Expandable lordotic interbodies and related methods

An expandable interbody comprising:

• a superior shell having a proximal end and a distal end, the superior shell defining a superior surface extending from the proximal end to the distal end configured to engage an inferior surface of a first vertebral body, the superior shell further comprising a pair of side walls, wherein at least one side wall includes a first angled slot extending distally and away from the superior surface along the side wall;
• an inferior shell having a proximal end and a distal end, the inferior shell defining an inferior surface extending from the proximal end to the distal end configured to engage a superior surface of a second vertebral body, the inferior shell further comprising a pair of side walls, wherein at least one side wall includes a second angled slot extending distally and away from the inferior surface along the side wall;
• and
• a control assembly situated between the superior and inferior shells, the control assembly comprising interlocking proximal and distal cages and an adjustment screw defining a longitudinal axis, the proximal cage comprising proximal and distal bores, the distal cage comprising a proximal bore, and the adjustment screw extending through the distal bore of the proximal cage;
• wherein a proximal portion of the proximal cage includes a pair of superior hinge points about which the superior shell pivots and a pair of inferior hinge points about which the inferior shell pivots;
• wherein the distal cage includes a first lateral projection configured to engage the first angled slot and a second lateral projection configured to engage the second angled slot;
• and
• wherein rotation of the adjustment screw causes the distal cage to translate along the longitudinal axis, which in turn causes the respective distal ends of the superior and inferior shells to move apart from an unexpanded state to an expanded state.