The mean and standard deviation of actual length (AL) and electronic length (EL) measurements obtained by Root ZX and Sybron mini in the presence of various irrigants are shown in Table 1. The mean differences between the electronic and the AL were 0.002 mm and –0.21 mm for Root ZX and Sybron Mini, respectively. ANOVA showed a highly significant difference between the two EALs at P=0.000. The effect of irrigant on the canal length determinations measured with Root ZX and Sybron Mini is as shown
