Strip perforation repair is one of the most challenging treatments in endodontics. Marginal adaptation is a crucial factor in evaluating the sealing ability of materials. This study aimed to microscopically examine the marginal adaptation of bioceramic-based sealers, MTA-Angelus, and Cold Ceramic in repairing strip perforation areas. The mesiobuccal canals of 80 human mandibular first molars were prepared using rotary files and then divided into two groups (A and B, n = 40). All samples in group A were obturated using the lateral compaction technique with gutta-percha and AH-26 sealer. Then, strip perforation was created using Gates Glidden and piezo reamer drills. The samples were divided into subgroups (A1 and A2, n = 20). The strip perforations in groups A1 and A2 were repaired with MTA-Angelus and Cold Ceramic. Strip perforation in group B was formed in the mesiobuccal canals after root canal preparation and before obturation. Then, the samples were divided into B1 and B2 subgroups (n = 20) and filled with Sure-Seal Root and Endoseal MTA sealers, respectively. Afterward, obturation was completed using the single-cone technique with gutta-percha 0.04 taper. The marginal adaptation in the perforation area was measured in all the samples using a stereomicroscope with Dino-Lite Capture software. SPSS software was used to analyze the data using one-way analysis of variance (ANOVA) and the Kruskal-Wallis test. The greatest mean gap length was observed in the Endoseal MTA group (0.116 ± 0.203), followed by the Sure-Seal Root (0.097 ± 0.215), MTA-Angelus (0.083 ± 0.225), and Cold Ceramic (0.016 ± 0.052) groups. The mean gap length between the groups was not significantly different (p = 0.375). This study's results indicate a comparable marginal adaptation for Endoseal MTA, Sure-Seal Root, and Cold Ceramic to MTA-Angelus.
Moradi et al. (Sun,) studied this question.