Dental fixation system, upon which a dental prosthesis is fastenable to an existing implant, said fixation system comprising: - a self-threading screw, - a male component, and - a female component, - a retainer element, wherein: - the self-threading screw is configured to fasten the male component to the implant, - the male component comprises a primary area configured to be located inside the gum and a secondary area, with a conical geometry configured to protrude from the gum, - the female component comprises an inner cavity with a conical geometry that fits the conical geometry of the male component, and - the prosthesis being fastenable to the female component, in such a way that the female component can be joined to the male component by means of a conical support, characterised in that: - the male component comprises a cavity located in the smaller base of the secondary area, said cavity in the male component having an inverted frustoconical geometry, - the smaller base of the conical geometry of the inner cavity of the female component comprises an extension of the inner cavity forming a groove within the conical geometry of said inner cavity, - the retainer element is made of an elastic material and comprises an inverted conical frustrum that protrudes from a disc shape, the disc shape being configured to be retained in the groove of the female component and the inverted conical frustrum being configured to be inserted into a complementary geometry in the base of the male component, such that the fastening of the female component on the male component is performed by retention, - the primary area of the male component has an axis with the same direction as an axis of the implant, to which the male component is fastened, - the secondary area of the male component has an axis with the same direction as an axis of the female component and the same direction as an axis of the prosthesis fastened to it, in such a way that the axis of the primary area and the axis of the secondary area do not coincide. - a self-threading screw, - a male component, and - a female component, - a retainer element, - the self-threading screw is configured to fasten the male component to the implant, - the male component comprises a primary area configured to be located inside the gum and a secondary area, with a conical geometry configured to protrude from the gum, - the female component comprises an inner cavity with a conical geometry that fits the conical geometry of the male component, and - the prosthesis being fastenable to the female component, - the male component comprises a cavity located in the smaller base of the secondary area, said cavity in the male component having an inverted frustoconical geometry, - the smaller base of the conical geometry of the inner cavity of the female component comprises an extension of the inner cavity forming a groove within the conical geometry of said inner cavity, - the retainer element is made of an elastic material and comprises an inverted conical frustrum that protrudes from a disc shape, the disc shape being configured to be retained in the groove of the female component and the inverted conical frustrum being configured to be inserted into a complementary geometry in the base of the male component, such that the fastening of the female component on the male component is performed by retention, - the primary area of the male component has an axis with the same direction as an axis of the implant, to which the male component is fastened, - the secondary area of the male component has an axis with the same direction as an axis of the female component and the same direction as an axis of the prosthesis fastened to it,