Resumen

Introduction: Electromyography is a study that allows evaluating the motor and sensory function of the neuromuscular system through the recording of the electrical stimulus. There are few studies related to electromyography in patients with idiopathic or primary bruxism. Objective: of the present study was to evaluate the electromyographic activity of the masseter and temporal muscles in a patient with primary bruxism before and after the use of the occlusal splint and the application of botulinum toxin. Clinical case: a 62-year-old female patient with a clenching and bruxism habit accompanied by EVA scale pain 8 of 10, in the right hemifacial region of 5 years of evolution treated with analgesics, non-steroidal antiinflammatory drugs and rigid occlusal guard without improvement. Surface electromyography was performed to evaluate the intensity of the contraction of each muscle. The maximum contraction force was high in the left masseter muscle followed by the left temporalis muscle, right masseter and right temporalis muscle, the left hemisphere is predominant and with a greater degree of torsion towards the right side of the jaw, with a higher prevalence of occlusal contact in the left premolars. Treatment: the application of botulinum toxin was decided with a dilution of 1 to 1 in physiological solution and applying 5 international units in three anatomical points in the left masseter muscle and two anatomical points in the left temporal bone. Results: when applying botulinum toxin in the masseter and/or hypertonic temporal muscles a functional change is obtained, either to increase or decrease the contraction and therefore the force. Conclusions: according to the results obtained, electromyography allows to be a guide in the treatment of bruxism when determining the excessive muscular strength in the masticatory muscles and to focus the treatment when balancing the occlusal plane

Palabras clave: Electromiografía Bruxismo Guarda oclusal Toxina botulínica

2019-06-07   |   334 visitas   |   Evalua este artículo 0 valoraciones

Vol. 16 Núm.192. Abril 2019 Pags. 6-9 Odont Act 2019; 16(192)