Dental Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
Eur Endod J. 2024 Aug 22;9(3):266-272. doi: 10.14744/eej.2023.97769.
Determining the working length (WL) in root canal treatment facilitates the treatment prognosis. The introduction of apex locators and new CBCT devices in dentistry influenced this consideration. This comparative study evaluated the accuracy of working length measurement by cone-beam computed tomography (CBCT) in three fields of view (FOVs), conventional radiography, and the apex locator Raypex 5.
The descriptive-analytical study was performed on 40 lower premolar teeth that met the inclusion criteria. Direct observation under the microscope was considered the gold standard and compared with measurements by the electronic apex locator, CBCT, and periapical images.
The results were analyzed by paired t-tests and Wilcoxon tests. A significance level of 0.05 was considered in this study. CBCT 5×5 FOV with a p-value of 0.733 and analog radiography with a p-value of 0.001 achieved the working lengths with the highest and lowest accuracy, respectively. In addition, the difference between actual and measured working length using analog radiography was significant (p-value <0.05).
According to the results of this study, CBCT images at different FOVs and those taken by the apex locator Raypex 5 can be used as a reliable method for estimating the working length. (EEJ-2023-10-141).
确定根管治疗的工作长度有助于治疗预后。口腔医学中引入了根尖定位仪和新型 CBCT 设备，这影响了对工作长度的考虑。本对比研究评估了三种视野（FOV）下的锥形束计算机断层扫描（CBCT）、传统射线照相和根尖定位仪 Raypex 5 测量工作长度的准确性。
对符合纳入标准的 40 颗下颌前磨牙进行描述性分析研究。显微镜下的直接观察被认为是金标准，并与电子根尖定位仪、CBCT 和根尖片的测量值进行比较。
采用配对 t 检验和 Wilcoxon 检验对结果进行分析。本研究的显著性水平为 0.05。CBCT 5×5 FOV 的 p 值为 0.733，模拟射线照相的 p 值为 0.001，分别具有最高和最低的准确性。此外，模拟射线照相测量的实际工作长度与测量值之间存在显著差异（p 值<0.05）。
根据本研究结果，不同 FOV 的 CBCT 图像和根尖定位仪 Raypex 5 拍摄的图像可以作为估计工作长度的可靠方法。
