2.1. Sample Size Calculation
Sample size was calculated using an Openepi calculator. The mean difference between two sealers was taken as 0.42 (Sealer 1: mean ± SD = 1.22 ± 0.53 and Sealer 2: mean ± SD = 0.8 ± 0.61) [In this study, each sealer group was further divided into 3 subgroups (on the basis of obturation technique). The sample size for each sealer group (