US Patent 7749274 Intervertebral cage with medial fixing plate

An intervertebral cage for treating degeneration of the spine includes a block, an anchor member with a pivot and two blades secured to the pivot, a device for mounting the pivot to turn relative to the block and a hole in the block, a slot in the block, where the slot shares a common portion with the hole for containing the pivot, and a device for associating the pivot in rotation with the block in the common portion in such a manner that when the pivot is turned, the anchor member takes up a first position in which the blade is fully contained in the slot and a second position in which a portion of the end of the blade emerges from the slot.