[Comparative studies on panoramic radiographic (Panorex) and intra-oral radiographs]

27 patients with periodontal lesions were examined by Panorex layered film and 14 intra-oral dental X-ray films (Updegrave's long tube right angle technique). The result of this enquiry shows that the two radiological methods do not compete with one another. Each has advantages over the other which derive from fundamentally different exposure techniques. The dental status films with right angle technique are superior in showing clear periodontal structures and hard dental tissue whilst the Panorex method gives X-ray surveillance over the whole mastication organ and neighbouring structures which cannot be visualised in its entirety by the intra-oral method.