Retained root fragments along septa in the maxillary sinuses.
D006801:Humans; D008443:Maxillary Sinus / Q000000981:diagnostic imaging*; D008963:Molar / Q000000981:diagnostic imaging*; D011859:Radiography; D014092:Tooth Root / Q000000981:diagnostic imaging*; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging*; D014097:Tooth, Unerupted / Q000000981:diagnostic imaging*