IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0658220
(2010-02-03)
|
등록번호 |
US-8343220
(2013-01-01)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
157 |
초록
▼
Tapered root threaded hollow perforated interbody spinal fusion implants are disclosed for placement into a disc space in a human spine between adjacent vertebral bodies. The implants have opposite arcuate portions with lockable screws passing therethrough for engaging each of the adjacent vertebral
Tapered root threaded hollow perforated interbody spinal fusion implants are disclosed for placement into a disc space in a human spine between adjacent vertebral bodies. The implants have opposite arcuate portions with lockable screws passing therethrough for engaging each of the adjacent vertebral bodies. The implants are adapted for use in side-by-side pairs such that a portion of the circumference of a first implant nests within the circumference of a second implant, so as to have a reduced combined width.
대표청구항
▼
1. An interbody spinal fusion implant for insertion across a disc space between two adjacent vertebral bodies of a human spine, said implant comprising: a leading end, a trailing end opposite said leading end and a length therebetween;a hollow interior;opposite arcuate portions adapted for placement
1. An interbody spinal fusion implant for insertion across a disc space between two adjacent vertebral bodies of a human spine, said implant comprising: a leading end, a trailing end opposite said leading end and a length therebetween;a hollow interior;opposite arcuate portions adapted for placement toward and at least in part within the adjacent vertebral bodies and having a distance therebetween defining an implant height greater than the normal height of the disc space, each of said opposite arcuate portions having at least one opening communicating with one another and said hollow interior;at least a portion of a thread formed on the exterior of each of said opposite arcuate portions for penetrably engaging the adjacent vertebral bodies;a leading support wall connecting said opposite arcuate portions at said leading end;a trailing support wall connecting said opposite arcuate portions at said trailing end; anda lateral side and a medial side opposite said lateral side, said lateral side including a side support wall connecting said opposite arcuate portions, said medial side including an opening extending from one of said opposite arcuate portions to the other of said opposite arcuate portions and extending from said leading support wall to said trailing support wall along a majority of the length of said implant, each of said arcuate portions terminating at an edge at said medial side, said opening in said medial side having a height in a plane perpendicular to the length of said implant, said edges being spaced apart a distance equal to the height of said opening in said medial side, said arcuate portions each having a surface from said edge to said hollow interior at said opening on said medial side, each of said surfaces being curved from said edge to said hollow interior in the plane perpendicular to the length of said implant. 2. The implant of claim 1, wherein said opposite arcuate portions form at least a portion of a cylinder along the length of said implant. 3. The implant of claim 1, wherein said opposite arcuate portions form a generally frusto-conical shape. 4. The implant of claim 1, wherein said trailing end of said implant has a perimeter, said perimeter of said trailing end proximate said medial side being configured to receive at least a portion of a perimeter of a trailing end of a second implant when the second implant is placed in close proximity to said implant. 5. The implant of claim 1, wherein said implant has an outer diameter having a circumference, said medial side adapted to receive at least a portion of a circumference of an outer diameter of a second implant. 6. The implant of claim 1, wherein the opening between said leading and trailing ends has a maximum dimension in a direction along the mid-longitudinal axis of said implant. 7. The implant of claim 1, wherein said side support wall and said opposite arcuate portions form parts of the same circle. 8. The implant of claim 1, wherein said leading and trailing support walls each include a concave portion at said medial side and a convex portion at said lateral side. 9. The implant of claim 1, wherein said implant is at least in part bioabsorbable. 10. The implant of claim 1, wherein said implant is in combination with a bone growth promoting material. 11. The implant of claim 1, wherein said implant has a central length from said leading end to said trailing end, said hollow interior being unobstructed along the entire central length of said implant. 12. An interbody spinal fusion implant for insertion across a disc space between two adjacent vertebral bodies of a human spine, said implant comprising: a leading end, a trailing end opposite said leading end and a length therebetween;a hollow interior;opposite arcuate portions adapted for placement toward and at least in part within the adjacent vertebral bodies and having a distance therebetween defining an implant height greater than the normal height of the disc space, each of said opposite arcuate portions having at least one opening communicating with one another and said hollow interior;at least a portion of a thread formed on the exterior of each of said opposite arcuate portions for penetrably engaging the adjacent vertebral bodies;a lateral side and a medial side opposite said lateral side, said lateral side including a side support wall connecting said opposite arcuate portions, said medial side of said implant including an opening extending from one of said opposite arcuate portions to the other of said opposite arcuate portions and extending from said leading end to said trailing end of said implant along a majority of the length of said implant, each of said arcuate portions terminating at an edge at said medial side, said opening in said medial side having a height in a plane perpendicular to the length of said implant, said edges being spaced apart a distance equal to the height of said opening in said medial side;a leading support wall connecting said opposite arcuate portions and said side support wall at said leading end of said implant, said leading support wall having a concave portion at said medial side of said implant adjacent said opening, said concave portion of said leading support wall and said opposite arcuate portions having substantially the same radius of curvature; anda trailing support wall connecting said opposite arcuate portions and said side support wall at said trailing end of said implant, said trailing support wall having a concave portion at said medial side of said implant adjacent said opening, said concave portion of said trailing support wall and said opposite arcuate portions having substantially the same radius of curvature. 13. The implant of claim 12, wherein said opposite arcuate portions form at least a portion of a cylinder along the length of said implant. 14. The implant of claim 12, wherein said opposite arcuate portions form a generally frusto-conical shape. 