a) Porion and Orbitale
c) Porion and sella
b) Nasion and se lla
d) Porion and Nasion
The correct answer is A. Porion and Orbitale.
FHP or Frankfort horizontal plane = Formed by joining Porion and orbitale
SN plane or anterior cranial base = Formed by joining nasion and sella
Cranial base length = Nasion and Bolton line
Upper facial height = Nasion to ANS (anterior nasal spine)
Lower facial height = ANS to menton
Total facial height = Nasion to menton
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