An impression of the tooth (8) is taken with a solidifiable material from which the false tooth is moulded and joined to the existing tooth which is previously subjected to abrasive treatment. The impression material totally encloses the surface of the tooth destined for subsequent treatment. The hollow cavity between the remaining tooth substance and the impression material is filled with a low-viscous false-tooth material. A container space in a deep-drawing cap for the impression material has an open end with an opening guided over a tooth. The opening is closed by a film. Another opening spaced apart from the container-opening is closed by a membrane.
