An intervertebral cage configured to be inserted into an intervertebral disc space defined between first and second vertebral bodies, the intervertebral cage comprising: a cage body including an upper plate configured for placement against an endplate of the first vertebral body, and a lower plate configured for placement against an endplate of the second vertebral body, wherein the cage body defines a pair of upper slots and a pair of lower slots; a pair of upper anchors respectively disposed in the pair of upper slots and embedded in the cage body in a respective insertion position, the upper anchors configured to move from the insertion position to a deployed position whereby the upper anchors extend out from the cage body so as to pierce one of the first and second vertebral bodies, wherein each of the upper anchors includes an upper cantilever spring and an upper tooth that extends out from the upper cantilever spring; a pair of lower anchors respectively disposed in the pair of lower slots and embedded in the cage body in a respective insertion position, the lower anchors configured to move from the insertion position to a deployed position whereby the lower anchors extend out from the cage body so as to pierce the other of the first and second vertebral bodies, wherein each of the lower anchors includes a lower cantilever spring and a lower tooth that extends out from the lower cantilever spring; an actuator captured by the cage body, the actuator having upper and lower ramped surfaces, wherein the actuator is configured to be driven in an actuation direction from an initial position to an actuated position, which causes 1) the upper anchors to ride along the upper ramped surfaces, respectively, thereby driving the upper anchors to the deployed position, and 2) the lower anchors to ride along the lower ramped surfaces, respectively, thereby driving the lower anchors to the deployed position, wherein the actuator is captured in the housing as it moves from the initial position to the actuated position. a cage body including an upper plate configured for placement against an endplate of the first vertebral body, and a lower plate configured for placement against an endplate of the second vertebral body, wherein the cage body defines a pair of upper slots and a pair of lower slots; a pair of upper anchors respectively disposed in the pair of upper slots and embedded in the cage body in a respective insertion position, the upper anchors configured to move from the insertion position to a deployed position whereby the upper anchors extend out from the cage body so as to pierce one of the first and second vertebral bodies, wherein each of the upper anchors includes an upper cantilever spring and an upper tooth that extends out from the upper cantilever spring; a pair of lower anchors respectively disposed in the pair of lower slots and embedded in the cage body in a respective insertion position, the lower anchors configured to move from the insertion position to a deployed position whereby the lower anchors extend out from the cage body so as to pierce the other of the first and second vertebral bodies, wherein each of the lower anchors includes a lower cantilever spring and a lower tooth that extends out from the lower cantilever spring; an actuator captured by the cage body, the actuator having upper and lower ramped surfaces, wherein the actuator is configured to be driven in an actuation direction from an initial position to an actuated position, which causes 1) the upper anchors to ride along the upper ramped surfaces, respectively, thereby driving the upper anchors to the deployed position, and 2) the lower anchors to ride along the lower ramped surfaces, respectively, thereby driving the lower anchors to the deployed position, wherein the actuator is captured in the housing as it moves from the initial position to the actuated position.