ABSTRACT
MRI is a new imaging technique that has been adapted to evaluate the T.M.J. disorder and aid in the plane of treatment presurgically. In this study ten T.M.Js of twenty patients suffering from disc dysfunction and subjected for surgical treatment were selected from Oral Surgery Department. The affected sides were imaged by MRI technique care 1.5 Telsa magnet and using surface coil which provide a high resolution of tissues contrast, the results revealed that MRI provide an accurate modality in detection of disc displacement with or without reduction comparing with the normal joint which act as control. MRI can be visualized all soft tissue components of TMJ than do radiographic methods. Also, patients are not exposed to ionizing radiation and there are no biological hazards effect