A dental superstructure, and a manufacturing method thereof, comprising a screw-channel (1), through which screw-channel a screw member is to be inserted, and a screw member seat (3), for providing support to the head of said screw member during fixation of said dental superstructure to a spacer element or an implant (5), are provided. Said dental superstructure is provided with a central axis of said screw-channel (1) and a central axis of said second mouth (4) that at least partly do not coincide. A manufacturing method thereof, a screw-member, and a screwdriver are also provided.