Apertura piriformis

The aperture piriformis ( Latin : apertura "opening"; piriformis "pear-shaped") is the opening of the facial skull to the bony nasal cavity . It is covered by the nose made of cartilage and can be felt well as a bony edge in the upper and lateral area.

It is mainly formed by the right and left upper jaw bones , which unite at the lower edge to form the anterior nasal spine ; in the upper part the nasal bone delimits the opening. The cartilaginous septum (nasal septum) divides it into two halves.

The piriformis aperture can be narrowed by congenital malformations or by midface fractures or a fracture of the nasal bone , so that surgical expansion by lateral osteotomies as part of a rhinoplasty may be necessary.

The piriformis aperture gives you a clear view of the main nasal cavity.
In other primates the aperture piriformis is flatter than in humans.
The aperture piriformis is responsible for the characteristic appearance of the skull.
lateral view

Individual evidence

^ Karl Zilles, Bernhard Tillmann : Anatomie . Springer, 2010, ISBN 978-3-540-69483-0 , pp. 96 ( google.com ).
↑ C. Röösli et al .: Congenital Stenosis of the Apertura piriformis , ENT, February 2007, Volume 55, Edition 2, pp. 125–127. doi : 10.1007 / s00106-006-1385-8 .

[1] Karl Zilles, Bernhard Tillmann : Anatomie . Springer, 2010, ISBN 978-3-540-69483-0 , pp. 96 ( google.com ).

[2] C. Röösli et al .: Congenital Stenosis of the Apertura piriformis , ENT, February 2007, Volume 55, Edition 2, pp. 125–127. doi : 10.1007 / s00106-006-1385-8 .