Expandable interbody fusion implant

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

• a first body member having a first surface and a second surface opposite one another along the first direction, and a first convex lateral sidewall and a first concave lateral sidewall that extend between first and second surfaces, the first body member defining a channel that extends at least partially through the first body between internal surfaces of the first convex lateral sidewall and the first concave lateral sidewall;
• a second body member adjacent to the first body member, the second body member having a first surface and a second surface opposite one another along the first direction, and having a second convex lateral sidewall and a second concave lateral sidewall between the first and second surfaces of the second body member;
• and
• an expandable element within the channel adapted to expand so as to move at least one of the first and second body members to move the implant from an initial configuration to an expanded configuration,
• wherein at least one of the first and second body members is movable in a direction away from the other one of the first and second body members as the implant moves from the initial configuration to the expanded configuration,
• wherein the first body member defines a recess and the second body member defines a mating feature, at least a portion of the mating feature within the recess in the initial configuration and the portion of the mating feature disposed outside the recess in the expanded configuration;
• and wherein the first convex lateral sidewall and first concave lateral sidewall are offset from one another alone a second direction, perpendicular to the first direction.