35+ Floor Of Maxillary Sinus Pictures. The maxillary sinus has a pyramidal shape, with its base directed medially against the nasal cavity and the apex pointing posterolaterally. Development begins in utero at 3 months as an evagination of the epithelium of the lateral wall.
The pyramid shaped maxillary sinus (or antrum of highmore) is the largest of the paranasal sinuses, and drains into the nose. They may appear like closed pockets filled with liquid or semisolid. It is divided into rostral and caudal compartments by an oblique bony septum that continues dorsally into a thin the caudal maxillary sinus is partially divided by the infraorbital canal, axially to which it communicates with the sphenopalatine sinus.
Anatomy of the maxillary sinus.
The infraorbital nerve as well as artery traverses the roof in a bony canal. See more ideas about maxillary sinus, sinusitis, sinus infection. Open approaches to the maxillary sinus were first described in the early 1700s. Outline of bones of face, showing position of air sinuses.