Table 3.

Planes for splitting 3D photographs into right face, left face, submental, and neck regions.

Plane	Defined by	Explanation
Frankfurter	Landmarks: left and right Ex and one OBS of choice.	Part of the 3D photograph superior to this plane is excluded, defining the superior border of the facial regions.
Face–submental	Landmarks: left and right OBI and Pg’.	Splits the face region from the submental region.
Submental–neck	Landmarks: left and right OBI and H’.	Splits the submental region from the neck region.
Neck inferior	Landmarks: left, middle, and right Ninf.	Part of the 3D photograph inferior to this plane is excluded, defining the inferior border of the neck region.
Mid	Landmarks: Pg’, Sn, and midpoint between left and right Ex.	Splits the face in left and right regions.
Head posterior	Landmarks: left and right OBI and one OBS of choice.	Part of the 3D photograph posterior to this plane is excluded, defining the posterior border of the facial regions.
Neck posterior	Landmarks: left and right OBI; Plane defined by the landmarks: left and right A, and one OBS of choice.	Part of the 3D photograph posterior to this plane is excluded, defining the posterior border of the neck region.