The various clinical and laboratory procedures for use of auxiliary prefabricated metal screw retention, castable plastic telescopic, and custom laboratory-fabricated systems are presented as adjuncts to implant-supported restorative procedures. These devices aid in the fabrication of predictable and retrievable screw-retained, fixed-detachable implant-supported prostheses for various conditions and combinations of support. Ancillary screw systems are also useful in solving cosmetic problems when implant placement compromises this goal.