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J. Korean Ceram. Soc. > Volume 58(3); 2021 > Article
Journal of the Korean Ceramic Society 2021;58(3): 330-336.
doi: https://doi.org/10.1007/s43207-021-00114-8
Hydration behavior and radiopacity of strontium substituted Ca3SiO5 cement
JinSu You1, Jun-Sang Yoo2, Kee-Yeon Kum3, Seong-Hyeon Hong1
1Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Korea
2Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul 04608, Korea
3Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul 03080, Korea
Correspondence  Seong-Hyeon Hong ,Email: shhong@snu.ac.kr
Received: December 3, 2020; Revised: January 27, 2021   Accepted: February 2, 2021.  Published online: May 31, 2021.
This study reports a facile method to synthesize the calcium silicate-based cement with an enhanced radiopacifying performance. Sr-substituted Ca3SiO5 (Ca3−xSrxSiO5, x = 0.0 ~ 0.2) was prepared by solid-state reaction, and its phase, hydration behavior, and radiopacity were investigated and compared with those of 10 wt% Bi2O3-added Ca3SiO5. A nearly single-phase Ca3SiO5 was synthesized at 1400 °C and the solubility limit of Sr into Ca3SiO5 was approximately 3.3 mol % (x = 0.1). The Sr substitution did not affect the size and morphology of Ca3SiO5 powder. The extent of hydration was slightly delayed in Sr-substituted Ca3SiO5, but the hydration products were the same composing of fiber-like calcium silicate hydrate (C–S–H) and plate-like calcium hydroxide (Ca(OH)2). The radiopacity of Ca3SiO5 was significantly enhanced with Sr substitution and it was slightly higher than that of Bi2O3-added Ca3SiO5 at a similar concentration. Consequently, Sr-substituted Ca3SiO5 can be a promising dental root canal filling material with an improved radiopacifying property.
Key words: Sr-substituted Ca3SiO5 · Mineral trioxide aggregate · Radiopacity · Cement · Hydration
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