Koçak M M, Çiçek E, Koçak S, Sağlam B C, Yılmaz N
Department of Endodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey.
Int Endod J. 2015 Mar;48(3):283-6. doi: 10.1111/iej.12313. Epub 2014 Jun 25.
To assess and compare the amount of extruded debris after canal preparation using ProTaper Universal and ProTaper Next files.
Forty extracted mandibular premolars with single canals and of similar lengths were instrumented using the ProTaper Universal F3 or the ProTaper Next X3. The extruded debris during instrumentation was collected into pre-weighed Eppendorf tubes. The tubes were stored in an incubator for 5 days. The tubes were weighed to obtain the final dry weight of the extruded debris. The amount of apically extruded debris was calculated by subtracting the initial weight of the tube from the final weight. The distribution of the data was examined using the Shapiro-Wilks test. Continuous variables were compared with an independent-samples t-test for two groups.
All specimens were associated with apical debris extrusion. The ProTaper Universal group produced a significantly greater amount of debris extrusion (P < 0.001). The lowest and highest amounts of debris for PTU and PTN groups were recorded as 0.00117-0.00165 g and 0.00017-0.00067 g, respectively.
ProTaper Next files was associated with significantly less extruded apical debris when compared to ProTaper Universal files.
评估并比较使用ProTaper Universal锉和ProTaper Next锉进行根管预备后挤出碎屑的量。
选取40颗单根管且长度相似的拔除下颌前磨牙，分别使用ProTaper Universal F3锉或ProTaper Next X3锉进行根管预备。预备过程中挤出的碎屑收集到预先称重的Eppendorf管中。将管子置于培养箱中5天。之后对管子称重以获得挤出碎屑的最终干重。通过用最终重量减去管子的初始重量来计算根尖挤出碎屑的量。使用Shapiro-Wilks检验来检查数据的分布情况。两组的连续变量采用独立样本t检验进行比较。
所有标本均伴有根尖碎屑挤出。ProTaper Universal组产生的碎屑挤出量显著更多（P < 0.001）。ProTaper Universal组（PTU）和ProTaper Next组（PTN）的最低和最高碎屑量分别记录为0.00117 - 0.00165克和0.00017 - 0.00067克。
与ProTaper Universal锉相比，ProTaper Next锉根尖挤出的碎屑明显更少。
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