Pawar Ajinkya M, Pawar Mansing G, Metzger Zvi, Kokate Sharad R
Department of Conservative Dentistry and Endodontics, Dnyandeo Yashwantrao Patil Dental School and Hospital, Lohegaon, Pune, India.
Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Mumbai, India.
J Conserv Dent. 2015 Mar-Apr;18(2):89-93. doi: 10.4103/0972-0707.153057.
The present ex vivo study aimed to evaluate the debris extrusion after instrumenting the root canals by three different files systems.
Sixty extracted human mandibular premolars with single canals were selected and randomly divided into three groups (n = 20) for instrumentation with three different files. Group 1: WaveOne (primary) single reciprocating file (WO; Dentsply Maillefer, Ballaigues, Switzerland) (25/08), Group 2: Self-adjusting file (SAF; ReDent-Nova, Ra'anana, Israel) (1.5 mm), and Group 3: ProTaper NEXT X1 and X2 (PTN; Dentsply Tulsa Dental, Tulsa, OK) (25/06). Debris extruding by instrumentation were collected into pre-weighed Eppendorf tubes. These tubes were then stored in an incubator at 70°C for 5 days. The tubes were then weighed to obtain the final weight, with the extruded debris. Statistical analysis for the debris extruded apically was performed using one-way analysis of variance and post hoc Tukey's test.
The statistical analysis showed a significant difference between all the three groups tested (P < 0.01). The following post hoc Tukey's test confirmed that Group 2 (SAF) exhibited significantly least (P < 0.01) debris extrusion between the three groups tested.
The SAF resulted in significantly less extrusion of debris when compared to reciprocating WO and rotary PTN.
本体外研究旨在评估三种不同锉系统对根管进行预备后碎屑的挤出情况。
选取60颗拔除的单根管人下颌前磨牙，随机分为三组（n = 20），分别用三种不同的锉进行预备。第1组：WaveOne（初级）单往复锉（WO；登士柏迈徕福，瑞士拜莱格）（25/08），第2组：自调式锉（SAF；ReDent-Nova，以色列拉阿南纳）（1.5毫米），第3组：ProTaper NEXT X1和X2（PTN；登士柏塔尔萨牙科，美国俄克拉何马州塔尔萨）（25/06）。预备过程中挤出的碎屑收集到预先称重的艾本德管中。然后将这些管子在70°C的培养箱中保存5天。之后对管子进行称重以获得最终重量，即挤出碎屑的重量。对根尖挤出的碎屑进行统计分析，采用单因素方差分析和事后Tukey检验。
统计分析显示，所有三组之间存在显著差异（P < 0.01）。随后的事后Tukey检验证实，在测试的三组中，第2组（SAF）的碎屑挤出量显著最少（P < 0.01）。
与往复式WO和旋转式PTN相比，SAF导致的碎屑挤出量显著更少。
