Changes of occlusal plane inclination after orthodontic treatment in different dentoskeletal frames

Progress in Orthodontics

Table 6 Comparison between BOP and FOP in each skeletal pattern

(BOP-SN°)-(FOP-SN°)^a		Skeletal class I (n= 30)	Skeletal class II (n= 30)	Skeletal class III (n= 30)
Pre-treatment	Mean ± SD	−0.13 ± 2.71	−0.02 ± 2.29	−0.24 ± 3.44
Pre-treatment	p value	0.799	0.968	0.000***
Post-treatment	Mean ± SD	1.29 ± 1.93	0.90 ± 1.74	0.52 ± 1.53
Post-treatment	p value	0.017*	0.009**	0.076

^a “°” represents the unit of angle measurement “degree”; *p < 0.05; **p < 0.01; ***p < 0.001.