Department of Metallurgy and Materials Engineering, Faculty of Engineering, University of Malta, Msida, Malta.
Dent Mater. 2013 Feb;29(2):e20-8. doi: 10.1016/j.dental.2012.11.007. Epub 2012 Nov 27.
Tricalcium silicate-based cements have been displayed as suitable root-end filling materials. The physical properties of prototype radiopacified tricalcium silicate cement, Bioaggregate and Biodentine were investigated. Intermediate restorative material was used as a control.
The physical properties of a prototype zirconium oxide replaced tricalcium silicate cement and two proprietary cements composed of tricalcium silicate namely Bioaggregate and Biodentine were investigated. Intermediate restorative material (IRM) was used as a control. Radiopacity assessment was undertaken and expressed in thickness of aluminum. In addition the anti-washout resistance was investigated using a novel basket-drop method and the fluid uptake, sorption and solubility were investigated using a gravimetric method. The setting time was assessed using an indentation technique and compressive strength and micro-hardness of the test materials were investigated. All the testing was performed with the test materials immersed in Hank's balanced salt solution.
All the materials tested had a radiopacity value higher than 3mm thickness of aluminum. IRM exhibited the highest radiopacity. Biodentine demonstrated a high washout, low fluid uptake and sorption values, low setting time and superior mechanical properties. The fluid uptake and setting time was the highest for Bioaggregate.
The addition of admixtures to tricalcium silicate-based cements affects the physical properties of the materials.
硅酸三钙基水泥已被证明是一种合适的根管充填材料。本研究旨在研究原型放射增强硅酸三钙水泥、生物骨料和比多汀的物理性能。以中间修复材料作为对照。
研究了一种氧化锆取代硅酸三钙水泥和两种以硅酸三钙为主要成分的专有水泥（生物骨料和比多汀）的物理性能。以中间修复材料（IRM）作为对照。进行了射线可检测性评估，并以铝的厚度表示。此外，还采用了一种新的篮筐-滴落法研究了抗冲洗能力，采用重量法研究了流体吸收、吸附和解吸。采用压痕技术评估凝固时间，研究了试验材料的抗压强度和显微硬度。所有测试均在试验材料浸入 Hank's 平衡盐溶液的情况下进行。
所有测试材料的射线可检测性值均高于 3mm 厚的铝。IRM 表现出最高的射线可检测性。比多汀表现出高冲洗性、低流体吸收和吸附值、短凝固时间和优越的机械性能。生物骨料的流体吸收和凝固时间最高。
向硅酸三钙基水泥中添加外加剂会影响材料的物理性能。
