Patent ID: 8518119
Filing Date: 2013-08-27
Classification: A61F

Abstract:
1. An intervertebral implant for deployment between an inferior endplate of a superior vertebral body and a superior endplate of an inferior vertebral body of a spinal column, the implant comprising an implant structure including at least one implant element, said implant structure providing an upper fixation surface for fixation to the inferior endplate of the superior vertebral body, said upper fixation surface being a closed surface including a first posterior bone contact region and a second anterior bone contact region, said second bone contact region being higher in an axial direction than said first bone contact region, wherein a transition from said first bone contact region to said second bone contact region has a stepped form including at least two steps, upper contact surfaces of each of said steps being arranged to provide non-migratory support against loading in a primary load-bearing direction, said stepped form defining an effective lordosis plane inclined relative to said primary load-bearing direction, and wherein said upper fixation surface has a generally concave form in a lateral-lateral direction, and wherein said upper fixation surface further features a press-fit anchoring projection, said press-fit anchoring projection having an axial dimension smaller than both its anterior-posterior and its lateral-lateral dimensions, and being formed with two opposing faces inclined to provide a wedge angle of between 1 degree and 30 degrees.