Three-dimensional analysis of miniscrew position changes during bone-borne expansion in young and late adolescent patients

Progress in Orthodontics

Table 4 Correlation between the miniscrew axis angle longitudinal difference measured in the frontal view and the distance from the median palatine process to the midline measured at AND or PNS level

	AND_Right		AND_Left		PNS_Right		PNS_Left
	r	P value	r	P value	r	P value	r	P value
Frontal view
Left anterior miniscrew—angle to occlusal plane	0.154	0.553	0.108	0.680	0.244	0.345	0.336	0.203
Right anterior miniscrew—angle to occlusal plane	− 0.099	0.706	− 0.44	0.866	− 0.203	0.435	− 0.017	0.949
Left posterior miniscrew—angle to occlusal plane	0.293	0.254	0.36	0.156	0.267	0.301	0.682	0.003*
Right posterior miniscrew—angle to occlusal plane	0.048	0.053	0.228	0.379	0.463	0.061	0.404	0.121

r, Pearson correlation coefficient, or Spearman’s rank correlation test coefficient; P value, P value of Pearson correlation test, or P value of Spearman’s rank correlation test coefficient. *statistically significant