Patent ID: 8882835
Filing Date: 2014-11-11
Classification: A61F

Abstract:
1. A manufactured preformed interbody spinal fusion implant for insertion at least in part across a surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect, a posterior aspect, and to each side a lateral aspect, said implant comprising: a leading end for insertion into the disc space, an opposite trailing end, a lateral side and an opposite medial side, said sides connecting said leading and trailing ends, said implant having a length between said leading end and said trailing end and a maximum width as measured from said lateral side to said medial side transverse to the length of said implant; opposed arcuate portions adapted for placement toward and into the adjacent vertebral bodies, said implant having a maximum height between said opposed arcuate portions defining an implant maximum height greater than the surgically corrected height of the disc space into which said implant is to be implanted, the maximum height of said implant being transverse to the maximum width of said implant, said opposed arcuate portions each extending from said lateral side to said medial side along the maximum width of said implant; and a mid-longitudinal axis passing through said leading and trailing ends, the mid-longitudinal axis being perpendicular to and bisecting each of the maximum height and the maximum width of said implant into equal parts, said opposed arcuate portions each including a convex portion across the mid-longitudinal axis of said implant in a plane transverse to the mid-longitudinal axis of said implant, said opposed arcuate portions forming part of the same circle, the circle having a diameter substantially equal to said implant maximum height, each of said opposed arcuate portions having at least one opening, said openings being in communication with one another to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said implant, said trailing end having an exterior surface, a majority of said exterior surface being linear from one of said opposed arcuate portions to the other of said opposed arcuate portions across the maximum height of said implant, said trailing end including a curved portion in a plane parallel to the mid-longitudinal axis of said implant, said curved portion extending from said medial side and across the mid-longitudinal axis of said implant, said curved portion adapted to conform to the peripheral contour of the vertebral bodies adjacent the disc space in which said implant is implanted, the length of said implant having between said leading end and said trailing end adapted to permit at least a portion of said implant proximate said trailing end and at least a portion of said implant proximate said leading end between said medial side and the mid-longitudinal axis to each overlie at least the apophyseal rim of the adjacent vertebral bodies when said implant is implanted in the disc space, said implant having a junction of said lateral side and said leading end and a junction of said lateral side and said trailing end not substantially protruding from the vertebral bodies when implanted in the disc space.