Expandable interbodies and related methods

An expandable interbody comprising:

• a control assembly;
• a superior shell engaged with the control assembly, the superior shell having a superior surface at least partially defined by a superior plane;
• and
• an inferior shell engaged with the control assembly, the inferior shell having an inferior surface at least partially defined by an inferior plane that is angled relative to the superior plane such that the superior and inferior planes converge;
• wherein:
• the control assembly is positioned between the superior and inferior shells,
• the control assembly is configured to move the superior and inferior shells from a collapsed configuration to an expanded configuration where an angle between the superior and inferior planes is maintained constant when the control assembly moves the superior and inferior shells from the collapsed configuration to the expanded configuration,
• the control assembly comprises:
• an adjustment screw defining a first axis;
• a proximal cage threadingly engaged to the adjustment screw;
• and a distal cage secured to the adjustment screw;
• wherein the proximal and distal cages are interlocking, wherein each of the proximal and distal cages comprises a superior lateral projection and an inferior lateral projection, and wherein rotation of the adjustment screw causes the proximal and distal cages to translate relative to each other along the first axis,
• the superior and inferior shells each define a distal end, a proximal end, a first lateral side with a first lateral slot, and a second lateral side with a second lateral slot the inferior lateral projections are each configured to engage with the first and second lateral slots of the inferior shell and the superior lateral projections are each configured to engage with the first and second lateral slots of the superior shell;
• and translation of the proximal and distal cages causes each lateral projection to slide along each respective slot to facilitate the expansion or the collapse of the superior and inferior shells, and
• the convergence of the superior and inferior planes is toward the proximal end and the first lateral side of the superior and inferior shells.