Abstract
The objective of root canal obturation is to achieve a fluid-tight seal. Recently, GuttaFlow bioseal (GB), a root canal sealer composed of polydimethylsiloxane, gutta-percha particles, and bioactive glass ceramics, has been developed, to enhance the sealing ability of root canal filling material. The objective of this study was to assess the sealing ability of GB using a subnanoliter-scaled fluid-flow measuring device and to compare with that of AH Plus (AH). The fluid flow in root canal-filled teeth using either gutta-percha cone (GP) with AH (GAR; n = 10) or GP with GB (GBR; n = 10) and in GP inserted in AH blocks (GA; n = 10) or GP inserted in GB blocks (GB; n = 10) was measured. In addition, fluid flow in sealer blocks of AH (A; n = 10) and GB (B; n = 10), which served as negative controls, was measured. Root canal-filled teeth using GP without any sealer (GR) acted as positive controls (n = 10). The leakage was obtained by calculating the volume of moved water by time (s), after stabilization of the fluid flow was achieved. Statistical analysis was performed using the Kruskal–Wallis test and Mann–Whitney U-test with Bonferroni correction. A p value less than 0.00238 (0.05/21) was considered significantly different. The mean leakages (nL/s) in the groups are as follows: GAR, 0.0958 ± 0.0543; GBR, 0.0223 ± 0.0246; GA, 0.0644 ± 0.0803; GB, 0.0267 ± 0.0182; A, 0.0055 ± 0.0057; B, 0.0052 ± 0.005; and GR, 0.2892 ± 0.3018. The mean leakage in the GBR group was lower than that in the GAR group (p = 0.001), while the mean leakages in the GA and GB groups were not significantly different. GuttaFlow bioseal can be useful in single-cone obturation technique.
Highlights
Root canal treatment is the process of cleaning, shaping, and obturating the root canal system
A graph representative of fluid flow in each group is shown in Figure 3, and the median and interquartile range of leakages are shown in Table 2 and Figure 4. e leakage was determined as the slope of fluid flow to time (s) graph, after the stabilization of fluid flow. e negative control groups showed the lowest leakage, and no statistically significant difference was observed between the two sealers (p 0.912)
No significant differences in leakage were observed among the GBR, GuttaFlow bioseal (GB), and GA groups
Summary
Root canal treatment is the process of cleaning, shaping, and obturating the root canal system. Traditional GP with sealer did not provide an impervious seal of the root canal system; new obturation materials and techniques have been developed over the past decades to obtain an optimum seal in the root canal system [3, 4]. E aim of this study was to measure the leakage at the interface of GuttaFlow bioseal and GP and that of GuttaFlow bioseal and root dentin using the NFMD and to compare the sealing ability of GuttaFlow bioseal with the AH Plus root canal sealer. E materials used in this study were the AH Plus (Dentsply DE Trey, Konstanz, Germany) and GuttaFlow bioseal root canal sealers and GP points (Meta Biomed, Cheongju, Republic of Korea).
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