Tuggle S T, Anderson R W, Pantera E A, Neaverth E J
J Endod. 1989 Mar;15(3):122-4. doi: 10.1016/S0099-2399(89)80132-3.
The apical sealing ability of amalgam, cold-burnished gutta-percha, amalgam with cavity varnish, and SuperEBA cement was evaluated in extracted human teeth. For each experimental group, the roots of 20 single-rooted teeth were sectioned from their crowns. Canals were cleaned, shaped, and obturated with vertically condensed warmed gutta-percha and Kerr Pulp Canal Sealer. Following apical preparation and placement of test materials, root ends were placed in 1% methylene blue dye for 2 wk, after which the roots were sectioned longitudinally, and linear measurements of dye penetration were recorded. Results demonstrated statistically less linear dye penetration in the test group sealed with amalgam and cavity varnish. Statistical differences were not detected among the other test groups.
在拔除的人牙中评估了汞合金、冷加压牙胶、涂有洞漆的汞合金和SuperEBA水门汀的根尖封闭能力。对于每个实验组，从20颗单根牙的牙冠处将牙根截断。根管进行清理、预备，并用垂直加压的热牙胶和 Kerr 牙髓根管封闭剂进行充填。在根尖预备并放置测试材料后，将牙根末端置于1%的亚甲蓝染料中2周，之后将牙根纵向切开，并记录染料渗透的线性测量值。结果表明，用汞合金和洞漆封闭的测试组中，染料的线性渗透在统计学上较少。其他测试组之间未检测到统计学差异。
