a. Since this approach has proven successful in the first register phase in every respect, it is now to be continued for another two years in order to develop the basis to establish this concept as widespread (outpatient) standard. The central question will be investigated of whether the outstanding results of register phase 1 will also occur in a wide and distributed application to more centers. If this can be proved, the conditions based on worldwide unique scientific data (methodology and follow-up rates, see below) are created to establish the standard surgical procedure with central integration of 3D meshes (UPP UHS) as gold standard against the Lichtenstein method in the outpatient sector.