A 46-year-old patient complains about difficult mouth opening, body temperature rise, edematic tissues around both mandibulotemporal joints. Anamnesis data: 2-3 months ago the patient had undurable mild bilateral pain attacks in the parotidomasticatory areas that lasted for a few days, limited mouth opening, sense of tension and discomfort in some areas of left and right mandibulotemporal joint. What is the most probable provisional diagnosis?