The purpose of this study was to examine the effect of heating on the physical properties of four types of premixed calcium silicate-based root canal sealers. Endoseal MTA, Well-Root ST, EndoSequence BC Sealer, EndoSequence BC Sealer HiFlow, and AH Plus (epoxy resin root canal sealer) were heated at 100°C for 1 min, and changes in setting time, flow, and film thickness were evaluated in accordance with ISO 6876:2012 standards. In addition, pH measurement and scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analyses of the set materials were performed. All root canal sealers heated at 100°C showed significant decreases in setting time and flow, particularly Endoseal MTA. In addition, the film thickness of Endoseal MTA increased significantly after heating at 100°C. The pH and SEM/EDS results were not affected by heating. Heating calcium silicate-based root canal sealers accelerated setting time, decreased flow, and increased film thickness. However, the degree of these changes varied among the products. The present findings indicate that heat-induced changes in the physical properties of calcium silicate-based root canal sealers could adversely affect the quality of warm vertical condensation technique.

这项研究的目的是检查加热对四种类型的预混合硅酸钙基根管封闭剂的物理性能的影响。将Endoseal MTA，Well-Root ST，EndoSequence BC Sealer，EndoSequence BC Sealer HiFlow和AH Plus（环氧树脂根管封闭剂）在100°C下加热1分钟，并评估凝固时间，流量和膜厚的变化符合ISO 6876：2012标准。此外，还对凝固的材料进行了pH测量和扫描电子显微镜（SEM）以及能量色散X射线光谱（EDS）分析。所有加热至100°C的根管封闭剂的凝固时间和流量均明显减少，尤其是Endoseal MTA。另外，在100℃加热后，Endoseal MTA的膜厚度显着增加。pH和SEM / EDS结果不受加热的影响。加热硅酸钙基根管封闭剂可加快凝固时间，减少流量并增加膜厚。但是，这些变化的程度因产品而异。目前的发现表明，热诱导的基于硅酸钙的根管封闭剂物理性质的变化可能会对温暖的垂直凝结技术的质量产生不利影响。