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

GroupMean
(mm)
SD
(mm)
T-test statisticDfP-valueEffect size (Cohen’s d)
Mesial wall, 3 mmA10.80420.20879–1.630600.1080.414
C1 + A10.89550.23167
Mesial wall, 5 mmA10.86840.222590.050600.960–0.013
C1 + A10.86580.17780
Mesial wall, 7 mmA10.91940.21409–0.142600.8880.036
C1 + A10.92650.17779
Distal wall, 3 mmA10.79870.16134–0.428600.6700.109
C1 + A10.81870.20394
Distal wall, 5 mmA10.87260.196760.636600.527–0.162
C1 + A10.84030.20284
Distal wall, 7 mmA10.78160.18657–0.951600.3450.242
C1 + A10.82810.19774

SD: standard deviation; Df: degree of freedom