Abstract
Objective
Bioceramic-containing root canal sealers promote periapical healing via Ca2+ and OH− release and apatite formation on the surface. This study aimed to compare Ca2+ and OH− release and in vivo apatite formation of three bioceramic-containing root canal sealers: EndoSequence BC sealer (Endo-BC), MTA Fillapex (MTA-F), and Nishika Canal Sealer BG (N-BG).
Materials and methods
Polytetrafluoroethylene tubes filled with sealers were immersed in distilled water for 6 and 12 h and for 1, 7, 14, and 28 days to measure Ca2+ and OH− release. Additionally, tubes filled with sealers were implanted in the backs of rats for 28 days, and in vivo apatite formation was analyzed using an electron probe microanalyzer.
Results
Endo-BC released significantly more Ca2+ than the other sealers at 6 and 12 h and 1 day. Ca2+ release was significantly lower from N-BG than from Endo-BC and MTA-F at 14 and 28 days. OH− release was significantly higher from Endo-BC than from the other sealers throughout the experiment, except at 1 day. OH− release was lower from N-BG than from MTA-F at 6 h and 7 days. Only Endo-BC implants exhibited apatite-like calcium-, phosphorus-, oxygen-, and carbon-rich spherulites and apatite layer–like calcium- and phosphorus-rich, but radiopaque element-free, surface regions.
Conclusions
Ca2+ and OH− release is ranked as follows: Endo-BC > MTA-F > N-BG. Only Endo-BC demonstrated in vivo apatite formation.
Clinical relevance
Endo-BC could promote faster periapical healing than MTA-F and N-BG.
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Acknowledgements
This work was the result of using research equipment in CCRF, Niigata University. We thank Ms. Ayako Ikarashi for providing technical support. We thank Edanz Group (https://en-author-services.edanz.com/ac) for editing a draft of this manuscript.
Funding
The work was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (no. 19K19020 to N.E.).
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RSI Belal and N Edanami contributed to the conception, design, data acquisition, analysis, and interpretation, and drafted and critically revised the manuscript. N Yoshiba, N Ohkura, and S Takenaka contributed to data acquisition and critically revised the manuscript. K Yoshiba and Y Noiri contributed to data interpretation and critically revised the manuscript.
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All experiments were reviewed and approved by the Committee on the Guidelines for Animal Experimentation of Niigata University (approval number: SA 00365). All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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Belal, R.S.I., Edanami, N., Yoshiba, K. et al. Comparison of calcium and hydroxyl ion release ability and in vivo apatite-forming ability of three bioceramic-containing root canal sealers. Clin Oral Invest 26, 1443–1451 (2022). https://doi.org/10.1007/s00784-021-04118-w
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DOI: https://doi.org/10.1007/s00784-021-04118-w