Expandable fixation assemblies

An expandable intervertebral implant assembly configured to be implanted into an intervertebral space between first and second vertebrae that are spaced from one another along a first direction, the assembly comprising:

• an intervertebral implant comprising an implant body having upper and lower surfaces configured to face the first and second vertebrae, respectively, the upper and lower surfaces spaced from one another along the first direction such that at least a portion of the implant body is solid from the upper surface to the lower surface, the implant body further having first and second ends that are spaced from one another along a second direction, perpendicular to the first direction, the implant body defining at least a first bore that extends into the first end towards the second end along a bore axis;
• and
• at least a first expandable fixation assembly disposed within the first bore, wherein the first expandable fixation assembly includes a first expansion member and includes a first fixation member that defines an axial bore, the first expansion member being disposed within the axial bore of the first fixation member, wherein:
• the axial bore of the first fixation member has an inner dimension, and the first expansion member has an outer dimension that is greater than the inner dimension such that, when the first expansion member is biased through the axial bore of the first fixation member, the first expansion member causes the first fixation member to expand;
• and
• the assembly is configured such that, when the first expansion member is biased through the first bore along the bore axis, the first expansion member causes the expandable intervertebral implant assembly to expand along the first direction and engage with the first and second vertebrae.