The invention relates to a method for taking an impression for producing a dental prosthesis, in particular a denture, comprising the procedural steps of: A) generating an impression of at least partial regions of the upper jaw and lower jaw of a patient using an at least two-part tray in the oral cavity of the patient, whereby the tray is being inserted into the oral cavity of the patient for this purpose； B) fixing the at least two tray parts to each other or against each other in the oral cavity of the patient； C) followed by determining the position and orientation of the at least two tray parts with respect to each other in the oral cavity of the patient； and D) followed by taking the tray parts out of the oral cavity of the patient. The invention also relates to a tray for taking an impression of at least partial regions of the upper and lower jaw of a patient for implementing said method,comprising at least two tray parts, whereby at least one marking is arranged on the surface of each tray part and enables the determination of the position and orientation of the markings and tray parts with respect to each other, and to a device for intra-oral determination of the orientation and position of at least two tray parts for taking an impression of at least partial regions of the upper and lower jaw of a patient with respect to each other, whereby the device is suitable for implementing said method and the device comprises a computer and a recording facility, in particular an intra-oral scanner or an intra-oral camera, that can be used to determine the position and orientation of the tray parts with respect to each other by means of an imaging method and a computer-based analysis of the images for a known shape of the tray parts, whereby said tray preferably is a separate part of the device and the position and orientation of the tray parts with respect to each other can be determined by means of a computer-based analysis of the images of the known markings on the
