Expandable trials

An intervertebral implant inserter, comprising:

• a) an elongated central body having a distal end, a proximal end opposite the distal end, an outer surface that extends from the proximal end to the distal end along a distal direction, and a longitudinal throughbore therethrough,
• b) an upper blade and a lower blade, each of the upper and lower blades having a distal end portion and a base portion, the base portion of each of the upper and lower blades pivotally coupled to the elongated central body,
• c) a shaft that extends through the throughbore along a longitudinal axis, wherein the shaft is advanceable within the throughbore along the distal direction and rotatable about the longitudinal axis, the shaft having a distal end forming a pusher having an acicular transverse cross-section, such that rotation of the shaft about the longitudinal axis causes the pusher to rotate about the longitudinal axis from a first height to a second height greater than the first height, thereby distracting a disc space;
• and
• d) an upper endplate and a lower endplate detachably connected to the distal end portion of the upper and lower blades, respectively.