Odontogenic maxillary sinusitis is a problem that is at the junction of two specialities: otorhinolaryngology and dentistry. According to domestic and foreign authors in the structure of dental diseases, odontogenic maxillary sinusitis is6-24%. According to doctors-otorhinolaryngologists among all types of sinusitis about 40% is odontogenic maxillary sinusitis. Currently, there is a gradual increase in the number of odontogenic maxillary sinusitis. This is due to the improved diagnosis of this pathology. The use of dental computed tomography usually allows establishing reliably the cause of odontogenic maxillary sinusitis. Unsatisfactory results of treatment of some dental diseases, the increase in the number of odontogenic maxillary sinusitis determines the relevance of the study. The problem of odontogenic maxillary sinusitis is considered, modern views on the aetiology, pathogenesis, clinic, diagnosis and treatment according to domestic and foreign authors, as well as some issues of the relationship of pathology of intraosseous structures and the course of odontogenic maxillary sinusitis, the principles of an interdisciplinary approach in the treatment of odontogenic maxillary sinusitis are presented. The search for new methods of treatment of odontogenic maxillary sinusitis is dictated by some differences in clinical manifestations of odontogenic sinusitis from rhinogenic. The approach based on the joint primary examination and treatment of patients with suspected odontogenic maxillary sinusitis by an otorhinolaryngologist and maxillofacial surgeon, as well as the development of further tactics for the management of this category of patients, is, in our opinion, promising. The use of modern methods of functional endoscopic surgery is an effective means of prevention and treatment of odontogenic maxillary sinusitis, as it is a minimally invasive technique that allows you to create conditions for further rational prosthetics of the oral cavity.