title: [Mucociliary ultrastructure and distribution of maxillary natural ostium].
authors: Cheng-li
authors: CL
authors: Xu
authors: Geng
authors: G
authors: Xu
mesh_terms: D002923:Cilia / Q000648:ultrastructure*; D006801:Humans; D008443:Maxillary Sinus / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D009092:Mucous Membrane / Q000648:ultrastructure*