Expandable interbody implant and breakoff screw

An expandable implant movable between a contracted position and an expanded position, comprising:

• an expandable body extending from a proximal end to a distal end in a proximal-to-distal direction and extending from a first lateral side to a second lateral side in a widthwise direction, the expandable body being defined by a superior endplate and an inferior endplate that are hingedly connected;
• the superior endplate comprises a first core having screw slot and a distal engagement surface;
• the inferior endplate comprises a second core having a proximal engagement surface and a threaded screw aperture;
• and
• a threaded breakoff screw having a fracture surface for separating the threaded breakoff screw, the threaded breakoff screw being disposed in the threaded screw aperture and movable between a locked position and an unlocked position;
• wherein the threaded breakoff screw comprises an elongate body extending in a proximal to distal direction along a longitudinal axis, the elongate body being defined by a proximal portion and a distal portion separated therebetween by a recessed fracture surface,
• wherein the proximal portion includes a first drive feature and a first flexible tang and a second flexible tang defining a discontinuous cylindrical shaped aperture therebetween configured to facilitate retaining of the proximal portion of the threaded breakoff screw by a driver insert in the first drive feature once the proximal portion is broken off, and
• wherein, in the locked position, the threaded breakoff screw urges the distal engagement surface of the first core into direct contact with the proximal engagement surface of the second core.