Chaudhary Sanjeeb, Gharti Archana, Adhikari Bhawana
Department of Conservative Dentistry and Endodontics, School of Dental Sciences, Chitwan Medical College, Bharatpur, Nepal.
Clin Cosmet Investig Dent. 2018 May 22;10:75-82. doi: 10.2147/CCIDE.S158882. eCollection 2018.
A key factor affecting the success of endodontic treatment is correct determination of root canal working length (WL). The purpose of this in vivo study was to compare the accuracy of Propex II and iPex II electronic apex locator (EAL) in determining the WL under clinical conditions, to that of radiographic working length (RWL) using stainless steel (SS) and nickel-titanium (NiTi) hand files.
Thirty-seven patients, with 60 anterior teeth (60 canals) scheduled for endodontic treatment participated in this study after ethical approval. Electronic working length (EWL) was determined by the Propex II and iPex II according to manufacturer's instructions using SS Hand K-files and NiTi Hand files. RWL was determined after EWL determination. The results obtained with each EAL with SS and NiTi files were compared with RWL. Data was analyzed statistically at a significance level of < 0.05. Interclass correlation coefficient was calculated.
Statistical analysis revealed no significant difference between the EALs, indicating similar accuracies between them with respect to accuracy in determining the WL ( > 0.05). No significant difference was found between the EWL and RWL and between SS and NiTi files for WL determination ( > 0.05) as well. The result also displayed a high intraclass correlation coefficient between the RWL and EWL measurement methods.
Under the in vivo clinical conditions of this study, both Propex II and iPex II were similar to the RWL determination technique showing high correlation to RWL. Both are clinically acceptable EAL for WL determination and both SS hand K-file and NiTi file can be used interchangeably without compromising the WL during treatment.
影响根管治疗成功的一个关键因素是正确确定根管工作长度（WL）。本体内研究的目的是比较Propex II和iPex II电子根尖定位仪（EAL）在临床条件下确定WL的准确性与使用不锈钢（SS）和镍钛（NiTi）手动锉的放射学工作长度（RWL）的准确性。
37例计划进行根管治疗的患者（60颗前牙，60个根管）在获得伦理批准后参与了本研究。使用SS手用K锉和NiTi手用锉，按照制造商的说明，通过Propex II和iPex II确定电子工作长度（EWL）。在确定EWL后确定RWL。将每种EAL使用SS和NiTi锉获得的结果与RWL进行比较。数据在显著性水平<0.05下进行统计学分析。计算组内相关系数。
统计分析显示EAL之间无显著差异，表明它们在确定WL的准确性方面相似（>0.05）。在确定WL时，EWL与RWL之间以及SS和NiTi锉之间也未发现显著差异（>0.05）。结果还显示RWL和EWL测量方法之间具有较高的组内相关系数。
在本研究的体内临床条件下，Propex II和iPex II均与RWL确定技术相似，与RWL具有高度相关性。两者都是临床上可接受的用于确定WL的EAL，并且SS手用K锉和NiTi锉均可互换使用，在治疗过程中不会影响WL。
