Abstract: A humeral prosthesis including a shank having a metaphyseal part having a housing therein with a semi-spherical portion in which housing is introduced a sphere to which is secured a bearing surface hemispherical cap adapted to be received within the glenoid cavity of a shoulder. A securing element is provided which extends through the metaphyseal part of the shank for securing the sphere within the housing at a predetermined position with respect to the shank.

Abstract: A device for attaching a prosthesis including a metal foundation provided with a plate integrally formed with at least one anchoring pin consisting of elastically deformable wings and at least one the screw cooperating with a nut. The screw goes through the pin, to spread the wings into a position away from a longitudinal axis of the pin. The anchoring pin comprises an internal bore having a cylindrical base connecting the pin to the plate, and a circular counter-bore adjacent the bore of greater diameter than the internal bore of the pin, making it possible to spread the wings while maintaining their rigidity over their entire length.