Апекс-локатор

Apex locators are highly accurate, with modern devices achieving over 95% accuracy in determining root canal working lengths. They use advanced electronic technology to measure the distance to the apical constriction, crucial for successful endodontic treatment. Accuracy can be affected by factors like moisture, irrigants, and metallic restorations in the canal.

Regular calibration and proper usage per manufacturer guidelines are essential to maintain precision. Overall, apex locators are reliable tools that significantly enhance the accuracy and efficiency of root canal procedures.

As long as there is fluid in the root canal, you should not try to use a dental apex locator. This also applies to working through leaking restorations or carries. It is best to first ensure that the cavity is completely dry before you try to get a reading. 

It has also been noted that trying to use the apex locator for immature teeth will also not give accurate readings. Therefore, if you are preparing a surgery for young patients, this is not the right tool for the job.

As with all surgical instruments and machinery, you will need some practice before you can get accurate results each time. However, the following simple tips can help you improve your accuracy significantly:

• Make sure the canal you want to measure is as dry as possible so that the apex locator is not confused by high moisture content.
• To get your initial working length, use the largest endodontic file possible. 
• Before taking a reading, pull the file away from metal crowns and fillings.
• Make sure the instrument is zeroed before you start taking measurements.

Measuring the length of a root canal requires the utmost accuracy because being off by even a little can cause the implant to not sit properly. As such, learning how to get the best reading from your instrument is a good start.

Failing to get a reading from your dental apex locator is a common problem that most dentists will come across at some point. Unless there is some hardware damage, this issue can be easily resolved. 

Simply make sure that you are using the largest file that will fit in the canal. This is one of the most common recommendations by manufacturers that could help you get the reading you are looking for.