Material Coronal third Middle third Apical third
Median (IQR) P-value Median (IQR) P-value Median (IQR) P-value
TotalFill® BC Sealer™ 13.2 (2.85; 13.45)a,b 0.146 13.1 (12.85; 13.3)a,b 0.146 13.1 (12.6; 13.55)a,b 0.146
AH Plus® Bioceramic Sealer 8.9 (8.15; 9.65)c 0.146 6.8 (5.95; 6.9)c 0.146 7.4 (7.25; 7.75)c 0.146
BioRoot™ RCS 20.4 (20.05; 20.9)a,d 0.146 23.6 (22.35; 23.95)a,d 0.146 27.3 (26.7; 29)a,d 0.146
AH Plus® Jet™ 11.6 (1.4; 12.05)b,c 0.146 17.2 (14.15; 18.15)b,c 0.146 16.3 (16; 17.2)b,c 0.146
ProRoot® MTA 68.3 (64.15; 69.3)d 0.146 67.8 (66.65; 68.7)d 0.146 70.3 (70.05; 71.45)d 0.146

Superscript letters (a to d) indicate statistically significant differences between materials within each third of the root canal, according to the compact letter display (CLD) method. Materials that share the same letter are not significantly different, whereas materials that do not share any letters are significantly different (P < 0.05, based on the non-parametric Kruskal-Wallis test followed by Dunn's post-hoc test).
IQR = interquartile range.