Odontogenic sinusitis - a disease, which is in the interests of the two medicine disciplines: ENT and dentistry, in connection with which there are problems in the tactics of the patients. We present a case report forms odontorinogennoy odontogenic sinusitis. We used a combined approach to the maxillary sinus - endoscopic through natural fistula and access through its front wall. Management of these patients requires friendly work otolaryngologists and dentists, their knowledge of related areas, as it directly depends on the final outcome of therapy of this disease.