Kaufman A Y, Tagger M, Katz A, Yosef A
J Endod. 1989 Feb;15(2):68-71. doi: 10.1016/S0099-2399(89)80110-4.
Calcium hydroxide-containing root canal sealers may encourage apical obturation by cementum. Hard-setting bases with calcium hydroxide induce calcification, but set too quickly to permit lateral condensation of gutta-percha. Since thermatic compaction requires less time than lateral condensation, the possibility of using this method with Life as a sealer was investigated. Seventy roots were prepared and filled with gutta-percha using the Engine Plugger for thermatic compaction. In one group of 20 Life was used as a sealer. AH26 was used in another group of 20. The remainder served as controls. Leakage was tested by linear penetration of Procion B Blue dye measured after clearing the teeth. In the Life group the mean dye penetration was 0.575 mm versus 1.025 mm in AH26, but the difference was not statistically significant. The results indicated that Life could be used in thermatic compaction of gutta-percha and that it provided a seal comparable to that obtained with AH26.
含氢氧化钙的根管封闭剂可能会促进牙骨质根尖充填。含氢氧化钙的硬固性垫底材料会诱导钙化，但凝固速度过快，无法进行牙胶侧向加压充填。由于热压充填所需时间比侧向加压充填少，因此研究了将Life作为封闭剂使用这种方法的可能性。制备了70颗牙根，使用发动机充填器进行热压充填，并用牙胶充填。在一组20颗牙根中，使用Life作为封闭剂。在另一组20颗牙根中使用AH26。其余作为对照。通过在清理牙齿后测量普施安蓝染料的线性渗透来测试渗漏情况。在Life组中，染料平均渗透为0.575毫米，而在AH26组中为1.025毫米，但差异无统计学意义。结果表明，Life可用于牙胶热压充填，并且它提供的封闭效果与AH26相当。
