Dynamic lordotic guard with movable extensions for creating an implantation space posteriorly in the lumbar spine
First Claim
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1. A guard for use in human interbody spinal surgery from across a disc space between two adjacent vertebral bodies, comprising:
- a body having a leading end and an opposite trailing end, said body having a first portion and a second portion in pivotal relationship to one another proximate said leading end between an open position and a closed position, said first and second portions having opposed interior portions being at least in part flat, respectively, said first and second portions defining an opening for providing a protected pathway to the disc space and the adjacent vertebral bodies, said opposed interior portions being adapted to guide therethrough a bone removal device sized to form an implantation space across the disc space and at least in part into the adjacent vertebral bodies; and
at least one disc space penetrating extension extending from said leading end of said body adapted for insertion at least in part into the disc space, said extension having a first portion extending from said first portion of said body, said first portion of said extension having a contact surface adapted to bear against one of the adjacent endplates of the adjacent vertebral bodies, said extension having a second portion extending from said second portion of said body, said second portion of said extension having a contact surface adapted to bear against the other of the adjacent endplates of the adjacent vertebral bodies, said contact surfaces of said first and second portions being in pivotal relationship to one another from an insertion position to a deployed position to move the adjacent vertebral bodies apart upon movement of said first and second portions of said body from the open position to the closed position, said contact surfaces of said first and second portions being pivotal about an axis that passes through at least a portion of the pathway to the disc space and the adjacent vertebral bodies.
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Abstract
A lordotic guard and method for guiding a bone removal device to form an implantation space in the human spine and, if desired, for inserting a spinal implant into the implantation space.
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Citations
127 Claims
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1. A guard for use in human interbody spinal surgery from across a disc space between two adjacent vertebral bodies, comprising:
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a body having a leading end and an opposite trailing end, said body having a first portion and a second portion in pivotal relationship to one another proximate said leading end between an open position and a closed position, said first and second portions having opposed interior portions being at least in part flat, respectively, said first and second portions defining an opening for providing a protected pathway to the disc space and the adjacent vertebral bodies, said opposed interior portions being adapted to guide therethrough a bone removal device sized to form an implantation space across the disc space and at least in part into the adjacent vertebral bodies; and
at least one disc space penetrating extension extending from said leading end of said body adapted for insertion at least in part into the disc space, said extension having a first portion extending from said first portion of said body, said first portion of said extension having a contact surface adapted to bear against one of the adjacent endplates of the adjacent vertebral bodies, said extension having a second portion extending from said second portion of said body, said second portion of said extension having a contact surface adapted to bear against the other of the adjacent endplates of the adjacent vertebral bodies, said contact surfaces of said first and second portions being in pivotal relationship to one another from an insertion position to a deployed position to move the adjacent vertebral bodies apart upon movement of said first and second portions of said body from the open position to the closed position, said contact surfaces of said first and second portions being pivotal about an axis that passes through at least a portion of the pathway to the disc space and the adjacent vertebral bodies. - 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)
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68. A guard for use in human interbody spinal surgery from across a disc space between two adjacent vertebral bodies, comprising:
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a body having an opening for providing a protected pathway to the disc space and the adjacent vertebral bodies, said opening having at least in part opposed interior portions being at least in part flat adapted to guide therethrough a bone removal device sized to form an implantation space across the disc space and at least in part into the adjacent vertebral bodies; and
at least one disc space penetrating extension extending from said body adapted for insertion at least in part into the disc space, said disc penetrating extension having a first portion having a contact surface adapted to bear against one of the adjacent endplates of the adjacent vertebral bodies and a second portion having a contact surface adapted to bear against the other of the adjacent endplates of the adjacent vertebral bodies, said contact surfaces of said first and second portions being rotatably articulating relative to one another between an insertion position and a deployed position to move the adjacent vertebral bodies apart, said contact surfaces of said first and second portions being pivotal about an axis that passes through at leas a portion of the pathway to the disc space and the adjacent vertebral bodies. - View Dependent Claims (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, 121, 122, 123, 124, 125, 126, 127)
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Specification