Interbody implant and method

1 . An interbody implant for fusion of vertebrae of a patient, the interbody implant comprising:

an anterior side, a posterior side, a cephalad side, a caudal side, a right side, and a left side;

a proximal end and a distal end;

a graft opening configured so that the anterior side, the posterior side, the right side, and the left side circumscribe the graft opening;

a plurality of pillars configured to provide structural support;

a mesh comprising a first set of pores having a first diameter based on a first relationship to a first locus and a second set of pores having a second diameter based on a second relationship to the first locus; and

wherein:

at least one of the anterior side, posterior side, left side, right side, cephalad side, and caudal side comprise the mesh;

the plurality of pillars are connected by the mesh; and

each of the plurality of pillars is positioned within the interbody implant so that the mesh extends between each of the plurality of pillars and the anterior side, the posterior side, the right side, the left side, and the graft opening.

2 . The interbody implant of claim 1 , wherein the mesh comprises a mesh surface formed within a gyroid triply periodic minimal surface (TPMS) field, the mesh surface volumized and wherein the mesh comprises pores that vary in diameter based on a position of a pore in relation to the first locus between a maximum pore size and a minimum pore size.

3 . The interbody implant of claim 1 , further comprising a third set of pores having diameters that vary between the first diameter and the second diameter.

4 . The interbody implant of claim 1 , wherein the mesh forms at least one of the anterior side, the posterior side, the left side, and the right side and the first locus intersects the mesh.

5 . The interbody implant of claim 1 , wherein the first relationship and the second relationship each comprise a distance of a set of pores from the first locus and wherein the mesh forms the posterior side and one of the left side and the right side and the first locus intersects the posterior side and the one of the left side and the right side.

6 . The interbody implant of claim 1 , wherein the first locus intersects the posterior side and the left side at a posterior side midpoint and at a left side midpoint.

7 . The interbody implant of claim 1 , wherein:

the first locus comprises an X shape; and

wherein the first locus intersects a posterior side midpoint, an anterior side midpoint, a left side midpoint, and a right side midpoint.

8 . The interbody implant of claim 1 , wherein the mesh comprises a second locus and the pores of the mesh vary in diameter based on a position of a pore in relation to the first locus and the second locus.

9 . The interbody implant of claim 1 , wherein:

the posterior side is connected to the left side at a first corner, the left side is connected to the anterior side at a second corner, the anterior side is connected to the right side at a third corner, and the right side is connected to the posterior side at a fourth corner such that posterior side, left side, anterior side, and right side form an implant profile in a caudal view;

the plurality of pillars comprises four pillars;

each of the plurality of pillars is positioned in one of the first corner, the second corner, the third corner, and the fourth corner of the interbody implant;

the plurality of pillars cooperate to define a cross-section that forms a pillars profile smaller than the implant profile;

the graft opening that extends through the interbody implant from the cephalad side to the caudal side; and

one or more of the plurality of pillars is positioned between two of the anterior side, left side, right side, and posterior side.