Mandibular response after rapid maxillary expansion in class II growing patients: a pilot randomized controlled trial

Progress in Orthodontics

Table 2 Descriptive statistics and statistical comparisons on the T2–T1 changes (Kruskal-Wallis test or ANOVA or with Tukey’s post hoc tests)

Variables	RME bonded (1) (n = 10)		RME banded (2) (n = 10)		Controls (3) (n = 10)		P	1 vs 2	2 vs 3	1 vs 3
Variables	Mean median	SD 25/75	Mean median	SD 25/75	Mean median	SD 25/75	P	1 vs 2	2 vs 3	1 vs 3
Age	1.0	0.1	1.0	1.0/1.1	1.0	0.1	0.742	0.0	0.0	0.0
Sagittal skeletal
SNA (deg)	0.0	0.4	− 0.1	0.4	− 0.2	0.9	0.845	0.1	0.1	0.2
SNB (deg)	0.5	0.5	0.2	0.6	0.2	0.7	0.390	0.3	0	0.3
ANB (deg)	− 0.7	0.6	− 0.2	0.7	− 0.3	1.0	0.412	− 0.5	0.1	− 0.4
Pg to NPerp (mm)	0.8	0.7	0.4	1.0	0.1	1.2	0.296	0.4	0.3	0.7
Co-Gn (mm)	0.6	1.2	0.7	1.1	0.9	0.4	0.837	− 0.1	− 0.2	− 0.3
Vertical skeletal
SN to mandibular plane (deg)	−0.6	0.8	0.5	0.6	0.9	0.7	0.000	− 1.1**	− 0.4	− 1.5***
ArGoMe (deg)	−0.9	0.7	0.4	1.2	0.6	1.3	0.012	− 1.3*	− 0.2	− 1.5*
LAFH (mm)	−0.3	0.8	0.5	0.7	0.6	1.1	0.064	− 0.8	− 0.1	− 0.9
Interdental
Overjet (mm)	− 0.7	− 1.4/− 0.4	− 0.8	− 0.9/− 0.2	− 0.2	− 0.5/0.0	0.070	0.1	− 0.6	− 0.5
Overbite (mm)	0.5	0.3/2.2	0.2	− 0.1/1.5	0.3	− 0.4/0.9	0.154	0.3	− 0.1	0.2
Molar relationship (mm)	1.1	0.7	0.8	0.7	0.4	0.8	0.154	0.3	0.4	0.7