Faculty of Pharmacy and Health, University of Travnik, Travnik, Bosnia; Faculty of Dentistry, University Business Academy, Novi Sad, Serbia.
Laboratory for Anthropology, Institute for Anatomy, School of Medicine, University of Belgrade, Belgrade, Serbia; Laboratory for Atomic Physics, Institute for Nuclear Science "Vinca", University of Belgrade, Belgrade, Serbia.
J Endod. 2018 May;44(5):816-821. doi: 10.1016/j.joen.2017.09.022. Epub 2018 Jan 12.
The outcome of periapical surgery has been directly improved with the introduction of novel material formulations. The aim of the study was to compare the retrograde obturation quality of the following materials: calcium silicate (Biodentine; Septodont, Saint-Maur-des-Fosses, France), mineral trioxide aggregate (MTA+; Cerkamed Company, Stalowa Wola, Poland), and glass ionomer cement (Fuji IX; GC Corporation, Tokyo, Japan).
Materials' wettability was calculated concerning the contact angles of the cements measured using a glycerol drop. Cements' porosity was determined using mercury intrusion porosimetry and micro-computed tomographic (μCT) imaging. Extracted upper human incisors were retrofilled, and μCT analysis was applied to calculate the volume of the gap between the retrograde filling material and root canal dentin. Experiments were performed before and after soaking the materials in simulated body fluid (SBF).
No statistically significant differences were found among the contact angles of the studied materials after being soaked in SBF. The material with the lowest nanoporosity (Fuji IX: 2.99% and 4.17% before and after SBF, respectively) showed the highest values of microporosity (4.2% and 3.1% before and after SBF, respectively). Biodentine had the lowest value of microporosity (1.2% and 0.8% before and after SBF, respectively) and the lowest value of microgap to the root canal wall ([10 ± 30] × 10 mm).
Biodentine and MTA possess certain advantages over Fuji IX for hermetic obturation of retrograde root canals. Biodentine shows a tendency toward the lowest marginal gap at the cement-to-dentin interface.
新型材料配方的引入直接改善了根尖手术后的效果。本研究旨在比较以下材料的逆向填充质量：硅酸钙（Biodentine；Septodont，圣莫里斯 - 德福斯，法国）、三氧化矿物聚合体（MTA+；Cerkamed Company，斯塔洛瓦沃拉，波兰）和玻璃离子水门汀（Fuji IX；GC 公司，东京，日本）。
通过甘油滴测量的水泥接触角来计算材料的润湿性。使用压汞法和微计算机断层扫描（μCT）成像来确定水泥的孔隙率。提取的人类上切牙进行逆行填充，然后应用 μCT 分析计算逆行填充材料与根管牙本质之间的间隙体积。在模拟体液（SBF）浸泡前后进行实验。
在 SBF 浸泡后，研究材料的接触角之间没有发现统计学上的显著差异。具有最低纳米孔隙率的材料（Fuji IX：浸泡前后分别为 2.99%和 4.17%）显示出最高的微孔孔隙率（浸泡前后分别为 4.2%和 3.1%）。Biodentine 的微孔孔隙率最低（浸泡前后分别为 1.2%和 0.8%），与根管壁的微间隙最低（[10 ± 30]×10mm）。
与 Fuji IX 相比，Biodentine 和 MTA 在逆行根管的密封填充方面具有一定的优势。Biodentine 显示出在水泥与牙本质界面处最低边缘间隙的趋势。
