A navigation device has a position detection section, an interface, a touch panel, and a computer. The hinge comprises a first connector rigidly connected to one pillar support, a second connector slidably connected within the other pillar support, and a pivot member pivotally connected to one of the connectors by a pivot connector defining a pivot axis and rigidly connected to the other of the connectors, the pivot member received within a pillar support associated with the second connector. Retaining tubes are arranged on the cooling plate and are provided with retaining disks which are arranged outside the high-strength sheet steel of the furnace and which fix the cooling plate in the direction of the inside of the furnace. The first step confirms placement of the implant and its footprint. The server then receives the input and determines whether the string of representative characters includes the password and verification code characters in the proper order.