Hammad Mohammad, Qualtrough Alison, Silikas Nick
School of Dentistry, University of Manchester, Manchester, United Kingdom.
School of Dentistry, University of Manchester, Manchester, United Kingdom.
J Endod. 2008 Nov;34(11):1370-1373. doi: 10.1016/j.joen.2008.07.024. Epub 2008 Aug 28.
The aim of this study was to measure the remaining filling volume of different obturation materials from root-filled extracted teeth by using 2 removal techniques. Eighty single-rooted teeth were collected and decoronated, and the root canal was prepared by using the ProTaper nickel-titanium rotary files. The teeth were randomly allocated into 4 groups, and each group was obturated by using a different material. Group 1 was filled with gutta-percha and TubliSeal sealer, group 2 was filled with EndoRez points and EndoRez sealer, group 3 was filled with RealSeal points and RealSeal sealer, and Group 4 was filled with a gutta-percha point and GuttaFlow sealer. Teeth were scanned with a micro-computed tomography scan, and then root fillings were removed by using ProTaper retreatment files or hand K-files. Teeth were scanned again, and volume measurements were carried out with micro-computed tomography software. Statistical analysis showed significant differences between the 2 removal techniques for gutta-percha and for both techniques between gutta-percha and the other groups. The present study showed that all tested filling materials were not completely removed during retreatment by using hand or rotary files. Gutta-percha was more efficiently removed by using hand K-files.
本研究的目的是通过两种去除技术测量来自根管充填后拔除牙齿的不同充填材料的剩余充填体积。收集80颗单根牙并去除冠部，使用ProTaper镍钛旋转锉预备根管。将牙齿随机分为4组，每组使用不同材料进行充填。第1组用牙胶尖和TubliSeal封闭剂充填，第2组用EndoRez尖和EndoRez封闭剂充填，第3组用RealSeal尖和RealSeal封闭剂充填，第4组用牙胶尖和GuttaFlow封闭剂充填。用微型计算机断层扫描对牙齿进行扫描，然后使用ProTaper再治疗锉或手动K锉去除根管充填物。再次对牙齿进行扫描，并使用微型计算机断层扫描软件进行体积测量。统计分析表明，牙胶尖的两种去除技术之间以及牙胶尖与其他组的两种技术之间存在显著差异。本研究表明，在再治疗过程中，使用手动或旋转锉并不能完全去除所有测试的充填材料。使用手动K锉能更有效地去除牙胶尖。
