Evaluation of interproximal reduction in individual teeth, and full arch assessment in clear aligner therapy: digital planning versus 3D model analysis after reduction

Progress in Orthodontics

Table 2 Between-group comparisons in the mean differences between programmed and implemented IPR

Group	Region	n patients	n teeth	Programmed IPR (P-IPR)	Implemented IPR (I-IPR)	(P-IPR) − (I-IPR)	95% CI for mean IPR difference	p. Value for difference between P-IPR and I-IPR	p Value for between group comparison of difference between P-IPR and I-IPR
All (anterior and posterior)	Lower arch	53	362	0.31 ± 0.17	0.17 ± 0.16	0.14 ± 0.19	[0.12; 0.16]	< .0001****	0.4783
All (anterior and posterior)	Upper arch	43	204	0.28 ± 0.16	0.15 ± 0.15	0.13 ± 0.17	[0.105; 0.153]	< .0001****	0.4783
All (anterior and posterior)	Left side	74	286	0.29 ± 0.16	0.15 ± 0.15	0.13 ± 0.18	[0.112; 0.154]	< .0001****	0.6789
All (anterior and posterior)	Right side	71	280	0.30 ± 0.17	0.17 ± 0.16	0.14 ± 0.19	[0.117; 0.161]	< .0001****	0.6789
Anterior teeth (1,2,3)	Lower	53	274	0.33 ± 0.16	0.17 ± 0.16	0.16 ± 0.20	[0.133; 0.18]	< .0001****	0.0302*
Anterior teeth (1,2,3)	Upper	42	149	0.26 ± 0.15	0.14 ± 0.15	0.12 ± 0.17	[0.087; 0.144]	< .0001****	0.0302*
Anterior teeth (1,2,3)	Left	73	213	0.30 ± 0.16	0.16 ± 0.16	0.14 ± 0.19	[0.114; 0.165]	< .0001****	0.7708
Anterior teeth (1,2,3)	Right	70	210	0.30 ± 0.16	0.16 ± 0.16	0.14 ± 0.19	[0.119; 0.171]	< .0001****	0.7708
Posterior teeth (4,5)	Lower	38	88	0.24 ± 0.15	0.15 ± 0.15	0.09 ± 0.15	[0.058; 0.122]	< .0001****	0.0059**
Posterior teeth (4,5)	Upper	22	55	0.32 ± 0.18	0.16 ± 0.14	0.17 ± 0.16	[0.122; 0.208]	< .0001****	0.0059**
Posterior teeth (4,5)	Left	48	73	0.25 ± 0.15	0.13 ± 0.14	0.11 ± 0.15	[0.08; 0.15]	< .0001****	0.7413
Posterior teeth (4,5)	Right	44	70	0.29 ± 0.17	0.17 ± 0.15	0.12 ± 0.17	[0.084; 0.163]	< .0001****	0.7413