Patent ID: 8641763
Filing Date: 2014-02-04
Classification: A61F

Abstract:
1. A spinal fusion apparatus comprising: a cage body configured to be inserted between two vertebral bodies, wherein the cage body has a plurality of internal sidewalls that define a cavity that extends vertically through the cage body; and a first internal compression member comprising a first movable sidewall which defines at least one side of the cavity, and which is movable in a lateral direction from a first position located inside the cavity to a second position located inside the cavity such that a space within the cavity is reduced when the movable sidewall is at the second position; and a second internal compression member comprising a second movable sidewall which defines at least one side of the cavity, wherein the second movable sidewall is movable in a second lateral direction from a third position located inside the cavity to a fourth position located in the cavity such that the space within the cavity is reduced when the second movable sidewall is at the fourth position; wherein when the first moveable sidewall is in the first position and the second movable sidewall is in the third position, fusion material is disposed in the cavity, and when the fusion material is disposed in the cavity, the first compression mechanism moves the first movable sidewall laterally to the second position and the second compression mechanism moves the second movable sidewall laterally to the fourth position, in order to compress and compact the fusion material within a space defined by the cavity and the two vertebral bodies.