Estimation of modified panoramic TMJ projection

Abstract

We investigated how to elevate the image quality of panoramic TMJ projections by modifying the position of the patient, which is known to have a significant effect on this quality. We found that when the TMJ was positioned forward and below the irradiated area, the radiographic image was similar to that obtained by selective TMJ tomography in the shape and positional relation of the mandibular head and fossa. We determined that the modified panoramic TMJ projection was effective for use in screening TMJ disorders.