Orthopantomograms from 250 persons, edentulous in one or both jaws, were examined with the aim to assess the frequency and location of significant radiographic abnormalities. The most frequent findings were retained roots and teeth, disclosed in 11.1% and 4.9% of the subjects, respectively. The findings were compared with the results of previous surveys and the various radiographic methods used in the examination of edentulous jaws discussed. The results of this and previous studies demonstrates (1) the necessity of a routine radiographic examination of the jaws of every patient before construction of a single denture or complete dentures, and (2) the need for a better extraction technique together with more universal use of radiographs before and after extraction.