The cylindrical implants of Storm line are usable in most of operative situations, including GBR (Guided Bone Regeneration) with simultaneous implant insertion, in cases where the macromorphlogy produces a high primary stability. The special thread which produces a perfect fit to the implant alveolus, makes the fixture stable without difficulty also in conditions of reduced residual crest. This kind of system, conceived as a submerged system, is also usable with the trans-mucotic techniques. The polygonal external implant-abutment connection has a geometry which uses a hexagon on which complementary abutments are inserted. They can be used both in a fixed prosthesis, since they are available in different diameters, and for the overdenture construction.