A 33-year-old female patient has been admitted to the maxillofacial department with complaints of pain and edema of the right submandibular region, body temperature rise up to 39,5°C. Objectively: the patient has asymmetric face because of soft tissue edema of the right submandibular region, palpation reveals a dense infiltration, the skin over it is hyperemic, does not make a fold. The 46 tooth has a deep carious cavity. What is the most likely diagnosis?