Spinal implant surface configuration
First Claim
1. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
- a leading end for introduction of said spinal implant into the spine, an opposite trailing end, and spaced apart sides therebetween;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement in engagement with the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a plurality of bone engaging structures formed on said upper and lower surfaces, at least one of said bone engaging structures comprising surface projections having at least one forward facing facet directed at least in part toward said leading end and at least one rearward facet directed at least in part toward said trailing end, each of said forward facet and rearward facet having a length and a slope, the length of said forward facet being longer than said rearward facet, the slope of said rearward facet being steeper than the slope of said forward facet, said surface projections having opposed side facets directed generally toward said sides of said implant, said side facets located between said forward facet and said rearward facet of said surface projections, said side facets converging toward each other in a direction away from the base of said projections.
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Accused Products
Abstract
The present invention is a specialized implant having opposed surfaces for engaging each of the vertebral bodies adjacent a disc space into which the implant is implanted. The surface comprises arrayed projections having at least one forward facing facet directed at least in part toward the leading end of the implant and at least one rearward portion directed at least in part toward the opposite trailing end of the implant. Each of the forward facet and rearward portion has a length and a slope. The length of the forward facet is longer than the length of the rearward facet. The slope of the rearward facet is steeper than the slope of the forward facet. The surface projections also have opposed side facets directed generally toward the sides of the implant. The side facets are located between the forward facet and rearward facet and converge toward each other in a direction away from the base of the surface projections. The surface may also include projections having left and right forward side facets and a rearward facet. The surface further may include projections having left and right rearward side facets and a forward facet.
203 Citations
202 Claims
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1. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for introduction of said spinal implant into the spine, an opposite trailing end, and spaced apart sides therebetween;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement in engagement with the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a plurality of bone engaging structures formed on said upper and lower surfaces, at least one of said bone engaging structures comprising surface projections having at least one forward facing facet directed at least in part toward said leading end and at least one rearward facet directed at least in part toward said trailing end, each of said forward facet and rearward facet having a length and a slope, the length of said forward facet being longer than said rearward facet, the slope of said rearward facet being steeper than the slope of said forward facet, said surface projections having opposed side facets directed generally toward said sides of said implant, said side facets located between said forward facet and said rearward facet of said surface projections, said side facets converging toward each other in a direction away from the base of said projections. - 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)
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57. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for introduction of said spinal implant into the spine, an opposite trailing end, spaced apart sides therebetween, and a longitudinal axis passing through said leading and trailing ends;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement toward the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a first plurality of bone engaging structures formed on said upper and lower surfaces, said first plurality of bone engaging structures comprising surface projections having at least one forward facing facet directed at least in part toward said leading end and at least one rearward portion directed at least in part toward said trailing end, said forward facet and said rearward portion having a length and a slope, the length of said forward facet being longer than the length of said rearward portion, the slope of said rearward portion being steeper than the slope of said forward facet, said projections having opposed side facets between said forward facet and said rearward portion, said side facets having at least a first portion in a plane at an angle to the longitudinal axis of said implant. - View Dependent Claims (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, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120)
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121. A method for forming an interbody spinal implant having a plurality of bone engaging structures for insertion between adjacent vertebral bodies of a human spine, the method comprising the steps of:
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providing the implant comprising a leading end for introduction of the spinal implant into the spine, an opposite trailing end, and spaced apart sides therebetween, opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement toward the bone of one of the vertebral bodies and said opposite lower surface adapted for placement toward the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
forming a plurality of surface projections as part of the upper and lower surfaces of the implant, the surface projections being formed to have at least one forward facet directed at least in part toward the leading end and at least one rearward facet directed at least in part toward the trailing end, said forward facet and rearward facet being formed to have a length and a slope, the length of said forward facet being longer than said rearward facet, the slope of said rearward facet being steeper than the slope of said forward facet, said surface projections being formed to have opposed side facets directed generally toward said sides of the implant, said side facets located between said forward facet and said rearward facet of said surface projections, said side facets converging toward each other in a direction away from the base of said projections. - View Dependent Claims (122, 123, 124, 125, 137)
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126. A method for forming an interbody spinal implant having an exterior surface with a plurality of bone engaging structures for insertion between adjacent vertebral bodies of a human spine, the method comprising the steps of:
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providing the implant comprising a leading end for introduction of the spinal implant into the spine, an opposite trailing end, spaced apart sides therebetween, and a longitudinal axis passing through the leading and trailing ends, opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement toward the bone of one of the vertebral bodies and said opposite lower surface adapted for placement toward the bone of the other of the vertebral bodies when the implant is placed between the adjacent vertebral bodies; and
forming surface projections as part of the upper and lower surfaces of the implant, said surface projections having at least one forward facet directed at least in part toward the leading end and at least one rearward facet directed at least in part toward the trailing end, said forward facet and said rearward facet having a length and a slope, the length of said forward facet being longer than the length of said rearward facet, the slope of said rearward facet being steeper than the slope of said forward facet, said projections having opposed side facets between said forward facet and said rearward facet, said side facets having at least a first portion in a plane at an angle to the longitudinal axis of the implant. - View Dependent Claims (127, 128, 129, 130)
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131. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end, an opposite trailing end, and spaced apart opposite sides therebetween;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement in engagement with the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a plurality of bone engaging structures formed on said upper and lower surfaces, at least one of said bone engaging structures comprising surface projections having at least one forward facing facet directed at least in part toward one of said spaced apart opposite sides and at least one rearward facet directed at least in part toward the other one of said spaced apart opposite sides, each of said forward facet and rearward facet having a length and a slope, the length of said forward facet being longer than said rearward facet, the slope of said rearward facet being steeper than the slope of said forward facet, said surface projections having opposed side facets directed generally toward said leading and trailing ends, respectively, said side facets located between said forward facet and said rearward facet of said surface projections, said side facets converging toward each other in a direction away from the base of said projections. - View Dependent Claims (132, 133, 134, 135, 136, 138, 139, 140, 141, 142, 143, 144, 145)
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146. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for introduction of said spinal implant into the spine, an opposite trailing end, spaced apart sides therebetween, and a longitudinal axis passing through said leading and trailing ends;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement toward the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a plurality of bone engaging structures formed on said upper and lower surfaces, said plurality of bone engaging structures comprising surface projections having at least a left forward side facet and a right forward side facet directed at least in part toward said leading end and said sides, respectively, and a single rearward facet directed at least in part toward said trailing end, said left and right forward side facets having at least a first portion in a plane at an angle to the longitudinal axis of said implant. - View Dependent Claims (147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174)
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175. An interbody spinal implant for insertion between adjacent vertebral bodies of a human spine, said implant comprising:
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a leading end for introduction of said spinal implant into the spine, an opposite trailing end, spaced apart sides therebetween, and a longitudinal axis passing through said leading and trailing ends;
opposite upper and lower surfaces between said leading and trailing ends and said spaced apart sides, said upper surface adapted for placement in engagement with the bone of one of the vertebral bodies and said opposite lower surface adapted for placement toward the bone of the other of the vertebral bodies when said implant is placed between the adjacent vertebral bodies; and
a plurality of bone engaging structures formed on said upper and lower surfaces, said third plurality of bone engaging structures comprising surface projections having at least a left rearward side facet and a right rearward side facet directed at least in part toward said trailing end and said sides, respectively, and a single forward facet directed at least in part toward said leading end, said left and right rearward side facets having at least a first portion in a plane at an angle to the longitudinal axis of said implant. - View Dependent Claims (176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202)
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Specification