Gap volume and sealer penetration of C‐shaped root canals obturated with cold hydraulic technique and calcium silicate sealer

Abstract

This study compared the gap volume and sealer penetration in C‐shaped root canals prepared with adaptive core rotary files and obturated with cold hydraulic compaction using calcium‐silicate sealer, warm vertical hybrid compaction, or lateral compaction using epoxy‐resin sealer. Thirty‐six extracted mandibular molars with pulpal floor configuration Types I and III were used. The teeth were prepared using XP‐Shaper and XP‐Finisher and obturated with: group 1: cold hydraulic compaction/calcium silicate, group 2: warm vertical hybrid compaction/epoxy resin, or group 3: lateral compaction/epoxy resin. The gap volume was evaluated using μ‐CT. The sealer penetration depth and area were evaluated using confocal laser scanning microscopy. The gap volume in groups 1, 2, and 3 was 0.82%, 0.24%, 0.80%, respectively, which were not significantly different (p > 0.05). The gap volumes in the obturated C‐shaped canals were not significantly different among the CHC/CSBS, WHC/ERS, or LC/ERS groups. CHC/CSBS was the most convenient technique.

Evaluation of various obturation techniques with bioceramic sealers in 3D-printed C-shaped canals

“…Samples obturated with CHC techniques showed a significantly higher void percentage among groups in the apical third. Wisawantin et al [ 17 ] reported similar findings with obturating natural C-shaped canals with bioceramic sealers and CHC technique compared with epoxy-resin sealers. They also reported spreader tracts in samples obturated with this technique.…”

“…Previous studies have explored various C-shaped canal obturation techniques with resin sealers using printed resin replicas [ 19 , 20 ]. However, research on obturating C-shaped canals with bioceramic sealers is scarce [ 17 ]. Given the bioceramic sealers’ favorable properties, easy application, and capability to reach anatomically challenging areas, they emerge as potential filling material in the root canal treatment of teeth with complex anatomies [ 4 ].…”

“… E. MTA/E. TCS + cold hydraulic compaction [ 17 ]: After injecting sealer into the canal, one master gutta-percha cone (0.04/#40) (Sure Dent, Gyeonggi-do, South Korea) was coated with sealer and inserted into the working length. A root canal spreader was passively inserted (without lateral compaction force) into the main canals and isthmus area to approximately 2 mm from the working length.…”

“…Cold hydraulic compaction (CHC), characterized by its straightforwardness and predictability, uses accessory gutta-percha cones as a plunger to disseminate the sealer into canal irregularities, thereby facilitating a more effective seal. Wisawawatin et al [ 17 ] have found that obturating C-shape canals with calcium silicate-based sealers and the CHC method caused comparable gap volume compared to obturation with epoxy resin sealers and lateral or warm vertical compaction. However, there is a knowledge gap concerning the efficacy of the CHC technique compared with previous sealer activation.…”

Endodontic Retreatment of a Mandibular Second Molar With a C-shaped Root Canal Configuration: A Case Report

“…For the obturation of the C-shaped root canal system, the cold hydraulic technique combined with calcium silicate sealer was chosen. This method is not only convenient but also capable of achieving a root-filling quality comparable to that of warm vertical compaction or lateral compaction with epoxy resin sealer [ 32 ]. The effectiveness of this approach was clearly demonstrated in the post-obturation radiograph, showing the successful implementation of the technique and the thorough filling of the complex canal system.…”