein said implant has a closed perimeter. 11. The implant of claim 1, wherein said implant has an open perimeter for providing access to said opening. 12. The implant of claim 1, wherein said implant is generally rectangular in shape. 13. The implant of claim 1, wherein said implant is generally oval in shape. 14. The implant of claim 1, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other. 15. The implant of claim 1, wherein at least a portion of said leading end is tapered for facilitating insertion of said implant between the two adjacent vertebral bodies. 16. The implant of claim 1, wherein said implant is adapted for insertion from the anterior aspect of the vertebral bodies and said trailing end is configured to conform to the anatomic contour of at least a portion of the anterior aspect of the vertebral bodies. 17. The implant of claim 1, wherein said implant has a maximum length less than and approximating the posterior to anterior depth of the vertebral bodies. 18. The implant of claim 1, wherein said implant has a width greater than one half the width of the adjacent vertebral bodies. 19. The implant of claim 1, wherein said opening is compressively loaded with fusion promoting material. 20. The implant of claim 1, further comprising at least a second opening passing through said upper and lower surfaces for permitting for the growth of bone from adjacent vertebral body to adjacent vertebral body through said implant. 21. The implant of claim 20, wherein said second opening communicates with said opening. 22. The implant of claim 1, further comprising a plurality of openings and passages adapted to retain a fusion promoting substance. 23. An interbody spinal implant made of a bone composite material for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine and into at least a portion of the endplates of the vertebral bodies, the implantation space having a front wall, said implant comprising: a body manufactured from a bone composite material, said body having a perimeter with a leading end, a trailing end opposite said leading end, and opposite exterior sides, said body having a mid-longitudinal axis passing through said leading and trailing ends, said leading end having a straight portion in a direction from one of said opposite exterior sides to another of said opposite exterior sides along a portion of the perimeter of said body adapted to abut the front wall of the implantation space when said implant is installed into the implantation space;opposite upper and lower surfaces adapted to be placed in contact with and to support the adjacent vertebral bodies, said upper and lower surfaces being non-arcuate;said opposite exterior sides connecting said upper and lower surfaces and said leading and trailing ends, said opposite exterior sides of said implant having straight portions that are parallel to each other; andan opening passing through said upper and lower surfaces for permitting for the growth of bone from adjacent vertebral body to adjacent vertebral body through said implant, said opening being between said straight portions of said opposite exterior sides and having a maximum width transverse to the mid-longitudinal axis of said body, said opening having a perimeter, a majority of said perimeter of said opening being non-linear, said trailing end having a non-linear portion between two lines parallel to the mid-longitudinal axis, the parallel lines being spaced apart at a distance from one another on opposite sides of the mid-longitudinal axis and intersecting the maximum width of said opening, said non-linear portion of said trailing end extending across a majority of the distance between the parallel lines;wherein said implant is in combination with at least one bone screw adapted to engage at least one vertebral body when inserted through said implant, said implant comprising a lock for locking said at least one bone screw to said implant, said lock being made of one of cortical bone and a bioresorbable material. 24. The implant of claim 1, wherein said at least one bone screw is made of one of cortical bone and a bioresorbable material. 25. The implant of claim 1, wherein said composite material includes filaments of bone. 26. The implant of claim 1, wherein said composite material includes a bioresorbable plastic. 27. The implant of claim 1, wherein said composite material includes ceramic. 28. The implant of claim 1, further in combination with fusion promoting substances. 29. The implant of claim 1, in combination with a fusion promoting material other than bone. 30. The implant of claim 1, wherein said implant comprises a bone ingrowth material other than bone. 31. The implant of claim 1, further comprising a material, other than the bone from which said implant is formed, that intrinsically participates in the growth of bone from one of the adjacent vertebral bodies to the other of the adjacent vertebral bodies. 32. The implant of claim 29, wherein said fusion promoting material is bone morphogenetic protein. 33. The implant of claim 1, further in combination with bone morphogenetic protein. 34. The implant of claim 1, further in combination with an osteogenic material. 35. The implant of claim 34, wherein said osteogenic material is a material other than bone. 36. The implant of claim 35, wherein said material is genetic material coding for the production of bone. 37. The implant of claim 1, further in combination with genetic material coding for production of bone. 38. The implant of claim 1, in combination with a chemical substance to inhibit scar formation. 39. The implant of claim 23, wherein said straight portion of said leading end is generally oriented at 90 degrees to the mid-longitudinal axis of the implant. 40. The implant of claim 23, wherein said straight portion of said at least one side is generally oriented 90 degrees to said straight, portion of said leading end. 41. The implant of claim 23, further comprising at least one protrusion extending from at least one of said upper and lower surfaces for engaging at least one of the adjacent vertebral bodies to maintain said implant within the implantation space. 42. The implant of claim 41, wherein said protrusion comprises at least one of a ridge, ratcheting, spline, and knurling. 43. The implant of claim 41, wherein said at least one protrusion is configured to facilitate motion of said implant in a direction of insertion into the implantation space and resist motion in a direction opposite to the direction of insertion. 44. The implant of claim 23, wherein said implant has a closed perimeter. 45. The implant of claim 23, wherein said implant has an open perimeter for providing access to said opening. 46. The implant of claim 23, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other. 47. The implant of claim 23, wherein at least a portion of said leading end is tapered for facilitating insertion of said implant between the two adjacent vertebral bodies. 48. The implant of claim 23, wherein said implant has a width greater than one half the width of the adjacent vertebral bodies adjacent the implantation space into which said implant is to be inserted. 49. The implant of claim 23, further comprising at least a second opening passing through said upper and lower surfaces for permitting for the growth of bone from adjacent vertebral body to adjacent vertebral body through said implant. 50. The implant of claim 23, further in combination with fusion promoting substances. 51. The implant of claim 50, wherein said fusion promoting includes at least one of bone, bone morphogenetic protein, and genetic material coding for the production of bone. 52. The implant of claim 23, further in combination with a chemical substance to inhibit scar formation. 53. The implant of claim 23, wherein said trailing end includes at least two bone screw openings, each of said bone screw openings being adapted to receive a bone screw.
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