A 58-year-old patient complains of stuffiness in the ears, hearing impairment, pain in the parotid region when opening the mouth. Objectively: the 18, 17, 16, 15, 26, 27, 28 teeth are restored with swaged metal crowns. There is a 1,5-2 mm gap between the crown edges and gingiva. The 14 and 25 teeth exhibit carious cavities. Probing, percussion and thermal stimuli cause no pain response. The patient has deep incisor overbite. What is the likely cause of otologic symptoms?