Apparatus (21) for acquiring panoramic, teleradiographic and optionally CBCT volumetric dental radiographies, is proposed which comprises 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. The apparatus further comprises only one patient positioning system (25), and a second X-ray source (207) at a distance from detector (28) suitable for acquiring cranial teleradiographies.