2016 Volume 59 Issue 6 Pages 463-471
Purpose: Root canal filling sealer requires good operability, root canal sealing ability, and high biocompatibility with periapical tissue. However, at present, there are no sealers that satisfy these requirements. A sealer showing ideal physico-chemical characteristics and biocompatibility as a biological material, to induce proper wound healing of the periapical tissue after root canal treatment, needs to be developed. In this study, we examined the sealing abilities of a newly developed bioactive glass-based sealer (BG-based sealer) and existing sealers, and their effects on root canal dentin.
Methods: After filling human extracted teeth by each sealer (eugenol-based, non-eugenol-based, bioceramic-based, and BG-based sealer), the sealing ability of each sealer was examined by the dye leakage test, and the sealer/dentin interface was analyzed by FE-SEM and EDX.
Results: The amount of dye leakage of BG-based sealer was significantly less than those of the other sealers. FE-SEM analysis of the BG-based sealer and bioceramic-based sealer showed the formation of hydroxyapatite-like crystals in the dentinal tubules.
Conclusion: The root canal sealing ability of BG-based sealer may result from the formation of hydroxyapatite-like crystals in the dentinal tubules, suggesting that BG-based sealer may be useful as a root canal filling sealer.
