Table 1 .

Values of p-IPR, i-IPR and Respective Difference for All Groups of Teeth^a

Group of Teeth	Number of Teeth	p-IPR (Mean, SD)	i-IPR (Mean, SD)	Difference (Mean, SD)	Min and Max of Difference (mm)
Maxillary premolars	50	0.29 (0.14)	0.14 (0.19)	0.15 (0.21)	−0.40; 0.50
Maxillary canines	59	0.24 (0.11)	0.10 (0.13)	0.14 (0.12)	−0.15; 0.38
Maxillary incisors	118	0.24 (0.11)	0.10 (0.15)	0.14 (0.14)	−0.43; 0.43
Mandibular premolars	49	0.22 (0.08)	0.09 (0.11)	0.13 (0.11)	−0.07; 0.39
Mandibular canines	59	0.27 (0.13)	0.08 (0.10)	0.19 (0.13)	−0.09; 0.50
Mandibular incisors	129	0.31 (0.11)	0.14 (0.16)	0.16 (0.16)	−0.31; 0.50

^ap-IPR indicates programmed interproximal reduction; i-IPR, implemented interproximal reduction; SD, standard deviation.