IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0587196
(2009-10-02)
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등록번호 |
US-8137403
(2012-03-20)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
18 인용 특허 :
163 |
초록
▼
An interbody spinal implant comprising cortical bone having a width less than one-half the width of the disc space into which it is adapted to be inserted. The implant has a leading end that is asymmetrical from side to side and/or includes a straight portion adapted to be used in side-by-side pairs
An interbody spinal implant comprising cortical bone having a width less than one-half the width of the disc space into which it is adapted to be inserted. The implant has a leading end that is asymmetrical from side to side and/or includes a straight portion adapted to be used in side-by-side pairs.
대표청구항
▼
1. An interbody spinal implant made of cortical bone 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, the vertebral bodies having an anterior aspect and a posterior aspect, said implant comprising:
1. An interbody spinal implant made of cortical bone 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, the vertebral bodies having an anterior aspect and a posterior aspect, said implant comprising: a leading end for insertion first into the disc space, a trailing end opposite said leading end, said implant having a length along a mid-longitudinal axis of said implant from said leading end to said trailing end;opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies, said upper and lower portions being non-arcuate along at least a portion of the length of said implant; andan interior facing side, an exterior facing side opposite said interior side, and a maximum width therebetween, said maximum width of said implant being less than approximately one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted, said interior and exterior sides connecting said upper and lower portions and said leading and trailing ends, said leading end having a generally straight portion from side to side, the mid-longitudinal axis of said implant intersecting at a mid-point a plane perpendicular to the mid-longitudinal axis and bisecting the length of said implant into two equal parts, at least a portion of each of said upper and lower portions being on the mid-longitudinal axis closer to the mid-point than to either of said leading and trailing ends, said trailing end being curved to form approximately one quarter of a circle from one of said opposite sides to another one of said opposite sides, said trailing end having an opening configured to cooperatively engage an instrument adapted to install said implant into the implantation space, said interior side and said exterior side each having a generally straight portion parallel to the mid-longitudinal axis of said implant and forming a corner with said generally straight portion of said leading end, said interior side adapted to be oriented toward an interior side of another implant when inserted within the disc space;said implant being manufactured from a bone ring obtained from a major long bone of a human having a medullary canal, said interior side of said implant including at least a portion of the medullary canal so that when said implant is placed side by side with another implant having an interior side including at least a portion of a medullary canal, a passage is formed adapted to hold bone growth promoting material for permitting for the growth of bone from vertebral body to vertebral body through said passage. 2. The implant of claim 1, wherein said trailing end is asymmetrical side to side. 3. The implant of claim 1, wherein said interior and exterior sides are at least in part generally parallel one another. 4. 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. 5. The implant of claim 1, wherein said upper and lower surfaces include at least one opening in communication with one another to permit for the growth of bone from vertebral body to vertebral body through said implant. 6. The implant of claim 1, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling. 7. The implant of claim 1, in combination with a bone growth promoting material. 8. The implant of claim 7, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone. 9. An interbody spinal implant made of 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, the vertebral bodies having an anterior aspect and a posterior aspect, said implant comprising: a leading end for insertion first into the disc space, a trailing end opposite said leading end, said implant having a length along a mid-longitudinal axis of said implant from said leading end to said trailing end;opposed upper and lower portions between said leading and trailing ends adapted to be placed within the disc space to contact and support the adjacent vertebral bodies, said upper and lower portions being non-arcuate along at least a portion of the length of said implant; andan interior side, an exterior side opposite said interior side, and a maximum width therebetween, said maximum width of said implant being less than approximately one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted, said interior and exterior sides connecting said upper and lower portions and said leading and trailing ends, said leading end having a generally straight portion from side to side, the mid-longitudinal axis of said implant intersecting at a mid-point a plane perpendicular to the mid-longitudinal axis and bisecting the length of said implant into two equal parts, at least a portion of each of said upper and lower portions being on the mid-longitudinal axis closer to the mid-point than to either of said leading and trailing ends, said trailing end being curved to form approximately one quarter of a circle from one of said opposite sides to'another one of said opposite sides, said trailing end having an opening configured to cooperatively engage an instrument adapted to install said implant into the implantation space, said interior side and said exterior side each having a generally straight portion parallel to the mid-longitudinal axis of said implant and forming a corner with said generally straight portion of said leading end, said interior side adapted to be oriented toward an interior side of another implant when inserted within the disc space;said implant being manufactured from a bone composite material, said interior side of said implant including a recess so that when said implant is placed side by side with another implant having an interior side including a recess, a passage is formed adapted to hold bone growth promoting material for permitting for the growth of bone from vertebral body to vertebral body through said passage. 10. The implant of claim 9, wherein said bone composite material includes at least one of cortical bone fibers, bone filaments, bone particles and bone dust. 11. The implant of claim 9, wherein said trailing end is asymmetrical side to side. 12. The implant of claim 9, wherein said interior and exterior sides are at least in part generally parallel one another. 13. The implant of claim 9, 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. 14. The implant of claim 9 wherein said upper and lower surfaces include at least one opening in communication with one another to permit for the growth of bone from vertebral body to vertebral body through said implant. 15. The implant of claim 9, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling. 16. The implant of claim 9, in combination with a bone growth promoting material. 17. The implant of claim 16, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone. 18. The implant of claim 9, wherein said implant is at least in part resorbable.
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