title: Clinical significance of completely subdivided maxillary antrum.
abstract: A rare case of a completely subdivided maxillary antrum is reported. The lower compartment was a closed cavity in which infection resulted in the persistence of an oroantral fistula. Healing occurred only after the septum was broken and proper intranasal drainage by antrostomy was established.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000002:abnormalities* / Q000196:embryology; D009957:Oroantral Fistula / Q000150:complications