The present invention relates to a computer - implemented method for generating a 3d - data model (10) of a jaw (12, 14) of a patient, wherein the 3d - data model (10) of the jaw (12, 14) at least a 3d - part data model (16) of the tooth crowns (k) which is located in a predetermined tooth position of the teeth (z) of the jaw (k) and a 3d - part data model of the gums comprises. According to the invention, there are, in the course of the carrying out the process a point in time at which the 3d - data model of the jaw (12, 14) free of any of the actual gum (fis) of the patient representative animals ndem 3d - part data model (18) is. Subsequently, a 3d - part data model of a fictitious gums, on the basis of at least of the 3d - part data model (16) of the tooth crowns (k) and for 3d - data model of the jaw (12, 14) are added.
