Altundasar Emre, Nagas Emre, Uyanik Ozgur, Serper Ahmet
Department of Endodontics, Faculty of Dentistry, Hacettepe University, Sıhhiye, Ankara, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011 Oct;112(4):e31-5. doi: 10.1016/j.tripleo.2011.03.044. Epub 2011 Jul 20.
The purpose of this study was to compare the amount of apically extruded irrigant using 2 Ni-Ti rotary systems. Forty mandibular premolars with single canals were randomly assigned into 4 groups. Flower arrangement foam cubes were weighed with a precision balance before being attached to the apical portions of all teeth. In group 1, preparation was completed with ProTaper files. In group 2 canals were prepared with RaCe files. In groups 1 and 2, the irrigant was delivered with a 30-gauge conventional dental needle. In groups 3 and 4, teeth were prepared as in groups 1 and 2 with the exception that the irrigant was delivered with a side-vented irrigation needle. The weight of the extruded material (irrigant and debris) for each group was calculated by comparing the pre- and postinstrumentation weights of the foams used for periapical modeling. Obtained data were analyzed by Kruskal-Wallis and Mann-Whitney U tests, with P equals .05 as the level for statistical significance. ProTaper files used with regular needle irrigation had the highest fluid extrusion. The lowest irrigant extrusion was observed with the RaCe system combined with a side-vented irrigation needle. Within the limitations of this study, it can be concluded that irrigation needle and rotary instruments have an effect on the amount of extruded root canal irrigant.
本研究的目的是比较使用两种镍钛旋转系统时根尖部挤出冲洗液的量。将40颗单根管下颌前磨牙随机分为4组。在将插花用泡沫方块附着于所有牙齿的根尖部分之前，用精密天平称重。第1组使用ProTaper锉完成预备。第2组使用RaCe锉预备根管。在第1组和第2组中，冲洗液通过30号传统牙科针输送。在第3组和第4组中，牙齿的预备方式与第1组和第2组相同，不同之处在于冲洗液通过侧孔冲洗针输送。通过比较用于根尖部塑形的泡沫在器械操作前后的重量，计算每组挤出材料（冲洗液和碎屑）的重量。所得数据采用Kruskal-Wallis检验和Mann-Whitney U检验进行分析，以P = 0.05作为统计学显著性水平。使用常规针冲洗时，ProTaper锉挤出的液体最多。使用RaCe系统结合侧孔冲洗针时，冲洗液挤出量最低。在本研究的局限性范围内，可以得出结论，冲洗针和旋转器械对根管冲洗液的挤出量有影响。
