Yared G M, Dagher F B, Machtou P
Department of Research, Dental School, Lebanese University, Beirut, Lebanon.
J Endod. 1997 Mar;23(3):146-8. doi: 10.1016/S0099-2399(97)80263-4.
The purpose of this study was to compare the quality of the coronal seal of lateral and vertical condensations after removal of the coronal gutta-percha with two different techniques. One hundred single-rooted human teeth with one root canal were used. After cleaning and shaping, the teeth were divided into 4 equal groups. In groups 1, 3 and 2, 4 vertical and lateral condensations were performed respectively. Then, the coronal portion of gutta-percha was removed with heat-carriers alone for groups 1 and 2 and with heat-carriers and compaction for groups 3 and 4. Apical microleakage was determined using pressurized fluid filtration measured at different time intervals up to 24 wk. The results showed that the alternation of heat-carriers and compaction enhances the quality of the coronal seal. The obturation with the vertical condensation technique resulted in a better seal independently of the gutta-percha removal technique.
本研究的目的是采用两种不同技术，比较去除冠部牙胶后侧向加压和垂直加压充填的冠部封闭质量。使用了100颗单根单根管的人牙。在清理和预备根管后，将牙齿平均分为4组。第1组、第3组分别进行4次垂直加压和侧向加压充填。然后，第1组和第2组仅用热载体去除冠部牙胶，第3组和第4组用热载体和压实去除冠部牙胶。使用加压流体过滤法在长达24周的不同时间间隔测定根尖微渗漏。结果表明，热载体和压实交替使用可提高冠部封闭质量。无论采用何种牙胶去除技术，垂直加压充填技术的封闭效果均更佳。
