Dental prosthesis, comprising: - a dental implant having an external thread for screwing the dental implant into a jawbone and having an internal thread arranged inside the dental implant; - a superstructure having an internal bore; and - a screw for fastening the superstructure to the dental implant, wherein the screw comprises a screw head having a cylindrical or conical lateral surface and a shank which adjoins a lower end of the screw head and on which an external thread is arranged, wherein, in an assembled state of the dental prosthesis, the screw is inserted through the internal bore of the superstructure into the dental implant and the external thread of the screw engages the internal thread of the dental implant, and wherein the screw head comprises a convexly rounded chin between the cylindrical or conical lateral surface and its lower end, with which chin the screw abuts the superstructure in the internal bore in the assembled state of the dental prosthesis, characterized in that (i) the cylindrical or conical lateral surface of the screw head abuts the superstructure in the internal bore, and/or that (ii) the shank comprises, in an upper region adjacent the lower end of the screw head, a non-threaded cylindrical portion that abuts the dental implant in the assembled state of the dental prosthesis. - a dental implant having an external thread for screwing the dental implant into a jawbone and having an internal thread arranged inside the dental implant; - a superstructure having an internal bore; and - a screw for fastening the superstructure to the dental implant, wherein the screw comprises a screw head having a cylindrical or conical lateral surface and a shank which adjoins a lower end of the screw head and on which an external thread is arranged, wherein, in an assembled state of the dental prosthesis, the screw is inserted through the internal bore of the superstructure into the dental implant and the external thread of the screw engages the internal thread of the dental implant, and wherein the screw head comprises a convexly rounded chin between the cylindrical or conical lateral surface and its lower end, with which chin the screw abuts the superstructure in the internal bore in the assembled state of the dental prosthesis, characterized in that (i) the cylindrical or conical lateral surface of the screw head abuts the superstructure in the internal bore, and/or that (ii) the shank comprises, in an upper region adjacent the lower end of the screw head, a non-threaded cylindrical portion that abuts the dental implant in the assembled state of the dental prosthesis. wherein, in an assembled state of the dental prosthesis, the screw is inserted through the internal bore of the superstructure into the dental implant and the external thread of the screw engages the internal thread of the dental implant, and wherein the screw head comprises a convexly rounded chin between the cylindrical or conical lateral surface and its lower end, with which chin the screw abuts the superstructure in the internal bore in the assembled state of the dental prosthesis, characterized in that (i) the cylindrical or conical lateral surface of the screw head abuts the superstructure in the internal bore, and/or that (ii) the shank comprises, in an upper region adjacent the lower end of the screw head, a non-threaded cylindrical portion that abuts the dental implant in the assembled state of the dental prosthesis.