DESCRIPTION OF THE CLINICAL CASE Female patient, aged 22, showed up for an appointment of occlusion at SAMS - Centro Clínico de Lisboa refering muscle pain and fatigue after arousal, level 70 using the visual analogique scale (VAS) when performing palpation of both Masseteres muscles. She mentioned that she had been using a oral appliance for over 3 years and has an acentuated dental wearing with dentin exposure. The final diagnostic of the Temporomadibular Disorder with muscular origin was estabilishied through the axis I of Diagnostic Criteria for Temporomandibular Disorders (DC//TMD). In this precise case the ETPS therapy was selected with one session per week, on a total of 3, each one during 10 minutes and with a 150 Hz frequency in the Masseteres. At the begining and ending of each session a review of pain performing palpation of the Masseter and Temporal muscles was made, using VAS. DISCUSSION The results are consistent with the published literature.The high, levels of pain during palpation in both masseteres gradually decreased in every session, specialy in the trigger points. CONCLUSIONS ETPS is an effective method of pain control for TMD with muscle disorder, even when the oral appliance didn't show effective. Keywords: TMD, ETPS, Pain, Muscular