MRI is the gold standard for the differential diagnosis of normal and pathological joint components, as it best visualizes the joint components. 

Gross TMJ anatomy in the closed and open mouth positions in sagittal and coronal views is shown in Fig. 1, 2. The proposed scanning protocol for assessing TMJ dysfunction is shown in Fig. 3. In addition to the scanning protocol, note in Fig. 4 that the articular disc is better differentiated on the PD with a long TE =39-49, between T2 TE =80-100 and PD =TE 20-30).

TMJ dynamic (Fig. 5, 6) consists of five short scanning time PD sag sequences stitched together (1 PD = 23 seconds, total time = 1 minute 55 seconds): the first sequence shows the mouth closed, and the following four sequences show varying degrees of mouth opening (sequence 5 shows the mouth open as wide as possible). 

Dynamic images:

-they are useful for understanding the position of the articular disc at different degrees of mouth opening;

-short scanning time allows maximum mouth opening, which eliminates false-positive results of a stuck TMJ disc.