Koo Jina, Kwak Sang Won, Kim Hyeon-Cheol
Department of Conservative Dentistry, Pusan National University School of Dentistry, Dental and Life Science Institute, Dental Research Institute, Yangsan, South Korea.
J Dent Sci. 2023 Jul;18(3):1042-1046. doi: 10.1016/j.jds.2022.11.029. Epub 2022 Dec 10.
BACKGROUND/PURPOSE: Recently introduced calcium silicate-based bioceramic (CSBC) sealers require moisture for setting, thus this study aimed to compare the setting times of epoxy resin-and CSBC sealers under different test conditions.
Four CSBC sealers (CeraSeal, EndoSeal TCS, One-Fil, and Well-Root ST) were compared to an epoxy resin-based sealer (AH Plus). Each sealer was placed in a stainless-steel and gypsum molds on a glass slide. Sealer samples (n = 10 per group) were stored in an incubator at 95% humidity and 37 °C. A Gilmore needle with a total weight of 100 g and a 2.0-mm diameter were carefully placed vertically against the sealer, and the setting time was recorded when the needle no longer formed an indentation on the sealer surface. Statistical analysis was performed using two-way analysis of variance and Tukey parametric tests. The level of significance was set at 95%.
The setting time of all sealers in gypsum molds was significantly shorter than that in stainless-steel molds ( < 0.05). While AH Plus showed the longest setting time, EndoSeal TCS, One-Fil, and CeraSeal showed the shortest setting times when using gypsum molds among the five sealer types ( < 0.05).
The results of this study indicate that CSBC sealers require moisture for setting; a lack of moisture results in a significant delay in setting time. Because the root canals contain moisture, it is necessary to experiment with the setting time of all types of sealers using gypsum molds to determine the biological condition of root canals.
背景/目的：最近推出的硅酸钙基生物陶瓷（CSBC）封闭剂在凝固时需要水分，因此本研究旨在比较环氧树脂封闭剂和CSBC封闭剂在不同测试条件下的凝固时间。
将四种CSBC封闭剂（CeraSeal、EndoSeal TCS、One-Fil和Well-Root ST）与一种环氧树脂基封闭剂（AH Plus）进行比较。每种封闭剂分别置于载玻片上的不锈钢模具和石膏模具中。封闭剂样本（每组n = 10）储存在湿度为95%、温度为37°C的培养箱中。将总重量为100 g、直径为2.0 mm的吉尔摩针小心垂直放置在封闭剂上，当针在封闭剂表面不再形成压痕时记录凝固时间。采用双向方差分析和Tukey参数检验进行统计分析。显著性水平设定为95%。
所有封闭剂在石膏模具中的凝固时间均显著短于在不锈钢模具中的凝固时间（P < 0.05）。虽然AH Plus的凝固时间最长，但在五种封闭剂类型中，使用石膏模具时EndoSeal TCS、One-Fil和CeraSeal的凝固时间最短（P < 0.05）。
本研究结果表明，CSBC封闭剂在凝固时需要水分；缺乏水分会导致凝固时间显著延迟。由于根管内含有水分，有必要使用石膏模具对所有类型封闭剂的凝固时间进行实验，以确定根管的生物学状况。
