MacDonald A, Moore B K, Newton C W, Brown C E
Department of Edodontics, Indiana University, School of Dentistry, Indianapolis 46202, USA.
J Endod. 1994 Dec;20(12):598-604. doi: 10.1016/S0099-2399(06)80085-3.
A self-setting apatite cement, EBA cement, and amalgam with varnish were tested for root end sealing ability using a fluid filtration and dye technique. Single-rooted human teeth were prepared in vitro to receive root end fillings. Experimental groups were amalgam with two layers of varnish, EBA cement with dry cavity, EBA cement within a wet cavity, apatite cement within a dry cavity, and apatite cement within a wet cavity. Fluid filtration measurements were made at 6, 24, and 7 days, and 1 and 3 months. Each specimen was also subjected to a dye leakage test using Procion Green dye at 3 months. Results indicated that apatite cement provided a comparable seal to amalgam and EBA cement. This finding, in conjunction with its excellent biocompatibility, suggests that apatite cement is an acceptable alternative to present-day root end filling materials.
采用液体过滤和染色技术，对一种自固化磷灰石水泥、EBA 水泥以及涂有清漆的汞合金的根尖封闭能力进行了测试。在体外对单根人牙进行预备以接受根尖充填。实验组包括涂有两层清漆的汞合金、干燥窝洞内的 EBA 水泥、潮湿窝洞内的 EBA 水泥、干燥窝洞内的磷灰石水泥以及潮湿窝洞内的磷灰石水泥。在 6 天、24 天、7 天、1 个月和 3 个月时进行液体过滤测量。每个标本在 3 个月时还使用 Procion Green 染料进行了染料渗漏试验。结果表明，磷灰石水泥提供了与汞合金和 EBA 水泥相当的封闭效果。这一发现，连同其优异的生物相容性，表明磷灰石水泥是当今根尖充填材料的一种可接受的替代品。
