Male part (2； 20) for reversible fixation that can be released from a dental prosthesis construction with a jaw, whose male part (2； 20) is formed with a fixing structure by which the male part can be fixed ( 2； 20) in the jaw, in an implant implanted in the jaw, in a root or in an adjacent tooth, comprising: a body section (12； 120) with an outer surface corresponding to an enveloping surface of a cylinder, the central axis of the cylinder defining a longitudinal axis (19； 190) of the male part (2； 20)； a crimping section (11； 110) axially displaced with respect to the longitudinal axis (19； 190) of the male part (2； 20) with respect to the body section (12； 120), which comprises a curved outer surface of convex shape along the longitudinal axis (19； 190), which projects outward from the outer surface of the body section (12； 120) of the longitudinal axis (19； 190) of the male part (2； 20)； and a head end (13； 130) axially closing the male part (2； 20) with respect to its longitudinal axis (19； 190)； the crimp zone (11； 110) being arranged closer to the head end (13； 130) than the body section (12； 120), a concave intermediate section (18； 180) being disposed between the curved outer surface of convex shape of the crimping section (11； 110) and the head end (13； 130), characterized in that the head end (13； 130) of the male part (2； 20) is completely curved in shape convex and closedPieza macho (2； 20) para la fijación reversible que se puede soltar de una construcción de prótesis dental con una mandíbula, cuya pieza macho (2； 20) está formada con una estructura de fijación mediante la cual se puede fijar la pieza macho (2； 20) en la mandíbula, en un implante implantado en la mandíbula, en un raigón o en un diente contiguo, que comprende: una sección de cuerpo (12； 120) con una superficie exterior correspondiente a una superficie envolvente de un cilindro, definiendo el eje central del cilindro un eje longitudinal (19； 190) de la pieza macho (2； 20)； una sección de
