Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O Box 1982, Dammam, 31411, Saudi Arabia.
College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31411, Saudi Arabia.
F1000Res. 2023 Oct 24;12:533. doi: 10.12688/f1000research.133288.3. eCollection 2023.
Successful root canal treatment is influenced by the apical extent of root canal preparation and the eventual root canal filling. Achieving the full working length until the apical constriction, which is usually 0.5 - 1 mm shorter than the anatomical apex, is crucial. Electronic apex locators were used to detect the working length more accurately. There are six generations of electronic apex locators in the market. The selection of the appropriate irrigation with each apex locator for accurate working length determination is not fully investigated. The actual working lengths of 120 freshly extracted human single-rooted teeth were measured and compared with their working lengths using 3 generation (Root ZX) followed by 6 generation (Raypex 6) apex locators in dry medium, presence of 5.25% sodium hypochlorite, and 2% chlorhexidine, without coronal pre-flaring and after coronal pre-flaring using the same irrigating media. Data were collected, tabulated, and afterward analyzed using one-way ANOVA with post-hoc to evaluate the significant difference in average working length between actual working length, Root ZX, and Raypex 6 apex locator working lengths accuracy. The significant results were shown in roots that were coronally pre-flared and their working lengths were measured in a dry medium using Raypex 6 apex locator. While using the Root ZX apex locator, the most accurate results were shown in roots that were coronally pre-flared and their working lengths were measured while using a chlorhexidine irrigating solution. It is concluded that it is very important to know the specific irrigating medium to be used with each specific electronic apex locator to achieve the most accurate working length results.
根管治疗的成功与否受根管预备的根尖范围和最终根管充填的影响。达到根尖缩窄处的工作长度（通常比解剖根尖短 0.5-1 毫米）至关重要。电子根尖定位仪可更准确地检测工作长度。市场上有六代电子根尖定位仪。对于准确确定工作长度，每种根尖定位仪应选择适当的冲洗液，但尚未对此进行充分研究。本研究测量了 120 颗新鲜拔出的人单根牙的实际工作长度，并与使用第三代（Root ZX）和第六代（Raypex 6）根尖定位仪在干燥介质、5.25%次氯酸钠和 2%洗必泰存在下以及不进行冠向预扩和进行冠向预扩后测量的工作长度进行比较。使用相同的冲洗液。收集数据、制表，然后使用单向方差分析和事后检验评估实际工作长度、Root ZX 和 Raypex 6 根尖定位仪工作长度准确性之间的平均工作长度差异的显著性。在冠向预扩并在干燥介质中使用 Raypex 6 根尖定位仪测量工作长度的根中显示出显著结果。而在使用 Root ZX 根尖定位仪时，在冠向预扩且使用洗必泰冲洗液测量工作长度的根中显示出最准确的结果。结论是，了解每种特定电子根尖定位仪应使用的特定冲洗液对于获得最准确的工作长度结果非常重要。
