The maxillary antrum.
D000293:Adolescent; D000328:Adult; D005891:Gingivitis / Q000150:complications; D006801:Humans; D008443:Maxillary Sinus / Q000033:anatomy & histology / Q000473:pathology*; D008875:Middle Aged; D012852:Sinusitis / Q000209:etiology; D013492:Suppuration / Q000209:etiology; D014076:Tooth Diseases / Q000150:complications