基于甲基丙烯酸酯树脂的根管封闭剂的吸水性和溶解性
Water sorption and solubility of methacrylate resin-based root canal sealers.
作者信息
Donnelly Adam, Sword Jeremy, Nishitani Yoshihiro, Yoshiyama Masahiro, Agee Kelli, Tay Franklin R, Pashley David H
机构信息
Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912-1129, USA.
出版信息
J Endod. 2007 Aug;33(8):990-4. doi: 10.1016/j.joen.2006.03.021.
The water sorption and solubility characteristics of three contemporary methacrylate resin-based endodontic sealers, EndoREZ, Epiphany, and InnoEndo, were compared with those obtained from Kerr EWT, Ketac-Endo (positive control), GuttaFlow, and AH Plus (both negative controls). Ten disks of each material were dehydrated in Drierite for 24 h and weighed to constant dry mass. They were placed in water and weighed periodically until maximum water sorption was obtained. The disks were dehydrated again to determine their mass loss (solubility) at equilibrium. Epiphany exhibited the highest apparent water sorption (8%) followed by Ketac-Endo (6.2%), InnoEndo (3.4%), EndoREZ (3.0%), AH Plus (1.1%), GuttaFlow (0.4%), and Kerr EWT (0.3%). Significantly higher solubility (3.5-4%) were observed for all three methacrylate resin-based sealers and Kerr EWT (3.95%), compared with Ketac-Endo (1.6%), AH Plus (0.16%), and GuttaFlow (0.13%). American Dental Association specifications require<3% solubility for endodontic sealers. Only Ketac-Endo, AH Plus, and GuttaFlow met that criterion.
比较了三种当代甲基丙烯酸酯树脂基根管封闭剂EndoREZ、Epiphany和InnoEndo的吸水和溶解特性，与从Kerr EWT、Ketac-Endo（阳性对照）、GuttaFlow和AH Plus（均为阴性对照）获得的特性进行比较。每种材料的十个圆盘在干燥剂中脱水24小时并称重至恒定干质量。将它们置于水中并定期称重，直至获得最大吸水量。圆盘再次脱水以确定其在平衡时的质量损失（溶解度）。Epiphany表现出最高的表观吸水量（8%），其次是Ketac-Endo（6.2%）、InnoEndo（3.4%）、EndoREZ（3.0%）、AH Plus（1.1%）、GuttaFlow（0.4%）和Kerr EWT（0.3%）。与Ketac-Endo（1.6%）、AH Plus（0.16%）和GuttaFlow（0.13%）相比，所有三种甲基丙烯酸酯树脂基封闭剂和Kerr EWT（3.95%）的溶解度明显更高（3.5 - 4%）。美国牙科协会规范要求根管封闭剂的溶解度<3%。只有Ketac-Endo、AH Plus和GuttaFlow符合该标准。
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