Mean dentin thickness in the mesial and distal canal walls in the two groups prior to instrumentation

GroupMean
(mm)
SD
(mm)
T-test statisticDfP-valueEffect size (Cohen’s d)
Mesial wall, 3 mmA10.94810.19373–1.547600.1270.393
C1 + A11.02770.21136
Mesial wall, 5 mmA11.04840.237520.300600.766–0.076
C1 + A11.03260.17293
Mesial wall, 7 mmA11.12320.23624–0.137600.8910.035
C1 + A11.13100.20652
Distal wall, 3 mmA10.90970.19663–0.982600.3300.249
C1 + A10.96190.22164
Distal wall, 5 mmA11.00810.22716–0.041600.9680.010
C1 + A11.01030.20819
Distal wall, 7 mmA10.99970.19570–0.781600.4380.198
C1 + A11.04000.21055

SD: standard deviation; Df: degree of freedom