Department of Endodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkey.
Department of Endodontics, Faculty of Dentistry, İzmir Katip Çelebi University, İzmir, Turkey.
Int Endod J. 2016 Apr;49(4):382-5. doi: 10.1111/iej.12461. Epub 2015 May 16.
To evaluate the influence of movement kinematics when using Twisted File Adaptive instruments (SybronEndo, Orange, CA, USA) (TF Adaptive) on the amount of apically extruded debris.
Forty-eight extracted mandibular incisor teeth were selected. The teeth were randomly divided into four groups (n ꞊ 12), and the root canals were instrumented using the following movement kinematics: TF Adaptive motion, 90° clockwise (CW) to 30° counterclockwise (CCW) reciprocating motion, 150°CW to 30°CCW reciprocating motion or continuous rotation. TF Adaptive instruments were used for all groups. Debris extruded apically during instrumentation was collected in pre-weighed Eppendorf tubes, and after drying, the mean weight of the debris was assessed with an electronic balance. The data were analysed statistically using a one-way analysis of variance.
The 90° CW to 30° CCW reciprocating motion produced the highest mean extrusion value, and this was significantly greater when compared with continuous rotation (P < 0.05). 150° CW to 30° CCW reciprocating, adaptive and continuous rotation motions produced similar amounts of debris extrusion (P > 0.05).
Movement kinematics affected the amount of apically extruded debris when using Twisted File Adaptive instruments.
评估使用 Twisted File Adaptive 器械（SybronEndo，Orange，CA，USA）（TF Adaptive）时运动学对根尖挤出物量的影响。
选择 48 颗下颌切牙。将牙齿随机分为四组（n = 12），使用以下运动学进行根管预备：TF Adaptive 运动，顺时针 90°（CW）至逆时针 30°（CCW）往复运动，顺时针 150°CW 至逆时针 30°CCW 往复运动或连续旋转。所有组均使用 TF Adaptive 器械。在器械预备过程中根尖挤出的碎屑用预先称重的 Eppendorf 管收集，干燥后用电子天平评估碎屑的平均重量。使用单向方差分析对数据进行统计学分析。
顺时针 90°CW 至逆时针 30°CCW 往复运动产生的平均挤出值最高，与连续旋转相比显著更高（P < 0.05）。顺时针 150°CW 至逆时针 30°CCW 往复、自适应和连续旋转运动产生的碎屑挤出量相似（P > 0.05）。
使用 Twisted File Adaptive 器械时，运动学影响根尖挤出物的量。
