[1] The osteomeatal complex contains the narrow channels that provide for mucociliary clearance and ventilation of the anterior ethmoid, maxillary, and frontal sinuses. Relatively minor swelling ...

There were 134 (20.3%) anteriorly and 17 (2.5%) posteriorly localized maxillary sinus bony septa. The position of antral septa was frequently vertical at anterior, and horizontal at posterior.