School of Dentistry, University of Liverpool, Pembroke Place, Liverpool, L3 5PS, UK.
Br Dent J. 2011 Dec 23;211(12):595-8. doi: 10.1038/sj.bdj.2011.1052.
To evaluate the ability of apex locators as a tool in determining working length in comparison to traditional working length radiographs in general dental practice.
Randomised controlled clinical trial.
General dental practices in the North West of England.Subjects Adults requiring root canal treatment of at least one tooth with minimal or moderate difficulty.
Root canal treatment was carried out with the working length determined by apex locator in the treatment group (AL), and periapical radiograph in the control group (PA).
The acceptability of the master cone gutta percha measured from a radiograph before obturation was used as the primary outcome.
Twenty-one of 23 fillings in the AL group were judged as acceptable, compared to 17 of 23 fillings in the PA group. This difference was not statistically significant.
In general dental practice, no significant difference was found in working length determined using apex locator combined with a master cone GP radiograph or using the conventional method. There is a need for larger trials to investigate these methods further.
评估在一般牙科实践中，与传统工作长度射线照相相比，根尖定位仪作为确定工作长度的工具的能力。
随机对照临床试验。
英格兰西北部的一般牙科诊所。
需要对至少一颗牙齿进行根管治疗的成年人，这些牙齿的根管治疗具有最小或中等难度。
治疗组（AL）使用根尖定位仪确定工作长度，对照组（PA）使用根尖片。
以根管填充前从射线照相上测量的主牙胶尖的可接受性作为主要结果。
AL 组 23 个填充物中有 21 个被认为是可接受的，而 PA 组 23 个填充物中有 17 个被认为是可接受的。这种差异没有统计学意义。
在一般牙科实践中，使用根尖定位仪结合主牙胶尖 GP 射线照相或使用传统方法确定工作长度没有发现显著差异。需要更大的试验来进一步研究这些方法。
