A 28-year-old man is referred for oral cavity sanation. On examination there is a ?lling on the masticatory surface of tooth 17, percussion is painless. Mucosa in the root apex projection of 17 is cyanotic, vasoparesis symptom is positive. X-ray shows foci of bone tissue destruction with fuzzy margins in the area of root apices, root canals are not ?lled. What is the most likely diagnosis?