1. Apparatus ( 21 ) for acquiring panoramic, teleradiographic and optionally CBCT volumetric dental radiographies, comprising a support holding a rotary arm ( 26 ) which in its turn supports at one end a first X-ray source ( 27 ) and at the other end an X-ray detector ( 28 ) at a suitable distance for acquiring panoramic and optionally CBCT volumetric images, characterized in that there is only one patient positioning system ( 25 ), and comprising a second X-ray source ( 207 ) at a distance from detector ( 28 ) suitable for acquiring cranial teleradiographies.