Endodontic Department, Faculty of Dentistry, The British University in Egypt, 81-11-11 El-Rehab, Cairo, 11841, Egypt.
Center for Innovative Dental Sciences, The British University in Egypt, El Sherouk City, Egypt.
Sci Rep. 2023 Sep 8;13(1):14829. doi: 10.1038/s41598-023-41798-8.
This study aimed to evaluate the thermal, chemical, and physical properties of VDW.1Seal, Fill Root ST, and ADseal sealers. Thermal properties were analyzed using Thermogravimetric analysis (TGA) and Differential thermal analysis (DTA). Attenuated total reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR) analysis was performed as a complementary test to confirm TGA/DTA analysis. The chemical composition of the set sealer material was identified using an X-ray powder diffraction (XRD) system. Other physical properties of each sealer were investigated; ten specimens were used to measure the solubility (at 24 h and 28 days), and another ten specimens were used to assess pH changes and calcium ion release (after 7 and 14 days). Film thickness was done according to ISO 6876 specs. The data were analyzed using the two-way ANOVA test. Results showed that for all sealers, TGA analysis revealed a direct relationship between sealer mass loss and temperature rise. In addition, the decomposition of the tested sealers started at 145 °C, 135 °C and 91 °C for VDW.1Seal, ADseal sealer, and Fill Root ST, respectively. XRD analysis revealed a higher degree of crystallinity for VDW.1Seal and ADseal. ADseal showed the least solubility; VDW.1Seal exhibited the highest alkalinity, calcium ion release, and the lowest film thickness.
本研究旨在评估 VDW.1Seal、Fill Root ST 和 ADseal 密封剂的热学、化学和物理性能。使用热重分析（TGA）和差示热分析（DTA）分析热学性能。衰减全反射傅里叶变换红外光谱（ATR-FTIR）分析作为 TGA/DTA 分析的补充测试进行。使用 X 射线粉末衍射（XRD）系统确定凝固密封剂材料的化学成分。还研究了每种密封剂的其他物理性能；使用十个样本测量溶解度（在 24 小时和 28 天），另外十个样本用于评估 pH 值变化和钙离子释放（在 7 天和 14 天之后）。根据 ISO 6876 规范进行膜厚度测量。使用双向方差分析（ANOVA）对数据进行分析。结果表明，对于所有密封剂，TGA 分析显示密封剂质量损失与温度升高之间存在直接关系。此外，测试密封剂的分解始于 145°C、135°C 和 91°C，分别对应于 VDW.1Seal、ADseal 密封剂和 Fill Root ST。XRD 分析表明 VDW.1Seal 和 ADseal 具有更高的结晶度。ADseal 的溶解度最低；VDW.1Seal 的碱性最高、钙离子释放量最高、膜厚度最低。
