Maxillary sinusitis is one of the most common and frequently recurrent diseases. Dental implantation is a universally known and recognized treatment option for adentia. The mucociliary transport system in the maxillary sinus plays an important role in preventing its pathological processes. The impairments in mucociliary transport and intranasal architectonics, which underlie nasal physiological aerodynamic changes, are of great importance for the development of an inflammatory process in the paranasal sinuses. Obvious mucosal swelling in the nose and paranasal sinuses results in luminal narrowing in the natural fistula, which may give rise to impaired ventilation and drainage function of the paranasal sinuses. Rehabilitation using dental implants in patients with full or partial adentia is extensively used in dental practice. With long-term adentia and decreased functional load, the volume and density of bone tissue in the distal maxillary alveolar process reduce and become inadequate to place dental implants. As of now, sinus lift is widely used to increase the alveolar process bone volume that is reduced due to atrophy resulting from tooth loss. When planning this operation, specialists have to frequently encounter different inflammatory changes in the maxillary sinus. Before sinus lift and dental implantation, a preoperative diagnosis protocol should include computed tomography of the upper jaw along with the entire nasal cavity and paranasal sinuses in order to rule out their abnormalities. Endoscopic techniques used to treat chronic maxillary sinusitis lowers the traumaticity of surgical intervention and can improve the results of therapy in patients with this disease. The joint approach applied by ENT specialists and dentists to treating secondary adentia in patients with maxillary sinusitis will be able to shorten the time of treatment and rehabilitation as a whole.