Table 1 shows means and standard deviations of various groups and comparison of mean scores by Kruskal-Wallis test. Pairwise comparisons of six groups were carried out with Mann-Whitney U test. Group 3 exhibited maximum amount of apical leakage (3.7 ± 0.3 mm) whereas group 2 showed the least amount of apical leakage (2.1 ± 0.4 mm) among all the experimental groups. The P-value for each group was < 0.001, which shows that there were highly significant differences between the groups.