the maxillary sinus is located in the nose bone.
the maxillary sinus is located in which bone?
nose
below the bulla ethmoidalis, and partly hidden by the inferior end of the uncinate process of ethmoid bone, is the maxillary hiatus (or ostium maxillare, or maxillary sinus ostium, or maxillary ostium, or opening from the maxillary sinus); in a frontal section this opening is seen to be placed near the roof of the sinus. in the articulated skull this aperture is much reduced in size by the following bones: the uncinate process of the ethmoid above, the ethmoidal process of the inferior nasal concha below, the vertical part of the palatine behind, and a small part of the lacrimal above and in front; the sinus communicates with the middle meatus of the nose, generally by two small apertures left between the above-mentioned bones.
maxillary hiatus
the maxillary sinus is known for its thin floor walls and close proximity to the posterior maxillary teeth. dental procedures such as extraction of these teeth sometimes cause oac. the posterior maxillary molars and maxillary sinus are innervated by the same branch of nerves which is the maxillary division of trigeminal nerve. this innervation complicates the situation as the pain from maxillary sinus might be indistinguishable from a posterior maxillary toothache. other known causes of oac are fracture across the antral floor typically le fort i, displacement of posterior maxillary molar roots into antrum, and direct trauma. extraction of primary teeth are not considered a risk of oac due to the presence of developing permanent teeth and the small size of a developing maxillary sinus. oac can happen for many other reasons, such as acute or chronic inflammatory lesions around the apex of tooth root present in close proximity with the maxillary antrum, necrotic lesions of the maxilla, failure of sublabial incision to heal after caldwell-luc antrostomy, multiple and extensive fractures of the facial region, osteomyelitis of the maxilla, injudicious use of instruments during oral procedures, malignancy of the maxillary sinus, syphilis, malignant granuloma, radiotherapy, implant denture, removal of a large cyst or resection of large tumour involving maxilla, development of tumour causing bone destruction and loosening of teeth.
oroantral fistula