Department of Restorative Dentistry, Dental Materials Division, University of Campinas, Piracicaba, Brazil.
J Endod. 2013 Jul;39(7):915-8. doi: 10.1016/j.joen.2013.04.015. Epub 2013 May 22.
The aim of this study was to evaluate and compare several physicochemical properties including working and setting times, flow, solubility, and water absorption of a recent calcium silicate-based sealer (MTA Fillapex; Angelus, Londrina, Brazil) and an epoxy resin-based sealer (AH Plus; Dentsply, Konstanz, Germany).
The materials were handled following the manufacturer's instructions. The working time and flow were tested according to ISO 6876:2001 and the setting time according to American Society for Testing and Materials C266. For solubility and water absorption tests, the materials were placed into polyvinyl chloride molds (8 × 1.6 mm). The samples (n = 10 for each material and test) were placed in a cylindrical polystyrene-sealed container with 20 mL deionized water at 37°C. At 1, 7, 14, and 28 days, the samples were removed from the solutions and blotted dry for solubility and water absorption tests. The data were analyzed using 1-way analysis of variance with the Tukey test (P < .05).
MTA Fillapex showed the lowest values of flow, working and setting times, solubility, and water absorption (P < .05). The solubility and water absorption increased significantly over time for both materials in a 1- to 28-day period (P < .05).
MTA Fillapex showed suitable physical properties to be used as an endodontic sealer.
本研究旨在评估和比较几种物理化学性质，包括一种新型硅酸钙基封闭剂（MTA Fillapex；Angelus，Londrina，巴西）和一种环氧树脂基封闭剂（AH Plus；Dentsply，Konstanz，德国）的工作时间和凝固时间、流动性、溶解度和吸水性。
按照制造商的说明处理材料。工作时间和流动性根据 ISO 6876：2001 进行测试，凝固时间根据美国材料试验协会 C266 进行测试。对于溶解度和吸水性测试，将材料放入聚氯乙烯模具（8×1.6mm）中。将（n=10 个每种材料和测试）样品放入带有 20mL 去离子水的圆柱形聚苯乙烯密封容器中，在 37°C 下放置。在 1、7、14 和 28 天，从溶液中取出样品并擦干进行溶解度和吸水性测试。使用单因素方差分析和 Tukey 检验（P<0.05）分析数据。
MTA Fillapex 显示出最低的流动性、工作时间和凝固时间、溶解度和吸水性（P<0.05）。在 1 到 28 天的时间内，两种材料的溶解度和吸水性均显著增加（P<0.05）。
MTA Fillapex 显示出适合用作根管封闭剂的物理性质。
