Patent ID: 8814940
Filing Date: 2014-08-26
Classification: A61F

Abstract:
1. A spinal fusion implant of non-bone construction positionable within an interbody space between a first vertebra and a second vertebra, said implant comprising: an upper surface including anti-migration elements to contact said first vertebra when said implant is positioned within the interbody space, a lower surface including anti-migration elements to contact said second vertebra when said implant is positioned within the interbody space, a distal wall, a proximal wall, a first sidewall, and a second sidewall generally opposite from the first sidewall, wherein the first sidewall intersects the proximal wall and the distal wall, wherein the second sidewall intersects the proximal wall and the distal wall, wherein the implant defines a longitudinal axis extending between the proximal wall and the distal wall, wherein said distal wall, proximal wall, first sidewall, and second sidewall comprise a radiolucent material, wherein the proximal wall includes a threaded aperture axially aligned with the longitudinal axis for releasably mating with an inserter tool, wherein the first and second sidewalls each include outwardly bowed surface portions that are outwardly bowed away from said longitudinal axis, wherein a convex curvature of the outwardly bowed surface portion of the first sidewall is symmetric with a convex curvature of the outwardly bowed surface portion of the second sidewall relative to said longitudinal axis; wherein said anti-migration elements of the upper surface include generally parallel ridges that extend along the first and second sidewalls, wherein said anti-migration elements of lower surface include generally parallel ridges along the first and second sidewalls, and wherein the upper and lower surfaces are free of parallel ridges along the proximal wall and the distal wall; wherein said implant has a longitudinal length greater than 40 mm extending from a proximal end of said proximal wall to a distal end of said distal wall, wherein said implant has a maximum lateral width extending from the first sidewall to the second sidewall along a medial plane that is generally perpendicular to said longitudinal axis, said implant has a height extending from said upper surface to said lower surface and extending generally perpendicular to said longitudinal length and said maximum lateral width, wherein said longitudinal length is greater than said maximum lateral width, and said maximum lateral width is greater than said height; at least a first fusion aperture defined by the implant and extending through the implant from said upper surface to said lower surface and configured to permit bone growth between the first vertebra and the second vertebra when said implant is positioned within the interbody space, said first fusion aperture having: a longitudinal aperture length extending generally parallel to the longitudinal length of said implant, and a lateral aperture width extending between said first sidewall to said second sidewall, wherein the longitudinal aperture length is greater than the lateral aperture width; and first, second, third, and fourth radiopaque markers positioned in said radiolucent material, each of said first, second, third, and fourth radiopaque markers including an elongate and cylindrical body oriented generally parallel to said height of the implant, and wherein the first radiopaque marker is positioned in said distal wall, wherein the second radiopaque marker is positioned in said proximal wall, wherein the third radiopaque marker is positioned in the first sidewall and extends in the medial plane, wherein the fourth radiopaque marker is positioned in the second sidewall and extends in the medial plane.