Stopped: We decided to stopped the study because we have difficulties in recruiting subjects phase.
Patients affected by chronic orofacial pain represent an emergent medical problem due to the lack of knowledge on the cause, pathophysiology and psychology of many of these conditions, that belongs to a multifactorial origin. Particularly, temporomandibular joint disorders involve a series of symptoms that refers both to intrinsic and extrinsic joint conditions where pain can be associated to a reduction of the joint movement, click or to other sounds of the joint. The lack of a recognized causal therapy led to the suggestion of many treatment modalities with a multidisciplinary approach for the management of symptoms that include the use of occlusal splints, physiotherapy-speech therapy, behavioral and physical therapy, drugs, chirurgical approaches. In most cases these strategies together allow the control of the symptoms, even though they aren't completely resolutive. In these patients is frequent chronic pain and ineffectiveness of common drugs used. It has been demonstrated how transcranial electrical brain stimulation with direct current (tDCS) is able to reduce the intensity and the duration of chronic pain. Stimulating the motor cortex can reduce pain by modulating brain activities in the areas involved in cerebral circuits controlling pain, such as thalamus, facilitating the descendant inhibitory mechanisms and enhancing the number of opiates receptors. This clinical trial is based on the evaluation of the effects of tDCS on pain and on activities daily living (ADL) participation patients with chronic orofacial pain that don't respond to other treatments.
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Change from baseline in Visual Analogue Scale (VAS) for pain
Timeframe: 1) one day pre-tDCS 5 days treatment. 2) Every day, for 5 days pre and post tDCS stimulation. 3) one day post tDCS 5 days treatment. 4)Follow up at one month.