[Dynamic magnetic resonance of the temporomandibular joint. Observations and findings]

Condylar movements can be executed only if the TMJ morphology can satisfy functional needs of the masticatory apparatus. Articular components have to be in good relation with dento-skeletal functional anatomy: if this does not occur, mandibular dynamics may establish some functional stresses on the condylar head and the articular eminence. These overloaded structures and particularly their functional surfaces react to this situation to be remodelling and deformation of the articular cavity. In our work we have used a new method to analyse condylar dynamics using MRI. The reconstruction of mandibular movements, using this instrumentation, permits to make some useful observations on the functional capability of TMJ to adjust itself to different maxillofacial morphologies and, consequently, how this joint can fall in a dysfunctional and pathological condition.