Nevares Giselle, Romeiro Kaline, Albuquerque Diana, Xavier Felipe, Fogel Howard, Freire Laila, Cunha Rodrigo
Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Camaragibe, PE, Brazil.
Division of Endodontics, College of Dentistry, University of Manitoba, Winnipeg, MB, Canada.
Iran Endod J. 2017 Summer;12(3):323-328. doi: 10.22037/iej.v12i3.15850.
To compare the apical extrusion of debris produced during root obturating material removal from severely curved root canals using either Reciproc (REC) or ProTaper Next (PTN) systems.
Twenty-six mesial canals of lower molars were instrumented, filled and allocated into two groups (=13). Micro-computed tomographic images were performed to determine the root canal configuration (Vertucci's type IV) and initial volume of obturation. One Eppendorf tube was assigned per canal and weighed (10g) before and after removal of the obturating material. The difference between the initial and final weights was calculated and statistically evaluated.
Apical extrusion of debris was confirmed in all samples, and the mean amount of apical extrusion was similar between both groups (0.061±0.014 g in PTN 0.065±0.016 g in REC samples) (<0.05).
Both systems caused apical extrusion of debris with no differences between PTN and REC systems.
比较使用Reciproc（REC）或ProTaper Next（PTN）系统从严重弯曲的根管中去除根充材料时产生的碎屑的根尖挤出情况。
对26颗下颌磨牙的近中根管进行预备、充填，并分为两组（每组13颗）。进行微计算机断层扫描图像以确定根管形态（Vertucci IV型）和初始充填体积。每条根管分配一个Eppendorf管，在去除根充材料前后称重（10克）。计算初始重量和最终重量之间的差异并进行统计学评估。
所有样本均证实有碎屑的根尖挤出，两组之间根尖挤出的平均量相似（PTN组为0.061±0.014克，REC组为0.065±0.016克）（P<0.05）。
两种系统均导致碎屑的根尖挤出，PTN和REC系统之间无差异。
