An 8-year-old boy complains of an acute pain in his lower left jaw, general weakness, high body temperature of 38.6°C, and problems with opening the mouth and swallowing. Objectively, the face is asymmetrical because of edema in the submandibular region and in the lower third of the left cheek. Mucosa in the area of teeth 73, 74, and 75 is edematous on the both sides of the alveolar process. The Pulsief teeth are mobile, percussion is positive, the Vincent's sign is positive. What is the most likely diagnosis in this case?