Self-broaching, rotatable, push-in interbody spinal fusion implant and method for deployment thereof
First Claim
1. An interbody spinal fusion implant for insertion across a disc space between adjacent vertebral bodies of a human spine, the implant comprising:
- a body having an insertion end, a trailing end, an upper wall, a lower wall, and opposed side walls, said body having a cross-section with a height measured between said upper and lower walls and a width measured between said side walls, said side walls intersecting said upper and lower walls at four junctions, a first pair of diagonally opposed junctions having a distance therebetween substantially the same as the height of said body, a second pair of diagonally opposed junctions having a distance therebetween greater than the distance between said first pair of diagonally opposed junctions; and
fins extending outwardly from said opposed upper and lower walls adapted to penetrate and extend within the vertebral endplates of the adjacent vertebral bodies upon rotation of the implant approximately 90 degrees from an initial insertion position to a final deployed position.
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Accused Products
Abstract
An interbody spinal fusion implant for insertion across a disc space between adjacent vertebral bodies of a human spine has a body two top side and two bottom side junctions, with at least a pair of diagonally opposed junctions having a distance therebetween that does not significantly exceed the implant body height. The implant also includes one or more bone penetrating protrusions extending outwardly from at least the upper and lower walls of the implant. The implant is inserted on its side between adjacent vertebral bodies and then rotated 90 degrees into place. The protrusions penetrate the endplates upon rotation, thereby securing the implant within the spine. The implant has at least one passage therethrough from the upper wall to the lower wall to promote fusion through the implant. Because of the specialized opposed junctions overdistraction between the adjacent vertebral bodies is avoided when the implant is rotated from an initial insertion position to a final deployed position. In one suggested implant set, two implants are rotated in opposite directions into their respective final deployed positions, and a third specialized implant is positioned therebetween to lock the three implants together along cooperating surfaces. A method for deploying the push-in implants is also disclosed.
212 Citations
105 Claims
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1. An interbody spinal fusion implant for insertion across a disc space between adjacent vertebral bodies of a human spine, the implant comprising:
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a body having an insertion end, a trailing end, an upper wall, a lower wall, and opposed side walls, said body having a cross-section with a height measured between said upper and lower walls and a width measured between said side walls, said side walls intersecting said upper and lower walls at four junctions, a first pair of diagonally opposed junctions having a distance therebetween substantially the same as the height of said body, a second pair of diagonally opposed junctions having a distance therebetween greater than the distance between said first pair of diagonally opposed junctions; and
fins extending outwardly from said opposed upper and lower walls adapted to penetrate and extend within the vertebral endplates of the adjacent vertebral bodies upon rotation of the implant approximately 90 degrees from an initial insertion position to a final deployed position. - 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)
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71. An interbody spinal implant set for insertion across a disc space between adjacent vertebral bodies of a human spine, the implant set comprising:
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a first implant comprising;
a body having an insertion end, a trailing end, opposed side walls, and upper and lower walls, said body having a cross-section with a height measured between said upper and lower walls and a width measured between said side walls, said side walls intersecting said upper and lower walls at four junctions, a first pair of diagonally opposed junctions having a distance therebetween substantially the same as the height of said body, a second pair of diagonally opposed junctions having a distance therebetween greater than the distance of said first pair of diagonally opposed junctions; and
fins extending outwardly from said opposed upper and lower walls adapted to penetrate the vertebral endplates of the adjacent vertebral bodies upon rotation of the implant in a first direction substantially 90 degrees from an initial insertion position to a final deployed position; and
a second implant comprising;
a body having an insertion end, a trailing end, opposed side walls, and upper and lower walls, said body having a cross-section with a height measured between said upper and lower walls and a width measured between said side walls, said side walls intersecting said upper and lower walls at four junctions, a first pair of diagonally opposed junctions having a distance therebetween less than the height of said body, a second pair of diagonally opposed junctions having a distance therebetween greater than the distance between said first pair of diagonally opposed junctions; and
fins extending outwardly from said opposed upper and lower walls adapted to penetrate the vertebral endplates of the adjacent vertebral bodies upon rotation of the implant in a second direction opposite said first direction and substantially 90 degrees from an initial insertion position to a final deployed position. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105)
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Specification