15. The implant of claim 12, wherein said trailing end of said implant has a perimeter, said perimeter of said trailing end proximate said medial side being configured to receive at least a portion of a perimeter of a trailing end of a second implant when the second implant is placed in close proximity to said implant. 16. The implant of claim 12, wherein said implant has an outer diameter having a circumference, said medial side adapted to receive at least a portion of a circumference of an outer diameter of a second implant. 17. The implant of claim 12, wherein the opening between said leading and trailing ends has a maximum dimension in a direction along the mid-longitudinal axis of said implant. 18. The implant of claim 12, wherein said side support wall and said opposite arcuate portions form parts of the same circle. 19. The implant of claim 12, wherein said implant is at least in part bioabsorbable. 20. The implant of claim 12, wherein said implant is in combination with a bone growth promoting material. 21. The implant of claim 12, wherein said implant has a central length from said leading end to said trailing end, said hollow interior being unobstructed along the entire central length of said implant. 22. A pair of non-identical, complementary, interbody spinal fusion implants for insertion across a disc space between two adjacent vertebral bodies of a spine, said pair of implants comprising: a first spinal fusion implant having a leading end, a trailing end opposite said leading end, a length, and a hollow interior therebetween, said first implant having opposite arcuate portions adapted for placement toward and at least in part within the adjacent vertebral bodies and having a distance therebetween defining a first implant height greater than the normal height of the disc space, each of said opposite arcuate portions having at least one opening communicating with one another and said hollow interior, at least a portion of a thread formed on the exterior of each of said opposite arcuate portions for penetrably engaging the adjacent vertebral bodies, a leading support wall connecting said opposite arcuate portions at said leading end, a trailing support wall connecting said opposite arcuate portions at said trailing end, said first implant having a lateral side and a medial side and having a distance therebetween defining a first implant width transverse to said first implant height, said first implant width being less than said first implant height along at least a portion of the length of said first implant, said lateral side of said first implant including a side support wall connecting said opposite arcuate portions, said medial side of said first implant including an opening extending from one of said opposite arcuate portions to the other of said opposite arcuate portions and extending from said leading support wall to said trailing support wall along a majority of the length of said first implant, each of said arcuate portions terminating at an edge at said medial side, said opening in said medial side having a height in a plane perpendicular to the length of said first implant, said edges being spaced apart a distance equal to the height of said opening in said medial side, said leading support wall having a concave portion at said medial side of said first implant adjacent said opening, said concave portion of said leading support wall and said opposite arcuate portions having substantially the same radius of curvature;a second spinal fusion implant having a leading end, a trailing end opposite said leading end, a length, and a hollow interior therebetween, said second implant having opposite arcuate portions adapted for placement toward and at least in part within the adjacent vertebral bodies and having a distance therebetween defining a second implant height greater than the normal height of the disc space, each of said opposite arcuate portions having at least one opening communicating with one another and said hollow interior, at least a portion of a thread formed on the exterior of each of said opposite arcuate portions for penetrably engaging the adjacent vertebral bodies, a leading support wall connecting said opposite arcuate portions at said leading end, a trailing support wall connecting said opposite arcuate portions at said trailing end, said second implant having a lateral side and a medial side and having a distance therebetween defining a second implant width transverse to said second implant height, said medial side and said lateral side of said second implant each including a side support wall connecting said opposite arcuate portions, said first implant being configured to receive at least a portion of said medial side of said second implant in said opening of said medial side of said first implant; andsaid first and second implants having a combined width when said medial side of said second implant is received by said medial side of said first implant being less than a sum of said first implant width and said second implant width. 23. The implants of claim 22, wherein said opposite arcuate portions of said first and second implants form at least a portion of a cylinder along the length of said first and second implants. 24. The implants of claim 22, wherein said opposite arcuate portions of said first and second implants form a generally frusto-conical shape. 25. The implants of claim 22, wherein said trailing end of said first implant has a perimeter, said perimeter of said trailing end of said first implant proximate said medial side of said first implant being configured to receive at least a portion of a perimeter of a trailing end of said second implant when said second implant is placed in close proximity to said first implant. 26. The implants of claim 22, wherein said first implant has an outer diameter having a circumference, said medial side of said first implant adapted to receive at least a portion of a circumference of an outer diameter of said second implant. 27. The implants of claim 22, wherein the opening between said leading and trailing ends of said first implant has a maximum dimension in a direction along the mid-longitudinal axis of said first implant. 28. The implants of claim 22, wherein said side support wall of said first implant and said opposite arcuate portions of said first implant form parts of the same circle. 29. The implants of claim 22, wherein said first and second implants are at least in part bioabsorbable. 30. The implants of claim 22, wherein said implants are in combination with a bone growth promoting material. 31. The implants of claim 22, wherein said arcuate portions of said first implant each have a surface from said edge to said hollow interior at said opening on said medial side, each of said surfaces being curved from said edge to said hollow interior in the plane perpendicular to the length of said first implant. 32. The implants of claim 22, wherein said first implant has a central length from said leading end to said trailing end, said hollow interior being unobstructed along the entire central length of said implant.
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