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Table 1 Outcomes for the mean differences between programmed and implemented IPR

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

Region Tooth n teeth Programmed IPR (P-IPR) Implemented IPR (I-IPR) (P-IPR)-(I-IPR) 95% CI for mean IPR difference p value
LOWER LL5 9 0.22 ± 0.15 0.15 ± 0.16 0.07 ± 0.10 [− 0.008; 0.153] 0.0724
LL4 34 0.20 ± 0.10 0.11 ± 0.14 0.09 ± 0.16 [0.031; 0.139] 0.0031**
LL3 45 0.29 ± 0.17 0.14 ± 0.16 0.16 ± 0.20 [0.1; 0.218]  < .0001****
LL2 46 0.35 ± 0.16 0.20 ± 0.16 0.14 ± 0.20 [0.077; 0.199]  < .0001****
LL1 47 0.34 ± 0.16 0.17 ± 0.15 0.17 ± 0.18 [0.121; 0.227]  < .0001****
LR1 47 0.34 ± 0.16 0.20 ± 0.15 0.13 ± 0.16 [0.085; 0.18]  < .0001****
LR2 47 0.34 ± 0.17 0.18 ± 0.17 0.17 ± 0.22 [0.103; 0.23]  < .0001****
LR3 42 0.30 ± 0.16 0.14 ± 0.18 0.17 ± 0.23 [0.096; 0.24]  < .0001****
LR4 31 0.23 ± 0.11 0.14 ± 0.12 0.09 ± 0.15 [0.032; 0.141] 0.0030**
LR5 14 0.38 ± 0.25 0.25 ± 0.19 0.12 ± 0.18 [0.02; 0.225] 0.0232*
Overall 362 0.31 ± 0.17 0.17 ± 0.16 0.14 ± 0.19 [0.12; 0.16]  < .0001****
UPPER UR5 8 0.45 ± 0.21 0.20 ± 0.17 0.25 ± 0.19 [0.095; 0.405] 0.0065**
UR4 17 0.28 ± 0.13 0.15 ± 0.15 0.13 ± 0.16 [0.05; 0.216] 0.0038**
UR3 24 0.25 ± 0.14 0.12 ± 0.19 0.12 ± 0.16 [0.051; 0.189] 0.0016**
UR2 23 0.27 ± 0.16 0.18 ± 0.14 0.09 ± 0.16 [0.025; 0.165] 0.0104*
UR1 27 0.28 ± 0.16 0.13 ± 0.11 0.16 ± 0.18 [0.086; 0.225]  < .0001****
UL1 27 0.27 ± 0.17 0.13 ± 0.11 0.13 ± 0.19 [0.056; 0.204] 0.0013**
UL2 22 0.27 ± 0.16 0.16 ± 0.19 0.11 ± 0.18 [0.028; 0.186] 0.0103*
UL3 26 0.23 ± 0.13 0.15 ± 0.16 0.08 ± 0.18 [0.008; 0.154] 0.0313*
UL4 19 0.27 ± 0.14 0.13 ± 0.11 0.14 ± 0.16 [0.061; 0.214] 0.0013**
UL5 11 0.39 ± 0.22 0.19 ± 0.16 0.20 ± 0.12 [0.119; 0.283] 0.0003***
Overall 204 0.28 ± 0.16 0.15 ± 0.15 0.13 ± 0.17 [0.105; 0.153]  < .0001****
LOWER + UPPER Total number of teeth 566 0.30 ± 0.16 0.16 ± 0.16 0.14 ± 0.18 [0.121; 0.151]  < .0001****
  1. LL5 lower left second premolar, LL4 Lower left first premolar, LL3 lower left canine, LL2 lower left lateral incisor, LL1 lower left central incisor, LR1 lower right central incisor, LR2 lower right lateral incisor, LR3 lower right canine, LR4 lower right first premolar, LR5 lower right second premolar, UR5 upper right second premolar, UR4 Upper right first premolar, UR3 Upper right canine,UR2 Upper right lateral incisor, UR1 Upper right central incisor,UL1 Upper left central incisor, UL2 Upper left lateral incisor, UL3 Upper left canine, UL4 Upper left first premolar, UL5 Upper left second premolar, IPR Interproximal reduction, P-IPR Programmed IPR, I-IPR Implemented IPR, CI Confidence interval
  2. *P < .05; **P < .01; ***P < .001, ****P < .0001