Zand Vahid, Rahimi Saeed, Davoudi Paria, Afshang Abubakr
Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, East Azerbaijan, Islamic Republic of Iran.
Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, East Azerbaijan, Islamic Republic of Iran, Phone: +989144045938, e-mail:
J Contemp Dent Pract. 2017 May 1;18(5):383-385. doi: 10.5005/jp-journals-10024-2051.
This ex vivo study evaluated the accuracy of the Root-ZX electronic apex locator (EAL) (J. Morita, Tokyo, Japan) and the NovApex (Forum Technologies, Rishon Lezion, Israel) in determining the working length (WL) during endodontic treatment.
Forty extracted single-rooted human teeth were selected for this study. The actual WL was measured with visual technique by a size #15 k-file under magnification. Then, the canal lengths were measured electronically with both Root-ZX and NovApex apex locators within ±0.5 and ±1 mm. Mean percentage of data was analyzed between groups using paired t-test, with a statistically significant level of p < 0.05.
The accuracy of NovApex apex locator was 85% within ±0.5 mm and 92.5% within ±1 mm. The accuracy of Root-ZX apex locator was 70% within ±0.5 mm and 97.5% within ±1 mm. There was no significant difference between the accuracy of the two EALs.
Both the NovApex and Root-ZX EALs are useful for measuring the WL with high accuracy.
Given the importance of accurate WL determination in the success of endodontic treatments, the accuracy of different apex locators should be evaluated.
本体外研究评估了Root-ZX电子根尖定位仪（EAL）（日本东京森田公司）和NovApex（以色列里雄莱锡安论坛技术公司）在牙髓治疗过程中确定工作长度（WL）的准确性。
本研究选取了40颗拔除的单根人牙。实际工作长度通过在放大条件下用15号K锉采用视觉技术进行测量。然后，使用Root-ZX和NovApex根尖定位仪在±0.5毫米和±1毫米范围内对根管长度进行电子测量。使用配对t检验分析组间数据的平均百分比，统计学显著性水平为p < 0.05。
NovApex根尖定位仪在±0.5毫米范围内的准确率为85%，在±1毫米范围内为92.5%。Root-ZX根尖定位仪在±0.5毫米范围内的准确率为70%，在±1毫米范围内为97.5%。两种电子根尖定位仪的准确率之间无显著差异。
NovApex和Root-ZX电子根尖定位仪在高精度测量工作长度方面均很有用。
鉴于准确确定工作长度对牙髓治疗成功的重要性，应评估不同根尖定位仪的准确性。
