Assessment of the Relationship of the Frankfort Horizontal Plane and the Orbitomeatal Line with Attainment of the Natural Head Position

Abstract

The diagnosis of dentofacial deformities and the choice of ortho-surgical treatment depend on the correct positioning of the head at the time of registration in 2D or 3D, called the natural head position (NHP). We selected 32 subjects from Arnett class I and obtained their frontal and lateral photographs in NHP to evaluate the relationship and stability between the orbitomeatal line, the Frankfort horizontal plane and the face midline with the true vertical line (TVL) and the true horizontal line (THL). Mean and standard deviation of angulation were obtained for all cited variables, with the results leading to the conclusion that the orbitomeatal line and the Frankfort horizontal plane can be used to obtain the NHP in an individualized way.