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Table 2 Mean values with standard deviations and 95% confidence intervals (CI) of dimensional dental casts variables at T0 and T1 achieved with the extrusion arch mechanics with mean differencesa

From: A prospective clinical trial of the effects produced by the extrusion arch in the treatment of anterior open bite

Variables T0 (Initial) T1 (Final) T1–T0 CI (95%)  
  Mean SD Mean SD Mean SD UB LB P value
Arch Perimeter 78.66 4.84 75.63 5.86 − 3.02 3.07 − 4.79 − 1.25 .003*
Arch Length 29.07 2.46 26.84 2.92 − 2.23 1.85 − 4.79 − 1.16 .001*
Overjet 4.89 2.01 3.24 1.47 − 1.65 1.75 − 2.65 − 0.64 .004*
Overbite − 1.28 1.46 1.79 1.23 3.07 1.57 − 2.17 − 3.97 < .0001*
Mesial intermolar distance 51.65 3.08 51.31 2.85 − 0.33 0.90 − 0.85 0.18 .188
Distal intermolar distance 55.05 3.49 54.69 3.66 − 0.36 1.08 − 0.98 0.27 .239
Incisors clinical crown height 9.11 0.74 9.44 0.92 0.33 0.64 − 0.08 0.58 .011*
  1. aLB indicates lower bound, UB upper bound, SD indicates standard deviation
  2. *P < .05
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