Saghiri M Ali, Shabani Asal, Asatourian Armen, Sheibani Nader
Department of Dental Materials, Dental Material Research Center, Azad University, Tehran Branch, Tehran, Iran; Departments of Ophthalmology and Visual Sciences, Biomedical Engineering and Cell and Regenerative Biology, University of Wisconsin School of Medicine and Public Health, Madison, WI.
Department of Dental Materials, Azad University, Tehran Branch, Tehran, Iran.
J Clin Diagn Res. 2017 Aug;11(8):ZC116-ZC119. doi: 10.7860/JCDR/2017/28657.10517. Epub 2017 Aug 1.
Calcium silicate-based cements physical properties is influenced by environmental changes.
Here, we intended to evaluate the effect of storage medium on surface porosity of root Mineral Trioxide Aggregate (MTA) and Biodentine cement.
A total of 40 polyethylene tubes were selected and divided into two groups: Group A (MTA) and Group B (Biodentine). Each group was subdivided into two subgroups (n=10). In subgroups A1 and B1, tubes were transferred to Distilled Water (DW), while samples of subgroup A2 and B2 were transferred to Synthetic Tissue Fluid (STF) as storage medium and samples were stored for three days. All specimens were then placed in a desiccator for 24 hours and then subject to surface porosity evaluation by Scanning Electron Microscopy (SEM) at ×500, ×1000, ×2000 and ×5000 magnifications. The number and the surface porosities were determined by Image J analysis. Data were analyzed by ANOVA at level of significance of p<0.05.
The lowest surface porosity was observed in MTA samples stored in STF and the highest was in Biodentine samples stored in DW. Significant differences were noted between groups and subgroups of each group (p< 0.05). MTA samples stored in DW and STF showed significantly lower surface porosities compared to Biodentine samples (p < 0.05).
Storage medium can drastically affect the surface porosity of tested calcium silicate-based cements. However, MTA showed lower surface porosity compared to Biodentine cement, which can result in lower microleakage in applied area.
硅酸钙基水门汀的物理性能受环境变化影响。
在此，我们旨在评估储存介质对根管三氧化矿物凝聚体（MTA）和生物陶瓷水门汀表面孔隙率的影响。
共选取40根聚乙烯管，分为两组：A组（MTA）和B组（生物陶瓷水门汀）。每组再细分为两个亚组（n = 10）。在亚组A1和B1中，将管子转移至蒸馏水（DW）中，而亚组A2和B2的样本转移至合成组织液（STF）中作为储存介质，并将样本储存三天。然后将所有标本置于干燥器中24小时，接着通过扫描电子显微镜（SEM）在500倍、1000倍、2000倍和5000倍放大倍数下进行表面孔隙率评估。通过Image J分析确定孔隙数量和表面孔隙率。数据采用方差分析进行分析，显著性水平为p < 0.05。
在STF中储存的MTA样本表面孔隙率最低，而在DW中储存的生物陶瓷水门汀样本表面孔隙率最高。每组的组间和亚组间均存在显著差异（p < 0.05）。与生物陶瓷水门汀样本相比，在DW和STF中储存的MTA样本表面孔隙率显著更低（p < 0.05）。
储存介质可显著影响所测试的硅酸钙基水门汀的表面孔隙率。然而，与生物陶瓷水门汀相比，MTA的表面孔隙率更低，这可能导致应用区域的微渗漏更低。
