Radially expanding interbody spinal fusion implants, instrumentation, and method of insertion
First Claim
Patent Images
1. An interbody spinal fusion implant for implantation from at least in part an anterior approach at least in part within and across the height of a disc space between two adjacent vertebral bodies of an adult human spine, said implant comprising:
- a body having a leading end for insertion first into the disc space, a trailing end opposite said leading end, and a mid-longitudinal axis along the length of said body, said body having a base proximate said leading end, an upper portion adapted to contact one of the adjacent vertebral bodies, a lower portion opposite said upper portion adapted to contact another one of the adjacent vertebral bodies, and at least one side portion between said upper and lower portions, each of said upper, lower, and side portions extending from said base of said body and being spaced apart from one another to form a hollow interior therebetween, said hollow interior being configured to hold at least some bone growth promoting material therein, said upper and lower portions configured to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said body of said implant, each of said upper, lower, and side portions configured to move at least in part in a direction away from the mid-longitudinal axis of said body allowing for expansion of the height and at least a portion of the width of said body, said upper, lower, and side portions having a collapsed position relative to one another allowing for a collapsed height and width of said body and an expanded position relative to one another allowing for an expanded height and width of said body, the expanded height and width of said body being greater than the collapsed height and width of said body, respectively; and
an expander at least in part within said hollow interior, said expander configured to contact an instrument adapted to be inserted through said trailing end of said body to move said expander from a position proximate said trailing end when said body is in the collapsed position away from said trailing end and toward said base of said body to place said body in the expanded position, said expander adapted to contact and to move said upper, lower, and side portions away from the mid-longitudinal axis of said body, said expander configured to expand the width of said body on one side by contacting only one of said side portions of said body, said upper, lower, and side portions of said body adapted to cooperatively engage said expander to locate said expander at a location along the length of said body between and away from each of said leading and trailing ends and to resist dislodgment of said expander from that location when said implant is in use, said expander adapted to hold at least a portion of said upper, lower, and side portions apart so as to maintain the expanded height and width of said body and to resist the collapse of said body to the collapsed body height and width when said body is in the expanded position.
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Abstract
Interbody spinal fusion implants being at least in part radially expandable at one of the leading or trailing ends to expand both the height and at least a portion of the width of the implant, and instruments and methods for inserting the implants into an implantation space in the spine are disclosed.
458 Citations
96 Claims
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1. An interbody spinal fusion implant for implantation from at least in part an anterior approach at least in part within and across the height of a disc space between two adjacent vertebral bodies of an adult human spine, said implant comprising:
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a body having a leading end for insertion first into the disc space, a trailing end opposite said leading end, and a mid-longitudinal axis along the length of said body, said body having a base proximate said leading end, an upper portion adapted to contact one of the adjacent vertebral bodies, a lower portion opposite said upper portion adapted to contact another one of the adjacent vertebral bodies, and at least one side portion between said upper and lower portions, each of said upper, lower, and side portions extending from said base of said body and being spaced apart from one another to form a hollow interior therebetween, said hollow interior being configured to hold at least some bone growth promoting material therein, said upper and lower portions configured to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said body of said implant, each of said upper, lower, and side portions configured to move at least in part in a direction away from the mid-longitudinal axis of said body allowing for expansion of the height and at least a portion of the width of said body, said upper, lower, and side portions having a collapsed position relative to one another allowing for a collapsed height and width of said body and an expanded position relative to one another allowing for an expanded height and width of said body, the expanded height and width of said body being greater than the collapsed height and width of said body, respectively; and an expander at least in part within said hollow interior, said expander configured to contact an instrument adapted to be inserted through said trailing end of said body to move said expander from a position proximate said trailing end when said body is in the collapsed position away from said trailing end and toward said base of said body to place said body in the expanded position, said expander adapted to contact and to move said upper, lower, and side portions away from the mid-longitudinal axis of said body, said expander configured to expand the width of said body on one side by contacting only one of said side portions of said body, said upper, lower, and side portions of said body adapted to cooperatively engage said expander to locate said expander at a location along the length of said body between and away from each of said leading and trailing ends and to resist dislodgment of said expander from that location when said implant is in use, said expander adapted to hold at least a portion of said upper, lower, and side portions apart so as to maintain the expanded height and width of said body and to resist the collapse of said body to the collapsed body height and width when said body is in the expanded 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)
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54. A method for inserting an interbody spinal fusion implant from at least in part an anterior approach at least in part within and across the height of a disc space between two adjacent vertebral bodies of an adult human spine, the method comprising:
