体外评估 3 种电子根尖定位仪在不同环境下的准确性：一项微计算机断层扫描研究。
Ex Vivo Evaluation of the Accuracy of 3 Electronic Apex Locators in Different Environments: A Micro-Computed Tomography Study.
机构信息
Private Practice Limited to Endodontics, Ortoperio Dental Clinic, Kayseri, Turkey.
Erciyes University, Faculty of Dentistry, Department of Endodontics, Kayseri, Turkey.
出版信息
Eur Endod J. 2020 Dec;5(3):226-230. doi: 10.14744/eej.2020.30633.
OBJECTIVE
The aim of this study was to compare the accuracy of three electronic apex locators (EALs) (Propex Pixi, Mini Root ZX, Raypex 5) in determining working length (WL) under different environments (existence of blood-pulp/sodium hypochlorite in root canal space) using micro-computed tomography (micro-CT) measurements.
METHODS
Twenty-five single-rooted human teeth that were scheduled for extraction were selected for the study. Measurements were performed with the Propex Pixi, Mini Root ZX, Raypex 5 in vivo conditions in the presence of NaOCl irrigant solution or blood-pulp tissue. After that the teeth were extracted and scanned using micro-CT. The measurements of WL obtained with the different EALs in different environments were statistically compared. Significance was set at P<0.05.
RESULTS
There were no significant differences among the WL measurements performed with EALs or micro CT groups under different clinical enviroments. All EALs tested gave reliable results in respect to apical constriction.
CONCLUSION
The accuracy of the tested EALs is not affected by pulp tissues and blood or NaOCl.
目的
本研究旨在比较三种电子根尖定位仪（EAL）（Propex Pixi、Mini Root ZX、Raypex 5）在使用微计算机断层扫描（micro-CT）测量时，在不同环境（根管内存在牙髓/次氯酸钠）下确定工作长度（WL）的准确性。
方法
选择 25 颗拟拔除的单根人牙进行研究。在存在 NaOCl 冲洗液或牙髓组织的情况下，对 Propex Pixi、Mini Root ZX、Raypex 5 进行体内测量。然后将牙齿取出并用 micro-CT 扫描。在不同的临床环境下，用不同的 EAL 获得的 WL 测量值进行统计学比较。显著性水平设为 P<0.05。
结果
在不同的临床环境下，EAL 或 micro CT 组的 WL 测量值之间没有显著差异。所有测试的 EAL 在根尖缩窄方面都给出了可靠的结果。
结论
测试的 EAL 的准确性不受牙髓组织、血液或 NaOCl 的影响。
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