A modified approach for obtaining cephalograms in the natural head position.

Cephalograms taken in the Natural Head Position (NHP), and related to the true vertical and the true horizontal reference planes should logically replace the planes used in conventional cephalometry. This has not happened because of the difficulties in radiographically recording the NHP. This paper presents a modified approach to capture the true vertical reference line on the patients' face itself in NHP, which is then transferred to the conventional lateral cephalogram.