Expandable inter vertebral implant

An expandable intervertebral implant comprising:

• an upper plate comprising an upper mesh, a first upper side, and a second upper side;
• a lower plate comprising a lower mesh, a first lower side, and a second lower side;
• a first wall that connects the first upper side of the upper plate to the first lower side of the lower plate, the first wall comprising a first mesh;
• a second wall that connects the second upper side of the upper plate to the second lower side of the lower plate, the second wall comprising a second mesh;
• an opening having a longitudinal axis between the upper plate, the lower plate, the first wall, and the second wall and comprising internal threads about the longitudinal axis;
• and
• an expansion mechanism comprising a driver and a screw member comprising a shank comprising threads that engage the internal threads within the opening, the screw member having a diameter selected such that rotation of the screw member about the longitudinal axis, by activation of the driver, moves the upper plate and the lower plate away from each other along a cephalad-caudal axis-by expanding the first mesh and the second mesh and moves the first wall and the second wall away from each other along a medial-lateral axis by expanding the upper mesh and the lower mesh;
• wherein the driver of the expansion mechanism comprises a head of the screw member connected to a proximal end of the shank;
• and
• wherein the screw member comprises a tapered end connected to a distal end of the shank and the screw member comprises a cross-sectional diameter greater than a height of the opening.

An expandable intervertebral implant comprising:

• an upper plate comprising an upper lattice, a first upper side, and a second upper side;
• a lower plate comprising a lower lattice, a first lower side and a second lower side;
• a first lattice that connects the first upper side of the upper plate to the first lower side of the lower plate;
• a second lattice that connects the second upper side of the upper plate to the second lower side of the lower plate;
• an opening having internal threads about a longitudinal axis between the upper plate, the lower plate, the first lattice, and the second lattice;
• and
• a screw member comprising a shank comprising threads that engage the internal threads within the opening, the screw member having a diameter such that rotation of the screw member about the longitudinal axis moves the upper plate and the lower plate away from each other by deforming the first lattice and the second lattice and moves the first lattice and the second lattice away from each other by deforming the upper lattice and the lower lattice.