Abstract: An impression system includes an impression cap (4) for transferring an end, protruding from a human tissue structure, of an implant (1) which is fitted in the human body, including possible superstructures, to a master cast. The outwardly directed implant end has an undercut contour on its outside, and the impression cap (4) has a geometry which complements the undercut contour and engages therein. The undercut contour is formed either by an implant geometry tapering in a trumpet shape towards the implant bed, or by a recess near the implant end. Taking an impression and producing a master cast are greatly simplified with the impression system. In addition, the actual geometrical situation on the patient can be transferred to the master cast with greater precision.

Abstract: The connection arrangement between an implant (1) and a straight or angled abutment (800) can be produced using a clamping screw (400) and an expanding ring (500). An inlet (830) is provided in the abutment (800), and near the lower end of the abutment (800) this inlet (830) is widened via a radially encircling groove (835). The expanding ring (500) through which the clamping screw (400) passes is supported in the groove (835), the head (410) of the clamping screw (400) pressing on the expanding ring (500), and its threaded segment (430) engaging in the threaded bore (21) of the implant (1). The clamping screw (400) can be pushed from below into the inlet (830), with the expanding ring (500) pushed on and with the head (410) leading. The implant (1) can have a non-rotationally symmetrical receiving contour on the inner cone, primarily an inner polygon, and the abutment (800) advantageously has a counter-contour complementary to the receiving contour. A special screwdriver is used for screwing.