Grazziotin-Soares Renata, Nekoofar Mohammad H, Davies Thomas, Hübler Roberto, Meraji Naghmeh, Dummer Paul M H
College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada.
Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Aust Endod J. 2019 Apr;45(1):26-32. doi: 10.1111/aej.12226. Epub 2017 Aug 30.
Chemical comparisons of powder and hydrated forms of calcium silicate cements (CSCs) and calculation of alterations in tricalcium silicate (Ca SiO ) calcium hydroxide (Ca(OH) ) are essential for understanding their hydration processes. This study aimed to evaluate and compare these changes in ProRoot MTA, Biodentine and CEM cement. Powder and hydrated forms of tooth coloured ProRoot MTA, Biodentine and CEM cement were subjected to X-ray diffraction (XRD) analysis with Rietveld refinement to semi-quantitatively identify and quantify the main phases involved in their hydration process. Data were reported descriptively. Reduction in Ca SiO and formation of Ca(OH) were seen after the hydration of ProRoot MTA and Biodentine; however, in the case of CEM cement, no reduction of Ca SiO and no formation of Ca(OH) were detected. The highest percentages of amorphous phases were seen in Biodentine samples. Ettringite was detected in the hydrated forms of ProRoot MTA and CEM cement but not in Biodentine.
硅酸钙水门汀（CSCs）粉末状和水合形式的化学比较以及硅酸三钙（CaSiO）、氢氧化钙（Ca(OH)）变化的计算对于理解其水化过程至关重要。本研究旨在评估和比较ProRoot MTA、Biodentine和CEM水门汀中的这些变化。对牙齿颜色的ProRoot MTA、Biodentine和CEM水门汀的粉末状和水合形式进行了X射线衍射（XRD）分析，并采用Rietveld精修法半定量识别和量化其水化过程中涉及的主要物相。数据采用描述性报告。ProRoot MTA和Biodentine水化后观察到CaSiO减少和Ca(OH)形成；然而，对于CEM水门汀，未检测到CaSiO减少和Ca(OH)形成。在Biodentine样品中观察到非晶相的百分比最高。在ProRoot MTA和CEM水门汀的水合形式中检测到钙矾石，但在Biodentine中未检测到。
