Suprameatal triangle Definition
The suprameatal triangle is an area in the temporal bone.
It is a triangular shape formed by
- The zygomatic arch root
- The posterior wall of the external, bony acoustic meatus
- A line that links the extremities of the zygomatic arch root and the posterior acoustic meatus
The structure is also known as Macewen’s triangle.
Suprameatal triangle Location
It is situated between the posterior root of the zygomatic process and the posterior wall of the external acoustic meatus. In an adult, the mastoid antrum lies at an approximate depth of 1.5 to 2 cm to the suprameatal triangle. The supreameatal triangle is located in a deep position to the cymba conchae.
Suprameatal triangle Functions
This triangular structure is used as an important landmark in operations involving the mastoid antrum, such as Cortical Mastoidectomy. During Mastoidectomy, an instrument may be inserted into the mastoid antrum through this triangle.
Suprameatal triangle Pictures
Here are some Suprameatal triangle images that you will find useful. You may use these Suprameatal triangle photos for reference, medical or otherwise.
Picture 1 – Suprameatal triangle
Picture 2 – Suprameatal triangle Image