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Progress in Orthodontics

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
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