Singh Abhishek, Arunagiri Doraiswamy, Pushpa Shankarappa, Sawhny Asheesh, Misra Abhinav, Khetan Kirti
Department of Conservative Dentistry and Endodontics, Rama Dental College, Hospital and Research Centre, Kanpur, Uttar Pradesh, India.
J Conserv Dent. 2015 Sep-Oct;18(5):405-8. doi: 10.4103/0972-0707.164055.
The purpose of this ex vivo study was to evaluate and compare the weight of debris and volume of irrigant extruded apically from teeth using different preparation techniques.
Thirty extracted human mandibular premolars with single canals and similar lengths were instrumented using hand ProTaper F2 (25, 0.08; Dentsply Maillefer, Ballaigues, Switzerland), M-two (25, 0.06; VDW, Munich, Germany) and WaveOne Primary (25, 0.08; Dentsply Maillefer, Ballaigues, Switzerland). Debris and irrigant extruded during instrumentation were collected into preweighed Eppendorf tubes. The volume of the irrigant was measured, and then the tubes were stored in an incubator at 70°C for 2 days. The Eppendorf tubes were weighed to obtain the final weight when the extruded debris was included. Three consecutive weights were obtained for each tube.
Data were statistically analyzed by one-way analysis of variance and Student's t-test.
There were no statistically significant differences among the groups. The WaveOne reciprocating system showed the maximum amount of apical extrusion of debris and irrigant among all the groups. The least amount of debris and irrigant was observed in ProTaper hand instrument (P > 0.05).
All instrumentation techniques were associated with debris and irrigant extrusion.
本体外研究的目的是评估和比较使用不同预备技术从牙齿根尖挤出的碎屑重量和冲洗液体积。
选取30颗拔除的单根管、长度相似的人下颌前磨牙，分别使用手用ProTaper F2（25，0.08；登士柏迈斐，瑞士拜莱格）、M-two（25，0.06；VDW，德国慕尼黑）和WaveOne Primary（25，0.08；登士柏迈斐，瑞士拜莱格）进行根管预备。预备过程中挤出的碎屑和冲洗液收集到预先称重的Eppendorf管中。测量冲洗液体积，然后将管子置于70°C培养箱中2天。当包含挤出的碎屑时，称重Eppendorf管以获得最终重量。每个管子连续获得三个重量值。
数据采用单因素方差分析和Student t检验进行统计学分析。
各组之间无统计学显著差异。WaveOne往复系统在所有组中显示出根尖挤出的碎屑和冲洗液量最大。ProTaper手用器械挤出的碎屑和冲洗液量最少（P>0.05）。
所有预备技术均与碎屑和冲洗液挤出有关。
