Panoramic dental x-ray unit comprising:- a support rotating about an axis and carrying, in the opposite position, an x-ray source and detector which move following a predetermined trajectory andmeans for acquiring images of the dental arch of a patient corresponding to the positions of the detector and of the source with respect to the dental arch,The device comprises the means for reconstruction of a two portions of a panoramic image corresponding respectively to two disconnected portions of the dental arch (2A-2E, 2F-2D), the reconstruction being performed from certain acquired images which each contain at least one piece of information concerning the two disconnected portions of the dental arch.
