Frankfurt plane

The Frankfurt plane may also be used as a reference point in related fields.

I pulled up my pants, ran the length of the airport and just caught the Frankfurt plane.

The porion is one of the three anatomical points used to determine the Frankfurt plane.

For example, in prosthodontics, the Frankfurt-Mandibular plane Angle (FMA) is the angle formed at the intersection of the Frankfurt plane with the mandibular plane.

In humans, the anatomical position for the skull is the Frankfurt plane, where the lower margins of the orbit (anatomy) and the upper borders of the ear canals are all in a horizontal plane.

The Frankfurt plane (also called the auriculo-orbital plane) was established at the World Congress on Anthropology in Frankfurt, Germany in 1884, and decreed as the anatomical position of the human skull.

For the purposes of comparison, the skulls of other species, notably hominids and primates may be studied in the Frankfurt plane, but it is not considered to be the anatomical position for other species.

In humans, the anatomical position of the skull has been agreed by international convention to be the Frankfurt plane, a position in which the lower margins of the orbits, the orbitales, and the upper margins of the ear canals, the poria, all lie in the same horizontal plane.