Abstract: Disclosed is a kit in parts comprising (i) a visualiser for a dental implant which comprises a) a mechanical connection part to a predetermined implant root defining, relative to the visualiser, the vector of the implant root along the axis of orientation, and b) at least three markers, contrasting under electromagnetic radiation with their an observable and recognizable by an electromagnetic recognition technique, whereby the markers define a geometric pattern of which the recognition technique is capable of collecting the spatial information, and (ii) a data file from which the spatial information of the geometric pattern may be retrieved and referenced to information determining the vector of the implant root relative to the pattern, and also identifying the visualiser and the predetermined implant root. Further disclosed is a method for preparing a dental prosthesis using the kit, as well as the visualiser itself.

Abstract: The present invention refers to a mixture comprising alpha CaSO4×½ H2O, CaSO4×2 H2O, a combination of a hardening accelerator, a hardening retarder and a setting expansion inhibitor, and optionally a surfactant. The mixture can be used to prepare a die having an extremely high setting expansion.