Obturation quality of bioceramic sealers with different obturation techniques: a micro-CT evaluation

This micro-computed tomography (micro-CT) analysis in vitro study was designed to compare void volume in root canal fillings performed using the single-cone (SC) technique and the continuous wave condensation (CWC) technique with bioceramic (BC) sealer. Forty human-extracted, single-rooted mandibular premolars were cleaned, shaped, and divided into two groups (n = 20) based on the obturation technique. In the first group, obturation was performed using the CWC technique with TotalFill HiFlow BC sealer. In the second group, obturation was performed using the SC technique with the conventional TotalFill BC sealer. All roots were scanned with micro-CT, and ©CTAn software version 1.20.8.0 was used to measure the void volume of each root third in all samples. Despite the different obturation techniques, both groups exhibited voids in filled root canals. The overall mean void volume in the SC group (0.253 ± 0.186) was significantly higher (p = 0.000) than that in the CWC group (0.035 ± 0.043). The difference was significant in the coronal (p = 0.000) and middle (p = 0.017) thirds. The CWC technique with TotalFill HiFlow BC sealer achieved superior obturation quality compared to the SC technique with conventional BC sealer in oval-shaped premolars.