Table 1.

Cephalometric reference points: lines and measurement values (1–6)

1	Ba-N–Pt-Gn	Facial axis
2	P-Or–Me-hT	Mandibular plane angle
3	Xi-DC–Xi-Pm	Inner gonial angle
4	Xi-Spa–Xi-Pm	Lower facial height
5	P-Or–N-Po	Facial depth
6	Ba-N–N-A	Maxillary position