Briseño B M, Sonnabend E
Department of Conservative Dentistry, University of Munich.
Int Endod J. 1991 Jan;24(1):15-23. doi: 10.1111/j.1365-2591.1991.tb00865.x.
Nine endodontic instruments from different manufacturers (Reamers, K-files, Hedstrom files, K-Flex files, Flexofiles, S-files, Burns Unifiles, Flexicut files and Flex-R files) were used to prepare 180 simulated root canals in resin blocks. The instrument's ability to reproduce a theoretical pre-established ideal canal shape was assessed by comparing the original canal path with the resulting enlarged canal shape by a double exposure photographic method. The individual ability of each instrument to transport debris was also observed during instrumentation under a stereomicroscope. Regardless of the instrument type, none was able to reproduce ideal results; however, clinically acceptable results could be obtained with all of them. The coronal and apical debris transportation characteristics proved to be similar with all instruments.
使用来自不同制造商的九种根管治疗器械（扩孔钻、K锉、H锉、K-Flex锉、Flexofile锉、S锉、Burns Unifile锉、Flexicut锉和Flex-R锉）在树脂块中制备180个模拟根管。通过双曝光摄影方法，将原始根管路径与扩大后的根管形状进行比较，评估器械再现理论预设理想根管形状的能力。在体视显微镜下进行器械操作时，还观察了每种器械运送碎屑的个体能力。无论器械类型如何，均无法再现理想结果；然而，使用所有这些器械均可获得临床可接受的结果。所有器械的冠部和根尖部碎屑运送特征均相似。
