[Clinical and functional aspects of endonasal operation of the maxillary sinuses].

A total of 118 detailed questionnaires sent out to patients 3-5 years after endoscopic endonasal maxillary sinus surgery were evaluated. Forty-four patients (37.3%) were re-examined endoscopically. The procedure involves no complications, and 87% of the patients judged the endoscopic treatment of chronic maxillary sinusitis to have been successful. Supraturbinal antral windows remained patent, and a higher percentage were functionally intact compared with infraturbinal ones. The mucociliary pathways of the maxillary sinus via the antral window were restored postoperatively.