“…12 The resin-based sealer AH Plus was used as a control group in all included studies for comparison with calcium silicate-based bioceramic sealers. Regarding the instrumentation, 3 studies used Reciproc VDW, 1,17, 19 2 studies used WaveOne Gold, 11,26 1 study used ProTaper Next, 18 1 study used ProTaper Gold, 14 1 study used both ProTaper Next and WaveOne Gold, 29 1 study used Pro-Taper Universal retreatment files with ProTaper Gold, 16 and 1 study mentioned only nickel-titanium rotary files. 12 The obturation techniques used varied between the studies -2 studies used the single-cone technique, 17,19 2 studies used the warm vertical compaction technique, 16,26 2 studies used the lateral compaction technique, 14,29 1 study used the continuous-wave compaction technique (AH Plus sealer) and the single-cone technique (Endoseal MTA), 18 1 study used the single-cone and vertical compaction technique, 11 1 study filled root canals using the HEROfill Soft-Core obturator system, 1 and 1 study used the system B technique for root canal obturation.…”