Spinal fusion implant having deployable bone engaging projections
First Claim
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1. An interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:
- a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said horsing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, a height between said upper and lower surfaces, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing, said hollow interior having a maximum width perpendicular to the height and the mid-longitudinal axis of said housing; and
a substantially hollow internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, a bottom, and an open interior between said top and said bottom, each of said top and said bottom of said rotatable member including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the mid-longitudinal axis of said rotatable member, said top and said bottom including at least one aperture therein in communication with said open interior of said rotatable member and with each other to permit for the growth of bane from vertebral body to vertebral body therethrough, said rotatable member being adapted to rotate at least in part within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position, said rotatable member having a first dimension measured from one of said bone engaging projections on said top to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis and a second dimension measured from one of said bone engaging projections on said bottom to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis, the sum of said first and second dimensions being greater than the maximum width of said hollow interior of said housing.
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Abstract
An interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine having an external housing and a substantially hollow internal rotatable member having bone engaging projections that are deployable through the housing to penetrably engage the adjacent vertebral bodies.
254 Citations
212 Claims
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1. An interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:
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a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said horsing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, a height between said upper and lower surfaces, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing, said hollow interior having a maximum width perpendicular to the height and the mid-longitudinal axis of said housing; and
a substantially hollow internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, a bottom, and an open interior between said top and said bottom, each of said top and said bottom of said rotatable member including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the mid-longitudinal axis of said rotatable member, said top and said bottom including at least one aperture therein in communication with said open interior of said rotatable member and with each other to permit for the growth of bane from vertebral body to vertebral body therethrough, said rotatable member being adapted to rotate at least in part within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position, said rotatable member having a first dimension measured from one of said bone engaging projections on said top to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis and a second dimension measured from one of said bone engaging projections on said bottom to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis, the sum of said first and second dimensions being greater than the maximum width of said hollow interior of said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 139)
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96. An interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spiral implant comprising:
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a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said housing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface adapted to contact another one of the adjacent vertebral bodies, a height between said upper and lower surfaces, and a hollow interior configure to hold bone growth promoting material therein, said upper and lower surfaces;
each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing, said hollow interior having a maximum width perpendicular to the height and the mid-longitudinal axis of said housing; and
an internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, and a bottom, each of said top and said bottom of said rotatable member including a plurality of bone engaging projections spaced apart from one another along the mid-longitudinal axis of said rotatable member, each of said top and said bottom of said rotatable member including at least one aperture therein to permit or the growth of bone from vertebral body to vertebral body through said rotatable member, said bone engaging projections adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projections about the longitudinal mid-longitudinal axis of said rotatable member, said rotatable member being adapted to rotate within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position, said rotatable member having a first dimension measured from one of said bone engaging projections on said top to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis and a second dimension measured from one of said bone engaging projections on said bottom to the mid-longitudinal axis along a line perpendicular to the mid-longitudinal axis, the sum of said first and second dimensions being greater than the maximum width of said hollow interior of said housing. - View Dependent Claims (97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138)
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140. An interbody spinal fusion for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:
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a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said housing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing; and
a substantially hollow internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, a bottom, and an open interior between said top and said bottom, each of said top and said bottom of said rotatable member including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the mid-longitudinal axis of said rotatable member, said top and said bottom including at least one aperture therein in communication with said open interior of said rotatable member and with each other to permit for the growth of bone from vertebral body to vertebral body therethrough, said rotatable member being adapted to rotate at least in part within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position, at least a portion of said apertures of said rotatable member when in said deployed position being configured to generally align with at least a portion of said openings of said housing to allow bone to grow from adjacent vertebral body to adjacent vertebral body through housing implant and through said rotatable member. - View Dependent Claims (141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163)
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164. An interbody spinal fusion for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:
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a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said housing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing, said housing having a transverse cross section that is at least in part generally square along at least a portion of the mid-longitudinal axis of said housing; and
a substantially hollow internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, a bottom, and an open interior between said top and said bottom, each of said top and said bottom of said rotatable member including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the mid-longitudinal axis of said rotatable member, said top and said bottom including at least one aperture therein in communication with said open interior of said rotatable member and with each other to permit for the growth of bone from vertebral body to vertebral body therethrough, said rotatable member being adapted to rotate at least in part within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position. - View Dependent Claims (165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187)
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188. An interbody spinal fusion for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:
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a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a mid-longitudinal axis between said leading end and said trailing end of said housing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing; and
a substantially hollow internal rotatable member configured to be at least in part within said hollow interior of said housing, said rotatable member having a leading end, a trailing end, a mid-longitudinal axis between said leading end and said trailing end of said rotatable member, a top, a bottom, and an open interior between said top and said bottom, each of said top and said bottom of said rotatable member including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the mid-longitudinal axis of said rotatable member, said top and said bottom including at least one aperture therein in communication with said open interior of said rotatable member and with each other to permit for the growth of bone from vertebral body to vertebral body therethrough, said rotatable member being adapted to rotate at least in part within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position, said hollow interior of said housing being configured to limit the degree of rotation of said rotatable member within said housing. - View Dependent Claims (189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212)
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Specification