Soft tissue analysis

Question 1

How is Powells analysis carried out?

Answer 1

Divide the face into a series of triangles involving the forehead, nose, lips, chin and neck as such:
-> G’ to Pog’ : Frankfort anterior facial plane
-> FH’ : Frankfort horizontal
-> G’- N’ : tangent to glabella through soft tisssue nasion
-> N’ - R’ : tangent to nasal dorsum
-> NT’ - Pog’ : nose tip to soft tissue pogonion
-> C’ - Me’ : submental line
measure
1) Nasofrontal angle
2) Nasofacial angle
3) Nasomental angle
4) Mentocervical angle