An interbody fusion cage comprised of two support elements that separate after insertion into the interbody space to form a pocket into which graft material may be inserted. The expansion of the support elements deploys a band between the two support elements to further insulate the pocket into which the graft material is inserted, thereby holding it securely in place. The band may be formed of a flexible material so that it can fold to fit into a space between the support elements prior to separation of same.
