Frankfurt horizontal plane

Frankfurt horizontal plane

Etymology: Frankfurt-am-Main (anthropological) Agreement, 1882
(in dentistry) a craniometric surface determined by the inferior borders of the bony orbits and the upper margin of the auditory meatus. It passes through the two orbitales and the two tragions and is commonly used as a reference surface in orthodontic diagnosis and treatment planning.

Frank·furt hor·i·zon·tal plane

(frahngkfurt hōri-zontăl plān)
1. A cephalometric plane that passes through the inferior borders of the bony orbits and the upper margins of the auditory meatus.
2. A reference plane in orthodontic diagnosis and treatment planning.
[Frankfurt-am-Main Agreement, Germany, site of 1884 anatomy convention]
References in periodicals archive ?
Control the Frankfurt horizontal plane which runs from the lower left orbit to the upper margin of the external auditory canal (a correct exposure shows a slight smile).

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