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Table 6 Correlation between space gain strategy and crowding in the upper arch

From: Predictability of crowding resolution in clear aligner treatment

Δ Irregularity index

Δ 3-3

Δ 4-4

Δ 5-5

Δ 6-6

Δ Arch length

Δ IPR

Pearson's r

 − 0.45

 − 0.27

0.04

 − 0.04

0.08

0.03

p value

0.01

0.09

0.80

0.80

0.63

0.88