Zadsirjan Saeede, Dehkordi Negar Parvaneh, Heidari Soolmaz, Najafi Farhood, Zargar Nazanin, Feli Mojgan, Salimnezhad Sepideh
Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Operative Dentistry, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Int J Dent. 2024 Jan 25;2024:8875014. doi: 10.1155/2024/8875014. eCollection 2024.
The positive effects of strontium on dental and skeletal remineralization have been confirmed in the literature. This study aimed to assess the properties of a calcium silicate cement (CSC) containing a sintered strontium silicate phase.
The calcium silicate and strontium silicate phases were synthesized by the sol-gel technique. Strontium silicate powder in 0 (CSC), 10 (CSC/10Sr), 20 (CSC/20Sr), and 30 (CSC/30Sr) weight percentages was mixed with calcium silicate powder. Calcium chloride was used in the liquid phase. X-ray diffraction (XRD) of specimens was conducted before and after hydration. The setting time and compressive strength were assessed at 1 and 7 days after setting. The set discs of the aforementioned groups were immersed in the simulated body fluid (SBF) for 1 and 7 days. The ion release profile was evaluated by inductively coupled plasma-optical emission spectrometry (ICP-OES). Biomineralization on the specimen surface was evaluated by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). Data were analyzed by the Kolmogorov-Smirnov test, one-way and mixed ANOVA, Levene's test, and LSD post hoc test ( < 0.05).
Except for an increasement in the peak intensity of hydrated specimens, XRD revealed no other difference in the crystalline phases of hydrated and nonhydrated specimens. The compressive strength was not significantly different at 1 and 7 days in any group ( > 0.05). The setting time significantly decreased by an increase in percentage of strontium ( < 0.05). Release of Ca and Si ions significantly decreased by an increase in percentage of strontium ( < 0.05). SEM/EDS showed the formation of calcium phosphate deposits at 1 and 7 days.
Incorporation of 10-30 wt% sintered strontium silicate phase as premixed in CSC can significantly decrease the setting time without compromising the compressive strength or biomineralization process of the cement.
锶对牙齿和骨骼再矿化的积极作用已在文献中得到证实。本研究旨在评估含有烧结硅酸锶相的硅酸钙水泥（CSC）的性能。
采用溶胶 - 凝胶技术合成硅酸钙相和硅酸锶相。将重量百分比为0（CSC）、10（CSC/10Sr）、20（CSC/20Sr）和30（CSC/30Sr）的硅酸锶粉末与硅酸钙粉末混合。氯化钙用于液相。在水化前后对试样进行X射线衍射（XRD）分析。在凝固后1天和7天评估凝固时间和抗压强度。将上述组的凝固圆盘在模拟体液（SBF）中浸泡1天和7天。通过电感耦合等离子体发射光谱法（ICP - OES）评估离子释放曲线。通过扫描电子显微镜/能量色散X射线光谱法（SEM/EDS）评估试样表面的生物矿化。数据通过Kolmogorov - Smirnov检验、单因素和混合方差分析、Levene检验以及LSD事后检验进行分析（P < 0.05）。
XRD显示，除了水化试样的峰值强度增加外，水化和未水化试样的晶相没有其他差异。在任何组中，1天和7天时的抗压强度均无显著差异（P > 0.05）。凝固时间随锶百分比的增加而显著缩短（P < 0.05）。钙和硅离子的释放量随锶百分比的增加而显著降低（P < 0.05）。SEM/EDS显示在1天和7天时形成了磷酸钙沉积物。
在CSC中预混10 - 30 wt%的烧结硅酸锶相可显著缩短凝固时间，而不影响水泥的抗压强度或生物矿化过程。
