Abstract: An Abutment (1) for the manufacturing of the internal structure of screwed dental prostheses, has two functional parts constituted by a base (2, 2b, 2c) whose lower face connects with the implant or transepithelial pillar head and in whose interior there is a housing (8) for the screw (9) head and a curved coping (3, 3b, 3c) joined to the base (2, 2b, 2c) through which the prosthesis orifice is established allowing access to the screw (9) head. The assembly is formed by the base (2, 2b, 2c) and the curved coping (3, 3b, 3c) defining an external surface which has a uniform continuity.

Abstract: Screw (100), surgical driver (400), kit and torque key (500) to fix a prosthesis (200) on a dental implant (300). The screw (100) has a pin comprising fixing means arranged to fix the screw (100) in the implant (300) in a detachable way; a head, to house the prosthesis (200). The head comprises a protruding area which is mostly spherical and has curved-concave meridional sunken areas (110) to receive a grip (410, 510) of a handling tool (400, 500) for the screw (100); with a latitude between ±80°, with respect to the equator (E) of the head. The surgical driver (400) has a work part comprising fastening means with a shape which combines with the shape of the head of the screw (100). The kit comprises the surgical driver (400), the screw (100) and a protective cap (450). The torque key (500) has a similar configuration to that of the surgical driver (400).