What is the importance of suprameatal triangle?

Abstract. Since it covers the lateral wall of the mastoid air system, the suprameatal triangle is of importance to otologic surgeons during mastoidectomy. Because of this clinical importance, topographic anatomy of the suprameatal spine and depression was studied on Anatolian skulls.

What is suprameatal triangle?

The suprameatal triangle (Macewen, mastoid fossa) is an area between the posterior wall of the external acoustic meatus and the posterior root of the zygomatic process. In this area, an instrument may be pushed into the tympanic antrum.

What is the important posterior relation of the mastoid antrum?

The mastoid antrum (tympanic antrum, antrum mastoideum, Valsalva’s antrum) is an air space in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum (entrance to the mastoid antrum).

What is facial ridge?

A high facial ridge is defined as having bone overlying the facial nerve that is 2 mm or greater in thickness although lowering the ridge less than this is commonly desired.

What is facial recess?

The facial recess (posterior tympanotomy) is a triangular region delineated by the fossa incudis superiorly, the facial nerve posteriorly, and the chorda tympani anteriorly (Figs 4.1 and 4.2). Anterior to the chorda tympani lies the annulus fibrosus of the tympanic membrane.

What is Aditus and antrum?

The aditus to mastoid antrum (otomastoid foramen or entrance or aperture to the mastoid antrum) is a large irregular cavity that leads backward from the epitympanic recess into a considerable air space named the tympanic or mastoid antrum.

What is epitympanic recess?

The epitympanic recess is an excavation in the dorsal (tegmental) wall, where the auditory ossicles are located. In the rostral (carotid) wall of the tympanic cavity begins the auditory tube which connects the middle ear with the nasopharynx.

Why is it called mastoid process?

Itis a complex bone, which along with many of its landmarks, features a bulgy prominence called the mastoid process. The mastoid process is easily palpable just behind the ears. It serves for the attachment of many head muscles. Moreover, it contains air-filled spaces called the mastoid air cells.