17/129,237

Paragraph Number

112

In certain embodiments, the expandable intervertebral implant 300 can include a first mesh 360 (of first wall 350), a second mesh 362 (of second wall 352), an upper mesh 370 and a lower mesh 380. The first mesh 360 and second mesh 362 may each have a particular pattern of pores or openings in the mesh, referred to herein as a first pattern. In addition, the opening 150 may comprise an elliptical cross-section with a predetermined height H. In such an embodiment, the first pattern and height of the elliptical cross-section of the opening 150 may be each selected such that activation of the driver 162 of the expansion mechanism 160 causes a predetermined increase in distance (Δ H = height 580’ – height 580) between the upper plate 110 and the lower plate 120.

Added by DJM 2 2021