ストロンチウムシリケート系シーラーの物理的および機械的特性
Shannon Wong1, Xiaofei Zhu1, Tun-Yi Hsu1
1Department of Endodontics, Boston University Henry M. Goldman School of Dental Medicine, Boston, MA, USA.
Odontology
|January 25, 2026
まとめ
ストロンチウムシリケート(Sr-Si)根管充填材は、カルシウムシリケート系充填材と比較して、優れた流動性と象牙細管への浸透性を示した。これらの結果は、Sr-Si充填材が根管治療において有望な物理的および機械的特性を持つことを示唆している。
科学分野:
- 根管治療学
- 歯科材料科学
- 生体材料
背景:
- 根管充填材は根管充填において重要である。
- カルシウムシリケート系シーラーは広く使用されている。
- ストロンチウムシリケートシーラーのような新規材料の評価は、根管治療成績の改善に不可欠である。
研究 の 目的:
- 新規ストロンチウムシリケート(Sr-Si)シーラーと従来のカルシウムシリケート系(Ca-Si)シーラーの物理的および機械的特性を比較すること。
- シーラーの流動性、設定時間、膜厚、放射線不透過性、および象牙細管への浸透性を評価すること。
主な方法:
- 元素組成はエネルギー分散型X線分光法(EDS)で分析した。
- 粒子サイズは走査型電子顕微鏡(SEM)で評価した。
- 流動性、設定時間、膜厚、放射線不透過性については、標準ISO 6876/2012試験を実施した。
- 象牙細管への浸透をシミュレートするために、カスタム圧力流動試験を実施した。
- 抜去歯を用いてシーラーの浸透をSEMで観察した。
主要な成果:
- Sr-Siシーラーは、Ca-Siシーラーと比較して、著しく良好な流動性と放射線不透過性を示した。
- シミュレートされた象牙細管へのSr-Siシーラーの流動開始に必要な力は、Ca-Siシーラーよりも低かった(11.00 N vs. 21.51 N)。
- SEM分析により、Ca-Siシーラーと比較して、Sr-Siシーラーの象牙細管への浸透がより深いことが確認された。
結論:
- Sr-Siシーラーは、in vitro基準に従って、良好な物理的および機械的特性を有している。
- 流動性と浸透性の向上は、臨床的な利点の可能性を示唆している。
- 長期的な臨床適合性を確認するためには、さらなる臨床試験が必要である。
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