Yahya Eman M, Alchalabi Ashraf S, Alkhalidi Emad Farhan
Department of Conservative Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq.
J Int Soc Prev Community Dent. 2024 Jun 27;14(3):211-217. doi: 10.4103/jispcd.jispcd_192_23. eCollection 2024 May-Jun.
An accurate working length (WL) estimation is fundamental to a successful endodontic therapy. The objective of this comparative research was to investigate the performance of iPex II and the Root ZX Mini electronic apex locators (EALs) in measuring root canal WL with different irrigant solutions and their relation to the electrical conductivity of irrigation solutions.
Seventy sound permanent lower premolar teeth, each with a single root and developed apices, were used. Under an X15 stereomicroscope, the real working length was determined with the aid of a #10 file. After that, teeth were placed into an alginate model, and the iPex II and Root ZX Mini were used for the detection of electronic working length with various irrigants. Seventy teeth were randomly distributed into seven groups, 10 per each group (group I: dry canal; group II: distilled water; group III: ozonated water; group IV: 5% sodium hypochlorite (NaOCl); group V: 2% chlorhexidine, group VI: 17% ethylenediaminetetraacetic acid (EDTA) solution, and group VII: 17% EDTA gel). The difference in WL was calculated by deducting real working length from its electronic working length. The study also evaluates the electrical conductivity of the seven endodontic irrigant solutions. The two-way analysis of variance (ANOVA) test was used for statistical analysis.
Statistically, neither both types of EALs ( = 0.088) nor various irrigating solutions with varying electrical conductivities ( = 0.099) significantly affect the accuracy of EL estimation.
There were no significant differences between the accuracy of the Root ZX Mini and the iPex II. The accuracy of both apex locators is unaffected in the presence of various irrigation solutions with varying electrical conductivities in this research.
准确的工作长度（WL）估计是成功进行牙髓治疗的基础。本比较研究的目的是调查iPex II和Root ZX Mini电子根尖定位仪（EALs）在使用不同冲洗液测量根管工作长度时的性能，以及它们与冲洗液电导率的关系。
使用70颗完好的下颌恒前磨牙，每颗牙均为单根且根尖发育完全。在X15立体显微镜下，借助10号锉确定实际工作长度。之后，将牙齿放入藻酸盐模型中，使用iPex II和Root ZX Mini用不同冲洗液检测电子工作长度。70颗牙齿随机分为7组，每组10颗（第一组：干燥根管；第二组：蒸馏水；第三组：臭氧水；第四组：5%次氯酸钠（NaOCl）；第五组：2%氯己定；第六组：17%乙二胺四乙酸（EDTA）溶液；第七组：17% EDTA凝胶）。通过用电子工作长度减去实际工作长度来计算工作长度的差异。该研究还评估了七种牙髓冲洗液的电导率。采用双向方差分析（ANOVA）检验进行统计分析。
从统计学角度来看，两种类型的电子根尖定位仪（P = 0.088）以及具有不同电导率的各种冲洗液（P = 0.099）均未显著影响工作长度估计的准确性。
Root ZX Mini和iPex II的准确性之间没有显著差异。在本研究中，当存在具有不同电导率的各种冲洗液时，两种根尖定位仪的准确性均不受影响。
