Drainage of maxillary sinus Luc Vrielinck
Image coutesy of Prof. Burak Bayram
Drainage of sinus Flow of mucus superiorly against gravity Upward course along walls of enire cavity and then towards natural ostium in superomedial wall Drainage into ethmoidal infundibulum Mucus coursing along lateral wall, carried medially, along roof to reach ostium
Mucociliary flow from antarior sinuses converge at OMC, carried to posterior nasopharynx & inferiorly to eustachian tube orifice
Donald et al & Antunes et al.