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providing the spinal implant having a body with a leading end for insertion first into the disc space, a trailing end opposite the leading end, a mid-longitudinal axis, upper and lower portions, and at least one side portion, each of the upper, lower, and side portions extending from the leading end of the body, a hollow interior between said upper and lower portions, and an expander for expanding the height and at least a portion of the width of the body; preparing an implantation space to receive the implant from an anterior approach to the spine; inserting the implant at least in part into the implantation space; engaging the instrument to the free end of at least two of the upper, lower, and side portions proximate the trailing end of the implant and inserting a portion of the instrument through the trailing end of the implant; and moving the expander from a position proximate the trailing end toward the leading end of the body along at least a portion of the length of the body of the implant to move the upper, lower, and side portions in a direction away from the mid-longitudinal axis of the body of the implant to expand the height and at least a portion of the width of the body of the implant. - View Dependent Claims (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)
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91. A system for use in human spinal surgery, said system comprising:
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a spinal implant having an expander for expanding the height and at least a portion of the width of the implant from a collapsed position to an expanded position, said implant having upper, lower, and side portions comprising a plurality of arms separated by spaces and a hollow interior between said upper, lower, and side portions; and an inserter for inserting said spinal implant at least in part within a disc space between two adjacent vertebral bodies of the human spine, said inserter having a leading end and a trailing end opposite said leading end, said leading end of said inserter having a plurality of spaced apart portions, said inserter including a projection extending from said leading end of said inserter and between said spaced apart portions, said spaced apart portions of said inserter configured to fit in the spaces between said arms of said spinal implant and at least a portion of said projection being configured fit at least in part within said hollow interior of said implant and to bear against at least one of said spaced apart portions to cooperatively engage said inserter to said implant. - View Dependent Claims (92, 93, 94)
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95. An interbody spinal fusion implant for implantation from at least in part an anterior approach at least in part within and across the height of a disc space between two adjacent vertebral bodies of an adult human spine, said implant comprising:
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a body having a leading end for insertion first into the disc space, a trailing end opposite said leading end, and a mid-longitudinal axis along the length of said body, said body having a base proximate said leading end, an upper portion adapted to contact one of the adjacent vertebral bodies, a lower portion opposite said upper portion adapted to contact another one of the adjacent vertebral bodies, and at least one side portion between said upper and lower portions, each of said upper, lower, and side portions extending from said base of said body and terminating in a free end proximate said trailing end of said implant, each of said upper, lower, and side portions being spaced apart from one another across the mid-longitudinal axis to form a hollow interior and being spaced apart from one another along a perimeter of said trailing end to form slots therebetween, said implant being adapted to receive an instrument configured to be inserted into said hollow interior proximate said trailing end and configured to be inserted into at least one of said slots to cooperatively engage at least two of said upper, lower, and side portions proximate said free ends, said hollow interior being configured to hold at least some bone growth promoting material therein, said upper and lower portions configured to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said body of said implant, each of said upper, lower, and side portions configured to move at least in part in a direction away from the mid-longitudinal axis of said body allowing for expansion of the height and at least a portion of the width of said body, said upper, lower, and side portions having a collapsed position relative to one another allowing for a collapsed height and width of said body and an expanded position relative to one another allowing for an expanded height and width of said body, the expanded height and width of said body being greater than the collapsed height and width of said body, respectively; and an expander at least in part within said hollow interior, said expander configured to contact the instrument to move said expander from a position proximate said trailing end when said body is in the collapsed position away from said trailing end and toward said base of said body to place said body in the expanded position, said expander adapted to contact and to move said upper, lower, and side portions away from the mid-longitudinal axis of said body, said expander configured to expand the width of said body on one side by contacting only one of said side portions of said body, said upper, lower, and side portions of said body adapted to cooperatively engage said expander to locate said expander at a location along the length of said body between and away from each of said leading and trailing ends and to resist dislodgment of said expander from that location when said implant is in use, said expander adapted to hold at least a portion of said upper, lower, and side portions apart so as to maintain the expanded height and width of said body and to resist the collapse of said body to the collapsed body height and width when said body is in the expanded position.
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96. A method for inserting an interbody spinal fusion implant from at least in part an anterior approach at least in part within and across the height of a disc space between two adjacent vertebral bodies of an adult human spine, the method comprising:
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providing the spinal implant having a body with a leading end for insertion first into the disc space, a trailing end opposite the leading end, a mid-longitudinal axis, upper and lower portions, and at least one side portion, each of the upper, lower, and side portions extending from the leading end of the body, a hollow interior between said upper and lower portions, and an expander for expanding the height and at least a portion of the width of the body; preparing an implantation space to receive the implant from an anterior approach to the spine; inserting the implant at least in part into the implantation space; moving the expander from a position proximate the trailing end toward the leading end of the body along at least a portion of the length of the body of the implant to move the upper, lower, and side portions in a direction away from the mid-longitudinal axis of the body of the implant to expand the height and at least a portion of the width of the body of the implant; and moving the side portion at only one side of the implant to expand the width of the implant.
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Specification