BMC Oral Health

Table 6 Pearson correlations between periodontal variables and midpalatal suture gap according to intervention groups

From: Skeletal and alveolar changes in conventional rapid palatal expansion (RPE) and miniscrew-assisted RPE (MARPE): a prospective randomized clinical trial using low-dose CBCT

Periodontal variables			MPS (T1)
Periodontal variables			RPE (N = 17)	MARPE (N = 19)
PM-BBPT (mm)	T1-T0	r	0.059	− 0.040
	T1-T0	Sig	0.823	0.872
	T2-T0	r	0.225	− 0.016
	T2-T0	Sig	0.384	0.949
PM-PBPT (mm)	T1-T0	r	0.403	0.503
	T1-T0	Sig	0.109	0.028*
	T2-T0	r	0.384	0.298
	T2-T0	Sig	0.128	0.215
M-BBPT (Mesial root) (mm)	T1-T0	r	− 0.073	− 0.341
	T1-T0	Sig	0.779	0.153
	T2-T0	r	0.009	− 0.190
	T2-T0	Sig	0.972	0.435
M-BBPT (Distal root) (mm)	T1-T0	r	0.107	− 0.407
	T1-T0	Sig	0.684	0.084
	T2-T0	r	0.029	− 0.287
	T2-T0	Sig	0.912	0.234
M-PBPT (mm)	T1-T0	r	0.069	0.286
	T1-T0	Sig	0.792	0.236
	T2-T0	r	− 0.058	0.444
	T2-T0	Sig	0.826	0.057

*Indicate statistical significance with Pearson’s correlation test (*P < 0.05). Abbreviations: MPS (T1), midpalatal suture gap at T1; RPE, rapid palatal expansion; MARPE, mini-screw assisted rapid palatal expansion; T0, before treatment; T1, immediately after expansion; T2, after a 3-month consolidation period; r, Pearson’s correlation; Sig, significance

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