Frankfort Horizontal Plane - how to use it?

[IntelligentCel]

Can someone explain me how to use the FHP line to determine if I'm recessed (subhuman) or not recessed (human)?

Is the Frankfort Horizontal Plane a single line or a group of lines? Where do I need to draw the line(s) and what should I be looking for, exactly?

Please, help me!!! I can't find any definitive results and answers on Google regarding my questions about the FHP line.

 

[thecel]

Is the Frankfort Horizontal Plane a single line or a group of lines?

A plane contains an infinite number of distinct lines.

 

[Deleted member 26824]

lol its explained everywhere on youtube

 

[Kama]

It’s a line used to assess if your chin is recessed by drawing perpendicular line from nasion to chin . It goes from top of ear hole to bottom of eye hole (superior aspect of external auditory meatus is to inferior aspect of orbital meatus). You have to make sure that you are not tucking your head or jutting your jaw forward and it has to completely side profile. Lot of people take shitty angles and analysis ends up inaccurate.