Control group patients received traditional physical therapy treatment. The traditional physical therapy treatment program consisted of TMJ mobilization techniques include distraction, anterior glide, anterior glide with pre-positioned mouth opening, medial/lateral glides, caudal-anterior-medial (CAM) glide, and CAM glide with pre-positioned mouth opening and isometric exercises against resistance for muscles of mastication.

Study group patients received PEMFT, using EMG 8400 PEMF device (made in Italy, by EME) in addition to physical therapy treatment program.

PEMFT was connected to electrical mains supplying 220v. Pair of applicators sized 16x10x3 cm was adjust to be over TMJ, on both sides of the face; the appliance was adjusted to the frequency of 50 HZ and intensity of 90 Gauss. Twelve PEMF treatment sessions of 30 min duration were provided 3 times per week TMJ mobilization techniques and isometric exercises against resistance for muscles of mastication

Each participant was asked to open his or her mouth as wide as possible after that the examiner used a digital Vernier caliper to measure the maximum vertical distance from the incisal edge of the upper central incisors to the incisal edge of the lower central incisors at the midline

Visual Analogue Scale (VAS) was used to evaluate pain intensity. VAS is a subjective pain measurement method consisting of a straight line of 100 mm on which patients scored their pain intensity where 0 corresponds to no pain and 10 corresponds to the worst maximum pain