Lordotic interbody spinal fusion implants

An interbody spinal fusion implant for fusion of two adjacent vertebrae in the human spine in which said implant to be interposed between the vertebral endplates of said adjacent vertebrae, comprising:

• upper and lower walls, insertion and trailing walls, and side walls;
• a plurality of openings in at least said upper and lower walls, at least some of said plurality of openings allowing for communication between said upper wall and said lower wall so as to be capable of containing fusion promoting materials for promoting bone ingrowth is continuity through said implant from the vertebral endplate of one of said adjacent vertebrae to the vertebral endplate of the other of said adjacent vertebrae for fusion of said adjacent vertebrae;
• said upper and lower walls forming a support structure including at least a portion of the surfaces of said upper and lower walls between said plurality of openings and between said insertion, trailing, and side walls for bearing against the vertebral endplates of the adjacent vertebrae, said upper and lower walls being disposed at least in part in a diverging angular relationship to each other from said insertion wall to said trailing wall, said upper and lower walls being spaced apart at a distance from each other that is greater at said trailing wall than at said insertion wall;
• whereby the insertion of said implant between the vertebral endplates of the two adjacent vertebrae supports the two adjacent vertebrae in an angular relationship and allows for bone growth to occur through said implant from one vertebral endplate adjacent to said implant to the other vertebral endplate adjacent to said implant.