Table 8.

Description of cephalometric measurements in database1 [28].

No.	Measurement	Description in mathematics	Description in words
1	ANB	∠L5L2L6	The angle between the landmark 5, 2, and 6
2	SNB	∠L1L2L6	The angle between the landmark 1, 2, and 6
3	SNA	∠L1L2L5	The angle between the landmark 1, 2, and 5
4	ODI	$\angle \overline{\text{L}5\text{L}6\text{L}8\text{L}10}+\angle \overline{\text{L}17\text{L}18\text{L}4\text{L}3}$	The arithmetic sum of the angle between AB plane ($\overline{\text{L}5\text{L}6}$) to mandibular plane ($\overline{\text{L}8\text{L}10}$) and the angle of palatal plane ($\overline{\text{L}17\text{L}18}$) to FH plane ($\overline{\text{L}4\text{L}3}$)
5	APDI	$\angle \overline{\text{L}3\text{L}4\text{L}2\text{L}7}+\angle \overline{\text{L}2\text{L}7\text{L}5\text{L}6}+\angle \overline{\text{L}3\text{L}4\text{L}17\text{L}18}$	The arithmetic sum of the angle between FH plane ($\overline{\text{L}3\text{L}4}$) to facial plane ($\overline{\text{L}2\text{L}7}$), the angle of facial plane ($\overline{\text{L}2\text{L}7}$) to AB plane ($\overline{\text{L}5\text{L}6}$), and the angle of FH plane ($\overline{\text{L}3\text{L}4}$) to palatal plane ($\overline{\text{L}17\text{L}18}$)
6	FHI	$\left|\overline{\text{L}1\text{L}10}\right|/\left|\overline{\text{L}2\text{L}8}\right|$	The ratio of posterior face height (PFH, the distance from L1 to L10) to anterior face height (AFH, the distance from L2 to L8)
7	FHA	$\angle \overline{\text{L}1\text{L}2\text{L}10\text{L}9}$	The angle between SN plane ($\overline{\text{L}1\text{L}2}$) to mandibular plane ($\overline{\text{L}10\text{L}9}$)
8	MW	$\left\{\begin{array}{cc}\left|\overline{\text{L}12\text{L}11}\right|,& x\left(\text{L}12\right)<x\left(L11\right),\\ -\left|\overline{\text{L}12\text{L}11}\right|,& \text{otherwise}.\end{array}\right.$	When the x ordinate of L12 is less than L11's, the MW is $\left|\overline{\text{L}12\text{L}11}\right|$; otherwise, MW is $-\left|\overline{\text{L}12\text{L}11}\right|$.