Historically, radiographic evaluation of the temporomandibular joint has been of limited value. A step-by-step technique which is more correct anatomically is suggested. This technique involves polycycloidal corrected tomography of the temporomandibular joint. Radiographic samples are presented, as well as the results of a random sampling of 300 cases. Fifty-seven percent of the cases showed radiographic changes, and the reasons and limitations of these results are interpreted.