Effect of different instrument systems on the quality of bio-ceramic obturation material (An in vitro leakage and SEM Study)

Abstract

Background and Objectives: Bioceramic-based root canal sealers need more evidence for proving its sealing ability. The objective of this in vitro study is to measure the leakage of extracted root canals and analyze the interfacial adaptation of the bioceramic material to canal walls. Methods: 60 extracted human lower mandibular teeth were divided randomly into 6 groups (each group 10 teeth). Group 1 and 4 were instrumented by protaper next rotary files, group 2 and 5 by wave one reciprocating files and group 3 and 6 by Two shape rotary files. All of the specimens were obturated with thermal (warm vertical compaction) technique using bioceramic as sealer. The leakage of specimens of group 1, 2 and 3 was evaluated by dye penetration method. The interfacial adaptation of specimens of group 3, 4 and 5 were analyzed using scaning electron microscopy. Results: statistics for groups 1, 2 and 3 revealed that Wave one group showed the best leakage (mean of 0.7 mm) with significant difference. By using ANOVA; Post hoc LSD test revealed that difference between groups 1 and 3 was significant, while differences between groups 2 and 1 and between groups 2 and 3 were non-significant (p<0.05). The descriptive statistics for groups 4, 5 and 6 revealed that Two shape file group showed the least interfacial gap width (mean­=31.2 µm). By using ANOVA; Post hoc LSD test revealed that difference between groups 4 and 5 was non-significant, while difference between groups 4 and 6 plus 5 and 6 were significant (p<0.05). Conclusion: Different instrumentation systems had effect on the obturation quality of bioceramic material.