Abstract
During obturation, air voids are undesirable as they may provide shelter for microorganisms or passage for fluids. This study aimed to compare the occurrence of voids between three calcium silicate-based sealers (CSBSs) (MTA-Fillapex, BioRoot-RCS, Bio-C) and the change in their volume after aging. In addition, we aimed to compare voids when using two sealer application methods: lentulo-spiral (LS) and gutta-percha (GP) cone. Thirty extracted mandibular premolars (n = 30) were endodontically prepared and obturated using single GP cone (SGPC) technique. Each sealer was applied to 10 teeth (n = 10) using LS or GP. Micro-computed tomography (micro-CT) was used to quantify the volume of root filling and voids before and after 8-week storage in a phosphate-rich medium. The percentage of root filling and voids were compared between the groups using a Mann–Whitney U test and Kruskal–Wallis test with a Bonferroni correction. Before aging, the percentages of root filling volume after obturation were comparable with no significant differences between sealers (p = 0.325) or application methods (p = 0.950). After aging, the voids’ volume increased significantly in all sealers (p ≤ 0.05). However, no significant differences were found between sealers (p = 0.302). In conclusion, voids in CSBSs may not reduce in size with aging; hence, SGPC should be carefully selected for suitable cases.
Highlights
Compared with other root filling techniques, no significant differences in the percentage of voids were reported with single GP cone (SGPC) when used with
Within the limitations of the current study, sealer preparation and application methods into the canal did not seem to affect the quality of the root filling when performed with
All tested calcium silicate-based sealers (CSBSs) exhibited a significant increase in their voids volume after 2-month storage in a phosphate-rich medium
Summary
Root canal treatment aims to prevent the occurrence, or further progress, of periradicular disease This is achieved by disinfecting and sealing the root canal spaces striving to entomb microorganisms that survived chemo-mechanical preparation [1]. This exhibits the pivotal role of obturation in determining the treatment outcome by providing a proper seal for the prepared root canal system [2,3]. Such a seal must isolate the remaining pathogens isolated from nutritious fluids that may percolate through permeable spaces and voids in the filled canal [4]. No conclusive evidence has been provided to support the superiority of any of the available root canal filling materials or techniques [7]
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