Study compares dentine penetration ability of root canal sealers and obturation methods
KIRIKKALE, Turkey: It is known that some microorganisms can penetrate dentinal tubules and sometimes even survive effective irrigation solutions. At this stage, using a penetrable root canal sealer is critically important for entombing microorganisms inside tubules to achieve antimicrobial activity. A research team at Kirikkale University has investigated the penetration depth of four sealers using different obturation methods to determine which is the most effective.
For the in vitro study, 84 single‐rooted teeth were instrumented with the F4 ProTaper Universal rotary file and filled with AH26 and AH Plus (Dentsply DeTrey), RealSeal (SybronEndo), and MTA Fillapex (Angelus) using the cold lateral condensation and single‐cone obturation techniques. Thereafter, the roots were sectioned longitudinally and prepared for scanning electron microscope evaluation of the maximum and minimum penetration depth of the sealers into the dentinal tubules at the apical, middle and cervical thirds, and the average depth of sealer penetration was calculated.
The results show that there was no statistical difference between the obturation methods. However, among the sealers themselves, AH26 was significantly affected by the different obturation methods. Also, the results revealed a significant difference between the root thirds. The AH26 and RealSeal sealers had the highest penetration values with cold lateral condensation and single‐cone obturation techniques, respectively. The obturation method did not affect the penetration extent of the sealers. RealSeal demonstrated better penetration ability than the other sealers. The apical third of the root in all the groups showed the lowest penetration depth.
In an interview with Dental Tribune International, co-author Dr Ali Turkyilmaz said: “The findings of our study were generally similar to those reported in the literature and greatly support those of previous studies. We have emphasised the deep penetration ability of the RealSeal sealer once again. Another result is that the new-generation root canal sealer (MTA Fillapex) achieved a favourable outcome in terms of penetration.”
Turkyilmaz continued by saying that this study provides a basis for further research in order to investigate to what extent the penetration of MTA Fillapex and/or RealSeal reaches the bacteria located in dentinal tubules. This could involve confocal scanning or a similar technique and could lead to finding the best obturation technique for greater penetration of these sealers.
The study, titled “Comparison of dentin penetration ability of different root canal sealers used with different obturation methods”, was published on 31 July 2020 in Microscopy Research and Technique.