The entity temporomandibular joint disorders is an umbrella term which combines those with true pathology of the temporomandibularjoint (h1J) and those with involvement of the muscles of mastication (myofascial pain dysfunction). It has been estimated that 25% of general population suffers from TMJ related symptoms and only 2% of them seek treatment. General joint and muscle diseases, psychological and psychosocial factors, and local influences such as occlusal disturbances, parafunctional activities, i.e. bruxism, and traumas, can affect the condition of temperomandibular joint. Early diagnosis and prompt treatment can often obviate the need for more extensive therapy.