Bürklein S, Benten S, Schäfer E
Central Interdisciplinary Ambulance in the School of Dentistry, University of Münster, Münster, Germany.
Int Endod J. 2014 May;47(5):405-9. doi: 10.1111/iej.12161. Epub 2013 Jul 26.
To assess in a laboratory setting the amount of apically extruded debris associated with different single-file nickel-titanium instrumentation systems compared to one multiple-file rotary system.
Eighty human mandibular central incisors were randomly assigned to four groups (n = 20 teeth per group). The root canals were instrumented according to the manufacturers' instructions using the reciprocating single-file system Reciproc, the single-file rotary systems F360 and OneShape and the multiple-file rotary Mtwo instruments. The apically extruded debris was collected and dried in pre-weighed glass vials. The amount of debris was assessed with a micro balance and statistically analysed using anova and post hoc Student-Newman-Keuls test. The time required to prepare the canals with the different instruments was also recorded.
Reciproc produced significantly more debris compared to all other systems (P < 0.05). No significant difference was noted between the two single-file rotary systems and the multiple-file rotary system (P > 0.05). Instrumentation with the three single-file systems was significantly faster than with Mtwo (P < 0.05).
Under the condition of this study, all systems caused apical debris extrusion. Rotary instrumentation was associated with less debris extrusion compared to reciprocal instrumentation.
在实验室环境下，评估与不同单根镍钛器械系统相比，一种多根旋转器械系统所产生的根尖部挤出碎屑的量。
80颗人下颌中切牙随机分为四组（每组20颗牙）。按照制造商的说明，使用往复式单根器械系统Reciproc、单根旋转器械系统F360和OneShape以及多根旋转器械Mtwo对根管进行预备。将根尖部挤出的碎屑收集起来，在预先称重的玻璃瓶中干燥。用微量天平评估碎屑的量，并使用方差分析和事后Student-Newman-Keuls检验进行统计学分析。还记录了使用不同器械预备根管所需的时间。
与所有其他系统相比，Reciproc产生的碎屑明显更多（P < 0.05）。在两个单根旋转系统和多根旋转系统之间未观察到显著差异（P > 0.05）。使用三种单根系统进行根管预备明显比使用Mtwo更快（P < 0.05）。
在本研究条件下，所有系统均导致根尖部碎屑挤出。与往复式器械相比，旋转器械预备与较少的碎屑挤出相关。
