Karagenç Beril, Gençoglu Nimet, Ersoy Mustafa, Cansever Galip, Külekçi Güven
Faculty of Dentistry, Department of Endodontics, Marmara University, Istanbul, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 Jul;102(1):110-3. doi: 10.1016/j.tripleo.2005.10.044. Epub 2006 Mar 30.
The purpose of this study was to compare four different microleakage tests (dye leakage, electrochemical test, bacterial test and fluid filtration) for evaluation of the coronal seal of teeth obturated using Thermafil or lateral condensation techniques.
One hundred forty-four extracted single-rooted teeth were selected and prepared. The specimens were divided into 8 experimental groups. In 4 groups the root canals were filled with Thermafil obturators and in the other 4 groups by the lateral condensation technique. Coronal microleakage was assessed after exposing one group of specimens (n = 15 teeth) from each of the obturation techniques to each of the four microleakage tests.
In the fluid filtration test, lateral condensation showed statistically less leakage than the Thermafil technique (P < .05). Electrochemical and dye leakage test results showed no difference between the two obturation techniques (P < .05). However, in the bacterial leakage test, Thermafil showed less leakage than lateral condensation (P < .05).
There is poor correlation between various methods to evaluate hydraulic leakage. The clinical significance of leakage tests in vitro is questionable.
本研究旨在比较四种不同的微渗漏测试方法（染料渗漏法、电化学测试法、细菌测试法和流体过滤法），以评估采用热牙胶垂直加压充填技术或侧向加压充填技术充填的牙齿的冠部封闭性。
选取144颗拔除的单根牙并进行预备。将标本分为8个实验组。4组根管采用热牙胶垂直加压充填技术充填，另外4组采用侧向加压充填技术充填。将每组充填技术中的一组标本（n = 15颗牙）分别进行四种微渗漏测试，之后评估冠部微渗漏情况。
在流体过滤测试中，侧向加压充填技术显示出的渗漏在统计学上显著少于热牙胶垂直加压充填技术（P < 0.05）。电化学测试和染料渗漏测试结果显示，两种充填技术之间无差异（P < 0.05）。然而，在细菌渗漏测试中，热牙胶垂直加压充填技术显示出的渗漏少于侧向加压充填技术（P < 0.05）。
评估液体渗漏的各种方法之间相关性较差。体外渗漏测试临床意义存疑。
