Geometrical Approaches for the Accurate Identification of Normal Vertical Positions of Sella and Nasion Points in Cephalograms

Table 1

Various descriptive parameters of the subjects.

Variables	Gender	Values mean ± SD	Significance ( value); Males vs females
Age (yrs)	Males	22.06 ± 3.86	0.704^NS
	Females	22.33 ± 3.99
	Total	22.21 ± 3.92
∠FH-PP (°)	Males	1.17 ± 0.88	0.186^NS
	Females	0.97 ± 0.80
	Total	1.06 ± 0.84
∠FH-SN (°)	Males	7.02 ± 0.84	0.033^∗
	Females	7.33 ± 0.73
	Total	7.18 ± 0.79
∠PP-SN (°)	Males	8.23 ± 1.08	0.585^NS
	Females	8.33 ± 0.92
	Total	8.26 ± 0.99
Cranial base angle (∠N-S-Ba) (°)	Males	129.74 ± 2.26	0.736^NS
	Females	129.89 ± 2.45
	Total	129.82 ± 2.35

N, nasion; S, sella; Ba, basion; FH, Frankfort horizontal plane; PP, palatal plane; SN, SN plane. (Yr) = year, ∠ = angle, (°) = degree, SD = standard deviation, NS = nonsignificant, ^∗ =  .