Department of Endodontics, Faculty of Dentistry, Inonu University.
Department of Endodontics, Faculty of Dentistry, Selcuk University.
Dent Mater J. 2020 Aug 2;39(4):601-607. doi: 10.4012/dmj.2018-429. Epub 2020 Mar 24.
The aim of this study was to evaluate the physical properties of calcium-silicate based cements as retrograde filling in different pH and blood conditions using micro-CT. Eighty-four teeth were obturated and after root-end resection, 3 mm-deep root-end cavity was ultrasonically prepared. The samples were divided into four test groups (n=21). Cements were freshly prepared and analyzed with micro-CT before and after exposed. The test groups were exposed for four days to environments containing acid, alkali, or blood. An acidic pH significantly reduced the volume of all materials after four days and differed from the other environments. Biodentine has the highest percentage of loss in volume and density after treatment in an acidic environment. Porosity formation in the acidic medium was observed in Biodentine amongst all materials. The three-dimensional structures of all materials changed after exposed to an acidic pH, while fewer changes were observed in the structures of materials treated with blood and alkali.
本研究旨在使用微 CT 评估不同 pH 值和血液条件下硅酸钙基水泥作为逆行填充的物理性能。84 颗牙齿被填塞，在根尖切除后，用超声仪在根尖处制备 3mm 深的根尖腔。将样本分为四个实验组（n=21）。新鲜制备的水泥在暴露前后进行微 CT 分析。实验组在含有酸、碱或血液的环境中暴露四天。四天后，酸性 pH 值显著降低了所有材料的体积，与其他环境不同。在酸性环境中，比多粘菌素的体积和密度损失百分比最高。在所有材料中，在酸性介质中观察到比多粘菌素形成孔隙。所有材料的三维结构在暴露于酸性 pH 值后发生变化，而在血液和碱性处理的材料结构中观察到的变化较少。
