The aim of this study was to summarize results of the investigation of temporomandibular joint (TMJ) by magnetic resonance (MR) in various types of its disorders. MR imaging visualizes the bone and soft tissue components of TMJ including the disc and dynamic investigation during a gradual mouth opening visualizes the inner movement of the disc in detail. Twenty six patients with TMJ disorders (i.e. 52 TMJ) were investigated in a dynamic study during the period 1996–2003. The group consisted of 24 women and 2 men between the ages of 18 and 67 (35.6 years of age on the average). All the patients were examined by means of 1.5 T MR. Pathological MR findings were observed in 92.3 % of investigated TMJ, 78.8% of which represented ventral derrangement of the disc.The affection of mandible headwas present in 7.6% of cases. It can be summed up that the ventral derrangement of the disc with or without reposition represented the most frequently observed dysfunction of TMJ. The dynamic investigation of TMJ in FFE mode (in T1 weighted images) was well tolerated by all patients and the method is appropriate enough for evaluation of the joint dynamics. It visualized the inner translate rotary movement of the head and also the disc movements in single movement phases.

        Key words: temporomandibular joint – MR imaging