Chronic inflammatory diseases of the pharynx and larynx are among the most common in the pathology of ENT organs [1, 3, 14, 15]. According to various sources, from 70 to 80% of patients who seek help from an ENT doctor present complaints characteristic of chronic pharyngolaryngitis. The reasons for the development of this pathology are quite diverse, and diseases of the nasal cavity and paranasal sinuses occupy a special place among them [5, 16]. Despite this, ENT doctors often carry out long-term unsuccessful treatment of chronic inflammatory diseases of the pharynx and larynx without establishing the true cause of this pathology, which may be due to a carious process, periodontitis, and a low level of oral hygiene [4, 8, 9, 10, 11 , 12].