The maxillary sinus (latin: sinus maxillaris) is the largest of the sinuses, filling the body of the maxilla. It is somewhat pyramidal in shape. The bilateral maxillary sinuses are located lateral to the nasal cavities and under the orbits.
Each maxillary sinus opens into the middle nasal meatus of the nasal cavity with an opening called the maxillary hiatus..
The six borders or walls of the maxillary sinus are formed by the following parts of the maxilla:
The arterial blood supply to the maxillary sinus is provided by several arteries, including:
The sensory innervation of the mucosa of the maxillary sinus is provided by the following nerves: