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. 2015 May-Jun;20(3):50–57. doi: 10.1590/2176-9451.20.3.050-057.oar

Table 6. Pearson correlation coefficient between transversal width of buccal bone (TWBB) and dental expansion within the two bracket system groups.

Measurements r P
P1 TWBB 0.15 0.467
P2 TWBB 0.28 0.176
M1 TWBB 0.09 0.676

M1 = first molar, P2 = second premolar and P1 = first premolar.