Blum J Y, Machtou P, Micallef J P
School of Dentistry, University of Montpellier, France.
J Endod. 1998 Apr;24(4):223-8. doi: 10.1016/S0099-2399(98)80100-3.
The aim of this study was to use a force analyzer device, the modified Endographe with a new cupule, to compare the forces and wedging effects developed in the root canal using four obturation techniques: warm vertical compaction, lateral condensation, thermomechanical compaction, and Thermafil condensation. The different methods--that varied in instrumentation, duration, and compaction load--were studied from graphs representing the force application sequences. In addition, the graphs resulting from modifications in technique (such as using an undersized spreader and pluggers that were either too small or too big) and deliberately induced failures in technique (by use of a too small condenser or a too small master cone) were studied. The mean values for the wedging effect for warm vertical compaction, lateral condensation, thermomechanical compaction, and Thermafil condensation were, respectively, 0.65 +/- 0.07 kg, 0.8 +/- 0.1 kg, 0.6 +/- 0.08 kg, and 0.03 +/- 0.01 kg. The use of graphs provides a new approach to the analysis of obturation techniques.
本研究的目的是使用一种力分析仪设备，即带有新型吸盘的改良型Endographe，通过四种根管充填技术：热垂直加压、侧向加压、热机械加压和Thermafil加压，比较根管内产生的力和楔入效果。从代表力施加顺序的图表中研究了在器械使用、持续时间和加压负荷方面存在差异的不同方法。此外，还研究了技术改变（如使用尺寸过小的扩孔钻和过短或过长的充填器）以及故意造成的技术失误（使用过小的充填器或过小的主尖）所产生的图表。热垂直加压、侧向加压、热机械加压和Thermafil加压的楔入效果平均值分别为0.65±0.07千克、0.8±0.1千克、0.6±0.08千克和0.03±0.01千克。图表的使用为充填技术的分析提供了一种新方法。
