Background:The posterior region of the edentulous maxilla often presents insufficient bone quantity and quality for prosthetic rehabilitation with endosseous implants. The sinus lift procedure is one of the primary surgical options allowing placement of dental implants in the posterior maxilla. However, the procedure may be complicated in patients with chronic maxillary sinusitis.

Aim and Objectives: Optimization of the sinus–lifting in the pathology of the maxillary sinus by a one–stage endonasal endoscopic elimination of the sinus pathology and carrying out a sinus–lifting.

Materials and methods:A total of 18 patients with ridge defects were selected for the study. The technique of of simultaneous endonasal sanitation of the maxillary sinus, endoscopically assisted sinus–lifting, dental implantation, was used in 12 patients.

 Results:The method of simultaneous endonasal sanitation of the maxillary sinus, endoscopically assisted sinus–lifting, dental implantation, allows to reduce the probability of perforation of the membrane, significantly shortening the rehabilitation period of patients with insufficient bone tissue in the maxillary sinus.