PDF(Pubmed)
Abstract：
Background: 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. Methods: The actual working lengths of 120 freshly extracted human single-rooted teeth were measured and compared with their working lengths using 3 rd generation (Root ZX) followed by 6 th 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. Results: 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. Conclusions: 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.
摘要：
背景：成功的根管治疗受根管预备的根尖范围和最终的根管充填的影响。达到完整的工作长度，直到根尖收缩，通常比解剖顶点短0.5-1毫米，至关重要。使用电子顶点定位器更准确地检测工作长度。市场上有六代电子顶点定位器。没有充分研究使用每个顶点定位器选择适当的灌溉以确定准确的工作长度。方法：在干介质中使用第3代（RootZX），然后使用第6代（Raypex6）顶点定位器，测量了120颗新拔除的人类单根牙齿的实际工作长度，并将其与工作长度进行了比较。5.25%次氯酸钠的存在，和2%的氯己定,没有冠状预扩张和冠状预扩张后使用相同的灌溉介质。收集数据,列表，然后使用单因素方差分析和事后分析，以评估实际工作长度之间平均工作长度的显着差异，根ZX,和Raypex6顶点定位器工作长度精度。结果：在冠状预扩张的根中显示出明显的结果，并且使用Raypex6顶点定位器在干介质中测量了它们的工作长度。使用根ZX顶点定位器时，最准确的结果出现在冠状预扩张的根部,并且在使用氯己定冲洗溶液时测量其工作长度.结论：得出的结论是，了解要与每个特定的电子顶点定位器一起使用的特定灌溉介质对于实现最准确的工作长度结果非常重要。
