Progress in Orthodontics

Table 4 Comparison of inclination of occlusal planes and other skeletal/dental variables within and between groups

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

Measurements	Within groups (pvalue)			Between groups (pvalue)
	Pre- vs. post- treatment			Pre-treatment			Post-treatment
	Skeletal I	Skeletal II	Skeletal III	I vs. II	I vs. III	II vs. III	I vs. II	I vs. III	II vs. III
Skeletal frame
SNA°^a	0.121	0.001**	0.071	0.944	0.000***	0.000***	0.781	0.002**	0.004**
SNB°	0.867	0.038*	0.401	0.001**	0.876	0.001**	0.017*	0.742	0.007**
ANB°	0.012*	0.000***	0.589	0.000***	0.000***	0.000***	0.000***	0.000***	0.000***
MP-SN°	0.054	0.648	0.907	0.019*	0.687	0.051	NS	NS	NS
Occlusal plane
BOP-SN°	0.138	0.013*	0.539	0.012*	0.882	0.008**	0.002**	0.586	0.000***
FOP-SN°	0.302	0.279	0.372	0.021*	0.967	0.019*	0.001**	0.898	0.002**
MxOP-MnOP°	0.000***	0.000***	0.013*	0.384	0.003**	0.000***	NS	NS	NS
Dental
Overbite (mm)	0.000***	0.000***	0.063	0.207	0.000***	0.000***	NS	NS	NS
Overjet (mm)	0.000***	0.000***	0.434	0.043*	0.000***	0.000***	NS	NS	NS
Maxillary dentoalveolar
U1-SN°	0.001**	0.000***	0.000***	0.025*	0.152	0.000***	0.067	0.343	0.006**
U1-PP (mm)	0.154	0.006**	0.002**	NS	NS	NS	NS	NS	NS
U6-PP (mm)	0.000***	0.000***	0.000***	NS	NS	NS	NS	NS	NS
Mandibular dentoalveolar
L1-SN°	0.004**	0.000***	0.375	0.004**	0.005**	0.000***	0.000***	0.000***	0.000***
L1-MP°	0.019*	0.000***	0.366	0.155	0.001**	0.000***	0.014*	0.000***	0.000***
L1-MP (mm)	0.001**	0.015*	0.000***	0.240	0.172	0.012*	NS	NS	NS
L6-MP (mm)	0.000***	0.000***	0.000***	NS	NS	NS	0.233	0.086	0.004**

^a “°” represents the unit of angle measurement “degree”; *p < 0.05; **p < 0.01; ***p < 0.001; NS, not statistically significant.

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