MORPHOLOGY AND INCIDENCE OF SEPTA IN THE PARANASAL SINUSES

The variations and frequency of bony septa in the paranasal sinuses we re studied prospectively by means of computed tomography. Patients and methods: The presence and morphology of the septa in the paranasal si nuses were studied in 100 consecutive non-selected adults. Results: CT examinations of 200 maxillary antra showed variations in 26 (13%). Th ere were one complete septum (0.5%), 18 incomplete septa at the base o f the antrum (9%) and 7 incomplete septa situated anteriorly (3.5%). C onclusion: Bony septa in the sinuses may be clinically relevant during sinus endoscopy or tooth implantation. Preoperative examination may r educe the complication rate of these procedures.