Table 3: Descriptive statistics and correlations between CBCT measurements and model-based tooth movement ( 𝑛 = 1 5 , weekly aligner group).

VariableMeanSDMinMaxSpearman correlation 𝑃 value
with model tooth movement

Age 25.50 4.80 20.50 35.90 −0.46 0.08
Δ 𝑈 1 (x) 1.56 0.38 0.80 2.02 0.90 <0.0001
Δ 𝑈 1 (s) 1.63 0.40 0.80 2.09 0.86 <0.0001
Δ Apex −0.73 0.26 −1.32 −0.39 −0.72 0.0023
Tooth length 24.87 2.02 21.67 30.32 −0.42 0.12
Crown length 12.27 0.74 10.84 13.27 −0.17 0.55
Root length 12.60 1.74 10.56 17.74 −0.40 0.14
Crown/root ratio 0.99 0.12 0.71 1.23 0.12 0.67
Bone to C-rot 5.14 1.25 2.89 7.70 −0.10 0.72
Δ 𝑈 1 (o) −0.28 0.16 −0.52 0.00 0.25 0.38
Δ 𝑈 1 (t) 1.85 0.36 1.08 2.40 0.70 0.0036
Fractal dimension 1.71 0.20 1.37 2.00 0.25 0.36