A 25-year-old man complains of pain in the area of tooth 16, heavy bursting sensation in the right upper jaw, headache, and body temperature of 38°C. Objectively, the right cheek is swollen, palpation of the maxillary alveolar process is painful, percussion of tooth 16 is painful. Anterior rhinoscopy shows hyperemia and edema of the mucosa in the right nasal passage. The middle nasal passage contains mucopurulent discharge. Make the diagnosis: