Abstract
espanolObjetivo: Evaluar la eficacia de la inyeccion de toxina botulinica A (TBA) en los musculos pterigoideos guiada por electromiografia (EMG) para el tratamiento del dolor miofascial masticatorio. Material y metodos: Realizamos un estudio retrospectivo de 31 pacientes diagnosticados de dolor miofascial de origen masticatorio a los que se le administro TBA en los musculos pterigoideos laterales y mediales guiada por EMG. Se evaluo la efectividad por disminucion de intensidad del dolor mediante escalas numericas (EN) y escalas categoricas (EC). Ademas, se determino el impacto de esta patologia en su calidad de vida, la duracion del tratamiento y la disminucion de la demanda de analgesicos. Resultados: La disminucion media del dolor en la EN tras tratamiento fue de 4,9 ± 2,9 puntos. Se observo una disminucion estadistica del dolor (p Conclusiones: La administracion de TBA guiada por EMG en los musculos pterigoideos es eficaz en el tratamiento del dolor miofascial masticatorio, mejor la calidad de vida y se consigue una disminucion del consumo de analgesicos postratamiento. EnglishAim: To evaluate the efficacy of botulinum toxin A injection (BTA) in the lateral pterygoid muscles assisted by electromyography (EMG) for the treatment of masticatory myofascial pain (MMP). Material and methods: We conducted a retrospective study of 31 patients diagnosed of MMP who were treated by infiltration of botulinum toxin A in 1, 2 or 3 times, in the lateral and medial pterygoid muscles by electromyographic control of the puncture site. We assessed the treatment effectiveness in pain intensity decrease by numerical scales (NS) and categorical scales (CS). The impact of pathology on its quality of life, the decrease of demand for analgesic drugs, and the duration of BTA effect and its side effects were also valued. Results: The mean decrease in pain after treatment was 4.9 ± 2.9 points in NS. A statistical decrease of the pain (p = 0.01) can be shown after treatment. There is no statistical relationship between greater improvement after the administration of a greater number of injections. However, there is a significant improvement in the decrease of the pain in CS (p = 0.028) after the administration of several injections. There is also a significant decrease (p = 0.012) of the use of analgesic medication post-treatment. Conclusions: EMG assisted pterygoid muscles infiltration of BTA is effective in the treatment of MMP; it improves quality of life and decreases the consumption of health resources.
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