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The upper plate may have an upper lattice and the lower plate may have a lower lattice. The expansion mechanism can be configured such that activation of the expansion mechanism by the driver expands the upper plate and the lower plate away from each other along the cephalad-caudal axis. In addition, or alternatively, activation of the expansion mechanism may also move the first lattice and the second lattice away from each other along a medial-lateral axis by deforming the first lattice, the second lattice, the upper lattice, and the lower lattice.

Added by DJM 2 2021