A modular anterior lumbar interbody fusion device comprises a monolithic interbody fusion cage and a modular plate resiliently attached thereto. The cage includes an open architecture with top and bottom cross members and a pair of opposing arms projecting from respective side structures of the cage to define a pocket at the cage anterior end. The modular plate is received in the pocket and attached to the cage by resilient latches. The plate lies fully within the profile of the cage with the resilient latches lying fully within the thickness of the plate. The plate provides a structure to close the anterior portion of the modular cage after introduction of bone graft material while allowing for use with integrated fixation. Attachment features between the monolithic cage and modular plate are universal allowing for selection of various modular device configurations with minimal components.
